TW573021B - High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance, corrosion resistance, ductility and plating adhesion, after severe deformation, and a method of producing the same - Google Patents

Abstract

The present invention provides: a high-strength high-ductility hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having high fatigue resistance and corrosion resistance; a high-strength hot-dip galvanized steel sheet excellent in ductility, which improves non-plating defects and plating adhesion after severe deformation, and a method of producing the same; a high-strength and high-ductility hot-dip galvanized steel sheet having high fatigue resistance and corrosion resistance; a high-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having superior appearance and workability, which suppresses the generation of non-plating defects, and a method of producing the same; and a high-strength hot-dip galvannealed steel sheet and a high-strength hot-dip galvanized steel sheet, which suppress non-plating defects and surface defects and have both corrosion resistance, in particular corrosion resistance in an environment containing chlorine ion, and high ductility, and a method of producing the same.

Description

573021 V. Description of the invention (1) Technical scope * The present invention relates to a kind of material which is suitable for building materials, household appliances and automobiles, has excellent fatigue resistance and corrosion resistance, and has excellent corrosion resistance and workability in gas ion environment. High strength and high ductility hot-dip galvanized steel plate and hot-dip galvanized and annealed steel plate, and its manufacturing method. BACKGROUND ART Hot-dip galvanized steel is applied to steel plates to provide corrosion resistance. Hot-dip galvanized steel and hot-dip galvanized steel are widely used in building materials, household appliances, and automobiles. As for one of the manufacturing methods, Sencizimir is processed into a continuous production line including the following sequential processes: degreasing and cleaning; heating the steel plate in a non-oxidizing atmosphere; annealing the steel plate in a reducing atmosphere containing hydrogen and nitrogen; cooling To near the temperature of the plating bath; the steel sheet is immersed in a molten zinc bath; and the steel sheet is cooled or cooled after reheating to form an iron-zinc alloy layer. Sandsmill processing methods are widely used to process steel plates. As for the annealing before ore covering, a complete reduction furnace is occasionally used, and the steel plate is not subjected to heat treatment in a non-oxidizing atmosphere just after degreasing α β, and annealing is performed in a reducing atmosphere containing hydrogen and nitrogen. The flux method is also used to include the following processes: degreasing and pickling the steel plate; then using chlorination and the like with a booster; dipping the steel plate in a money bath; and then cooling the steel plate. A small amount of aluminum is added to the plating bath used in processing methods such as A to deoxidize the molten metal. In the Sandsmill method, the zinc plating bath contains about 0.1%! Lu mass ratio. It is known that since the aluminum in the plating process has a stronger affinity for iron than iron-zinc, when the steel plate is forged in Qian Luo, an iron alloy layer is produced, in other words, a concentrated layer, which is 573021. V. Description of the invention (2 ) Thallium-zinc reaction is inhibited. Owing to the presence of the concentrated layer, the resulting coated layer usually has a higher content of aluminum than the aluminum content of the plating bath. Recently, in view of the improvement of automobile durability and reduction of body weight, the intention is to improve the fuel efficiency of automobiles, and the demand for high-strength ore-covered steel plates with excellent processability is increasing. Add Shixi to steel as an economic strengthening method, especially occasionally high ductility and high strength steel sheet containing not less than 1% silicon mass ratio. Furthermore, high-strength steel sheets contain various alloys, and high strength is ensured by microstructural control. In view of this, the heat treatment method has severe limitations. ^ Reviewed from the viewpoint of plating operation, if the steel content of the stone is more than 0.3% by mass, in the case of the conventional Sandzmir method using a ore bath containing Shao, the wettability of the ore coating is significantly degraded, resulting in no plating defects. , Resulting in poor appearance. It is said that the foregoing disadvantages are caused by the poor concentration of Shi Xi oxide on the surface of the steel plate and the poor wettability between silicon oxide and molten zinc during reduction annealing. Taking high-strength steel as an example, as explained above, the added elements are rich, so the alloying heat treatment after ore covering is relatively lower than the case of low-carbon steel, which tends to be applied at higher temperatures for a longer period of time. This is one of the obstacles to ensuring good material quality. Furthermore, from the viewpoint of improving the durability of structural elements, in addition to corrosion resistance, fatigue resistance is also very important. In other words, it is important to develop a high-strength steel sheet having both good plating productivity, good fatigue resistance, and good rhyme resistance. As a means to solve these problems, Japanese Patent Laid-Open Nos. H3-28359 and H3-64437 disclose a method for improving the performance of an It coating by applying a specific ore coating. However, the problem with this method is that the method requires hot dipping. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm).

.......... Dong :: (Please read the notes on the back before filling out this page) • 、 I can charge 573021 A7 ----- ---- V. Description of the invention (3) A new plating device is set up in front of the annealing furnace of the plating production line, or an additional pre-plating treatment is required on the plating production line, which causes an increase in cost. Further, regarding the fatigue resistance and corrosion resistance, although it was recently revealed that the addition of copper is effective, the compatibility of the copper addition with the residual resistance has not been explained. In addition, defects in the silicon flakes generated in the hot rolling process cause poor appearance of the plating in the subsequent processes. The silicon content of the steel must be reduced to suppress the defects of silicon flakes. However, in the case of residual austenitic steel plates or in the case of bidirectional steel plates of typical high ductility and high strength steel plates, silicon as an additive element can extremely effectively improve the relationship between strength and ductility. balance. In order to cope with this problem, a method for controlling the morphology of the generated oxides by controlling the annealing of the air rat 4 was disclosed. However, this method requires special equipment, which increases the cost of new equipment. Further, when a high-strength steel sheet is used, and the weight reduction is achieved by reducing the thickness of the steel sheet and reducing the thickness of the steel sheet, occasionally, a hot-dip galvanized steel sheet or a thermally-keyed annealed steel sheet is required to have more enhanced resistance to narration. For example, the environment in which rock salt is sprayed as a snow melting agent is a harsh environment because the environment contains a relatively high amount of C1 anions. In the case where the plating is exfoliated locally in the part subjected to heavy-duty processing, or the corrosion resistance of the plating itself is insufficient, the substrate is required to have excellent corrosion resistance and to form a plating layer with excellent corrosion resistance. Steel plates have been developed that allow weight reduction and thickness reduction, and issues related to strengthening the strength 'silicon and improving corrosion resistance have been taken into consideration during production. In order to improve the productivity of the key-coated high-strength steel sheet, Japanese Patent Laid-Open No. H5-230608 discloses a hot-dip galvanized steel sheet with a zinc layer of the Meng-Iron system. Although the invention specifically considers productivity, the invention does not take into account that the size of the coated paper when the high-strength and ductile materials are subjected to heavy-duty processing is subject to the Chinese National Standard (CNS) A4 (210X297 mm) 6 ...... ...........- · Installation…: -2 (Please read the precautions on the back before filling in this page)

May I. V. Invention Description (4) Covering the problem of adhesion. The second goal is to improve the absorption capacity of impact energy. Japanese Patent Publication No. 1M89839 discloses a kind of steel plate: it has a main phase containing ferrite, and the average particle size of the phase is not greater than 1G microns. % Volume ratio or martensite 3 to 30% volume ratio of the second phase, the average particle size of the second phase is not large = rice; and optionally contains bainite. However, the invention does not take into account the ore cover and does not provide durability that allows the strength of thick m towns to be increased. DISCLOSURE OF THE INVENTION The present invention provides a high-strength mineralized and galvanized and annealed steel sheet that can solve the foregoing problems, which has excellent appearance and workability, can improve the plating adhesion without ore-covering defects and severe deformation, and Excellent ductility and its manufacturing method 'Procedure-Procedure' The present invention provides a high-strength, high-ductility hot-dip ore steel sheet and a high-strength, high-ductility hot-dip ore-annealed steel sheet, which have excellent corrosion resistance and fatigue resistance. , And its manufacturing method. In addition, the object of the present invention is to provide a high strength which can solve the aforementioned problems, suppress non-plating defects and surface defects, has corrosion resistance and high ductility, and has excellent properties in a special gas ion environment. Hot-dip galvanized steel sheet, high-strength hot-dip galvanized steel sheet, and manufacturing method thereof. The inventors have found through various research results that a galvanized and galvanized steel sheet that has good workability even when the heating conditions are mild, and has high corrosion resistance and high fatigue resistance, and improved galvanization resistance can be manufactured. Microstructure of the interface between the plating layer and the base layer (steel layer) (hereinafter referred to as "plating layer / base layer interface"). In addition, it was found that the high-strength steel sheet was melted 573021 A7 _B7 V. Description of the invention (5) (Please read the precautions on the back before filling this page) The wettability of zinc-melting plating can be achieved by allowing the plating layer to contain a certain amount of specific elements . It was also found that the aforementioned effects can be improved by reducing the degree of plating of the coating. Even in the case where the high-strength steel plate contains a relatively large amount of alloying elements, an excellent coating can be obtained. The means is to control the silicon content of the steel plate. Χ (Mass one hundred and eight ratio), manganese content: Υ (mass percentage) and aluminum content: ζ (mass percentage) and the aluminum content of the plating layer: A (mass percentage) and manganese content: B (mass percentage) satisfy the following equation 1 Achieved: 3 · (χ + Υ / 10 + Z / 3) -12.5χ (Α-Β) ^ 0 .. 1 In addition, it has been found that even if the heat treatment conditions are relaxed, an appropriate amount of alloying element is selected by addition, and, By adjusting the microstructure of the steel sheet, a highly ductile steel sheet can be manufactured. The inventors have found through various research results that in the case of high-strength steel sheets, the wettability of hot-dip galvanized zinc can be improved and the alloy can be accelerated by making a plating layer containing a certain amount of specific elements and by combining the composition of the steel sheet with these elements. Chemical reaction of ore coating. This effect is mainly achieved by controlling the aluminum concentration of the plating layer and the manganese concentration of the steel. The inventors found that by controlling the manganese content of the steel: X (mass percentage) and silicon content: Υ (mass percentage), and the aluminum content of the plating layer: Z (mass percentage) satisfying the following Equation 2 to obtain an excellent plating layer. 0 · 6- (X / 18 + Υ + Z) -0… 2 The inventor found examples of high-strength steel plates through various active research results, by allowing the plating layer to contain appropriate amounts of specific elements, and by combining these elements with steel plates. The composition can improve the wettability of hot-dip galvanizing and hot-dip galvanizing annealing, accelerate the alloying reaction of the alloy coating, and also improve the ductility and corrosion resistance. This paper applies the Chinese National Standard (CNS) A4 specification (210X297) %) 573021 A7

5. Description of the invention (6). This effect is mainly achieved by controlling the aluminum and molybdenum concentrations of the plating layer and the molybdenum concentration of the steel sheet. In other words, it was found that the thickness of the aluminum through the plating layer ranges from 0.00 to 0.001%. In addition, the aluminum content of the plating layer: A (mass percentage) and the molybdenum content: B (mass percentage), and the molybdenum content of the steel plate were controlled: C (mass percentage) thus satisfies the following Equation 3, and a high-strength and high-ductility hot-dip galvanized and annealed steel sheet can be obtained: l〇〇 ^ (A / 3 + B / 6) / (C ^ 6) ^ 0.01 ... 3 The invention is based on the foregoing findings, and the effects of the present invention are as follows: (1) A high-strength, high-strength, hot-dip galvanized steel sheet and a hot-dip galvanized steel sheet with high fatigue resistance and corrosion resistance. The galvanized or galvannealed steel sheet has a plating layer on the surface of the base layer composed of the steel sheet, and is characterized in that the grain boundary formed at the interface between the plating layer and the base layer is oxidized to a maximum depth of not more than 0.5 μm. (2) — A kind of high-strength and high-strength hot-dip galvanized steel sheet and hot-dip galvanized steel sheet with high fatigue resistance and corrosion resistance. The hot-dip galvanized or galvanized steel sheet has a plating layer on The surface of the substrate layer composed of steel plate is characterized in that the grain boundary formed at the interface between the key cladding layer and the substrate layer is oxidized to a maximum depth of not more than 1 micrometer, and the average particle diameter of the main phase of the microstructure of the substrate layer does not exceed 20 micrometers. . (3) — A kind of high-strength, high-strength, hot-dip galvanized steel sheet and hot-dip galvanized steel sheet with high fatigue resistance and corrosion resistance, according to (1) or (2) 'Hot-dip galvanized or Galvanized and annealed steel sheet has a plating layer on the surface of the base layer composed of steel sheet, which is characterized by the boundary formed between the plating layer and the base layer 9 (Please read the precautions on the back before filling this page) This paper size applies to China Standard (CNS) A4 specification (210X297 mm) 573021 A7 B7 V. Description of the invention (The surface grain boundary is oxidized to the maximum thickness except for the average grain size of the main phase of the underlying microstructure. The value obtained is not more than 0.1. ⑷ High fatigue resistance and corrosion resistance according to any one of items (1) to (3) | South ductile hot-dip galvanized steel sheet and hot-dip zinc-annealed steel sheet characterized by the steel sheet The main structure contains 50 to 97% volume ratio of ferrite or ferrite to bainite as the main phase, and 3 to 50% volume ratio of either or both of martensite and austenite is used as the main phase. (5) High fatigue resistance according to any one of (1) to (4) and Corrosive south strength high ductility hot-dip galvanized steel sheet and hot-dip galvanized annealed steel sheet are characterized in that the ore coating layer contains mass: 0.001 to 0.5%, and manganese: 0.001 to 2%, The balance is composed of zinc and unavoidable impurities; and the stone content of the steel plate, X (mass percentage), manganese content: γ (mass percentage), aluminum content: z (mass percentage), and the aluminum content of the coating: A (mass percentage) and violent content: B (mass percentage) satisfies the following equation si: 3- (X + Y / 1〇 + Z / 3) -12.5x (AB) ^ 〇 ... 1 (6) According to ( 5) High strength and high ductility hot dip galvanized steel sheet and hot dip galvanized annealed steel sheet with southern fatigue resistance and surplus property, characterized in that the coating layer contains 5 to 20% by mass of iron (7) —A kind of high-strength hot-dip galvanized steel sheet with high plating adhesion and ductility after severe deformation. The hot-dip galvanized steel sheet has a plating layer containing by mass, aluminum: 0.001 to 0.5 %, And 10 (Please read the notes on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 Grid (210 X 297 mm) 573021 A7 B7 V. Description of the invention (8) Manganese: 0.001 to 2%. The difference is composed of zinc and unavoidable impurities on the surface of the steel plate. The composition of the steel plate is based on mass. Carbon: 0.0001 To 0.3%, silicon: 0.01 to 2.5%, manganese: 0.01 to 3%, aluminum: 0.001 to 4%, and the difference is composed of iron and unavoidable impurities, which is characterized by the content of steel stone: X (mass Percentage), manganese content: γ (mass percentage) and aluminum content: Z (mass percentage), and the aluminum content of the coating: A (mass percentage) and bell content: B (mass percentage) satisfy the following equation 1; and the steel plate The microstructure has a volume ratio of 70 to 97% by volume of the main phase, the average particle size of the main phase is not greater than 20 microns, and a volume ratio of 3 to 30% of the austenite and / or martensite in the second phase, and The average particle size of the two phases is not more than 10 microns: 3- (X + Y / l0 + Z / 3) -12.5x (AB) ^ 0 ... 1 (8) After severe deformation according to item (7), High-strength hot-dip Zn-bonded zinc steel plate with high plating adhesion and ductility, characterized in that the plating layer further comprises 5 to 20% Ratio of iron. (9) High-strength hot-dip galvanized steel sheet with high plating adhesion and ductility after severe deformation according to item (7) or (8), characterized by austenite and / or constituting the second phase of the steel sheet The average particle size of martensite is 0.001 to 0.7 times the average particle size of ferrite. (10) High-strength hot-dip galvanized steel sheet with high plating adhesion and ductility after severe deformation according to any one of items (7) to (9), characterized by (Please read the precautions on the back first (Fill in this page again)-Order 丨, 0m,

573021 A7 ------- B7_ V. Description of the invention (9) The microstructure of the steel plate: it has a main phase containing 50 to 97% volume ratio of ferrite 'and the average particle size of the main phase is not more than 2 〇 Micron, and a second phase containing 3 to 30% by volume of austenite and / or martensite, the average particle size of the second phase is not greater than 10 microns; and bainite additionally containing 2 to 47% by volume. (11) The high-strength hot-dip galvanized steel sheet having high plating adhesion and ductility after severe deformation according to any one of items (7) to (10), characterized in that the steel sheet further contains 0.001 to 5% Mass ratio of molybdenum. (12) The high-strength hot-dip galvanized steel sheet having high plating adhesion and ductility after severe deformation according to any one of items (7) to (11), characterized in that the steel sheet further contains by mass, O.OOiSO "% phosphorus and 0.001 to 0.01% sulfur. (13) A high-strength hot-dip galvanized steel sheet with high plating adhesion and ductility after severe deformation according to any one of items (7) to (12), characterized in that the steel sheet has a silicon content of 0.001 to 2.5%. (14) A high-strength hot-dip galvanized and annealed steel sheet having excellent appearance and processability. The hot-dip galvanized and annealed steel sheet has a coating layer by mass, and contains: manganese: 0.001 to 3%, and aluminum: 0.001 to 4%, molybdenum: 0.0001 to 1%, and iron: 5 to 20%. The difference is composed of zinc and unavoidable impurities on the surface of the steel plate. The composition of the steel plate is, by mass, carbon 0.0001 to 0.3%, 12 (Please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) 573021 A7 B7 Description of invention (10) Silicon 0.001 to less than 0.1%,! Meng 0.01 to 3%, aluminum 0.001 to 4%, molybdenum 0.001 to 1%, 0.0001 to 0.3%, sulfur 0.0001 to 0.1%, and the balance is composed of iron and unavoidable impurities, which is characterized by the manganese content of the steel X (mass percentage) And silicon content: γ (mass percentage), and the aluminum content of the plating layer: Z (mass percentage) satisfies the following formula 2: 0.6- (X / 18 + Y + Z) ^ 0 ... 2 (15) —species High-strength hot-dip galvanized steel sheet with excellent appearance and workability The hot-dip bond steel sheet has a mineral coating by mass, containing: 0.001 to 3% in aluminum, 0.001 to 4% in aluminum, 0.0001 to 1% in molybdenum, and less than 5% in iron. The difference is due to zinc and unavoidable impurities It is composed on the surface of the steel sheet. The composition of the steel sheet is, by mass, 0.0001 to 0.3% carbon, 0.001 to less than 0.1% silicon, 0.01 to 3% aluminum, 0.001 to 4% aluminum, 0.001 to 1% molybdenum, ... 0.0001 to 0.3%, (Please read the precautions on the back before filling this page) This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) 13 573021 A7 B7_ V. Description of the invention (11) Sulfur: 0.0001 to 0.1%, and the difference is composed of iron and unavoidable impurities, which are characterized by the manganese content of the steel: X (mass percentage) and silicon content: Y (mass percentage), and the aluminum content of the coating: Z (mass percentage ) Satisfies the following equation 2: 0.6- (X / 18 + Y + Z) ^ 0 ... 2 (16) —a type of hot-dip galvanized and annealed steel sheet with high corrosion resistance, high strength and high ductility, the hot-dip Galvanized and annealed steel sheet has a plated layer and, by mass, contains: : 0.001 to 4%, and iron: 5 to 20%. The difference is composed of zinc and unavoidable impurities on the surface of the steel plate. The composition of the steel plate is, by mass, (Please read the precautions on the back before filling this page. ), Tr— carbon: 0.0001 to 0.3%, silicon: 0.001 to less than 0.1%, violent: 0.001 to 3%, aluminum: 0.001 to 4%,! Mesh: 0.001 to 1%, scale: 0.001 to 0.3%, -fee- Sulfur: 0.0001 to 0.1%, and the balance is composed of iron and unavoidable impurities, which are characterized by the aluminum content of the ore coating: A (mass percentage) and molybdenum content: B (mass percentage), and the molybdenum content of steel : C (mass percentage) satisfies the following Equation 3; and the microstructure of the steel is composed of a main phase containing 50 to 97% by volume of ferrite or ferrite and bainite, and the difference is composed of containing Martens And retained austenite 14 This paper size applies the Chinese National Standard (OJS) A4 specification (210X297 public reply) 573021 A7 £ 7 ____ 5. Either or both of the invention description (12) account for 3 to 50% of the volume ratio Composite structure composition: 100 ^ (A / 3 + B / 6) / (C ^ 6) ^ 0.01 ... 3 (17) —species with height Corrosive, high-strength, hot-dip bonded iron-zinc steel sheet, the hot-dip galvanized steel sheet has a plating layer, and contains, by mass, aluminum: 0.001 to 4%, and iron: less than 5%, The difference is composed of zinc and unavoidable impurities on the surface of the steel plate. The composition of the steel plate is, by mass, carbon: 0.0001 to 0.3%, silicon: 0.001 to less than 0.1%, hard: 0.001 to 3%, and aluminum: 0.001 to 4%, Molybdenum: 0.001 to 1%, Phosphorus: 0.001 to 0.3%, Sulfur: 0.0001 to 0.1%, and the balance is composed of iron and unavoidable impurities. It is characterized by the aluminum content of the coating: A (mass Percentage) and molybdenum content: B (mass percentage), and the molybdenum content of steel: C (mass percentage) satisfies the following Equation 3; and the microstructure of the steel is composed of ferrite or ferrite and bainite 50. The main phase is composed of 97% by volume, and the difference is composed of a composite structure containing one or both of martensite and retained austenite, which accounts for 3 to 50% by volume: 100 ^ (A / 3 + B /6)/(C^6)^0.01 ... 3 (18) Excellent appearance according to any one of (14) to (17) and 15 (please Read the notes on the reverse side and fill in this page) This paper size is applicable to Chinese National Standard (CNS) A4 (210X297 mm) 573021 A7 _____B7_ V. Description of the invention (13) Workability of high-strength hot-dip galvanized steel and The galvanized and annealed steel sheet is characterized in that the microstructure of the steel sheet has a main phase containing 50 to 97 ❶ volume ratio ferrite or ferrite and bainite, and the difference is composed of martensite and residual austenite. A composite structure composed of one or both of corpuscles with a volume ratio of 3 to 50%. (19) The high-strength hot-dip galvanized steel sheet and hot-dip galvanized steel sheet having excellent appearance and processability according to any one of (14) to (18), characterized in that the microstructure of the steel sheet has It contains a main phase of 70 to 97% by volume ferrite, the average particle size of the main phase is not greater than 20 microns, and the second phase contains 3 to 30% by volume of austenite and / or martensite and a second phase The average particle size is not greater than 10 microns. (20) The high-strength hot-dip galvanized steel sheet and hot-dip galvanized steel sheet having excellent appearance and processability according to any one of items (14) to (19), characterized in that the steel sheet has a second phase system Composed of austenite; and carbon content of steel: C (mass percentage) and manganese content: Mn (mass percentage), and austenite grain percentage: νγ (expressed as a percentage) and ferrite and bainite Volume percentage · Voc (expressed as a percentage) satisfies the following equation 4: (VY + Va) / VyxC + Mn / 8 ^ 2.0 ... 4 (21) According to any one of (14) to (20), South-strength hot-dip galvanized steel sheet and hot-dip galvanized steel sheet with excellent appearance and processability are characterized by the microstructure of the steel sheet: it has a main phase containing 50 to 95% volume ratio ferrite. Phase average particle size is not greater than 20 microns; and a second phase containing 3 to 300/0 grain ratio austenite and / or martensite, the average particle size of the second phase is not greater than 10 microns, and further contains 2 to 47% volumetric bainite. This paper size applies Chinese National Standard (CNS) A4 specifications (21〇 > < 297 public love) 16 (Please read the precautions on the back before filling this page)

， 可 I 573021 A7 ___B7 V. Description of the invention (l4) (22) High-strength hot-dip galvanized steel sheet with high corrosion resistance according to any one of (14) to (21) and annealing The steel plate is characterized by (please read the precautions on the back side and then fill out this page). The average grain size of austenite and / or martensite in the second phase of the steel plate is 0.01 to 0.6 times the average grain size of ferrite. (23) The high-strength hot-dip galvanized steel sheet having plating adhesion and ductility after severe deformation according to any one of items (1) to (22), characterized in that the plating layer further contains the following by mass One or more

Ca: 0.001 to 0.1%, Mg: 0.001 to 3%, Si: 0.001 to 0.1%, Mo: 0.001 to 0.1%, W: 0.001 to 0.1%, Zr: 0.001 to 0.1%, Cs: 0.001 to 0.1%, Rb : 0.001 to 0.1%, K: 0.001 to 0.1%, Ag: 0.001 to 5%, Na: 0.001 to 0.05%, Cd: 0.001 to 3%, Cu: 0.001 to 3%, Ni: 0.001 to 0.5%, Co: 0.001 to 1%, La: 0.001 to 0.1%, T1: 0.001 to 8%, the paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) 17 573021 A7 B7 V. Description of the invention (l5)

Nd: 0.001 to 0.1%, Y: 0.001 to 0.1%,

In: 0.001 to 5%,

Be: 0.001 to 0.1%,

Cr: 0.001 to 0.05%,

Pb ··· 0.001 to 1%,

Hf: 0.001 to 0.1%,

Tc: 0.001 to 0.1%,

Ti: 0.001 to 0.1%,

Ge: 0.001 to 5%,

Ta: 0.001 to 0.1%, V: 0.001 to 0.2%, and B: 0.001 to 0.1%. (24) The high-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having excellent appearance and processability according to any one of items (1) to (23), characterized in that the steel sheet is based on mass Further containing one or more of the following,

Cr: 0.001 to 25%,

Ni: 0.001 to 10%,

Cu: 0.001 to 5%,

Co: 0.001 to 5%, and W: 0.001 to 5%. (25) The high-strength hot-dip Zn-bonded zinc steel sheet and hot-dip galvannealed steel sheet having excellent appearance and processability according to any one of items (1) to (24), characterized in that the steel is based on mass Further contains Nb, Ti, V, Zr, Hf to 18 (Please read the precautions on the back before filling in this page) This paper size applies the Chinese National Standard (Norway) A4 specification (21〇 > < 297 public love) 573021 A7 __ B7 5. Description of the invention (16) and one or more of Ta, a total of 0.001 to 10 / 〇. (26) The high-strength hot-dip galvanized steel sheet and hot-dip galvanized steel sheet having excellent appearance and processability according to any one of items (1) to (25), characterized in that the steel further contains boron 0.0001 To 0.1% by mass. (27) The high-strength hot-dip galvanized steel sheet and hot-dip galvanized steel sheet having excellent appearance and processability according to any one of items (1) to (26), characterized in that the steel further contains One or more of Baht, Bow, Magnesium, and Maggot, the content is 0.0001 to 1% by mass. (28) The high strength and ductility hot-dip galvanized steel sheet and hot-dip galvanized steel sheet with high fatigue resistance and corrosion resistance according to any one of items (1) to (27) are characterized by: The interface between the plating layer and the steel plate to a depth of 10 microns contains one or more of Si02, MnO, and A1203, accounting for 0.1 to 70% of the total area; and satisfying the following equation 5: {MnO (Expressed as area percentage) + Ai2〇3 (expressed as area percentage)} / Si〇2 (expressed as area percentage) -〇1 5 (29) has a height according to any one of (1) to (28) Fatigue and corrosion resistance high strength and high ductility hot-dip galvanized steel sheet and hot-dip galvanized annealed steel sheet are characterized in that the steel contains γ203, Zr〇2, Hf〇2, Ding 03, One or more of La203, Ce203, Ce02, CaO, and MgO, the range from the interface between the plating layer and the steel plate to a depth of 10 micrometers is 0.0001 to 10.0% of the total area percentage. (30)-A method for manufacturing a high-strength hot-dip galvanized steel sheet and a hot-dip galvanized steel sheet with high plating adhesion and ductility after severe deformation, which is characterized in that the casting includes according to (1) to (29) The chemical paper size of any one of the items applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) 19 (Please read the precautions on the back before filling this page) Order 573021 A7 B7 17 V. Invention Instructions (please read the precautions on the back before filling this page) composition steel, or cool the cast slab once after casting; then heat the cast slab again; then the hot rolled cast slab can become a hot rolled steel plate and disc Juanzhi 'pickled and cold-rolled hot-rolled steel sheet; then annealing the cold-rolled steel sheet at a temperature not lower than Ac 丨 (° C) to not more than Ac3 + 50 (° C) for 10 seconds to 30 minutes; then ^丨 Cooling the steel plate to a temperature of 650 to 70 (rc at a cooling rate of ⑺ to ⑺ / s; subsequently cooling the steel plate at a rate of ⑺ to ⑺ C / s to from a bath temperature to a bath temperature + 100%. Temperature range, maintain the steel plate in the galvanizing boat bath temperature to the galvanizing bath temperature The temperature in the + 100 ° C range is from 1 to 3,000 seconds, including the subsequent immersion plating time; the money-immersed steel plate is in a zinc plating bath; and then the steel plate is cooled to room temperature. (31) —A manufacturing basis according to (1) to (29) The method of high strength hot-dip galvanized steel sheet and hot-dip galvanized steel sheet according to any one of the above items), the hot-dip galvanized steel sheet has excellent appearance and processability, and is characterized in that casting includes (1 ) To (29) of any one of the chemical composition steels, or cooling the cast slab after casting, and then heating the cast slab to 1,180 to 1,25 (TC temperature; to 880 to 1, Hot rolled at 100 C; then pickled and cold rolled hot rolled steel coils; then at not less than 0.1x (Ac3-Aci) + Aci (t) to not higher than Ac3 + 50 (° C) The cold-rolled steel sheet is annealed over a temperature range of 10 seconds to 30 minutes; then the steel sheet is cooled to a temperature range of 650 to 700 ° C at a cooling rate of 0.1 to 10 it / s; and then 0.1 to 100. (] / Sec rate to cool the steel plate to the temperature range from the plating bath temperature -50 ° C to the plating bath temperature + 50 ° C; then dip the steel plate in the bell bath; maintain the steel plate at the plating bath temperature The temperature range from _50 ° C to the bath temperature + 50% is from 2 to 200 seconds, including the immersion plating time and subsequent cooling of the steel plate to room temperature. 20 This paper size applies the Chinese National Standard (CNS) A4 specification (21〇χ297 (Public love) 573021 A7 ___ B7 V. Description of the invention (18) (32) — A kind of high strength and ductility hot dip galvanized steel sheet and hot dip galvanized according to any one of (1) to (29) Method of zinc annealing steel sheet, the hot-dip ore zinc steel sheet has excellent margins, and is characterized by flooding cast steel containing a chemical composition such as any one of (^) to (29), or casting After cooling the cast tweezer chain once; then heating the cast slab again to degrees; then hot rolling the heated slab at a total thinning rate of 60 to 99% and a temperature of about 1,000 to 1,150 ° C; then pickling And cold-rolled hot-rolled steel sheet after finishing and coiling; then annealing the cold-rolled steel sheet in a temperature range of not less than 0.12x (AC3_ACl) + AClrc) to not more than Ac3 + 50 (° C) for 10 seconds to 3 〇minute time; then after annealing, cool the steel plate, when the maximum temperature reached during the annealing is defined as TmaxfC), Tmax / 1, 000 to Tmax The cooling rate of / 1 (TC / s is to cool the steel plate to a temperature range of Tmax-200 to Tmax-l0 (TC; subsequently, the steel plate is cooled at a cooling rate of 0.1 to 100X: / s to a bath temperature of -30. 〇to the temperature range of the mineral bath temperature + 50 ° C; then dip the steel plate in the plating bath; maintain the steel plate in the temperature range of the plating bath temperature -30t to the plating bath temperature + 50 ° C for 2 to 200 seconds, including dip plating Time and then, cool the steel plate to room temperature. (33) A method for manufacturing a high-strength, high-strength, hot-dip galvanized steel sheet and a hot-dip galvannealed steel sheet with high fatigue resistance and corrosion resistance, characterized in that: a flood casting method including (1) to (29) The steel of chemical composition of any one of the items, or cooling the cast slab once after casting; then heating the cast slab again; then hot-rolling the cast slab into a hot-rolled steel sheet and coiled hot-rolled steel sheet; then Pickled and cold-rolled hot-rolled steel plates; then control the annealing temperature to anneal the cold-rolled steel plates, so that the highest temperature during annealing ranges from not lower than 0.1xCAcrAdHAqfC) to not higher than Ac3 + 30 (° C): Then take 21 (please read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 573021 A7 -----— B7______ V. Description of the invention (19 ) ο · 1 to 10 c / s cooling rate to cool the steel plate to 650 to 71. (: Temperature range; then cool the steel plate from a galvanizing bath temperature to a galvanizing bath temperature + 100X: at a cooling rate of 1 to loot: / s; maintain the steel plate at the galvanizing bath temperature to a galvanizing bath temperature + The temperature range of 10.0% is from 1 to 300 seconds, including the subsequent immersion plating time; the immersion-plated steel sheet is in a galvanizing bath; and then the steel sheet is cooled to room temperature. (34) According to items (30) to (33) High-strength hot-dip ore zinc steel sheet and hot-dip gold-zinc annealed steel sheet with high fatigue resistance, corrosion resistance, and plating adhesion and ductility after severe deformation, and a method for manufacturing the same, characterized in that: : After dipping the steel sheet in a galvanizing bath, from 300 to 5500 t: Applying alloying treatment to the steel sheet and cooling to room temperature. Best Mode for Carrying Out the Invention The details of the present invention will be described later. Specific Example 1 Dianming people will be based on quality, from 0 0001 to 0 3% carbon, 001 to 2 5% silicon, 0.01 to 3% manganese, 0.001 to 4% aluminum and the difference is iron and unavoidable impurities steel plate Accept the following treatments: the temperature range of the steel plate is not lower than O.WAcyAcO + AcKt :) to not higher than Ac3 + 50 (° C) Annealing for 10 seconds to 30 minutes; then cooling the steel plate at a cooling rate of 0.1 to 10 ° c / second to a temperature range of 6500 to 700C; subsequently cooling the steel plate to a cooling rate of 1 to 1000 / second to Plating bath temperature (450 to 470. 0 to plating bath temperature + 10 (TC temperature range; at 450 to 470. (3 temperature dip shovel steel plate in the zinc bath of the ship for 3 seconds; and heating the steel plate at 500 to 550 ° C 10 to 60 seconds. Then evaluate the plating properties by measuring the uncoated part of the surface of the ore-covered steel plate. Evaluate the corrosion resistance by applying repeated salt spray tests. Further, by pulling force 22 (Please read the precautions on the back before filling this page ) This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 573021 A7 ____B7_ V. Description of the invention (20) The test evaluates the mechanical strength. The fatigue properties of the plated steel sheet are equivalent to those of the steel sheet by plane bending fatigue test. The tensile strength of 50% was evaluated. Further, after providing a 20% tensile strain, the steel sheet was bent at 60 degrees and folded back, and the vinyl tape was pasted to the bend-formed part, and the second roasted tape was peeled off. 'Then, the image analysis was used to quantitatively measure the area of the peeled plating to evaluate the adhesion of the plating. As a result, it was observed that the grain boundary of the silicon-based oxide at the interface between the plating layer and the base layer was rich. The relationship between the shape of the oxide layer and the fatigue properties, controlling the maximum depth of the grain boundary oxide layer and the average particle size of the main phase of the microstructure finally obtained, can produce high strength and high ductility with excellent fatigue resistance and touch resistance. Hot-dip galvanized steel. In other words, the inventors found that the microstructure obtained at the end can prolong the hot-dip by controlling the maximum depth of the silicon-containing grain boundary oxide layer at the interface between the plating layer and the base layer to be 0.5 microns or less. Fatigue life of galvanized steel. In addition, by selecting the manufacturing conditions of the steel composition, the maximum degree of grain boundary oxide layer is allowed to be 0.5 microns or less and preferably 0.2 microns or less, which can further extend the resistance of the hot-dip galvanized steel sheet. Fatigue life. In addition, the inventors found that by limiting the type and area percentage of oxides containing grain boundary oxides in the steel from the interface between the plating layer and the steel plate to a depth of 10 microns, the corrosion resistance, especially after alloying, can be further improved And fatigue resistance. In other words, a high-strength, high-strength, hot-dip galvanized steel sheet or annealed galvanized steel sheet with excellent corrosion resistance and fatigue resistance can be obtained by: The steel contains one of silicon dioxide, manganese oxide, and aluminum oxide. One or more main oxides occupy the range from the interface between the bond cladding and the steel plate to a depth of 0 micrometers. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) --------- ----------: Cao…: \ · (Please read the notes on the back before filling in this page} 、 Yingding 丨 23 573021 A7 ___B7_ V. The percentage of the total area of the invention (21) 0.4 to 70%; and by controlling such area percentages to satisfy the following expression: {MnO (area percentage) + A12〇3 (area percentage)} / Si〇2 (area percentage) ^ 0.1 The inventor found that 〇2, MnO and Al2O3 contain Y2O3, Zr02, Hf02, Ti02, La203, Ce2O3, Ce02, CaO and

One or more of MgO has an area percentage ranging from 0.0001 to 10.0% from the interface between the plating layer and the steel plate to a depth of 10 microns, and can also improve the survivability and financial fatigue after alloying. The identification, observation, and area percentage measurement of oxides present in the steel from the interface between the plating layer and the steel plate to a depth of 10 micrometers as described above can be performed using EPA, FE-SEM, and the like. In the present invention, the area percentage is obtained by measuring more than 50 fields of view at a magnification of 2,000 to 20,000 times, and then analyzing the data using image analysis. The identification of the oxides is carried out by repeating the test specimens prepared for extraction and using TEM or EBSP. The aforementioned Mn0, A1203 & SiO2 can be identified by elemental analysis and structure identification by finding the most similar objects, but occasionally there are cases where the object is a complex oxide containing other atoms or a structure with multiple defects. The area percentage can be obtained by scanning each component using area such as EPMA and FE-SEM. In this case, although it is difficult to accurately identify each structure, the structure analysis can be used together with the shape and organization to make a judgment. Then, the area image can be obtained through the image analysis of the area scan. The inventors found that, similarly, by controlling the average particle size of the main phase of the steel plate to be not more than 20 microns, and oxidizing the grain boundary at the interface between the plating layer and the substrate layer, the paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) (Please read the precautions on the back before filling out this page) • Order · 24 573021 A7 _________B7 V. Description of the invention (22) The maximum depth of the layer in the microstructure is not more than 1 micron, which can prolong the fatigue life. It was also found that by controlling the microstructure of the steel sheet, the maximum depth of the grain boundary oxide layer formed at the interface between the plating layer and the base layer divided by the average particle diameter of the main phase was not greater than 0.1, and high fatigue resistance and corrosion resistance were obtained. High-strength south ductile hot-dip galvanized steel sheet and hot-dip galvanized steel sheet. With regard to the properties of mirror coating and insect resistance, it was found that as long as the following conditions are met, no plating defects will form even on steel plates that are particularly rich in silicon, and the rust formed by the heavy salt spray test is extremely small: Shi Xi content: χ (mass percentage), manganese content: γ (mass percentage) and aluminum content: z (mass percentage), and the aluminum content of the plating layer: A (mass percentage) and manganese content: B (mass percentage) It satisfies the following equation 1: 3- (X + Y / l0 + Z / 3) -12.5x (AB) ^ 0 ... 1 Recently, through multiple data regression analysis, it is found that equation 丨 shows the steel plate and the coating. Effects of various components on the wettability of the plating. Here, 5 containing an inhibitor was used for the plating layer. / ◦ The value measured by chemical analysis after the hydrochloric acid solution is dissolved. Specific Example 2 The inventor will, by mass, have a steel plate having the following composition: carbon: 0.0001 to 0.3%, silicon: 0.001 to less than 0.1%, manganese: 0.01 to 3%, aluminum: 0.001 to 4%, molybdenum: 0.001 to 1%, Phosphorus: 0.0001 to 0.3%, 25 (Please read the notes on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

573021 V. Description of the invention (23) Sulfur: 0.0001 to 0.1%, and the balance is composed of iron and unavoidable impurities, and accept the following treatments: annealed steel sheet; at 450 to 470 t: temperature-dip galvanized steel sheet in a galvanizing bath 3 seconds; and heating part of the test piece at 500 to 530 ° C for 10 to 60 seconds. The incidence of defects on the surface of the plated steel sheet was then divided into five grades to evaluate the appearance of the steel sheet. Tensile tests are also used to evaluate mechanical properties. It was found that when the following properties were met: "Evaluation level 5 'represents a rare observed appearance defect: the fierce content of steel is defined as X (mass percentage) and the silicon content is defined as γ (mass percentage), and the coating is The aluminum content is defined as Z (mass percentage), and X, y, and 2 satisfy the following equation 2: 〇.6- (X / 18 + Y + Z) ^ 〇 ... 2 Visually observe the formation state of no plating defects And the flaw formation state and pattern are classified into observation levels 丨 to 5 and the appearance of the plated steel sheet is evaluated. The evaluation criteria are as follows. · Rating 5: Rare observation of no plating defects, flaws and patterns (not more than 1% area percentage), Evaluation level 4: Slightly no plating defects, flaws and patterns (greater than 1% to no greater than) 10% area percentage), scoring level 3: a little no plating defects, flaws and patterns (greater than 10/0 to no more than 50% area percentage), sweat estimation level 2: a lot of no plating defects, flaws and patterns ( Greater than 50% area percentage), evaluation level 1: the surface of the steel sheet is not wetted by the ore cover. Specific embodiment 3 ^ Zhang scale is applicable _ A4 specifications (210X297_--(Please read the precautions on the back before filling this page) • Order 丨 021 021 A7 B7 V. Description of the invention (24 The inventor will measure by mass' has the following Composition of steel plate, 0.0001 to 0.3%, 0.001 to less than 0.1%, 0.01 to 3%, 0_001 to 4%, 0.001 to 1%, 0.0001 to 0.3%, 0.0001 to 0_1%, and the difference is made of iron and unavoidable impurities The composition is subjected to the following treatments: annealed steel sheet; dip-plated steel sheet in a galvanizing bath for 3 seconds at a temperature of 450 to 470 t; further 500 to 550 t: part of the test piece is heated at a temperature of 10 to 60 seconds. Subsequently, the steel sheet undergoes full flat bending (R = lt), the bending test piece is based on the Japanese Automobile Engineering Society (JSAE) standard (JAS0), and undergoes periodic humer test for up to 150 cycles. Through even !, _ times magnification, using an optical microscope of not less than Observe the appearance of the surface and the cross-section in 20 fields of vision, observe the progress of the corrupted money to the internal level, and divide the observation results into five levels to assess the status of surplus. The evaluation criteria are as follows: Ping estimate level 5: progress of surplus: only Corrosion depth of ore scum residue material is less than 50 microns, soil & assessment level 4: degree of decay performance: base material decays from micron to less than 100 microns, again scoring grade 3: degree of decay performance of base material • corrosion plate of base material The thickness is half, and the degree of clothing is less than that of steel. Evaluation level 2: Surname progression: The depth of the rotten surface of the base material is not less than the size of this paper. Chinese National Standard (CNS) A4 specifications (210X297 public love) 27 and 5

Order (Please read the notes on the back before filling this page), ΦΜ, 573021 25, invention description (half the thickness of the steel plate, evaluation level 1: perforation. As a result, when the following conditions are met, evaluation level 4 or Good residual resistance of 5: The aluminum content of the plating layer is in the range of 0.001 to 4%, which is defined as A (mass percentage), the molybdenum content of the plating layer is defined as B (mass percentage), and the steel pin content Defined as C (percent by mass), and A, B, and C satisfy the following equation 3: l〇〇 ^ (A / 3 + B / 6) / (C ^ 6) ^ 0.01 ... 3 The details of the reasons for the defects are not fully understood, but it is inferred that the non-plating defects are caused by the poor wettability between the aluminum added to the plating bath and the silicon dioxide formed on the surface of the steel sheet. Therefore, it can be removed by adding to the galvanizing bath. The bad element of aluminum suppresses the occurrence of non-plating defects. As a result of active research by the inventors, it has been found that the above-mentioned purpose can be achieved by adding an appropriate concentration range of I Menco. It is inferred that oxides are formed more preferentially than aluminum added to the galvanizing bath. Thin film to enhance the silicon system formed on the surface of the steel plate Reactivity between oxide films. It is further predicted that defects caused by silicon flakes formed during hot rolling can be suppressed by reducing the silicon content of the steel, and at the same time, the appearance can be effectively improved. Further, regarding the materials accompanied by the reduction of the stone content Deterioration of quality, it was found that by adjusting manufacturing conditions and adding other components such as aluminum and molybdenum and reducing the silicon content, ductility can be ensured, and the addition of aluminum can also effectively accelerate alloying. The reason for this is unknown, but it is speculated that it is not due to non-plating defects , Other defect shapes, and the difference in corrosion resistance (potential difference) between the base material and the plating layer. This paper size Gu towel _ home ㈣ (⑽ Xian 297 public love) 28 (Please read the precautions on the back before filling this page )-, Tr— 573021 A7 p. V. Description of the invention (26 ^ _ '~; ~ Although the shovel deposition amount is not specified here, it is better from the viewpoint of survivability, and the deposition amount on one side is not less than 5 G / mm2, although the upper layer is applied to the hot-dip galvanized steel sheet of the present invention to improve coating properties and wet / door treatment such as chromate treatment, Acid salt treatment, lubricity advancement / stupidity improvement treatment, etc. are applied to the hot-dip zinc alloy steel sheet of the present invention, and these conditions do not depart from the scope of the present invention. The preferred microstructure of the base steel sheet is second, The preferred microstructure of the base steel plate is discussed later. It is better to make the main structure into a ferrite phase to ensure sufficient ductility. However, when higher strength is required, a bainite phase can be included, but from the perspective of ensuring ductility, In other words, it is desirable that the main phase contains a single ferrite phase or a composite phase of ferrite and bainite (unless otherwise stated, this description section refers to the definition of "ferrite or ferrite and bainite". Same) Not less than 50/0, preferably 70% volume ratio. Taking ferrite and bainite composite phases as examples, it is preferred that the ferrite content is not less than 50% volume ratio, to ensure that ductility is obtained. In terms of it, in order to obtain high strength and ductility in a well-balanced manner, it is better to make the ferrite or ferrite and bainite content not more than I 97% volume ratio. Furthermore, in order to obtain both high strength and high ductility, it is also desirable to produce a composite structure containing retained austenite and / or martensite. In order to obtain high strength and high ductility at the same time, it is better to make the total volume of retained austenite and / or martensite not less than 3%. However, if the total volume exceeds 50%, the steel sheet tends to be brittle, so it is desirable to control this value to not exceed 30%. In order to obtain the high ductility of the steel sheet itself, it is specified that the average grain size of the ferrite is not more than 20 m, and the average grain size of the austenite and / or martensite that constitute the second phase is not more than 10 m. Here we want to make the second phase from austenite and / or the paper size applicable in China _ Home Standard (CNS) A4 specification (2 Huan 297 public love): ----

• Order — (Please read the notes on the back before filling out this page) 573021 A7 I -----—---- Ξ ____ V. Description of the invention (27) or martensite, and let austenite and / Or the average particle size of martensite is not larger than 0.7 times the average particle size of the ferrite constituting the main phase. However, since it is difficult to make the average grain size of austenite and / or martensite constituting the second phase smaller than 0.01 times the average grain size of ferrite, it is preferable that the magnification is not less than 0.001. In addition, in order to ensure that the gadolinium only has good ore cover adhesion and obtains high strength and high ductility in a balanced manner, when the second phase of the steel plate is composed of austenite, the carbon content of the steel is specified: c (mass percentage) and Manganese content: Mn (mass $%), and austenite volume percentage: νγ (expressed as a percentage) and ferrite and bainite volume percentages · Va (expressed as a percentage) satisfies the following equation 4: (Vy + Va) / VyxC + Mn / 8 > 2.0 ... 4 By satisfying the above expressions, a steel plate having excellent balance between strength and ductility and good plating adhesion can be obtained. The volume percentages in cases containing bainite are explained below. With a bainite content of not less than 2% by volume, the bainite phase can be used to increase strength; and the coexistence of the bainite phase and the austenite phase can promote the stabilization of austenite, and the results can be used to obtain high n values . Further, the phase is substantially small, which can also contribute to plating adhesion during heavy-duty processing. In particular, taking the second phase composed of austenite | as an example ', by controlling the percentage of bainite volume to be not less than 2%, the balance between the adhesion and ductility of the ore can be further improved. On the other hand, when the bainite is formed, the ductility is poor when it is excessive, so the volume percentage of the bainite phase is limited to not more than 47%. In addition to the foregoing, it contains one or more of carbides, nitrides, sulfides, and oxides with a content of not more than 10/0 volume ratio as the microstructure of the rest of the paper. Α4 specifications (210X297 mm) — '-

Order (Please read the precautions on the back before filling this page) 573021 A7 __B7 V. Description of the invention (28) The steel plate of (28) may also be included in the steel plate used in the present invention. Here, the microstructure of each phase, ferrite, bainite, austenite, martensite, interface oxide layer and other structures can be identified, observed, and the average particle size (average circle equivalent particle size) can be By using a potassium nitrate reactant or the reactant disclosed in Japanese Patent Laid-Open No. S59-219473, the cross section of the rolling direction and the transverse direction | insect engraved steel plate, and the use of an optical microscope at a magnification of 500 to 1,000 times Quantitative measurement of magnification observation section. Occasionally, it is difficult to observe the case of the martensite particle size with an optical microscope. In this case, the average circle-equivalent particle size can be obtained by observing the martensite segment boundary, the packet boundary, or its aggregates, and measuring the particle diameter using a scanning electron microscope. Furthermore, the scanning electron microscope and transmission electron microscope were used to observe the shape of the grain boundary oxide layer, and to identify the interface between the mineral coating and the substrate layer, and the observation was not less than 20 at a magnification of not less than 1,000 times. The depth of field of view and the maximum value are identified, and the maximum depth is measured. The average particle size control is defined as the value obtained by observing objects with not less than 20 fields of view in accordance with the prescribed procedure using the aforementioned method. The plating layer is explained as follows. The aluminum content of the better-quality coating is controlled to 0.001 to 0.5% by mass. The reason is that when the content of Shao is less than 0.001% by mass, scum is significantly formed and a good appearance cannot be obtained; and when aluminum is excessively added at 0.5% by mass, the alloying reaction is significantly suppressed and it is difficult to form hot dip alloying. Galvanized layer. The reason for setting the content of the bell layer basin in the range of 0.001 to 2% by mass is that in this range, no plating defects will not occur, and a good appearance plating 31 can be obtained (please read the precautions on the back before filling this page) This paper is suitable for financial standards _ home standard (⑽Α4 size), 573021 A7 _____ B7_ 5. Description of the invention (29) Coating. When the content of manganese exceeds 2% by mass, the manganese-zinc compound precipitates in the plating bath and is captured in the bond layer. As a result, the appearance is significantly deteriorated. (Please read the precautions on the back before filling out this page.) In addition, when spot welding and coating properties are particularly required, these properties can be improved by applying alloying treatment. In particular, after the steel plate is plated in a galvanizing bath, after applying alloying treatment at a temperature of 300 to 550 ° C, iron is taken into the plating layer, and high-strength heat with excellent coating properties and spot weldability can be obtained ^: Galvanized zinc Steel plate. When the iron content after the alloying treatment is less than 5% by mass, the spot weldability is insufficient. On the other hand, when the iron content exceeds 20% by mass, the adhesion of the plating layer itself deteriorates and the plating layer is damaged, peeled, and sticks to the crystal grains during processing, causing defects during forming. Therefore, when the alloying treatment is applied, the iron content of the ore coating is set to a range of 5 to 2000/0 mass ratio. It was also found that the plating layer contained Ca, Mg, Si, Mo, W, Zr,

Cs, Rb, K, Ag, Na, Cd, Cu, Ni, Co, La, T1, Nd, Y,

One or more of Be, Cr, Pb, Hf, Tc, Ding Ge, Ta, v & B can suppress non-plating defects. , ΦΜ, Here, although there is no special regulation on the deposition amount of the plating, from the viewpoint of corrosion resistance, the deposition amount on the better side is not less than 5 g / mm2. Although the upper layer plating is applied to the hot-dip galvanized steel sheet of the present invention to improve the wettability of the coating properties, various treatments such as chromate treatment, phosphate treatment, lubrication improvement treatment, and weldability improvement treatment can be applied. The hot-dip galvanized steel sheet of the present invention does not depart from the scope of the present invention. As for the impurities of the plating layer, manganese is an example. When the manganese s of the plating layer rises above the ordinary concentration of impurities, almost no plating defects occur. However, due to the limitations of the current plating equipment, it is difficult to increase the A4 size of the plating layer. Χ29 · --7- ~-573021 A7 B7 V. Description of the invention (30 minutes content. Therefore, the present invention allows the manganese content to be less than 0.001% by mass ratio, which is within the impurity element concentration range and is a steel plate among them There is a minimum amount of no plating defects, and the invention of surface defects can be obtained even if manganese is not intentionally added to the plating bath. The following elements are specified in the following range: Ca: o.oo ^ oi〇 / 〇, Mg: 0.00m% 'Si: 0.00U0.i〇 / o, M〇: 0.00U0.i〇 / o, w: 0.001 to 0.1%, Zr: 0.001 to 0.1%, Cs: 0.001 to 0.10 / 0, Rb: 0.001 to 0.1%, K: 0.001 to 0.1%, Ag: 0.001 to 5%, Na: 0.001 to 0.05%, Cd: 0.001 to 3%, Cu: 0.001 to 3%, Ni: 0.001 to 0.5%, Co : 〇〇〇〇1 to 1%, La: 〇〇〇1 to 〇〇〇 / 〇, T1: 〇〇〇〇1 to 8% 'Nd: 〇 〇01 to 01〇 / (), γ: 〇〇 〇1 to 〇1%, In: 0.001 to 5%, Be: 0.001 to 〇 ″ 〇 / 〇, Cr: 〇〇〇〇〇〇〇〇〇〇〇, 〇: pb: 〇〇001 to 1% , Hf: o.ooi to 〇i〇 / 〇, Tc: 0.0001 to 〇1%, Ti: 〇 to 〇1%, Ge: 0.001 to 5%, Ta : 0.001 to 0.1%, V: 0.001 to 0.2%, and B: 0.001 to 0.1% by mass. The reason is that in each range, no ore-covering defects are suppressed, and a plating layer having a good appearance is obtained. When each When the elements exceed the respective upper limits, scum containing each element is formed, and the plating appearance is significantly deteriorated. Next, the reason for limiting the composition range of the steel sheet of the present invention will be explained. The addition of carbon elements is to ensure sufficient strength and extension in a well-balanced manner. Properties, the volume percentage of the second phase is required. Especially when the second phase is composed of austenite, carbon not only contributes to the volume percentage, but also greatly improves stability and ductility. In order to obtain strength and the second phase The volume percentage is ratio, the lower limit is 0.0001. The mass ratio, the upper limit is set to 0.3% by mass 33 (Please read the precautions on the back before filling this page) • Ordering 丨 This paper size applies Chinese national standards (CNs ) A4 specification (210 X 297 public love) 573021 A7 B7 V. Description of the invention (31) The ratio is used as the upper limit to maintain the solubility. The addition of Shi Xi element is intended to accelerate the formation of ferrite and ferrite composition Phase and to suppress the formation of carbides, resulting in the formation of carbides of the balance between strength and ductility inferior, the lower limit is 〇〇ι stone Xi% by weight. In other respects, the addition of a large amount has an adverse effect on the properties and wettability of the mine. In addition, because carbon accelerates the formation of an internal grain boundary oxide layer, it is necessary to suppress the content to a low concentration. Therefore, the upper limit is set to 2.5% by mass. In particular, when carbon is present, scale defects and the like become a problem, rather than strength, which is judged to be equal to 0.001% by mass. This content is in a range that does not cause operational problems. The addition of manganese is not only used to control plating wettability and plating adhesion, but also to improve strength. In addition, a junction is added to suppress the formation of carbides and pearlite. The precipitation of carbides and the formation of pearlite cause deterioration in strength and ductility. For this reason, the content of manganese is set to not less than 0.001% by mass. In this regard, because manganese retards the transformation of bainite, when the second phase is composed of austenite, the transformation of bainite promotes the improvement of ductility and the deterioration of weldability caused by manganese, so the upper limit of manganese is set to 3 % Mass ratio. Shao can be effectively used to control the plating wettability and plating adhesion. Aluminum can also accelerate the transformation of bainite, especially when the second phase is composed of austenite, the transformation of bainite can promote the improvement of ductility. Aluminum can also improve the balance between strength and ductility. Furthermore, aluminum can effectively inhibit the formation of grain boundary oxides in the silicon system. Therefore, the amount of aluminum added is set to not less than 0 000 丨% by mass. In terms of it, the excessive addition of aluminum significantly contributes to the inferiority of the weldability and the wetness of the ore cover, and significantly inhibits the synthesis reaction. Therefore, the upper limit of aluminum is set to 4% by mass. Public love)

34 573021 A7 ---------- B7 V. Description of the invention (32) "-1 force 1 mesh to suppress the generation of carbides and bodies that cause the balance between strength and ductility to deteriorate. Molybdenum is An important element to ensure a good balance between strength and mildness under mild heat treatment conditions. Therefore, the lower limit of molybdenum is set at —Berry ratio. In addition, excessive austenite is added to generate residual austenite, which lowers ferrite and hardened ferrite, resulting in deterioration of ductility. Therefore, the upper limit is set to 5% and preferably 10/0. 8 Ca Ti Y, Ce and Rem and other elements are added to suppress degradation and cover / ',,, / 闰 (' production, fatigue resistance, and corrosion resistance of the silicon-based internal grain boundary oxidation, S production, so other elements are not the same The grain-boundary oxides are produced like oxides in the stone evening series, but relatively small oxides can be generated in a dispersed manner, so the oxides of these elements do not adversely affect fatigue resistance. Further, because these elements inhibit silicon The formation of the internal grain boundary oxide layer reduces the depth of the internal grain boundary oxide layer. These elements can contribute to the extension of the fatigue life. The addition of-or multiple elements can be added, and the total amount is set to be not less than G. .GGG1%. In its aspect, the excessive addition causes poor productivity such as cast scallop and hot workability and poor ductility of the finished steel product, so its upper limit is set to 1% by mass. In addition, the steel according to the present invention contains Cr, One or more of Ni, Cu, Co, and W is aimed at improving strength. Chromium is an element added to increase strength and suppress carbides. The amount of chromium added is set to not less than 0.001% by mass. But Adding more than 25/0 quality 1 ratio will adversely affect the workability, so this value is used as its upper limit. The nickel content is determined to be not less than 0.001% by mass ratio to improve the scooping properties and strength 。But its addition amount exceeds 10% mass ratio to processability -_____ 'This paper size applies Chinese National Standard (CNS) Α4 specification (210X297 公 宝)-

• Yes (Please read the precautions on the back before filling this page) 573021 A7 B7 V. Description of the invention (33) Adverse effects, so this value is used as the upper limit. The copper content is not less than 0.001% by mass to improve strength. However, Gangtian (please read the precautions on the back before filling this page). The addition of more than 5% by mass will adversely affect the workability, so this value is used as the upper limit. The added amount of cobalt is not less than 0.001% by mass ratio, and is used to improve the balance between strength and ductility by controlling the plating H 夤 and bainite transformation. The upper limit is not particularly limited, but it is not economical to add a large amount of cobalt because of its high price. Therefore, it is desirable to set the amount of cobalt to be no more than 5% by mass. The reason why the iron content is determined to be in the range of 0.001 to 50/0 mass ratio is that the strength improvement effect is exhibited when the content is not less than 0.0001% by mass ratio, and the addition of more than 5% by mass ratio adversely affects workability. . 、 May | In addition, the steel according to the present invention may contain Nb, Ti, V, Zr, Hf &

One or more of Ta, these elements are strong carbide-forming elements, and the goal is to further increase the strength. These elements form fine carbides, nitrides, or carbonitrides and are extremely effective at strengthening steel sheets. Therefore, it is judged that these elements are added as required, and the added amount is not less than 0.001% by mass. On the other hand, since these elements deteriorate ductility and prevent carbon from being concentrated in retained austenite, the upper limit of the total amount of these elements is set to 1% by mass. If necessary, boron may be added. The added amount of boron is not less than 0 0001% by mass ratio, which can effectively strengthen the grain boundary and steel. However, when the added amount exceeds 0.1% by mass, not only its effect is saturated, but also the strength of the steel sheet is increased more than necessary, resulting in poor workability. Therefore, the upper limit is set to 0.001% by mass. The reason why the content of the dish is determined from 0.0001 to 0.3% by mass is because

573021 A7 B7 V. Description of the invention (34) The strength enhancement effect appears when the phosphorus content is not less than 0.0001% by mass. Ultra-low phosphorus has economic disadvantages, and the addition amount exceeds 0.33% by mass due to the weldability during casting and hot rolling and Productive effects. The reason that the sulfur content is determined to be 0.0001 to 0.1% by mass is that the ultra-low content of sulfur, which is lower than the lower limit of 0.0001% by mass, is economically unfavorable. The added amount exceeds the mass ratio of 〇 · ΐ%. Sex and productivity. P, S, Sn, etc. are unavoidable impurities. It is desirable that the phosphorus content is not higher than 0.05%, the sulfur content is not higher than 0.01%, and the tin content is not higher than 0.00% by mass. It is well known that particularly small amounts of phosphorus can effectively improve the balance between strength and ductility. The manufacturing method of the high-strength hot-dip galvanized steel sheet having the foregoing structure will be described later. When the steel sheet of the present invention is manufactured by processing such as hot rolling, cold rolling, and annealing, the slab adjusted to the specified composition is cast or cooled after casting, and then heated and heated at a temperature not lower than 1,180 ° C again. . At this time, it is desirable to set the heating temperature again to not lower than 1,15 (TC, or higher than 1,10 (rc) to inhibit the formation of grain boundary oxide layers. When the reheating temperature becomes extremely high, the oxidized scales tend to It is relatively uniformly formed on the entire surface, so that the grain boundary oxidation is easily suppressed. However, when the temperature is over 1,250 ° C, the local temperature accelerates the abnormal oxidation, which is the upper limit. Low temperature heating delays the formation of the oxide layer itself. In addition, in order to suppress the formation of excessive internal oxidation, it is determined that the paper size is not less than 88. Chinese national standards (CNs) A4 specifications (210 X 297 mm) are applicable (please read the precautions on the back before filling this page).丨 37 ^ / 3021 A7 ~ _ 5. Description of the invention Hot rolling is completed at (35) ° C. It is better to reduce the oxidation depth of the grain boundaries of the product by using a high-pressure scale removal device or applying heavy pickling after hot rolling. Surface flakes. Therefore, the steel sheet is then cold rolled and annealed to obtain the final product. In this example, the common hot rolling finishing temperature is controlled to be not lower than the Α ° transformation temperature, which is determined by the chemical composition of the steel product. If the temperature is at most lower than A. by about 10.0, the properties of the final steel sheet will not deteriorate. However, the hot rolling finishing temperature is set to not higher than 丨, 丨 〇〇 to prevent the formation of a large number of oxidized scales. Further, by cooling Controlling the coil temperature to a temperature not lower than the bainite transformation start temperature (this temperature is determined by the chemical composition of the steel) can avoid increasing the load beyond the load required during cold rolling. However, this situation is not suitable for cold rolling In the case where the total thinning rate is low, even if the steel sheet is coiled at a temperature not higher than the bainite transformation temperature of the steel, the properties of the finished steel sheet will not deteriorate. Moreover, the total thinning rate of cold rolling is determined by the final thickness The relationship with the cold rolling load determines that as long as the total thinning rate is not less than 40%, preferably 50%, the oxidation depth at the grain boundary can be effectively reduced, and the properties of the finished steel sheet will not deteriorate. During the annealing process after cold rolling , When the annealing temperature is lower than O-lxiAq-AcO + AcifC) value, the value is based on aCi temperature and Ac3 temperature table (for example, refer to "Tekko Zairyo Kagaku": WCLeslie, supervised translation: Nariyasu Koda, Maruzen Corporation, page 273 ) And It is determined by the chemical composition of the steel. 'The amount of austenite formed during annealing is small, so that residual austenite or martensite cannot remain in the finished steel sheet, so this value is determined as the lower limit of the annealing temperature. Here, the higher the annealing temperature, the larger the grain size. The formation of the boundary oxide layer is more accelerated. The formation of the grain boundary oxide layer is accelerated due to the annealing at the south temperature, and ----——----___ This paper size applies the Chinese National Standard (CNS) A4 specification (21〇χ297 Mm) _

Order 丨 (Please read the notes on the back before filling this page) 573021 A7 ------ B7 V. Description of the invention (36) The production cost is increased, so the upper limit of the annealing temperature is determined to be Ac3-3〇rc). In particular, the closer the annealing temperature is to AC3 3α), the faster the formation of the grain boundary oxide layer. In this temperature range, in order to balance the steel plate temperature and obtain austenite, the annealing time is required to be not less than 1 () second. However, when the annealing time exceeds 30 minutes, the formation of the daily grain boundary oxide layer < accelerates and the cost increases. Guzhang's upper limit is set at 30 minutes. Subsequent cooling is important for accelerating the transformation from the austenite phase to the ferrite phase and stabilizing the austenite before the carbon is concentrated in the austenite phase before the transformation. When the maximum temperature during annealing is defined as Tmax (), a cooling rate lower than Tmax / 1,000 ° C / sec results in manufacturing defects, resulting in a longer production line and a significant decrease in production rate. On the other hand, when the cooling rate exceeds Tmax / l0t / s, the transformation of ferrite is insufficient, and it is difficult to obtain a retained austenite 'high-carbon phase such as martensite transformation in the finished steel sheet. ¥ The maximum surface temperature during annealing is defined as TmaxCC). When the primary cooling system is performed below Tmax-20 ° t: at the temperature, pearlite is generated during cooling, while ferrite is not sufficiently generated, so this temperature is determined as the lower limit. However, when the primary cooling ends at a temperature exceeding Tmax-10 (rC), the ferrite deformation is insufficient, so this temperature is determined as the upper limit. The cooling rate lower than 0 · 1 ° C / sec causes the formation of grain boundary oxide layers. Acceleration, resulting in unfavorable manufacturing, resulting in a longer production line and a significant reduction in production rate. Therefore, the lower limit of the cooling rate is set to 0 · 丨 ° c / s. In terms of it, when the cooling rate exceeds 10 ° C / s, the ferrite deforms Insufficient, it is difficult to obtain retained austenite in the finished steel plate, and the high-carbon phase such as martensite is rich in transformation, so the upper limit is set to 10C / sec. This paper size is applicable to the Chinese National Standard (CNS) A4 specification (21〇 > <; 297 mm) 39 ........ MW ........ Order ... ........ 0 ^. •-«(Please read the notes on the back before filling out this page) 573021 A7 -----——______ B7_ V. Description of the invention (37) When the primary cooling is performed to a low temperature At 650 ° C, pearlite is produced during cooling, and the carbon element that stabilizes the austenite is consumed, and eventually a sufficient amount of residual austenite cannot be obtained, so the lower limit is set to 6500c. However, when the cooling stops beyond ° C temperature When the ferrite transformation is insufficient, the growth of the grain boundary oxide layer is accelerated, so the upper limit is set to 71 (rc.) When the rapid cooling is followed by the secondary cooling, the cooling rate is not less than o.rc / Second, it is preferably not less than rc / second, and no pearlite transformation 'iron carbide sinking, etc. will occur during cooling. However, from the perspective of equipment capacity, it is difficult to achieve a cooling rate exceeding looc > c / second, so Decide the cooling rate from 01 to 100. (: / sec and preferably in the range of 0 to 100 ° c / sec. When the cooling end temperature of the secondary cooling is lower than the plating bath temperature, an operation problem occurs; and when it exceeds the plating bath At a temperature of +50 to +10 (rc), carbides precipitate in a short period of time, so sufficient retained austenite and martensite cannot be obtained. Therefore, the cooling end temperature of the secondary cooling is set at the galvanizing bath temperature. To the temperature of the galvanizing bath +50 to 100 ° c. It is better to maintain the steel plate at this temperature range for not less than 1 second, including the time of immersion plating in the plating bath, in order to obtain the operating stability of the steel plate, Accelerate the formation of bainite as much as possible, Cover wettability. When the maintenance time becomes longer, it will adversely affect productivity and generate carbides, so it is better to limit the maintenance time to not more than 3000 seconds (except for the time required for annealing treatment). In order to stabilize at room temperature The austenite phase needs to increase the austenite carbon concentration through the transformed part of the austenite phase to become the bainite phase. In order to accelerate the transformation of bainite, including the transformation of the alloying process, steel 40 (please read first Note on the back, please fill out this page again) This paper size applies to China National Standard (CNS) A4 (210X297 mm) 573021

V. Description of the invention (38) The plate is maintained at a temperature range of 300 to 550 C for 1 to 3,000 seconds and preferably 15 seconds to 20 knives. When the temperature is lower than 3000c, bainite transformation hardly occurs. But when the temperature exceeds 550. (: At this time, carbides are formed, and it becomes difficult to sufficiently retain the retained austenite phase. Therefore, the upper limit is set to 55 (rc.) In order to form a martensite phase, bainite transformation is not required. The phase case is different. In this respect, like the retained austenite phase, the formation of carbides and pearlite phases must be suppressed, so after the secondary cooling, an alloying treatment must be applied to the knife, and the alloying treatment is determined to be 300 to 55. 0 ° and preferably at a temperature of 400 to 550 ° C. In order to obtain a prescribed amount of oxide at the interface, the degree of foxness and processing history in the hot rolling stage need to be controlled. First, it is necessary to produce a uniform surface as much as possible through the following methods Oxidation layer: Control the heating temperature of the slab at 1,150 to 1,230. (:; Up to 1,000.) (: The thinning rate is not less than 50%; the finishing temperature is not less than 8500, and preferably not more than Below 880 ° C; and coiling temperature not more than 65 (Γ (:, while leaving as much titanium,! Lu and other elements as possible in the solid solution g to suppress the formation of stone oxide oxides during annealing. In addition, it is hoped that After finishing rolling, use high-pressure descaling flakes or Pickling to remove the oxide layer formed during hot rolling as much as possible. It is also desirable to use a roller with a diameter not larger than _〇 亳 米 to break the oxide produced to control the cold rolling reduction rate not less than 3G%. Subsequent annealing In the process, the steel plate needs to be heated at a rate of 5 ° C / second to a temperature range of not less than 75 generations in order to accelerate the formation of other oxides by inhibiting the formation of silicon dioxide. In terms of it, when the annealing temperature is high or annealing Over time, a variety of oxides are generated, and workability and fatigue resistance are degraded. Therefore, according to item (33), as determined by the present invention, the dwell time that needs to be controlled at the annealing temperature is not more than 60 minutes. Applicable to China National Standard (CNS) A4 (21〇 > < 297) (Please read the precautions on the back before filling this page)

41 573021 A7 B7 V. Description of the invention (The highest temperature of 39 is in the range of not less than 0.1x (AC3_Aci) + Aci () to not more than Ac3 + 30 (° C). Examples The following will explain the invention based on examples. The details are as follows. Example 1 of the specific embodiment 1 will be described later based on specific examples 丨 examples 丨 further details of the present invention. The steel having the chemical composition shown in Table 1 is heated to a temperature of 1,200 ° C; hot rolling of the steel It is completed at a temperature not lower than the Ah transformation temperature; the hot-rolled steel sheet is cooled and then coiled at a temperature not lower than the bainite transformation start temperature. The bainite transformation start temperature is composed of various steel chemistry Decided, then pickled and cold rolled into cold rolled steel sheet with a thickness of 1.0 mm. The steel M-1, N-1, 0-1, p_i and Q- 丨 (detailed later) are up to 1000 ° C. Thinning rate 70%, finishing temperature 900 ° C and coiling temperature 700X: hot rolled under conditions of cold rolling using a roller with a diameter of 800 mm at a 50% thinning rate. Other steels are based on Yuda 1, 〇〇〇 ° C 70% thinning rate, 900 ° C finishing temperature and 600 ° C coiling temperature under the conditions of hot rolling, and using a 1,200 mm diameter roller at 50% The thinning rate is cold rolled. (Please read the precautions on the back before filling in this page) Order-ί · ^ Γ This paper size applies the Chinese National Standard (CNS) A4 specification (210 > < 297 mm) 42 573021 Description Fat five \ ^ / 40 Α7Β7 (lHV) f 蚪 »擗 ~ Weng discriminate bismuth ΕΕ- masculinity is difficult 1 ~ 柰 丰 〇ms R s 〇ο 1 X 〇 " T1 m α η CO > Steel code 0.23 0.06 0.02 0.28 0.25 0.12 0.09 〇 k> 0.21 0.19 0.17 0.19 0.13 0.14 0.25 0.09 0.18 0.08 0.21 0.11 0.13 0.16 η 0.01 0.52 0.75 4.56 0.05 0.45 0.01 0.08 0.04 0.19 0.78 2.32 K) K) 0.01 〇00 〇OO 〇 〇α 〇Μ 2.61 2.98 0.52 2.56 1.85 E 1.51 ON κ > 0.98 k) KJ \ $ U) U \ u > Os u > • κ) to 0.97 s Μη 0.04 0.05 0.63 0.03 0.03 0.75 0.46 1.15 Μ 0.99 〇 〇 \ j \ 0.96 k) U) 1.63 0.03 0.05 lyi K) 0.62 i 1.41 〇U) 5.32 0.26 0.11 0.13 0.11 0.12 0.07 0.12 0.07 0.05 0.11 0.13 0.22 0.16 Mo 0.023 0.0015 0.0008 0.001 0.0005 0.007 0.003 0.64 0.008 0.005 0.001 Rem Κ) U) 0.11 〇 ο U) 〇bo 0.84 ζ 〇4 ^ ο 0.15 ο 〇 0.015 Η 0.022 2: CT 0.03 < 0.15 0.000 D0 0.01 Ν 0.005 X 0.01 0.25 0.05 0.02 0.02 0.01 0.02 0.01 0.01 0.015 0.01 0.007 0.012 0.005 0.02 0.04 0.01 0.01 0.02 0.02 0.01 0.025 0.015 0.01 0.01 0.02 0.002 0.005 0.004 0.004 0.003 0.002 0.003 0.003 1 0.002 0.001 0.002 0.002 0.002 0.001 0.002 0.003 0.004 0.005 0.003 0.002 0.006 0.004 0.005 0.00 Comparative steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel, invented steel Remarks on the steel of the present invention (please read the back first Note: Please fill in this page again.) This paper size applies the Chinese National Standard (CNS) A4 specification (210X297mm). 43. 5. Description of the invention (41) Then calculate the Aq conversion from the composition (mass percentage) of various steels according to the following formula. Shape temperature and Ac3 transformation temperature:

Aci-723-10.7xMn% + 29.1xSi% »

Ac3 = 910-203x (C〇 / 〇) '-+ 44.7xSi〇 / 〇 + 31.5xMo〇 / 〇-3〇xMn〇 / 〇. LlxCr% + 400xAl%. The plating method of the steel plate is: 5. (] / Second heat the steel plate to the annealing temperature determined from Ac, transformation temperature and Ah transformation temperature, maintaining the steel plate in a nitrogen atmosphere containing 10% hydrogen; then cool to 600 to 70 (TC at a cooling rate of seconds) ; Continuous cooling to a plating bath temperature at a cooling rate of 1 to 2 (TC / sec); and immersion plating of the steel sheet in a 4601 galvanizing bath for 3 seconds, in which the composition of the plating bath is different. In addition, as for the iron-zinc alloying treatment, some After plating, the iron content of the plating layer is adjusted to 5 to 20% by mass, and the steel plate is maintained for 15 seconds to 20 minutes at a temperature range of 300 to 5501. The plating properties are visually observed on the surface scum tangled state and The area of the unplated part was measured and evaluated. The composition of the plating layer was determined by dissolving the plating layer in a 5% hydrochloric acid solution containing an inhibitor and chemically analyzing the solution.

A jIS # 5 test piece for a tensile test was prepared from a plated steel plate (rolled through the skin at a thickness reduction ratio of 0.5-2.0%), and its mechanical properties were measured. Further, due to the plane bending fatigue test, a stress corresponding to 50% tensile strength was added to relatively evaluate the fracture resistance life. The corrosion resistance was evaluated by repeated salt spray tests. As shown in Table 2, according to the steel of the present invention, the grain boundary oxide layer has a shallow depth, and the fatigue life at a stress corresponding to 50% of the tensile strength exceeds a bending cycle of 106. Further, the balance between strength and elongation is good, no generation of rust is observed, and a good appearance is obtained even after the test. Q This paper size is suitable for financial _ home standard (_ A4 ^ (21〇x29 ^ J7 573021) 1/42 A7B7

(Speaking) τ ^^^ ~ Weng Zhuan Bi Wei Εί-Astringent edge is difficult Θ Λ Zongfeng. (Stone Treasure) "4.55E-03" > 4.55 × 10-Γ Potted Miscellaneous 100%-溆 涞 鎞 鎞 耩 耩 耩 耩 萍 耩 耩 聆 聆 窆 嵙 嵙 嵙 会 ##--Μ---- X Ο 〇W mmmmm Ό U 〇〇C0 CO CD > > > Steel code Lh I μ—4 1--Κ)-κ >-K) IK) 1 N «*-to — K)-U) K) — u > K) One process number punch 1 punch 1 piece to punch 1 Q > 1 punch 1 ㈣ No rust is generated No rust is not generated No rust is not generated No rust is not generated No rust is not generated rust is not generated No rust generated No rust generated No rust generated No rust generated No rust generated No rust generated No rust generated I No rust generated | I no rust generated | No rust generated I No rust generated Generated rust | No generated rust No generated rust No generated rust After repeated salt spray test 0.25 0.28 〇U) 0.35 〇U) 0.42 0.05 2 0.07 0.08 0.09 0.35 0.33 〇 • K) 0.24 〇IkJ 0.23 0.08 0.11 0.56 0.15 i 0.13 0.09 0.85 0.07 0.05 Grain Boundary Oxide Depth / μm Ferrite Ferrite | Ferrite Ferrite Ferrite Ferrite Body 1 Ferrite I 1 Ferrite I 1 Ferrite 1 | Ferrite | Ferrite J | Ferrite | Ferrite | | Ferrite | | Ferrite | I Ferrite I ί Ferrite y _ oxygen Zhao] I Ferrite II Ferrite II Ferrite I | Ferrite | I Ferrite | I Ferrite | Ferrite | I Ferrite | I Ferrite | I Ferrite | Main phase type VO s〇U) 00 s〇VD U) U) νο Κ) SU) S) s U) ο 〇U) 93.5 〇95.5, * ρ ON 〇 On KJ \ OS Os 〇- U \ OS to Μ K > U) 00 〇〇K) 〇 Average particle size of main phase / micron 4.17E-02 4.67E-02 5.00E-02 7.00E-02 5.00E-02 8.40E-02 8.33E-03 1.10E-01 1.00E-02 8.89E-03 9.00E-03 8.20E-02 3.89E-02 3.00E-02 2.22E-02 2.67E-02 3.00E-02 2.56E-02 1.60E-02 1.83E -02 2.07E-02 1.25E-02 4.57E-02 1.63E-02 1.13E-02 3.40E-02 7.78E-03 4.55E-03 παΓ π5 〇〇〇 〇 〇〇〇 One-〇On 〇〇 00 -J 100- 〇〇〇〇Martensite volume percentage /% ON ON On ON Os II U) ο 〇〇〇〇〇〇〇〇〇 00 〇Lh% of austenite volume /% 810 800 795 825 790 815 630 635 670 675 630 620 615 615 615 620 610 Os L / \ 825 795 435 555 600 590 595 520 560 Os LTi Technical strength / MPa U) 〇U > U) U) ON U) U) U) U) U) U) U) U) U) κ > 00 U) U) Price U) U > Elongation /% 1.03E + 06 1 1.15E + 06 1.20E + 06 1.01E + 06 1 1.20E + 06 1.00E + 06 2.00E +06 1.85E + 05 1.60E + 06 1.70E + 06 2.01E + 06 2.70E + 05 1.20E + 06 1.10E + 06 1.40E + 06 1.50E + 06 1.10E + 06 1.90E + 06 1.07E + 06 1.20E + 06 3.60E + 05 1.10E + 06 1.59E + 05 1.17E + 06 1.01E + 06 3.20E + 05 1.45E + 06 1.23E + 06 The invention steel | The invention steel The invention steel The invention steel Inventive steel Inventive steel Inventive steel Inventive steel Inventive steel Inventive steel Inventive steel Inventive steel comparative steel | Inventive steel | Inventive steel | Inventive steel | Inventive steel Inventive steel | Inventive steel | Inventive steel I Inventive Steel I | Comparison Steel | | Inventive Steel | 1Comparison Steel | lInventive Steel l 1Inventive Steel | 1Comparison Steel | | Inventive Steel | | Inventive Steel I (Please read the precautions on the back first (Fill in this page) The size of this paper applies to Chinese National Standard (CNS) A4 (210X297 mm) 45 573021 A7 B7 Description (43 (Miao provision) ^ tadpole >> Weng Pi ~ quail bismuth micro ££ - ^ 0 to weary astringent difficult cases in abundance. (Defense order J) "4.55E-03" > T1'4.55 × 10 · Γ * and pot fishing miscellaneous bismuth 100%-cone 沬 啷 1? Xue Tan 镞 intercourse with scale farmer 蕻 野 ~ jealous pot society ^^ Wear '抻 左 棼' although XCT- 棼 boro 棼 竑 琴 Η + 盘 叫 今? 1. ** P ^ Q ~ HV ^ · -Hang Dangjue Xue Xue 4 Acer Porpoises-Mixed Mπ Miscellaneous Fishing IBi ^ tb Cat Shengqin >. Buckle Qin Pian Fen-a > DD ^ Although ~ ^ ^ 捵 虽 Although the bell Zhonghu Hu Lengjin ^ race 20 rule-fresh batch MtMH® ^ God return ^ > 1? ^ 'Qin >. S 8 〇η 〇D0 〇 > 〇〇rrrr ί—1 steel code —-— — — — — —-U) 1 η- * to to Μ U) Μ 2 U) κ > — Μ treatment number w ^ (¾ Most cracks occur during cold rolling. Most cracks occur during hot rolling. Rust is generated, rust is not generated, rust is not generated, ore is not generated, rust is not generated, rust is not generated, rust is not generated, ore is not generated, bond is not generated, rust is not generated, rust is not generated. Rust | No rust formation 1 No rust formation No rust formation No rust formation No ore formation No formation rust formation No rust formation No appearance after repeated salt spray test OS 0.65 0.07 0.25 0.08 0.02 0.03 0.03 0.05! 0.06 0.04 0.07 0.04 0.04 0.05 0.04 0.05 〇0.65 Grain boundary oxide depth / micron ferrite bainite ferrite and bainite ferrite and bainite ferrite ferrite ferrite ferrite ferrite Ferrite | Ferrite | | Ferrite 1 | Ferrite | | Ferrite | | Ferrite I Ferrite | Ferrite I | Ferrite I | Ferrite I Ferrite Ferrite | Ferrite | Main phase category 〇〇〇 Body: 55% bainite: 37% ferrite: 65% bainite: 23% '〇 to 91.5 92.5 VO K) Ό K) 91.5 90.5 Ό 90.5 90.2 〇Ό LA S ϋ), > mw * material Dream can't measure U) 〇〇〇〇〇〇２０２Ό Ό L / 1 The average particle size of the main phase / micron 3.30E-01 Cannot measure 1.15E-01 2.33E-02 6.25E-02 8.00Ε-03 2.22E- 03 2.50E-03 3.00E-03 5.56E-03 6.00E-03 3.64E-03 4.44E-03 7.78E-03 4.00E-03 | 5.00E-03 4.00E-03 4.55E-03 1.03E-03 7.78E-03 7.22E-02 2.30E-01 1m π1 〇 | Not measurable | 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 百分比 百分比 百分比 马 马 马 马 马 马 马 马 马 马 马 %% 00 Lfi 〇0000 00 La VO 〇〇〇Austenite volume percentage /% 645 840 620 0C 790 650 675 645 590 LT \ v〇U \ 600 620 700 695 720 _1 715 700 720 590 670 2 L / ι 780 Tensile strength / MPa K) 〇K) 00 U) Ui U) U) Os U) 00 U) 00 U) 00 U) ο U) U) U) U) U) U) U) Κ) U) U) U) U) K) 〇〇 Elongation /% 1.20E + 05 7.50E + 05 9.45E + 04 2.10E + 06 2.70E + 06 2.20E + 06 2.10E + 06 2.2 3E + 06 1.37E + 06 1.07E + 06 1.10E + 06 1.07E + 06 L36E + Q6 -j 1.13E + 06 1.40E + 06 1.10E + 06 1.22E + 06 1.38E + 06 2.50E + 06 1.33E +06 1.40E + 06 3.90E + 05 Comparative steel, comparative steel, comparative steel, comparative steel, comparative steel, invented steel, invented steel, invented steel, invented steel, invented steel 1 invented steel, invented steel I, invented steel | invented steel 1Inventive steel 1 | Inventive steel | | Inventive steel | | Inventive steel | | Inventive steel | | Inventive steel | | Comparative steel | | Inventive steel | | Inventive steel | Comparative steel (please first (Read the notes on the back and fill out this page)

This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 46 573021 A7B7 V. Description of invention (44) Table 3: Plating properties of various steels Steel code treatment number Plating layer Plating layer indication Formula (1) Non-plating defects of the plating layer Repeated salt spraying Remarks Aluminum content% Manganese content% Iron content% Calculated value of other element% Appearance after test C-1 1 1 15 1.77 No rust is generated C-2 0.5 0.01 7 -4.35 Yes rust comparison steel E-1 0.05 0.5 12 7.76 No rust is not generated The present steel E-1-1 0.17 0.04 9 0.51 Si: 0.02 No rust is not generated according to the present invention steel E-1- 2 0.18 0.03 9 0.26 Y: 0.02 Nd: 0.04 No rust is not formed in the steel of the present invention E-1-3 0.17 0.03 9 0.38 La: 0.02 No is rust is not formed in the steel of the present invention E-1-4 0.15 0.02 9 0.51 B: 0.005 No The rust of the present invention steel E-1-5 0.2 0.08 9 0.63 Rb: 0.02 No The rust of the present invention steel E-2 0.25 0.01 8 -0.87 Yes the rust of the comparative steel G-1 0.3 0.3 11 2.05 No of ore Inventive steel G-2 0.2 0.01 8 -0.33 is a rust-generating steel H-1 0.5 0 .5 7 1.26 No rust is not formed in the steel of the present invention 1-1-1 0.1 0.05 7 0.63 Cs: 0.04 No ore is formed in the present invention 1-1-2 0.15 0.1 8 0.63 K: 0.02 Ni: 0.05 No ore is not formed Inventive steel 1-1-3 0.14 0.1 7 0.76 Ag: 0.01 Co: 0.01 No rust is not formed. Inventive steel 1-1-4 0.3 0.25 8 0.63 Ni: 0.02 Cu: 0.03 No Inventive steel 1--1 5 0.35 0.27 9 0.26 Na: 0.02 Cr: 0.01 No No rust was formed in the steel of the present invention 1-2 0.5 0.1 -3.74 Yes No rust was formed in comparison steel J-1 1 1 0.24 No No ore was formed in the steel of the present invention J-2 1 1 8 0.24 No rust was generated. The steel of the invention J-3 0.5 0 4 -6.02 Yes generated the wrong comparison steel K-1-1 1 0.9 0.69 Be: 0.005 No No ore of the invention steel K-1-2 0.8 0.7 0.69 Ti: 0.01 In : 0.01 No ore of the present invention steel K-1-3 0.9 0.8 0.69 Cd: 0.02 No rust of the present invention steel K-2-1 0.9 0.8 9 0.69 Pb: 0.03 No rust of the present invention steel K-2- 2 1 0.95 8 1.32 To: 0.02 No rust is not formed in the steel of the present invention K-2-3 1 0.9 8 0.69 W: 0.02 Hf: 0.02 No No is formed in the steel of the present invention L-1-1 0.3 0.15 10 0.60 Mo: 0.01 No rust is not formed in the steel L-1-2 of the present invention 0.25 0.14 10 1.10 Zr: 0.01 Ti: 0.01 No No ore is formed in the steel L-1-3 of the present invention 0.3 0.2 9 1.23 Ge: 0.01 No is not formed in ore Inventive steel L-1-4 0.3 0.15 11 0.60 Ta: 0.01 V: 0.01 No No ore was generated Inventive steel M-1 0.3 0.4 11 3.73 No No rust was formed Inventive steel N-1 0.4 0.3 11 1.23 No No rust was formed The steel of the present invention 0-1 0.5 0.5 12 2.48 No rust is formed The steel of the present invention P-1 0.1 0.3 11 4.98 No ore is formed No of the steel of the present invention Qi 0.15 0.2 10 3.10 No No of rust of the steel of the present invention (note) The balance element is zinc. The underlined numbers are conditions outside the scope of the present invention. (Please read the precautions on the back before filling this page) This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 47 573021 A7 B7 V. Description of the invention (45) It can be seen from Table 3 that even if it contains a relatively large amount In the case of a silicon steel plate, the plating layer and the steel plate composition of the steel plate of the present invention are adjusted to form no plating defects, and have good residual resistance. In addition, it should be understood that when the plating layer contains a fourth element (Table 3, “Plating Layer Other Elements”), good plating properties can be obtained even if the value calculated from the left side of the equation is small. Table 4 shows the influence of manufacturing conditions. In the case where the manufacturing conditions of the steel sheet do not meet the specified requirements, even if the composition is within the specified range, the depth of the grain boundary oxide layer is deep and the fatigue resistance can be short. It should also be understood that, on the contrary, even if the manufacturing conditions meet the specified requirements, the fatigue life is short in the case where the steel plate composition deviates from the specified range. Table 5 shows the effect of oxide shape. According to the steel sheet of the present invention, no rust is generated, and the fatigue resistance exceeds 2x106 bending cycles, so the material quality of the steel sheet is good. 0 This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) 48 (Notes to fill out this page)

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This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) 50 573021 A7 B7 V. Description of the invention (48) (Break) Weng ~ Weng 绋 bismuth 缘 Yuan Wei 8 | ~ . (Provocation) "2.23E + 6" rises by 2.23 × 1 °. 〇 > ο 〇2 瀹 t— ^ t— * »— * Η—k one hundred 00 K) LA U) Lh 5 fine 1 荠 more than Λ 〇〇Κ) LAi 〇 μ 1 & miscellaneous > m \ b Cold 00 .. 2 3 00 P 〆00 P 2 PO > u > 〆C / 5 P 2 〇P 4 00 P 2 3 〇 ΡΡ 4 Ρ F Ρ 〆to Ρ 2 〇Ρ ⑺ Ρ 2 〇P 〆in 9 minus 5 11% esf CT is not coincident 岿 > > >% > Huan > 岿 S m + ο K) Η- * Ο W + to to k) ο m + Κ) W + Κ) k) U) m + "Sand > rr 5 瀹 卄 ♦ 瀹 φ 1 squat · 瀹 瀹 (Please read the precautions on the back before filling this page)

This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 51 573021 A7 _____ B7_ V. Description of the invention (49) Specific embodiment 1 Example 2 The details of the present invention will be explained based on specific embodiment 1 Example 2 as follows . The steel having the chemical composition shown in Table 6 is heated to a temperature of i, 200 ° C; the hot-rolled steel sheet is finished at a temperature not lower than the transformation temperature of Ar3; The coiling, pickling and cold rolling of the temperature at the start of the transformation (determined by the chemical composition of various steels) become cold rolled steel with a thickness of 1.0 mm. Then calculate the Ari transformation temperature and Ar3 transformation temperature from the composition (mass percentage) of various steels according to the following equation:

Aci = 723-l0.7.7xMn% + 16.9xNi% + 29.1xSi% + 16.9xCr%, Ac3 = 910.203x (C%) 1/2 + 15.2xNi% + 44.7xSi% + 104xV% + 3 1 · 5χΜο% -30χΜη% -11 xCr% -20xCu% + 700xP% + 400xAl% + 400xTi%. The plating method of the steel plate is: the steel plate is heated to the annealing temperature obtained from Ac i transformation temperature and Ac; the transformation temperature is maintained under a nitrogen gas containing 10% hydrogen, followed by 0.1 to 10 ° C Cooling rate per second to 680 ° C; continuous cooling to a plating bath temperature at a cooling rate of 1 to 20 ° C / second; and immersion plating of the steel plate in a galvanizing bath at 460 ° C for 3 seconds, in which the plating bath composition Different. Further, as an iron-zinc alloying treatment, after some steel plates are galvanized, the iron content of the ore-coated iron is adjusted to 5 to 20% by mass, and some steel plates experience 15 seconds to 20 in a temperature range of ⑽0 to "ο ° C. Min. By visually observing the surface of the floating tangled evil and measuring the area of the uncoated part, the properties of the cladding are evaluated. The quality of the ore coating is applied by dissolving the plating layer in a 5% hydrochloric acid solution containing an inhibitor. China National Standard (CNS) A4 specification (210X297 mm) (Please read the notes on the back before filling this page), OK | 52 573021 A7 ------ —__ B7 V. Description of the invention (50) and chemistry The analysis solution is determined. A jIS # 5 test piece for a tensile test is prepared from a galvanized steel sheet (rolled through the skin at a thickness of 0.5-5 2%), and the mechanical properties are measured. Then 20% resistance is provided. After the strain is applied, the steel sheet is subjected to heavy bending and reverse folding to evaluate the plating adhesion after severe deformation. After bending and reverse folding, the vinyl tape is pasted to the bent portion and the tape is peeled off, and then the length per unit is measured. Ratio of peeling Plating adhesion. The manufacturing conditions are shown in Table 8. As shown in Table 7, the steel of the present invention, in other words, No. 0 to No. 8 (No. 1 '2, No. 5 to No. 8, No. 10 to No. 14) was taken as an example, and no plating was observed. Covering defects, the balance between strength and elongation is good, even if bending and reverse folding are performed after providing 20% tensile strain, the peeling rate of plating is less than 1%. In terms of comparative steel, that is, C1 to c 5 (numbers 17 to 21), a large number of cracks were generated during the hot rolling of the test piece, and the productivity was poor. After removing the cracks from the hot-rolled steel sheet obtained by grinding, the hot-rolled steel sheet was cold-rolled and annealed, and then used for material quality Test. However, some steel plates (C2 and C4) have extremely poor plating adhesion or cannot withstand 20% forming after heavy-duty processing. As shown in Table 8, Nos. 3, 9, 19, and 21 do not satisfy Equation 1. The shovel has poor wettability and poor plating adhesion after reverse phase deformation. In addition, the microstructure of the steel plate does not meet the requirements, and the plating adhesion after heavy-duty processing is poor. Take No. 4 as an example, Due to the slow secondary cooling rate, no martensite and austenite are produced, but pearlite is produced instead. Heavy-duty processing Subsequent plating adhesion is not good. This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) 53 (Please read the precautions on the back before filling this page)

573021 Α7Β7 V. Description of the invention (51) 楸 -e-T ^ a 笳 婵 1111 > Deer & 2 G Ο § 5 σ σ \ SSS σ steel code 0.15 0.08 0.05 0.27 0.42 0.05 0.07 0.22 p H—a H— ^ 0.06 0.09 0.13 0.16 0.15 Ο 3.61 0.21 7.41 1.22 0.32 0.91 0.91 h— ^ Lk) 1.23 0.89 0.49 k) 1— ^ 0.48 0.45 1.32 〇〇as h— ^ Jo 2.81 1.68 1—k 〇 ON 1.09 1.49 k) Η—a Η— ^ HA 〇1—A 0.98 0.95 2 0.02 0.06 0.05 0.03 4.56 0.03 0.03 0.75 0.31 0.62 t— k Η— ^ 0.48 0.95 1.12 > 6.52 0.55 0.23 0.09 0.19 0.12 0.15 2 O μ— ^ bs U \ 0.09 p 0.74 8.54 0.42 〇c 0.08 〇3.22 0.01 z CT 0.01 H 0.005 < IS 0.0026 DO (Please read the precautions on the back before filling this page). The paper size is applicable to the Chinese National Standard (CNS) Α4 specification (210X297 mm) 54 573021 Α7Β7 5. Description of the invention (52) > 奇 屮 蚪 么 槔 » 0 bismuth radical selling disc S Wei 0 ~ Zong Feng. ** 芩 &箨; 畛 都 命 黔 ^ Gui Sight ~ Ling 7 嗍 嗍 & & ^^ Life paralysis. *** Mi Mi, vrrcr ~ ^ Bismuth 100%-nc ^ · 啷 turn on Xue Wei 耩 α Distinguish 涔 Hidden Zhu ~ ^ 窆 窆 会 耜 ^ 棼 '抻 ^ 棼' 嵙 ^ 棼 quan iridium Zhong Zai was sweating today. S 〇S Ω 〇§ g ο g § S σ S sss B σ ο D α 〇〇 Cloud M 20 VO 00 Os LTi Private U) K >-ρ 〇〇〇〇〇〇 P 〇〇 ▲ ο lh 〇 〇 Ο 〇 〇〇Ρ Ui — ο S o U) oopoosos 〇 ρ oo o ρ Aluminium content of the coating% 〇〇P 〇〇〇〇〇00 〇 00 o bo 〇 irt 〇1 / 1 ρ a ο S δ o k > pp Ο OO ο o bo Ο bo («φ 藏? 3 one 00 — 00 two three * 1 Φ edge 〇K) · < ϊ k > U) KJ \ 00 yi ON to 〇ν 〇 \ 〇〇〇to Kj to k ) to U) U) U) Ln U) to oo to 00 £ ρ p 2 Expression (1) Bar-calculated value sheet "〇 > i Application of alloying treatment Poor wettability of plating New Poor wettability of plating Vt VT Vt Single Vr Single Vt Single Barrier Fouling No plating defects on the steel plate before processing 00 v〇L / 1 Ui 2 00 νο ο 00 〇os 00 〇as U) KJi t-Λ On os On K) o Os ON g U \ U) 〇L / 1 00 KJ \ TS / MPa Mechanical properties to K) to to 00 U) K) U) U) U) U) g u > as U) On U) On U) U) U ) {5 U) 〇 E17% main phase Composed of a mixture of ferrite and bainite * The main phase is composed of a mixture of ferrite and bainite * oo VO L / i 00 KjJ L / i The main phase is composed of a mixture of ferrite and bainite * 00 S) i / i 00 yi oo 00 bo U) 00 lyi 00 OO 00 00 〇OO 00 l / ig Lh 00 U \ g bo 埘 0 镩 ff · lacquer microstructure ο o 〇00 o U) Lfi 〇 ▲ a ^ s Os ON to Ul ON ο Lh Ln U > Volume percentage of austenite /% *** ο o In • to 〇〇00 ooo 〇o: 〇ο 〇o ο $ mi ~ 驷 to U) o Ui U) 00 On ih u > K) bo U) bo ren U) U) ο U) U) ^ rni I ^ r) m ° ϊ 本 料 π * 箐 * * * 料 * * 普 * * ** * N- * and * and * * * * • K · * * * * general * * pearlite 15% * # * * * general * 箐 * the rest of the structure /% *** U) ▲ U) U) ON ίο Ia oo \ j \ 00 00 ok) 2 Ui bo k) ρ Ui average ferrite particle size / micron 00 to u > K > ON ro to Os K) L / i to U) K) U) K > lyi Κ & gt k) average austenite particle size / micron b; K) U) average martensite particle size / micron 0.514 0.513 0.391 0.358 0.453 0.200 0.306 0.310 0.292 0.245 0.228 0.195 0.205 0.176 h Law Turtle i Dekun nz ^ Di P 〇Ul 〇 • Private 2 oo is) 〇P o P 〇 ▲ Foreign delta training wheat comparison bowl comparison steel comparison steel comparison steel comparison steel Comparative Steel, Inventive Steel, Inventive Steel, Inventive Steel, Inventive Steel, Inventive Steel, Inventive Steel, I Inventive Steel, I Comparative Steel | Inventive Steel | Inventive Steel | Inventive Steel, I Inventive Steel, I Comparative Steel, Inventive Steel The steel of the present invention (please read the precautions on the back before filling in this page) • Ordering 丨 This paper size applies the Chinese National Standard (CNS) Α4 specification (210X297 mm) 55 573021 Α7Β7 ^ > -9-T ^ f_J 笳 QWPV Bismuth micro Efr 卄 green astringent ae lacquer feng (_life> 7 邾 9 涔 濉 17 昀 21 green) month 丨 sheet test 务: Qin 捽 > ㈣650 7〇00 ° ~ Examination ^ l · ^^ 杳 轵 噼: Qin 6501 ^ 7000 ° JL shirt office each invention 3 5 C5 C3 C2 C1 D9 DC30 D7 D7 D6 D5 D4 D3 D3 D3 D2 D2 D1 D1 D1 D1 21 20 19 18 17 16 15 14 13 12 11 10 950o ° x3 today »〇〇500〇6 today miao 10000 ° X3, vlt 8500 ° X3, > 邝 8500 ° χ3 today ϋ ioxw ^ 8600 ° χ3 today ft 120010 ° xo_5, vlfe 8000 ° X3 ^ &ft; ft 8000 ° × 3ΦΙΙ 8300 ° X3 ^ > »Οο30ο ° χ3 Jin Miao 8300 ° X3ΨΙΙ 8100 ° X3, > Miao 8100 ° X3 Jin 邝

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K 680 so 0.3 650 0.5 so 0.5 680 680 so so 680 680 680 680 680 680 ^ .ο0 / # 〇0 30 10 § 10 470 30 470 Private 80 10 Ren 80 70 470 s 470 10 10 -0 Μ 10 Private 65 sl · " ^^ 考 S ..i η > 8: 卞 丰 知 i ^^ h ^ e 瀹 sQT- ^ is (Please read the precautions on the back before filling in this page) 沴 4705.4600 ° 15 470J.4600015 Qin 470J.46 ° CC5 # 'Qin 470 ^ 4600 ° 15 Nian 4705.4600 ° 5 #' lotion 芩 4705.4600 ° 25 ^ '; 5μ70 ^ 460ο ° 25φ 芩 475 ㈣ 4so ° 5 #' Qin 4755.4600 ° 20 25 chanting private 70 ^ 460η ° 33φ Qin 4705.4600 ° 18 chanting private 70 ^ 460〇 ° 25 chanting 470 ^ 4600 ° 15 # '芩 4655.4600 ° 18 chanting 465 ^ 460n ° 23f > Qin 465 ㈣4600 ° 23 chanting Private 65 _E46 ° oc 18 readings

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SSI ββ > Male S 瀹 ββ rrb »瀹 This paper size applies the Chinese National Standard (CNS) A4 (210X297 mm) 56 573021 A7 Description of the invention (17Γ " ~-Specific Example 1 Example 3 The following will be based on specific Example 1 and Example 3 illustrate the details of the present invention. The steel having the chemical composition shown in Table 9 is heated to the temperature of L2001; the hot rolling of the steel is completed at a temperature not lower than the Ac3 transformation temperature; Coiled at a temperature lower than the bainite transformation start temperature, the temperature is determined by the chemical composition of various steels, and then the steel is pickled and cold-rolled into cold-rolled steel plates with a thickness of ΐ0 mm. The composition of steel (expressed as mass percentage) calculates the Aci transformation temperature and AC3 transformation temperature:

Ac 丨 = 723-10.7xMn% + 29.1xSi%, llxCr% + 400xAl%. The plating method of the steel plate is: heating to the annealing temperature calculated from the ACl transformation temperature and the Ac3 transformation / JEL degree, and maintaining the steel plate in a nitrogen atmosphere containing 10% hydrogen; and then cooling at a rate of 0.1 to lot: / second Cool to 68 ° t; secondly, continuously cool to the bath temperature at a cooling rate of 1 to 20 ° c / second; and dip the steel in a galvanizing bath at 460 ° C for 3 seconds, where the composition of the bath varies. Further, as an iron-zinc alloying treatment, some steel plates are galvanized and maintained at a temperature range of 300 to 550 ° C for 15 seconds to 20 minutes, and the iron content of the plating layer is adjusted to 5 to 20% by mass. The plating properties were evaluated by visually observing the scum tangled state on the surface and measuring the area of the uncoated part. The composition of the plating layer is determined by dissolving the plating layer in a 5% hydrochloric acid solution containing an inhibitor and chemically analyzing the solution. A JIS # 5 test piece for a tensile test was prepared from a galvanized steel sheet (rolled at a thickness reduction ratio of 0.5 to 2.0% on a skin pass line), and its mechanical properties were measured. Further play I, 1 —-This paper size applies to the national standard (CNS) A4 specification (210X297 public love) " '71-

......... Fees: * *-(Please read the precautions on the back before filling out this page}. Order 丨 573021 A7 ___ B7 V. Description of the invention (55) The plating adhesion after severe deformation is evaluated by bending the steel sheet at 60 degrees and refolding after applying 20% tensile strain. The adhesion of the plating is the adhesion of the vinyl tape to the percent bending and refolding. Then, the tape is peeled off, and then the peel length ratio per unit length is measured. The manufacturing conditions are shown in Table U. As shown in Table ο, in the example of the steel sheet of the present invention, that is, 〇1 to 〇12 (the first , 2, 5, 12, 13, 20, 22 to 24, 32, 34 to 36, 39, and 42), no ore-covering defects were observed, and the balance between strength and elongation was good, even when 20% tensile strength was applied After bending and reverse bending application after strain, the peeling rate of the plating is still less than 1%. Further, it is necessary to understand that when other elements of the plating layer shown in Table 10 are included in the keying layer, even the value calculated on the left side of Equation 1 In relatively small areas, good plating properties can still be obtained. In terms of comparative steel, that is, C1 to C5 (Nos. 44 to 48), during the hot rolling of test pieces A large number of cracks are generated, and the productivity is not good. After removing the cracks by grinding the hot-rolled steel plate, the hot-rolled steel plate is cold-rolled and annealed, and then used for material quality testing. However, some steel plates (C2 and C4) are adhered to the ore after heavy-load processing. Poor performance, or tolerating 20% forming. As shown in Table 10, Nos. 3, 21, 46, and 48 did not satisfy Equation 1, poor plating wettability, and poor plating adhesion after reverse phase deformation. In the case where the microstructure of the steel plate does not meet the requirements, the adhesion of the plating after heavy-duty processing is not good. Take No. 3 as an example, because the secondary cooling rate is slow, no martensite and austenite are produced, but Pearlite is generated, and the adhesion of the plating is not good after heavy-duty processing. This paper size applies to China National Standard (CNS) A4 (210X297 mm) 58 (Please read the precautions on the back before filling this page)

573021 A7B7 V. Description of the invention (56) ^ -5-T ^ tJ 獬 焯 腐 Ε £ · > Yuan Weiwei: ^ Zongfeng. 2 G ί3 〇D12 D11 D10 2 s S sa Steel code 0.15 0.08 0.05 0.27 0.12 0.21 0.17 0.18 0.05 0.07 0.22 0.11 0.03 0.03 0.13 0.16 0.15 n 3.61 0.21 7.41 1.22 0.32 0.11 0.21 0.11 0.91 0.91 to k) U) 0.69 0.49 1— k to 0.48 0.45 1.32 〇4 ^ 〇〇 \ 1.97 2.81 1.05 〇1— ^ i Η— * ON • s to o 0.98 0.95 Mn 0.02 0.06 0.05 0.03 4.56 0.78 0.67 0.03 0.03 0.75 0.31 0.62 0.48 0.95 H— ^ 1— * K) > 6.52 0.38 0.08 0.55 0.23 0.09 0.19 0.12 0.15 2 O 0.09 n 0.74 g 0.54 0.42 oc 0.08 n O 3.22 0.01 σ- 0.01 Η 0.005 < IS 0.0026 DO 0.01 N 0.01 X 0.02 0.025 0.05 0.01 0.03 0.02 0.01 0.02 0.01 0.01 0.03 0.02 0.01 0.01 0.02 0.03 0.02 0.03 0.002 0.004 0.004 0.003 0.004 0.001 0.007 0.008 0.005 0.00 0.0007 REM Comparative steel The invention steel ( Please read the precautions on the back before filling in this page) •, tr · This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 59 573021 A7B7 V. Description of the invention (57) > -δ · τ ^ »Hold 烨 πη >; Ε &; 瘁 迤 撖 9 ~ 柰 本. * Yezi & Yong? »Zongnong Mπ Heteropterin Sound Listening-Cone αΜιφΒ ^ τχ Sound! Η-φ- 加 舟 爿 ^ 芩 20%-Take Siyang greedy-Sit 澌 mining; Yi 14 beach ^ h * tis 涣 tl0T-4t * l ±-** 芩 > Mangcai Mingling ^ 鲥 谥 ~ 令7 嘀 扣 涣 _ ># (^^ 铼. I. ^^^^ mi ^ bb- ^ t ^ los / tnc ^^^^^ l ^^^^ B ^^ L ^^^ t ^^ ^ '^^^' ^ xtT ^^ sir ^ HV ^^ itnH ^ tt. § g § § § S g S 2 sssssss S ss SS s S s SSS σ 〇σ σ ίΟ tvj U) Co 00 σ; 5 ; w to s Ό 00 On U) NJ 一 〇ki Ul o On Ul ssob: ob: ob;-• ο ss ο s P gob; ρ ssoo P so • s O • g 〇S o 2 og 〇os ρ 〇 ρ _〇 Aluminium content of plating layer% ο os ρ • ο • s KJi sp-ο sossgs S • s P • S posoooooooo 〇spg 〇g • SS life 4 ΙΦ 锄 Ό oo----Ό 00 ooo Ό 00 O 00 o Ό Ό o 00-〇Iron content of plating layer% ** 1_ 1 0.288 0.288 0.288 0.288 2.788 2.143 o 00 to ro ro u > i-Λ U) 0.279 1.529 I 2.154 2.779 1 0.279 2.779 U) U \ U) to 2.355 s 1.855 S 5 bo to * ^ o 00 £ · 〇ρ Expression ⑴ Calculated 1 Ti: 0.05 Cu: 0.5 Ni: 0.2 CnO.03 Cd: 0.01 Rb: 0.01 Ca: 0.07 K: 0.04 In: 0.7 I Ba: 0.01 I Nd: 0.0 4 I Ti: 0.08 Si: 0.01 I Ta: 0.02 1 Pb: 0.4 1 Na: 0.01 Ca: 0.01 Ag: 0.5 Ni: 0.1 Ca: 0.9 Mg: 0.005 I Mo: 0.01 Other elements on the plating layer > Application alloy Chemical treatment 0M 〇M 眵 〇M single 〇M 〇M 〇M 〇M Vt single Os § ON § 〇 00 ON 00 OS s ON § 〇 \ S KJ \ Os Ul 〇 〇 \ o 〇 \ o ON oo ON o 2 O 2) δ Ui δ LA δ Ui δ δ U \ δ U \ δ g 00 LA TS / MPa Mechanical properties 丨 U) u > U) U) U) U) u > U) U) LU U) U) U) u > u > On U) 〇 \ U) ON U) o u > ON OJ ON U) Os 〇J On LU U) On U) o U) Os U) On U) os U) ON U) U) EL ·% 00 U \: 00 00 00 J-Λ 00 LA 00 • Private • Private 00 00 bo • ss §§ bo 00 VO bo 00 VO ON 00 v〇bo s bo S bo bo 00 • Lh 8 u »S • Ui 8 1-Λ 8 8 La 8 Lai 8 Ui Mao \ 〇ki s 00 On Called 0 Select Microstructure 1 00 00 00 00 00 00 00 ο Ιλ On y% ON • On ps ON On Os Os ON • K) ON Ui On U \ bs u »Lh ON U% • ON Ltt bo ΙΟ y * 〇U) 百分比 Volume percentage of austenite /% *** oooooo ο ON ο oooooo 〇 o 〇o 〇〇ooooo ΙΟ 〇〇o Volume percentage of martensite /% * ♦ * o Ln ON Ln as l / l ON Lh as Lh Os Ln ON U) to bo s U) bo U) bo u > bo U) bo u > bo U) bo U) bo £ U) 'SO UJ v〇U) bo U) • N〇u > • v〇U) so Ui • NO ΙΟ u > LO * ^ 〇U) Bayes Volume percentage of body /% *** # # * # 期 # 普 # # # # # # # # # # # # # # # J * * * # 丨 一一 丨 、 杂 # # # Structure of other parts /% * ** ON • U) ON u > U) On • U > KJi u > u > Ιλ Ιλ 00 • Ό 00 • SO 00 • VO 00 00 00 • NO 00 00 • so S ppp PP 2 • S Γ3 k) iron Oxygen average particle size / micron: 'ο ·: • Ξ K) u > N) bo to ON K) On N) Ov NJ bs K) ON tO ON K) On K) U) NJ U) to • U) NJ U > t〇U) K) NJ 1 > JU) K) 1/1 K) k) Average austenite particle size / micron Martensite average particle size / micron 1 0.358 I 0.358 1 0.358 1 0.358 | 1 0.358 | 0.358 1 1 0.358 I 1 0.453 1 0.200 1 0.306 0.310 0.292 0.292 0.292 0.292 0.292 0.292 | 0.292 | 0.245 0.228 0.228 | 0.2 28 0.228 0.228 0.228 | 0.228 1 0.195 | 0.205 1 0176 Ratio of average particle size of ferrite to average particle size of second phase oop • ooo S s • sooo oopoopooooooo? 3 · 〇o? Fine steel of the invention 1 Copper of the invention Invented steel Invented steel Invented steel Invented steel Invented steel Invented copper Invented steel Invented steel Comparative copper Invented steel 1 Invented steel 1 1 Invented steel 1 1 Invented steel 1 Invented steel 1 Invented copper 1 1 Inventive steel 1 1 Inventive steel 1 1 Inventive steel 1 1 Inventive steel 1 1 Inventive steel 1 Inventive steel Inventive steel Inventive steel 1 Inventive steel 1 Inventive steel 1 Comparative steel 1 t Than steel 1 "Inventive steel | B Inventive steel 1 (please read the notes on the back before filling this page), tr— This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 60 573021 Α7Β7 V. Description of the invention ( 58) > -sT 蚪 Ma masking spicy Qn > Micro κ · > Xiongpan 揪 a ~ Qifeng. * ± Jincao & Yongnong miscellaneous agropyridinium sprouts-heteroaMt scale field. XS stall house coffee 噼 爿 A 芩 20O / O-Take the 淖 洋 弇 -Sit 澌 尜 If Yi 14 beach Caibu Yangzhong lingling detailed. ** Qin > Di Cai Ling Ling ^ 擗 尚 ~ Ling 7 Pa and Yi Yi Ming (»^ Yong. ♦ i ^^^^ lf ^ tb ^ t ^ los / til ^^ lf ^^^ a ^^^ ^^^ L ^^^^^-vb ^ 'IMt ^' ^ ziT ^^^^^ h + ^^^-s' ^ tb. Q 2 G Ω 〇σ σ ίο 〇gg σ ο ϋ ο α ο S g σ 2 s Jr it 矣 6 will u > 〇〇w ΰ U) 〇 〇 · 〇〇〇〇δ ρ • 〇 ρ L / i 〇to Ul SS • o δ S s • 0 Ο 〇 〇δ • 0 plating Coating aluminum content% 〇〇〇〇〇〇〇〇δ g · 〇 • ι ρ ob; S ok) Ui • ο • ο ss ο Ι-Λ 〇ρ plating layer content% Γ3 Ό one. 0: One. * 1φ «5ϋ | 2 Κ) 1 • ΰ U) KJ \ 〇〇1.417 I 2.167 1 0.425 1 0.425 i I 0.615JS ΐ§ Ui '-j as 〇Ν νο Os 1 15181 Expression ⑴ Calculated value Μο.Ό.02 | γ: ο.οι Co: 0.2 Mo: 0.01 Hf.0.01 K: 0.04 ZrO.Ol La: 0.005 V: 0.05 Other elements on the coating layer 〇M 〇M 〇M qM 〇M Application of alloying plating Poor Wetness | Poor Wetness of Plating Wetness • Add 4 澌 4 Vt Vt £ Η Γ 4 KJ \ Ui 1 § Os Os as to On K) 〇 NJ t-Λ 'O 00 s 00 〇00 〇〇 〇〇 TS / MPa 1 mechanical properties | lu > IK UJ OJ U) UJ U) u > UJ u > U) U > Κί WU) U) E17% The main phase is composed of a mixture of ferrite and bainite》 1 — | The main phase is composed of a mixture of ferrite and bainite * | 8§ KJ \ 00 o u > SU) 00 so U) so N) N Lh ν〇NJ Ιλ • u »S The main phase is composed of ferrite Composition with a mixture of bainite * Ιλ 00 15g ϋ > ~ I Microstructure IO λλ c: ooo Private 0 〇 • Ό 90 Volume percentage of austenite tU% *** IO ok) ok) to oo ο 0 L / ik) 〇0 Markov Volume percentage /% *** Private Ιλ u »U \ u > Ιλ U) KM U) U \ 0 • W bo ON Ui Volume percentage of bainite /% *** # # substitute # * # # # # Structure of other parts /% *** OJ 00 00 a-u > U) δ ON u > Average ferrite particle size / micron iNJ Ιλ Ν) Ιλ to bo hJ bo Κ) 00 Average austenite particle size / micron tO to to K) k) bo Average martensite particle size / micron 0294 1 0.294 0.314 0.314 0.314 1 ° 255 1 0.255 0.255 1 0.514 1 0.513 1 0.391 1 0.358 Ratio of average ferrite particle size to average particle size of the second phase Ο Ο poo 0 〇〇 • OS ρ 〇 | 11 |! Ι ^ ϊΙ Comparative copper 1 Comparative copper | Comparative copper | Comparative steel 1 I Comparative copper I Inventive steel 1 Inventive copper 1 p Inventive steel 1 p Inventive copper 1 p Inventive copper 1 Inventive copper 1 1 Inventive steel I 丨 Inventive copper 丨 Inventive copper IB Inventive steel 1 | Comparative steel | 1 Inventive steel ι 1 Inventive copper ϊ ϊ (5 (Please read the precautions on the back before (Fill in this page) The size of this paper applies to Chinese National Standard (CNS) Α4 (210X297 mm) 61 573021 A7B7 Wu Ming said Ming Fa \ / 9 5 l · ^^ Test: 650 rushing 700 °° 5. Weng shirt bismuth 綷 哞 Wei 00 ± 00 °° ~ Lang 綷 綷 轵% C5 M8 C4 C3 C2

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Trcr »! §1 ββ ^ fs This paper size is applicable to the Chinese National Standard (CNS) A4 (210X297 mm) 62 573021 A7 ___B7 V. Description of the invention (60) Examples of specific embodiment 2 The following will be based on specific embodiments The example of 2 illustrates the details of the invention. The steel having the chemical composition shown in Table 12 is heated to a temperature of 1,180 to ijsot; the hot rolling of the steel is completed at 880 to 1,100 ° C; and the hot rolled steel plate is cooled and then begins to deform below the bainite The temperature (determined by the chemical composition of various steels) is coiled, pickled and cold rolled into cold rolled steel sheets with a thickness of 1.0 mm. Then calculate the ACl transformation temperature and Ac3 transformation temperature from the composition of various steels (expressed as mass percentage) according to the following equation:

Ac1 = 723-10.7xMn% + 29.1xSi% ^ AC3-910-203 x (C%) 1/2 + 44.7x Si% + 3 1 · 5 xMo% -30xMn% _ i llxCr% + 400xAl%. The bonding method of the steel plate is: heating to the annealing temperature obtained from the Aq transformation temperature and the Ac3 transformation temperature, and maintaining the steel plate at 100%. Under a nitrogen gas of hydrogen, it is subsequently cooled to a temperature range of 650 to 700 C at a cooling rate of 0.1 to 10 C / s; then, 0 to 20 is used. [] / Sec. The cooling rate is continuously cooled to the temperature of the plating bath; and the steel sheet is immersed in a galvanizing bath at 460 to 470 ° C for 3 seconds, wherein the composition of the plating bath is different, and the surface passing line is 0.5 to 2.0%. Thinning rate rolling. Further, as an iron-zinc alloying treatment, some steel plates are maintained at a temperature range of 400 to 550 ° C for 15 seconds to 20 minutes after plating, and the iron content of the plating layer is adjusted to 5 to 20% by mass. The appearance of the plating was evaluated by visual observation of the scum tangled state on the surface and by measuring the area of the uncoated part. The composition of the plating layer was measured by dissolving the plating layer in a 5% hydrochloric acid solution containing an inhibitor and chemically analyzing the solution. The results are shown in Table 13. 63 (Please read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CNS) A4 specification (21〇 > < 297). 5. Description of the invention (61 can be seen from Tables 13 and 14,湓 g The steels of the present invention whose rating levels are all 5 and the strength of the fish extension ^ formula, all of the comparative steels that meet the requirements of the present invention: good. In terms of it, the balance between strength and elongation_ Steel manufactured in a range with low grades without exceptions is obvious: it is also excellent in the scope of patent application for this invention, and it has a structural composition between strength and elongation. The size of the paper outside the steel is applicable to China National Standard (CNS) A4. (210X297 mm) (Please read the notes on the back before filling this page)

64 573021 V. Description of the invention (62) A7B7 ^ Pan Qn > Micro Et potential margin Weihan ~ Naifeng. S 8 8 s > (-X 〇m α 〇D0 > steel code 0.23 0.06 0.13 0.19 0.12 0.14 0.24 0.09 0.08 0.22 0.15 0.17 0.18 0.15 0.19 η 0.01 0.52 0.15 0.08 9J2 0.08 0.01 0.007 0.007 0.008 0.05 0.005 0.005 0.09 0.009 〇ϊ 2.61 2.98 1.68 2.56 1.85 1.12 0.87 1.41 5 δ 0.81 〇bo 〇Μη 0.04 0.05 0.03 0.03 0.03 0.52 i bo 1.34 0.67 0.65 i 0.95 > 〇0.95 0.78 ρ 0.05 0.21 0.05 0.13 0.22 0.22 0.05 0.14 0.21 0.13 Mo 0.02 0.02 0.01 0.02 0.01 0.01 0.02 0.02 0.01 0.025 0.015 0.01 0.01 0.01 0.02 π 0.002 0.005 0.004 0.004 0.003 0.002 0.003 0.004 0.005 0.003 0.002 0.006 0.006 0.006 0.004 0.005 Is) 0.05 η S Ο ON 0.42 ζ 0.25 η 0.15 0.01 ο 0.05 0.11 Ml 0.01 ζ ρ 0.01 Η 0.01 C 0.01 Ν 0.005 X 0.005 0.15 0.001 D0 0.02 0.0005 0.0008 P 0.0003 0.0006 ρ Ο 2 0.0005 0.0003 REM comparison steel comparison steel comparison steel comparison steel comparison steel present invention steel present invention i present invention steel present invention steel present invention steel present invention steel present invention steel | present invention steel present invention steel present invention steel remarks (please first Read the notes on the back and fill in this page.) This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) 65 573021 A7 _ — _B7 V. Description of the invention (63) f13: Various wettability, corrosion resistance, Microstructure and fatigue life steel code A Rational number l Plating content% 0 01 Plating aluminum content% Π 1 Plating molybdenum content% Plating iron content% Expression ⑴ Calculated value Plating other elements % Application of alloy after plating treatment ^ Dagger heating treatment Appearance rating A? 0.05 U. 1 0Ύ5 ~~~ '' .0001 0.43 No 5 Inventive steel A 3 0.04 0.6 ~ 0-001 0.001 12 11 0.38 -0.07 Yes and 5 Inventive steel BBB 4 5 6 0.03 0.11 0 04 0.3 0.4 f \ Λ 0.001 0.002 10 0.141 0.041 Si: 0.001 No 3 5 5 Comparative steel Inventive steel Inventive steel C 7 0.1 0.3 < 0.0001 0.002 12 0.041 0 .245 No Yes 3 5 Comparative steel C 8 0.04 0 ^ 8 ~ 0.003 11 -0.26 Yes 2 bl · * D 9 0.7 0.5 < Μ〇〇1 0.051 Cr: 0.004 W: 0.005 No. 3 Comparative steel D 10 0.6 0.4 0.002 10 0.151 Cr: 0.005 W: 0.007 Yes 5 Inventive steel E 11 0.2 0.3 0.005 11 0.205 K: 0.01 Yes 5 Too fine E 12 0.15 0.4-0.002 10 0.105 Ag: 0.004 Yes 5 Inventive steel E 13 0.3 0.3 0.005 10 0.205 Ni: 0.01 Cu: 0.01 Co: 0.002 Yes 5 Inventive steel F 14 0.5 0.45 0.001 0.046 Ti: 0.002 Cs: 0.003 No 5 Inventive steel F 15 0.1 0.05 0.003 9 0.446 Rb: 0.002 Yes 5 Too fine G 16 1 0.5 0.002 10 0.025 V: 0_003 Zr: 0.003 Hf: 0.002 Ta: 0.002 is 5 invented steel G 17 1 0.4 0.002 10 0.125 V: 0.002 Zr: 0.002 Nd: 0.007 is 5 invented steel H 18 0.5 0.7 0.0003 -ΛΔ2 B: 0.002 Y: 0.003 No 3 Comparative steel H 19 0.4 0.35 0.0002 10 0.165 B: 0.003 Y-.0.002 Yes 5 Inventive steel H 20 0.5 0.45 0.0002 9 0.065 Na: 0.007 Yes 5 Inventive steel I 21 0.7 0.1 0.001 11 0.442 Cd: 0.01 is 5 invented steel I 22 0.7 0.5 0.003 12 0.042 La: 0.02 is 5 invented steel I 23 1 0.4 0.002 12 0.142 Tl: 0.02 Yes 5 Inventive steel I 24 0.05 0.45 0.004 11 0.092 In: 0.005 Yes 5 Inventive steel I 25 0.5 0.3 0.007 12 0.242 Be: 0.01 Yes 5 Inventive steel I 26 0.5 0.35 0.001 0.192 Pb: 0.02 No 5 Inventive steel I 27 0.6 0.13 < 0.0001 0.412 No 4 Comparative steel J 28 0.05 0.34 0.0002 11 0.118 No 5 Inventive steel J 29 0.06 0.2 < 0.0001 10 0.258 W: 0.005 Co: 0.02 Yes 4 Comparative steel J 30 0.06 0.45 0.0001 0.008 W: 0.01 Co: 0.03 Tc: 0.002 Ge: 0.008 Yes 5 CA 31 0.1 0.2 0.007 9 -3.22 Yes 2 Compare steel CB 32 1.5 0.3 0.08 8 0.078 Ag: 0.01 Yes 5 Compare steel CC 33 0.5 0.4 0.007 -0.04 No 3 Comparative steel CD 34 Many cracked green comparative steels during hot rolling CE 35 Many cracked green comparative steels during hot rolling (Note) The number of underlined underline $ is the condition beyond the scope of the present invention * the volume of each phase The total percentage / ratio is 100%, and the phases, such as carbides, oxides, and sulfides, which are difficult to observe and identify by optical microscope, are included in the volume percentage of the main phase. The kr main phase is an example composed of bainite. Because the structure is extremely fine, it is difficult to quantitatively measure each particle size and the volume percentage of each phase. (Please read the notes on the back before filling this page)

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SSI vrb ^ l ι £ # 1 rrrr »! Is This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) 67 573021 A7B7 V. Description of the invention (65) (tH-) T 蚪 ί-J 槔 AMP Miscellaneous Yan Yan on ££ > Xiong Pan Nan S ~ Qi Feng Q 8 RS 5 < -H------XXX ο ο " Π π mmm σ D ο n GD CO DO > > > 枭 方 瀹 b; w Νί bi NJ s 00 s: U >? 3 = Ο Ό 00 Os U > Μ-miscellaneous to 8? 3 8 8 8 8 1 II 1 § § § S § S 8 5 δ 5 Ο 8 8 1 1 Γ3 8 to 8 to 8 8 8 8 8 8 8 8 8 3 Μ δ ^ 1 • Jilian 5S E & Knee 'Φ Lian 5S Efr 苎 4 Knee P = Μ Hair ν〇Ο 1 1 § I § 1 1 1 1 1 1 1 00 S 00 8 1 1 ii § § Ux U \ | 0 Ο Ο 00 s OO s II s〇o! 〇oiii E · -love00 § N ) | iii 1 1 1 1 X ul v〇1 1 § 00 § 00 5 SSN) K) ίο to δ S Ul δ δ u > δ U) δ U) Fan M 00 ss Μ Μ Μ Μ Μ 8 8 00 ίϋί 00 § Μ σί u > σί U) ON U \ σί Lh Lh 00 00 00 3 s dropped β · ο 1 I | § g ΟΟ ο 1 I g I 00 00 og | g I 00 § II I | § 1 1 ^ 1 U \ KJi--1-,--one----one. Three ο 〇〇Κ) to S s S----1¾--IW U) u >, 1 〇Selection piece 'Baba σ \ § Is 1 1 1 | ON i 1 as ON 1 8 i 1 1 1 Os § | ON § i Os B On § ON § I ON § ^ 1 η ^ > one-s one. s one. s 〇Γλ U »U \-• J KJ \ o O IS L ^ l U \ II o • -j Γ? (% · ^ Consider δ I o ° 1 I o ° 1 o ° δ 1 o ° 1 n °% δ I ο ° s 〇 ° I 〇 ° I 1 ο ° D; read 1 1 〇 ° D; Ut% δ 〇 ° 1 〇 ° S KJ \ 1 〇 ° 8 1 G ° 1 d § I read § 1 α ii 孝 filial piety 1 ri% I n ° S etc. Ul 1 o °% 矣 Ui 1 o °% II o ° 1 G ° Ui I i § I n ° D; let δ I n ° D;% δ G ° Nian Ui 1 o °% 矣 1 n ° ss; Chong Ul 5;% 1 ^ J \ ΙΛ 1 Ui! 2 Miscellaneous U \ U »U \ Ln KJ \ Lh U% U \ 〇U \ 〇§ U \ U \ i-Λ yj \ yj \ U \ Ui U \ KJ \ Ln § U \ Ui O Ui 〇li o _s ρ o 〇ο S δ s δ 〇S-P · 〇S • OS--ρ S 2 〇b: s £ _〇o ord ρ O 2 p 〇so os 〇〇m ΙΦ JiaPS • s • o ul s ο ο C: ο bi • S 〇 · 〇S p ο s Ui PP δ ο δ P Ul 2 p 5 ρ SS spp 2 § o 〇 Round 涣 S wins _ 0 1 p § o § 0 1 A 1 ο I a 1 ο '8 ο' 8 〇_i 〇'1 〇§ 〇8 ο i NJ o § N) 0 1 0 1 ο § ο § o '8 0 1 0 1 0 1 ο 1 1 o § 0 1 幺 1 〇1 O 8 o' 8 o '8 〇1 00 Ό o-to 一-? 〇 VO Trinity. ο ο O o two ο s two Γ3 Yong Yi14 > ^ 6 § o • 3 00 U) o '8 00 o bi 00 • ο 00 ο ο Ϊ3 Ο 1 〇S: 〇S 〇0 1 P 1 | έ o § ο S ο Ye o o ot P § o Ui ο b; o • s § • s Lh o deg o δ § __1 1 o U) 戋 ρ 2 »iu > U \ iro On 1Private KJ \ 14 ^ Ui LA t-Λ | U) U \ 1-Λ KJ \ LA KJ \ U »| UJ INJ | U) KJ \ IUJ KJ \ KJ \ SU \ δ | Metal Lh § SU \ 8 1 Μ 1 1 OO Ut 00 U \ 1 Μ Os § Dad Ui s KJ \ 8 LA Ul gg s | 1 Ye U! ^ Ϋ́ ΰ 名 ΰ will to Ω g R 8 o «-Η (-Η-------XXX 〇 〇 ο • η • nmmw α un η DO ro ω > > > Khan $ 瀹 fr fr 诔 Fr 瀹 it male 1 瀹 t male 1 fr t male 瀹 t male 1% male male 瀹 tt male male t η 1 t 瀹 t 瀹 瀹 于 £ £ t 雄 雄 t 1 1 S S 瀹 t i i5 瀹 Pr 瀹 gt t 虽 1 1 Although: s 瀹 瀹 gt > 14: 雔 python蚪 Nongzhi and Miscellaneous (Please read the precautions on the back before filling this page) • Order 丨 This paper size applies to China Standard (CNS) A4 specification (210X297 mm) 68 573021 A7 B7 V. Description of the invention (66) Examples of specific embodiment 3 The details of the present invention will be described later based on the specific embodiment 3. The chemistry shown in Table 15 The composed steel is heated to a temperature of 1,200 to 1,250 ° C; the heated steel is rough-rolled at a total thinning rate of not less than 60 ° C and a temperature of not less than 1,000 ° C; and then the hot rolling of the steel is completed And the hot-rolled steel sheet is cooled, and then coiled, pickled and cold-rolled at a temperature not lower than the starting temperature of bainite transformation (determined by the chemical composition of various steels) to become a cold-rolled steel sheet with a thickness of 1.0 mm. Calculate Ac transformation temperature and Ac3 transformation temperature from the composition of various steels (in terms of mass percentage) according to the following equation:

Aci II 723-10.7xMn% + 29.1xSi%,

Ac3 = 910-203 x (C%) 1/2 + 44.7xSi% + 31.5xMo% -30xMn% -llxCr% + 400xAl%. Steel plate: heated to the annealing temperature obtained from the Ac! Transformation temperature and Ac3 transformation temperature, maintaining the steel plate in a nitrogen atmosphere containing 10% hydrogen; cooling after annealing, and the maximum temperature reached during annealing is defined as Tmax (° C), Cool at a cooling rate of Tmax / 1,000 to Tmax / 10 ° C / s in a temperature range of Tmax-200 to Tmax-100 ° C; then at a cooling rate of 0.1 to 100 ° c / s at a bath temperature of -30 ° C to plating bath temperature + 50 ° c cooling in the temperature range; then dip the steel plate in the plating bath; and maintain the temperature range of the plating bath temperature _30 ° C to the plating bath temperature + 50 ° C for 2 to 200 seconds (Including immersion time). As an iron-zinc alloying treatment, some steel plates are maintained at a temperature of 400 to 550 ° C for 15 seconds to 20 minutes after plating, and the iron content of the coating is adjusted to 5 to 20% by mass, further on the skin pass line Rolled at a reduction ratio of 0.5-2.0%. The steel plate is completely flat and curved (R = lt), and has undergone more than 69 cycles of JASO cyclic corrosion test (please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) 573021 A7 ------- B7 V. Description of the invention (67 — up to 150 cycles, as a means of assessing resistance in chlorine-containing environments, and rating of corrosion residues. The composition of the key coating is via a dissolving bond coating The results were determined based on the acid solution and chemical analysis solution containing the inhibitor, and the results are shown in Table 16. ^ From Tables 16 to 17, the steels of the present invention satisfying the expression (3), all have a corrosion rating of 4 or 5, with strength The balance with the elongation is good. Β In this respect, the comparative steel that does not meet the scope of the present invention fails to meet the requirements of the microstructure or manufacturing conditions, so the balance between strength and elongation is not good. No 3 Corrosion rating of No. 13 and No. 13 (comparative steel) is 4 or 5. But the balance between strength and elongation of No. 13 and 20 is not good, and the tensile strength of No. 3 is low. , Steel manufactured within the scope of the patent application scope of the present invention, The microstructure is composed of the aforementioned structure, and the steel has an excellent appearance and a good balance between strength and elongation. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 70 573021 A7B7 V. Description of invention (68) (t5T4t_J holding a plate of bismuth micro-zhuang countermeasures Pan Weihan ^ 柰 Feng. 〇JH o ο " Π m σ η > steel code 0.18 0.23 0.19 0.11 0.08 0.08 0.002 0.24 〇 to 0.07 0.12 ρ 0.13 0.15 0.18 η 0.02 0.008 0.01 0.01 0.33 0.15 0.008 0.005 0.012 0.008 0.05 0.09 0.08 0.009 0.005 fe to i 2.98 Lo 0.08 0.78 2.33 s δ 0.98 〇 VO b 3 〇 to to s 0.04 0.05 〇s 0.05 0.85 Os 0.03 0.03 0.55 0.36 0.69 > 0.11 0.18 0.13 g § p IK 0.17 0.18 0.04 0.02 0.05 0.09 0.22 0.17 〇 ο ο 0.01 oo 0.02 0.02 oo 0.008 0.02 Ο 〇 0.025 0.015 0.02 Ο 〇 〇〇0.01 0.004 0.006 0.005 0.002 0.005 0.004 0.004 0.004 0.005 0.003 0.002 0.004 0.006 0.004 0.005 cn to oo 0.12 η Lr \ OJ Lr, 0.83 z IS 0.44 ο 0.37 ο 0.05 0.15 p ζ 0.05 〇o Η 0.88 0.05 < 0.005 Ν 0.01 X 0.01 0.15 0.0003 W 0.015 0.0003 0.001 P 0.0004 0.0005 0.55 0.0003 REM Steel of the present invention Steel of the present invention Steel tb of the present invention Comparison of steel Steel 1 Inventive steel Inventive steel Inventive steel Inventive steel 1 Inventive steel ι Inventive steel ι Inventive steel notes (Please read the notes on the back before filling out this page), OK | This paper size applies to Chinese national standards (CNS ) A4 specification (210X297 mm) 71 573021 A7B7 V. Description of invention (69) Table 16: Wetting, corrosion resistance, microstructure and fatigue life of various steels Indium content of coating% * Full content of steel% Expression ⑴ Calculated value # The iron content of the coating layer after alloying heat treatment is applied after plating treatment% JASO150 The evaluation level of insect resistance after the cycle test A 1 0.012 0.0002 0.17 1 .42E-01 No 5 Inventive steel A 2 0.34 0.001 0.17 4.01E + 00 is 9 5 Inventive steel A 3 0.37 0.001 0.17 4.36E + 00 is 10 5 Compared with steel B 4 0.46 0.003 0.22 4.20E + 00 is 9.5 5 Inventive steel B 5 0.03 0.0001 0.22 2.73E-01 No 4 Inventive steel B 6 0.001 0 0.22 9.09E-03 No 2 Comparative steel C 7 0.015 0.0001 0.09 3.34E-01 No 4 Inventive steel C 8 0.044 0.003 0.09 1.01 E + 00 Yes 11 5 Inventive steel D 9 0.6 0.0001 0.05 2.40 E + 01 No 4 Inventive steel D 10 0.55 0.001 0.05 2.20 E + 01 Yes 10.5 4 Inventive steel E 11 0.013 0.0004 0.02 1.32E + 00 No 5 This Inventive steel E 12 0.05 0.003 0.02 5.15E + 00 Yes 12 4 Inventive steel F 13 0.3 0.005 0.02 3.03E + 01 No 4 Comparative steel F 14 0.009 0.0001 0.04 4.53E-01 No 5 Inventive steel F 15 0.074 0.003 0.04 3.78 E + 00 Yes 8.5 4 Inventive steel G 16 0.018 0.0001 0.18 2.01E-01 No 4 Inventive steel G 17 0.51 0.002 0.18 5.68E + 00 Yes 10 5 Inventive steel H 18 0.051 0.0002 0.17 6.01E-01 No 5 This Invention steel H 19 0.42 0.001 0.17 4.95E + 00 is 10 5 Invention steel H 20 0.55 0.002 0.17 6.48E + 00 is 9 5 Compare Steel II 21 0.011 0 2,5 8.80E-03 No 2 Compare Steel JJ 22 0.56 0.007 0.005 2.25E + 02 Yes 11 3 Compare Steel KK 23 Many cracks during hot rolling Comparison Steel LL 24 Many cracks during hot rolling Comparison Steel Ml 25 0.015 0.0005 0.13 2.35E-01 Yes 10 5 Inventive steel M2 26 0.005 0.0003 0.13 7.92E-02 No 5 Inventive steel N 27 0.013 0.0010 0.18 1.5E-01 Yes 9 5 Inventive steel 0 28 0.011 0.0006 0.11 2.05E-01 is 10 5 of the invention steel (please read the precautions on the back before filling this page)

May, I (Note) The number of underlined bold glyphs is a condition beyond the scope of the present invention * When the molybdenum content is less than 0.0001%, the value is not considered as 0. ** The total volume percentage of each phase is 100%. The phases that are difficult to observe and identify by optical microscope, such as carbides, oxides, sulfides, etc., are included in the main phase volume percentage. In the case where the main phase is composed of bainite, it is difficult to quantitatively measure each particle diameter and the volume percentage of each phase because the structure is extremely fine. "1.42E-01" means 1.42X10 · 1. 72 This paper size applies to Chinese National Standard (CNS) Α4 size (210X297 mm) 573021 Α7B7 Instructions \-/ 70 (Speaking) τ ^ Μ 擗 唞 崁 烊 Bismuth Micro-E ·· 卄 缘 卄 难 难 β柰 丰 * Spider salt ♦ * Shenqin 0.0001% Zhong 狨 Mo 莾 莾 Bi. ** Envy Zhong Bo mijin tb 搔 Gan Bi Bi 100%-溆 溆 溆 薛 薛 薛 薛 薛 薛 薛 Bi Bi 沣 沣 沣 沣 窆 窆 窆 窆 窆 窆 窆 芽 this bud wMHeM ^^^^^^ e ^^ ml ^ rrb. Ο 28 Μ M2

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Zhong Zaixuan, vrrCT 0.8 1.2 1.00 1.9 P6 0.7 2.5 0.9 1.2 1.7 1.9 2.2 1.2 2bo 3.2.2 2.5 2.17089 2.432 2.15176 > liters So »vt batch crushed 10 P1M29 0.15 0.100 PI 5833 0.12 PI 75 P625 0.16364 0. ^ P22667 0.1875 0.14615 0.2 P13333 0.175 0.21333 Ιο PI 4286 0.19231 570 25 14250 305 565 790 0015 615 625 890 910 945 0 so 780 785 570 575 600 585 580 540 640 645 筘 綷 綷 / MPa 51 30 23 37 37 23 22 s 23 23 200 200 27 38 39 38 37 15555 16950 18960 18745 22755 23125 20470 20020 9450 20355 20240 21840 21980 22800 23000 16200 22230 22620 δ60 2S20 23865 ββ (MPa) 1 odd > 噼 (%) It is tb blue tb »瀹 $ ββ rrb» l $ ββ This paper size applies the Chinese National Standard (CNS) Α4 specification (210X297 mm) 73 573021 A7B7 V. Description of the invention (71) mm σ α 〇ο DO DO CO > > > II S 00 Os U \ U) K) I § 1220 1220 1210 1250 § 1220 1220 δ ο 1230 1230 Heating temperature rc 00 Lh ΟΟ VO K) 〇〇Ui 1¾ 00 00 00 00 S Total thinning rate of rough hot rolling /% 〇 ο Ο ο s 〇 1030 S 〇 § Lh 1 so § oso § o S 〇 Rough hot rolling finishing temperature L / 〇c 00 00 Ui Κ) 1082 Κ) 1 o On port s U) 巳 Ό U) δ to K > to Κ) + o »V £ 3 $ 2 S 4 2 2 〇〇Di OO U) 00 s 00 s σί oo os 0.12χ (Ac3-Aci) + Aci (calculated value) rc 00 Ν) Lh ΟΟ Κ) Lh: ΟΟ U) Lh 00 U) οι 00 to ο 00 〇Is 00 to o 00 K) oso 00 U) o 00 U) o Southest temperature during annealing: Tmax (° C) rc U) U \ κ > ρ U) l§ —-one to one-once cooling rate /. . / Sec Os 〇〇Ν ν〇Ο 3 ο On 〇ON oso ON 00 oa \ g li Os OO o ON 00 o ^ 1 nr® ^ > o Is 11 secondary cooling rate / 〇c / s between 465 and 460 ° C3 seconds at 465 to 460 ° c 10 seconds at 475 to 460 ° C 50 seconds at 455 to 460 ° C 300 seconds at 475 to 460 ° C 45 seconds at 475 to 460 ° C 60 seconds at 465 to 450 ° C 3 seconds at 465 to 460 ° C30 seconds at 465 to 460 ° C 30 seconds at 465 to 455 ° C 15 seconds at 465 to 455 ° ci5 seconds at 465 to 455 ° C 35 seconds including galvanizing treatment maintenance conditions 〇 〇 〇LT \ IS 〇 Alloying temperature rc 5.15E + 00 1.32E + 00 2.20E + 01 2.40E + 01 1.01E + 00 3.34E-01 〇 sm S 2.73E + 00 4.20E + 00 4.36E + 00 4.01E + 00 1.42E-01 a »V = tt Ui IK) t-Λ KJ \ U \ 00 00 Ul 〇〇gg Ο Ui L / ί Di VO KJ \ ggo 2 ο 2 Ln tensile strength / MPa K) U) K) U) U) U) U) g capacity U) 00 U) U) 〇〇UJ Elongation /% mm α oo DO DO ro > > > Inventive steel Inventive steel | Inventive steel Inventive steel 1 Inventive steel | Inventive steel comparative steel Inventive steel Inventive steel Comparative steel Inventive steel | Inventive steel i (Please read the back first Please pay attention to this page and fill in this page) This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 74 573021 A7B7 V. Description of the invention (72) (") τ 蚪» EE-Erotic Astringent Difficulty® 0 Naimoto "1.42E-01" > o 1.42X10 · 1. 〇2: to g X ΓΠ X ο ο ^ τΐ η to ON Is) to ιο U) K > to K) oo 5; 1200 1200 1200 1200 1250 1200 1210 1210 1210 1200 1200 1240 1240 1240 Heating temperature before hot rolling sss K > Ό K > OO OO 00 00 OO 00 Total thinning rate of rough hot rolling /% 1050 1050 1050 1050 1000 1030 § SS 1010 1010 1030 1030 1030 Rough hot rolling finishing temperature rc 1447 1406 1444 1444 00 00 to 1049 00 u > 00 U) 1506 1506 1 _1 00 00 Lh Private 00 Ac3 (calculated value) +50 (° 〇rc Ο κ > 00 ON o to • -J VO to to OO 00 Ul fo 0.12χ (Ac3-Ac,) + Aci (Calculated value) rc g ο 00 o 00 o 00 o ； 00 U) o oo o 00 U) o oo u > o oo Ui o 00 ο OO 00 K) o Is the lowest temperature during annealing: TmaxfC) rc to to K > to osp 1 3 U) Lh N) K) Primary cooling rate rc / sec 3 ο ON o cs o cs o Os 00 o os Ltt o Is Os g os -J o ON OO o On 〇 \ as 〇 \ oo ^ 1 > H * piece U \ Ul ui Ui s 1 ul 00 U) secondary cooling rate / ° c / s at 460 to 450 ° C 60 seconds at 460 to 450 ° C 60 seconds at 460 to 450 ° C 60 seconds at 460 To 450 ° C for 30 seconds to 465 to 460 ° C 60 seconds at 465 to 460 ° C 5 seconds at 475 to 460 ° C 3 seconds at 470 to 460 ° C 3 seconds at 470 to 460 ° C 5 seconds at 470 to 460 ° C 10 seconds at 470 to 460 120 seconds at 470 to 460 ° C 15 seconds at 450 to 460 ° c 160 seconds at 450 to 460 ° c 100 seconds including galvanizing treatment maintenance conditions KJi 〇 o to KJi Uj oo L / l Alloying temperature rc 2.05E-01 1.50E-01 7.92E- 02 2.35E-01 2.25E + 02 8.80E-03 6.48E + 00 4.95E + 00 6.01E-01 5.68E + 00 2.01E-01 3.78E + 00 4.53E-01 3.03E + 01 Expression ⑴ Calculated value # | U > Μ Lh Ui • v〇Ui o 〇 \ U \ ON K) o Ui OJ s as L / i 〇ON On On NJ 00 oo tensile strength / MPa U) 00 to UJ U) ON K) L / i to to U) WK) U) K > ho S ㉔I o 2: s K) g XXX oo " TJ • n ^ rl The present invention steel The present invention steel The present invention steel The present invention steel The present invention steel Inventive steel Inventive steel Inventive steel Inventive steel i Inventive steel (please read the notes on the back before filling this page), OK | This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) 75 573021 A7 B7 5 、 Explanation (73) Industrial application Ming provides: a high-strength high-durability hot-dip galvanized steel sheet and hot-dip galvanized steel sheet with high fatigue resistance and corrosion resistance; a high-strength hot-dip ore zinc steel sheet with excellent ductility, which Improved plating resistance after ore-free defects and severe deformation, and its manufacturing method; a high-strength and high-strength hot-dip galvanized steel sheet with high fatigue resistance and corrosion resistance; excellent appearance and workability High-strength hot-dip galvanized steel sheet, which can suppress the occurrence of non-plating defects, and a manufacturing method thereof; and a high-strength hot-dip zinc-annealed steel sheet and a high-strength hot-dip zinc-steel sheet, which can suppress non-plating defects. Dip plating defects and surface defects have corrosion resistance, especially corrosion resistance and high ductility in a gas ion environment, and a method for manufacturing the same. 76 (Please read the precautions on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 (210X297 mm)

Claims (1)

Sixth, the scope of application for patents No. 091112291 Patent application for amendments to the scope of patent applications This amendment date: November 1992 1 · A high-strength high-durability galvanized steel plate or alloyed fusion plating with excellent fatigue resistance and corrosion resistance Zinc steel plate, which has a molten zinc coating on the surface of the main phase formed by the steel plate, is characterized in that the maximum depth of the grain boundary oxide layer generated at the interface between the plating layer and the main phase is less than 0.5 microns. 2 · —A type of high-strength, high-strength, hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent fatigue resistance and corrosion resistance, which has a hot-dip galvanized layer on the surface of the main phase composed of the steel sheet, which is characterized by : The maximum depth of the grain boundary oxide layer generated at the interface between the plating layer and the main phase is "below" and the average particle size of the main phase in the microstructure of the main phase is below 20 microns. The two-strength, high-strength, hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent fatigue resistance and corrosion resistance in item 1 of the scope of the patent application has a hot-dip galvanized layer on the surface of the main phase composed of the steel sheet. It is characterized in that the maximum thickness of the grain boundary oxide layer generated at the interface between the plating layer and the main phase divided by the average particle diameter of the main phase in the main phase microstructure is less than 0.1. 4. If applied The hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with the same strength and ductility which has excellent fatigue resistance and corrosion resistance in the second item of the patent scope, are those with a hot-dip galvanized layer on the surface of the main phase of the steel sheet. Its characteristics On: the maximum thickness of the grain boundary oxidized layer plating layer and the interface of the main phase arising divided by the average grain of the main phase of the main phase in the microstructure 573021 A8 6. Scope of patent application The value obtained is controlled below 0.1. 5. The high-strength, high-strength, hot-dip galvanized steel sheet or alloyed galvanized steel sheet with excellent fatigue resistance and corrosion resistance, such as in item 1 of the scope of patent application, is characterized in that the steel sheet contains 50% of the microstructure. To 97% by volume of ferrite or ferrite and bainite as the main phase, and a total of 3 to 50% by volume of either or both of martensite and austenite as the second phase phase. 6. The south-strength, south-strength, smelting-bonding zinc steel sheet or alloyed galvanized steel sheet with excellent fatigue resistance and corrosion resistance, such as the item 2 in the scope of patent application, is characterized in that the steel sheet contains 5% of the microstructure. 0 to 97% by volume of ferrite or ferrite and bainite as the main phase, and a total of 3 to 50% by volume of any one or both of martensite and austenite as the first phase Two-phase 0 7 · As described in item 3 of Shengu's patent scope, it has excellent strength and fatigue resistance, and has a south strength and ductile molten galvanized steel sheet or alloyed zinc-zinc steel sheet, which is characterized in that the steel sheet is in a microstructure Contains 50 to 97% by volume of iron emulsion or ferrite and bainite as the main phase, and contains a total of 3 to 50% by volume of any of martensite and austenite or Both as the second phase. 8. The south strength and south ductility molten galvanized steel sheet or alloyed galvanized steel sheet with excellent fatigue resistance and corrosion resistance, such as item 4 of the scope of patent application, characterized in that the steel sheet contains 50% in the microstructure. To 97% by volume of ferrite or ferrite and bainite as the main phase, and a total of 3 to 50% by volume of either or both of martensite and austenite as the first phase This paper size applies to China National Standard (CNS) A4 specifications (210 fathers 297 males | Ding IIII Binding f I 78 9 As described in item 1 or 2 of the main π patent on φ, the southern strength and high ductility fused galvanized steel sheet or alloyed fused galvanized steel sheet with excellent fatigue resistance and corrosion resistance is characterized in that the plating layer contains: : O.ool to ο · 5% by mass. Junction: 0.001 to 2% by mass. The difference is composed of zinc and unavoidable impurities; and the silicon content of the steel plate (mass percentage), manganese content (gamma) and mass content. ζ (mass percentage), and the aluminum content A (mass percentage) and manganese content B (mass percentage) of the plating layer satisfy the following equation (1): 3_ (X + y / 1〇 + Z / 3) -12.5x (A_B)-0 ... (1). 10. A high-strength, high-ductility, hot-dip galvanized steel sheet or an alloyed hot-dip galvanized steel sheet having excellent fatigue resistance and corrosion resistance, as in item 9 of the scope of the patent application, characterized in that the coating layer contains iron by mass 5 to 2000 /. . 11. · A high-strength hot-dip galvanized steel sheet or alloyed galvanized steel sheet with excellent plating adhesion and ductility during high grinding. The quality is based on the paper standard and applies to Chinese National Standard (CNS) A4 specifications ( 210 × 297 mm) '' '^ -79-Carbon: 0.0001 to 0.3%, Silicon: 0.01 to 2.5%, Manganese: 0.01 to 3%, Aluminum: 0.001-4%, Scale: 0.0001 to 0.1%, and Sulfur: 0.0001 ~ 0.01%, 573021 AB c D 6. The difference in the scope of patent application is composed of iron and unavoidable impurities, and the steel plate has a plating layer on the surface. The plating layer contains: Inscription: 0.001 ~ 4% and Veng Meng · 0.001 ~ 2%, the balance is composed of zinc and unavoidable impurities; it is characterized by: silicon content of steel (mass percentage), manganese content Υ (mass 1 percentage) and aluminum content ζ (mass percentage), And the inscription content A (mass percentage) and manganese content B (mass percentage) of the plating layer satisfy the following equation (1) 'and the microstructure of the steel plate has ferrite with a volume ratio of 70 to 97 // as the main Phase, whose average particle size is not greater than 20 microns, and the second It is composed of austenite and / or martensite with a volume ratio of 3 ~ 30%, and the average particle size of the second phase is not more than 10 microns; 3- (X + Y / l〇 + Z / 3) -12.5 x (AB) gO… ⑴. 12 · —A high-strength molten galvanized steel sheet or alloyed molten galvanized steel sheet with excellent plating adhesion and ductility during high grinding, which contains, by mass, carbon: 0.0001 to 0.3%, silicon: 0.01 ~ 2.5%, Meng: 0.01 ~ 3%, Aluminum: 0.001 ~ 4%, Obstacles: 0.0001 ~ 0.1% and Sulfur · 0.0001 ~ 0.01%, and steel contains one or more of the following ingredients in mass percentage ' That is, “· This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) 80 573021 8 8 8 8 AB c D VI. Patent application scope Chromium: 0.001 to 25%, nickel: 0.001 to 10%, copper. · 0.001 to 5%, cobalt: 0.001 to 5%, tungsten: 0.001 to 5%, sharp: 0.001 to 1%, titanium: 0.001 to 1%, vanadium: 0.001 to 1%, zirconium: 0.001 to 1%, hafnium: 0.001 to 1%, tantalum: 0.001 to 1%, boron: 0.0001 to 0.1%, yttrium ... 0.0001 to 1%, thallium: 0.0001 to 1%, mom: 0.0001 to 1%, magnesium: 0.0001 to 1%, and thorium ... · 0 · 000 1% The difference is iron and unavoidable impurities; and the surface of the steel plate has a plating layer, which is based on mass percentage Contains: Aluminum: 0.001 to 0.5% and Manganese: 0.001 to 2%, the difference is zinc and unavoidable impurities; it is characterized by: silicon content x (mass percentage), manganese content Y (mass percentage) and aluminum content Z of steel (Mass percentage), and the paper size of the coating is applicable to the Chinese National Standard (CNS) A4 specification (210 X297 mm) 81 573021 AB c D 6. The scope of patent application for aluminum content A (mass percentage) and manganese content B ( (Mass percentage) satisfies the following private formula (1) 'and the microstructure of the steel plate has 70% to 97% by volume of ferrite as the main phase, the average particle size of which is not greater than 20 microns, and the second phase is It is composed of austenite and / or martensite with a volume ratio of 3 ~ 30%, and the average particle size of the second phase is not more than 10 microns; 3 · (χ + Υ / 1〇 + Z / 3) · 12 · 5χ (Α-Β) -〇 ... ⑴. 13. High strength molten galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent plating adhesion and ductility during high-level grinding in accordance with item 丨 丨 of the patent application, characterized in that the plating layer further includes 5 To 20% by mass of iron. 14. High-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent plating adhesion and ductility during high-level grinding of the patent application No. 12 is characterized in that the coating layer further comprises 5 to 2000 /. Mass ratio is iron. 15. For high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent plating adhesion and ductility during high-level grinding in any one of the patent applications 丨 丨 ～ 丨 々, among which The microstructure is based on ferrite with a volume ratio of 50 to 95% as the main phase, and its average particle size is not more than 20 U m '. The second phase contains austenite and 3 to 30% by volume. / Or martensite, the average particle size of these are less than 10 microns; and contains bainite with a volume ratio of 2 to 47%. 16. For high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent adhesion and ductility during high-level grinding in any one of the patent applications No. 丨 丨 to 14, it is characterized by ... The paper size that composes the second phase of the steel plate is applicable to Chinese national standards (ct ^ Ta4 specification 0 × 297). 82 573021 A8 B8 C8 D8 VI. Patent application scope The average austenite and / or martensite grain size is the average ferrite The particle size is 0.01 to 0.7 times. 17. If high-level hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent bond adhesion and ductility during high-level grinding of item 11 in the scope of patent application, it is characterized in that the steel further contains a percentage by mass Molybdenum is 0.001 to 5%. 18. For high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent plating adhesion and ductility during high-level grinding under the scope of patent application No. 12, it is characterized in that the steel sheet further contains 0.001 to 5% of molybdenum. 19. For high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent plating adhesion and ductility during high-level grinding of the patent application No. 丨 3, it is characterized in that the steel sheet further contains a percentage by mass Molybdenum is 0.001 to 5%. 20 · For high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent plating adhesion and ductility during high-level grinding in accordance with item 14 of the patent application, it is characterized in that the steel sheet further contains 0.001 to 5% of molybdenum. 21. A high-strength hot-dip galvanized steel sheet or an alloyed galvanized steel sheet with excellent plating adhesion and ductility when highly grounded according to any one of the ns14 items in the scope of patent application, characterized in that: Shi Xi content is 0.001 to 2.5%. 22 · —A kind of high-strength hot-dip galvanized steel sheet or high-strength alloyed hot-dip galvanized steel sheet with excellent appearance and workability, which contains ... This paper size is applicable to Chinese National Standard (CNS) A4 · Specifications (21〇 × 297) ) Packing 83 573021 AB c D VI. Patent application scope Carbon: 0.0001 to 0.3%, silicon: 0.001 to 0.1% or less, manganese: 0.01 to 3%, aluminum: 0.001 to 4%, molybdenum: 0.001 to 1%, phosphorus: 0.0001 ~ 0.3% and sulfur: 0.0001 ~ 0.1%, the balance is composed of iron and unavoidable impurities; and there is a plating layer on the surface of the steel plate, which layer contains in mass percentage: manganese: 0.001 ~ 3%, aluminum : 0.001 to 4%, molybdenum: 0.0001 to 1%, and iron: 5 to 20%, the balance is composed of zinc and unavoidable impurities; it is characterized by the manganese content X (mass percentage) and silicon content Y (mass percentage) of the steel ), And the aluminum content Z (mass percentage) of the plating layer satisfies the following equation (2): 0 · 6 · (χ / 18 + Υ + Z) ^ 0. &Quot; (2). 23. —A kind of high-strength hot-dip galvanized steel sheet or high-strength alloyed hot-dip galvanized steel sheet with excellent appearance and processability, which contains, by mass percentage: carbon: 0.0001 to 0.3%, silicon: 0.001 to 0.1% or less, manganese ： 0.01 ~ 3%, this paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297mm) 573021 AB c D a, patent application scope aluminum: 0.001 ~ 4%, molybdenum: 0.001 ~ 1%, phosphorus: 0.0001 ~ 0.3% and sulfur: 0.0001 to 0.1%, and more than one or two of the following components in terms of mass percentage: chromium: 0.001 to 25%, nickel: 0.001 to 10%, copper: 0.001 to 5%, cobalt: 0.001 to 5%, tungsten: 0.001 to 5%, niobium: 0.001 to 1%, titanium: 0.001 to 1%, vanadium: 0.001 to 1%, zirconium: 0.001 to 1%, hafnium: 0.001 to 1%, tantalum: 0.001 to 1%, boron: 0.0001 to 0.1%, yttrium: 0.0001 to 1%, chain: 0.0001 to 1%, calcium: 0.0001 to 1%, magnesium: 0.0001 to 1%, and thallium: 0.0001 to 1%, the difference is iron and cannot Avoided impurities; and the surface of the steel plate has a plating layer, the layer is based on the mass percentage of the paper size Using China National Standard (CNS) A4 specification (210X297 mm) 85 573021 ABCD 6. The scope of patent application contains: manganese: 0.001 to 3%, aluminum: 0.001 to 4%, molybdenum: 0.0001 to 1% and iron: 5 to 20%, the difference is zinc and unavoidable impurities; It is characterized by: if the manganese content in the steel is x (mass percentage), the silicon content in the steel is γ (mass percentage), and the aluminum content of the coating is Z , Then X, Y, and Z satisfy the following equation (2): 0.6- (X / 18 + Y + Z)-0… (2). 24. A type of high-strength hot-dip galvanized steel sheet or high-strength alloyed hot-dip galvanized steel sheet with excellent appearance and processability, which are contained in mass percentage: carbon ·· 0.0001 to 0.3%, silicon: 0.001 to 0.1% or less, Manganese: 0.01 to 3%, aluminum: 0. 0 (Η to 4%, molybdenum: 0.001 to 1%, phosphorus: 0.0001 to 0.3%, and sulfur: 0.0001 to 0.1%, the difference is iron and unavoidable impurities; and steel plates The surface has a plating layer. The layer contains, by mass percentage, manganese: 0.001 to 3%, aluminum ... 0.001 to 4%, and the paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm). 86 Indium ... 0.0001 to 1% and iron ... 5 to 20%, the difference is zinc and unavoidable impurities; It is characterized by: if the manganese content in the steel is χ (mass percentage), the silicon content in the steel is Υ (Mass percentage), and the aluminum content of the plating layer is Z, then X, γ, and ζ satisfy the following equation (2): 0.6- (X / 18 + Υ + Z) -0 (2). 25. A type of high-strength hot-dip galvanized steel sheet or high-strength alloyed hot-dip galvanized steel sheet with excellent appearance and workability, which are contained in mass percentage: carbon: 0.0001 to 0.3%, silicon: 0.001 to 0.1% or less, : 0.01 to 3%, aluminum: 0.001 to 4%,! Mesh: 0.001 to 1%, stone ball: 0.0001 to 0.3%, and sulfur: 0.0001 to 0.1%, and further contains one or two or less kinds of ingredients in mass percentage : Zhang scale is applicable to A4 specification 1210X297.) Chromium: 0.001 · ~ 25%, Nickel: 0.001 '~ 10%, Copper: 0.001 ~ 5%, Cobalt: 0.001 ~ 5%, Ore: 0.001 ~ 5%, Niobium: 0.001 to 1%, Titanium: 0.001 to 1%, 87 573021 AB c D 6. Patent application scope Vanadium: 0.001 to 1%, Zirconium: 0.001 to 1%, Thallium: 0.001 to 1%, Button: 0.001 to 1 %, Shed: 0.0001 ~ 0.1%, Yttrium: 0.0001 ~ 1%, Baht: 0.0001 ~ 1%, Calcium: 0.0001 ~ 1%, Magnesium: 0.0001 ~ 1% and Thallium: 0.0001 ~ 1%, the difference is iron and unavoidable Impurities; and the surface of the steel plate has a plating layer, the layer contains: manganese: 0.0 01 to 3%, aluminum: 0.001 to 4%, molybdenum: 0.0001 to 1%, and iron: 5 to 20%, the difference is zinc and unavoidable impurities; it is characterized by: if the manganese content in the steel is X (mass Percentage), the silicon content in the steel is Y (mass percentage), and the aluminum content in the plating layer is Z, then X, Y, and Z satisfy the following equation (2): 0.6- (X / 18 + Y + Z)-0 …(2). 26. — A type of high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent corrosion resistance, high strength and high ductility, in terms of mass percentage. Contains this paper. Applicable to China National Standard (CNS) A4 (210X297). %) 88 573021 Carbon: 0.0001 to 0.3%, silicon: 0.001 to 0.1% or less, fierce: 0.001 to 3%, aluminum: 0.001 to 4%, molybdenum: 0.001 to 1%, phosphorus: 0.001 to 0.3%, and sulfur: 0.0001 to 0.1% difference It consists of iron and unavoidable impurities; and has a plating layer on the surface of the steel plate, which contains by mass: aluminum: 0.001 to 4% and iron: 5 to 20%; the difference is made of zinc and unavoidable Impurity composition; It is characterized in that the aluminum content A (mass percentage), platinum content B (mass percentage) and molybdenum content c (mass percentage) of the plating layer satisfy the following equation (3); and the microstructure of the steel It is a composite structure with 50 to 97% by volume of ferrite or ferrite and bainite as the main phase 'and the difference between 3 to 50% by volume of martensite and retained austenite Either or both; 100- (A / 3 + B / 6) / (C-6) 2 0.01… (3). 27 · —A kind of high-strength hot-dip galvanized steel sheet or high-strength alloyed hot-dip galvanized steel sheet with excellent corrosion resistance, in terms of mass percentage containing: Carbon ·· 0.0001 ~ 0.3%, This paper size applies to Chinese National Standard (CNS) A4 specifications (210X297 mm) 89 573021 A8 B8 C8 D8 VI. Patent application scope Silicon: 0.001 to 0.1% or less, Manganese: 0.001 to 3%, Aluminum: 0.001 to 4%, Molybdenum: 0.001 to 1%, fill 0.0001 ~ 0 · 3% and sulfur: 0.0001 ~ 0.1%, and further contains one or two of the following ingredients in terms of mass percentage: chromium: 0.001 to 25%, nickel: 0.001 to 10%, copper: 0.001 to 5%, cobalt : 0.001 to 5%, iron · 0.001 to 5%, niobium: 0.001 to 1%, titanium: 0.001 to 1%, vanadium: 0.001 to 1%, wrong: 0.001 to 1%, thallium: 0.001 to 1%, button: 0.001 to 1%, boron: 0.0001 to 0.1%, B: 0.0001 to 1%, chain: 0.0001 to 1%, calcium: 0.0001 to 1%, magnesium: 0.0001 to 1%, and thallium: 0.0001 to 1%, this paper Standards are applicable to China National Standard (CNS) A4 (21 0X297 mm) -90- 573021 6. The difference in the scope of patent application is iron and unavoidable impurities; the surface of the steel plate has a plating layer, which contains in mass percentage: aluminum: 0.001 to 4% and iron: 5 to 20%, the difference is zinc And unavoidable impurities; characterized in that if the content of A in the ore cover is A (mass percentage), the content of molybdenum is B (mass percentage), and the content of molybdenum in steel is c, then A, B and C satisfy As shown in the following formula (3); and the microstructure of the steel is a composite structure, the ferrite or ferrite and bainite account for 50 to 97% by volume, and the difference is 3 to 50%. Either or both of martensite and retained austenite in a volume ratio; 100- (A / 3 + B / 6) / (C-6) -〇_〇l ... (3). 28 · —A high-strength, high-strength fused steel sheet or a high-strength alloyed fused-galvanized steel sheet with excellent corrosion resistance, containing by mass: carbon: 0.0001 to 0.3%, silicon: 0.001 to less than 0.1%, Meng: 0.001 to 3%, aluminum: 0.001 to 4%, molybdenum: 0.001 to 1%, stone ball: 0.001 to 0.3%, and sulfur: 0.0001 to 0.1%. The difference is composed of iron and unavoidable impurities. The surface is provided with a plating layer, which contains, by mass percent, the Paleo-Decean series: 91 573021 A8 B8 Patent application scope Inscription: 0.001 to 4% and iron: less than 5%, the balance is composed of zinc and unavoidable impurities; It is characterized by: aluminum content A (mass percentage), molybdenum containing SB (mass percentage) The steel's molybdenum content c (mass percentage) satisfies the following equation (3); and the microstructure of the steel is a composite structure, with ferrite or ferrite and bainite occupying 50 to 97% by volume as The main phase, and the difference is one or both of martensite and retained austenite, which account for 3 to 50% by volume; 100- (A / 3 + B / 6) / (C-6) -0.01 … (3). 29. — A high-strength hot-dip galvanized steel sheet or a high-strength alloyed hot-dip galvanized steel sheet with excellent corrosion resistance, which are contained in mass percentage: carbon: 0.0001 to 0.3%, silicon: 0.001 to 0.1% or less, manganese: 0.001 ~ 3%, Aluminum: 0.001 ~ 4%, Molybdenum: 0.001 ~ 1%, Phosphorus: 〇〇ΟΟίΠ ~ 0.3%, Sulfur: 0.0001 ~ 0.1%, and in mass percentage, it contains one or more of the following ingredients: Chromium : 0.001 to 25%, nickel: 0.001 to 10%, copper: 0.001 to 5%, cobalt: 0.001 to 5%, the size of this paper applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) 92 573021 AB c D, Patent application scope Tungsten: 0.001 to 5%, Niobium: 0.001 to 1%, Titanium: 0.001 to 1%, Vanadium: 0.001 to 1%, Thallium: 0.001 to 1%, Thallium: 0.001 to 1%, Button: 0.001 to 1 %, Boron: 0.0001 to 0.1%, yttrium: ο · οοοι to 1%, chain: 0.0001 to 1%, calcium: 0.0001 to 1%, magnesium: 0.0001 to 1%, and thallium: 0.0001 to 1%, the difference is iron and Inevitable impurities; and the surface of the steel plate has a plating layer, which contains Aluminum: 0.001 ~ 4% and iron: 5% or less, the difference is zinc and unavoidable impurities; it is characterized by ... if the aluminum content in the plating layer is A (mass percentage), the indium content is B (mass percentage ) And the molybdenum content in the steel is C, then A, B and c satisfy the following equation (3); and the microstructure of the steel is a composite structure, with ferrite or ferrite with a volume ratio of 50 to 97% Bainite and bainite are the main phases, and the difference is between 3 and 5000/00 volume ratio of martensite and this paper size applies Chinese National Standard (cns) a4 size ui〇X297 public variable y ο 73 5 7T. Either or both of the retained austenite in the patent application scope; 100- (A / 3 + B / 6) / (C-6) 2 0.01… (3) 〇30. The high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet having excellent appearance and processability according to any one of items 丨 to "17, 20, and 22 to 29, which is characterized by: The microstructure is a composite structure, which consists of 50 to 97% by volume of ferrite or ferrite and bainite as the main phase 'and the difference is composed of martensite and residual austenite which account for 3 to 50% by volume. Either or both of the martensite. 31. If the scope of patent application is any of items ^ to 丨, items 17 to 20, and items 22 to 29, it has excellent appearance and high workability. The strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet is characterized in that the microstructure of the steel sheet is mainly composed of ferrite with a volume ratio of 70 to 97%, and its average particle size is less than 20 microns; The two-phase system is composed of austenite and / or martensite with a volume ratio of 3 to 30%, and its average particle size is less than 10 microns. A high-strength hot-dip galvanized steel sheet or an alloyed hot-dip galvanized steel sheet having excellent appearance and workability according to any one of the following features: the second phase of the steel sheet is austenite, and the carbon content of the steel is C (mass percentage), The manganese content Mη (mass percentage), the volume percentage of austenite νγ (expressed as a percentage), and the volume percentage of ferrite and bainite Va (expressed as a percentage) satisfy the following equation (4): (Vy + Va) /VyxC+Mn/8^2.0 ... (4) 33. If the scope of patent application is any of items 11 to 4, 4, 17 to 20, and 22 to 29, it has excellent appearance and processability. The high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet is characterized in that the paper size of the steel sheet is applicable to the Chinese National Standard (CNS) A4 · Specifications (210X297 mm) 94 573021 A8 B8 C8 6. Scope of patent application The microstructure is mainly composed of ferrite with a volume ratio of 50 to 95%, and its average particle size is not greater than 20 microns; and it contains austenite and / or 3 to 30% by volume. As the second phase, martensite has an average particle size of not more than 10 microns, and further contains bainite of 2 to 47% by volume. 34. If the scope of application for patents is n to 14, I to 20 and 22 to 29 The high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet having high corrosion resistance according to any one of the items, characterized in that the average grain size of austenite and / or martensite in the second phase of the steel sheet is ferrite The average volume particle diameter is from 0.01 to 0.6 times. 35. Two-strength molten galvanized steel sheet with excellent plating adhesion and ductility at the time of high grinding, such as those in the scope of patent applications Nos. 11 to 14, 17 to 20, and 22 to 29, or The alloyed molten ore zinc steel plate is characterized in that the plating layer further contains one or more of the following in terms of mass: I Ca: 0.001 to 〇〇〇 / 0, Mg: 0.001 to 3%, Si: 0.001 to 0.10 / 0, Mo: 0.001 to 0.1%, W: 0.001 to 0.10 / 0, Zr: 0.001 to 0.1%, Cs: 0.001 to 0.1%, Rb: 0.001 to 0.10 / 〇, K: 0.001 to 0.1〇 / 〇, Ag: 0.001 to 5%, the standard and Zhang scales are applicable to China National Standard (CNS) A4 · Specifications (210X297 mm) 95 573021 AB c D Patent application scope Na: 0.001 to 0.05 %, Cd: 0.001 to 3%, Cu: 0.001 to 3%, Ni: 0.001 to 0.5%, Co: 0.001 to 1%, La: 0.001 to 0.1%, T1: 0.001 to 8%, Nd: 0.001 to 0.1% , Y: 0.001 to 0.1%, In: 0.001 to 5%, Be: 0.001 to 0.1%, Cr: 0.001 to 0.05%, Pb: 0.001 to 1%, Hf: 0.001 to 0.1%, Tc: 0.001 to 0.1%, Ti: 0.001 to 0.1%, Ge: 0.001 to 5%, Ta: 0.001 to 0.1%, V: 0.001 to 0.2%, and B: 0.001 to 0.1% 〇36. Such as the scope of patent application 11th to 14th Item, items 17 to 20, and item 22 to 29 of the high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet having excellent fatigue resistance and corrosion resistance, which are characterized by: Si02, MnO contained in steel in the range of the steel plate interface to a depth of 10 μηι This paper size is applicable to Chinese National Standard (CNS) A4 specifications (21 OX297 mm) 96 573021 A8 B8 Patent application scope and i or 2 in Al203 The total amount of more than one of these types is 0.1% to 70% by area ratio, and satisfies Mn0 (area percentage) + Al203 (area percentage) / Si02 (area percentage) ^ 0.1. 3Into the high-strength hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent fatigue resistance and surplus resistance, as members of the U.S. Patent Application Nos. U-14, 17-17 (2), and 22-29 Zinc steel plates are characterized by: Υ203, Zr〇2, Hf〇2, Ti02, La2 03, Ce2 03 contained in steel ranging from the plating layer / steel interface to a depth of 10 μm. The total amount of one or more of Ce2, Ca0, and Mg0 is 0.0001 to 10.0% in terms of area ratio. 38 · —A method for manufacturing a hot-dip galvanized steel sheet or an alloyed hot-dip galvanized steel sheet with high plating adhesion and ductility during high grinding. Its special feature is that the scope of patent application will be the first! The cast flat steel blanks composed of the steel components of items 14 to 17, 17 to 20, and 22 to 29 are directly cast or temporarily cooled and then heated again, and the hot-rolled steel sheet that is curled after hot rolling is pickled and then cold-rolled In other words, it is then burned at a temperature ranging from 0.1x (AC3_Aci) + AcJ ° C) to Ac3 + 50 (° C) for 10 seconds to 30 minutes, and then at 0.1 to 10 ° c / second. The cooling rate is reduced to 650 to 700. [The temperature range, and then cooled to the plating bath temperature ~ plating bath temperature + 100 ° C at a rate of 1 toloot: / second, and the zinc plating bath temperature to the zinc plating bath temperature + 100 ° C temperature range Maintain 1 to 3,000 seconds (including the subsequent impregnation time), immerse in a zinc plating bath, and then cool to room temperature; or immerse in a zinc plating bath, perform alloying treatment at 300 to 550 ° C, and then cool To room temperature. This paper size applies to China National Standard (CNS) A4 (210X297 mm) Binding.) 97 573021 AB c D VI. Patent application scope 39 · —A patent application scope of any one of items 1 to 14, 17 to 20, and 22 to 29 with excellent appearance and processability A method for manufacturing a high-strength hot-dip galvanized steel sheet or an alloyed hot-dip galvanized steel sheet, which is characterized in that: a cast flat steel blank consisting of a steel sheet component according to any one of claims 1 to 29 is directly cast or temporarily cooled and then re-cooled Heat to 80 ° C to 1,250 ° C to 880 ° C to 1,100 ° C. (: After the hot rolling is completed, the rolled hot-rolled steel sheet is pickled and cold-rolled, and then it is not less than 0.1x (Ac3-Ac 丨) + Aci (° C) to Ac3 + 50 (° C) or less The temperature range is blunt for 10 seconds to 30 minutes, and then cooled to a temperature range of 650 to 700 ° C at a cooling rate of 0 · m to 10 ° C / second, followed by 0.1 to 100. () / second The rate is cooled to the temperature of the plating bath _50 ° C to the temperature of the plating bath +5 (^ c) after immersion in the plating bath, and then maintained at a temperature of -50 ° C to + 50 ° C After the temperature range is 2 to 200 seconds (including the immersion time), it is cooled to room temperature; or after being immersed in a zinc plating bath, it is alloyed at 300-50 ° C and then cooled to room temperature. 40 ·· kind A method for manufacturing a high-strength, high-strength, hot-dip galvanized steel sheet or alloyed hot-dip galvanized steel sheet with excellent corrosion resistance, which is excellent in corrosion resistance, according to any one of the scope of patent applications, items 17 to 20, and items 22 to 29, is characterized in that : Casting the flat steel billet consisting of the steel plate components in any of the scope of patent applications Nos. 1 to 14, 17 to 20, and 22 to 29 directly after casting or temporarily cooling, and then heating it to 1,200 Up to 1,300 ° C, rolling at a temperature of 1000 ° C to 1150 ° C with a total thinning rate of 60 to 99% by rough hot rolling, and then pickling and rolling of the hot rolled steel sheet that has been rolled and curled Cold-rolled, and the paper size above mxiAc ^ -AcO + AcfC) to 803 + 50 (. (:) below applies to Chinese National Standard (CNS) A4 · Specification (210X297 mm) 98 573021 6. Application for patent Range AB c D After 10 to 30 minutes of incubation, if the highest temperature reached during inactivation is Tmax (° C), after inactivation, Tmax / 1000 to Tmax / i0 ° C / The cooling rate in seconds is cooled to a temperature range of Tmax-200 to Tmax-100t, and then cooled to a temperature range of plating bath temperature -30 ° C to plating bath temperature + 50 ° C at a cooling rate of 0.1 to 100 ° C / second, Then maintain the temperature range from -30 ° C to + 50 ° C in the ore bath and the temperature range is 2 to 200 seconds (with impregnation time), and then cool the steel plate to room temperature; Alloying treatment at 550 ° C, and then cooling to room temperature. 41 · A high-strength, high-ductility molten bond zinc steel plate or alloy with excellent financial fatigue and financial properties. A method for manufacturing a galvanized steel sheet, which is characterized in that: a cast flat steel blank consisting of steel sheet components in any one of claims 1 to 14, 17 to 20, and 22 to 29 is directly cast or temporarily cooled After heating again, the hot-rolled and crimped steel sheet is pickled and cold-rolled, and then the maximum temperature when it is blunt is 0.1x (Ac3-Ac 丨) + Ac] (° C) or more to Ac3 + 30 (° C ) After it is blunt at a temperature in the following range, it is cooled to a temperature range of 650 to 710 ° C at a cooling rate of 0.1 to 10 ° C / sec, and then 1 to 100. The cooling rate of [] / sec was cooled to the temperature of the galvanizing bath to the temperature of the galvanizing bath + 100. (:, Then maintain the temperature range of galvanizing bath to Qianci bath temperature + 100 ° C for 1 to 300 seconds (including the subsequent immersion time), dip in the galvanizing bath, and then cool to room temperature; or After being immersed in the zinc bond bath, the alloy is treated at 300 ~ 550 ° C, and then cooled to room temperature. 0 Binding f This paper size applies to China National Standard (CNS) A4 (210X297). 99