WO1995021947A1 - Tole d'acier revetue de zinc allie fondu sous haute tension, a excellentes caracteristiques de zingage, et son procede de fabrication - Google Patents
Tole d'acier revetue de zinc allie fondu sous haute tension, a excellentes caracteristiques de zingage, et son procede de fabrication Download PDFInfo
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- WO1995021947A1 WO1995021947A1 PCT/JP1995/000196 JP9500196W WO9521947A1 WO 1995021947 A1 WO1995021947 A1 WO 1995021947A1 JP 9500196 W JP9500196 W JP 9500196W WO 9521947 A1 WO9521947 A1 WO 9521947A1
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- steel sheet
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- dip galvanized
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 238000007747 plating Methods 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 9
- 238000005275 alloying Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 26
- 239000008397 galvanized steel Substances 0.000 claims description 26
- 238000000137 annealing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000005097 cold rolling Methods 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 238000005246 galvanizing Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 238000005554 pickling Methods 0.000 claims description 3
- 238000001953 recrystallisation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000011701 zinc Substances 0.000 abstract description 8
- 229910052725 zinc Inorganic materials 0.000 abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000012545 processing Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 239000010960 cold rolled steel Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 229910052758 niobium Inorganic materials 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
- Y10T428/12799—Next to Fe-base component [e.g., galvanized]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12951—Fe-base component
Definitions
- the present invention proposes a high-strength alloyed hot-dip galvanized steel sheet and a method for manufacturing the same, which are mainly used for automobile bodies and are suitable for applications such as bending, press forming, and drawing.
- Back view technique
- the present invention is intended to advantageously solve the above-mentioned problems, and is a high-strength alloyed hot-dip galvanized product having excellent workability such as press molding suitable for automobiles and excellent clinging characteristics.
- the purpose is to propose a steel sheet with steel sheet and a method for manufacturing the same.
- S i as a reinforcing component, identified the interrelationship between S i and M n, and have a tensile strength of 400, which has both good plating characteristics and press formability. It was found that a high-strength alloyed hot-dip galvanized steel sheet of MPa or more can be obtained.
- the gist of the present invention is as follows.
- Mn 0.1 mass% or more, 2.5 mass3 ⁇ 4i or less
- T i 0.003 mass% or more, 0.10 mass or less
- Nb 0.003 mass or more, 0.10 mass% or less
- S i and Mn are contained under the relation of the following formula (1), and the balance is alloyed and melted with a Fe content of 9 to 12% on the surface of the steel sheet having the composition of Fe and unavoidable impurities.
- High-tensile alloyed hot-dip galvanized steel sheet with a zinc-plated layer and excellent plating characteristics (first revealed).
- the C content is 0.0005 mass3 ⁇ 4; or more and 0.004 mass% or less.
- a high-tensile alloyed hot-dip galvanized steel sheet having an S i content of 0.2 mass% or more and 2.5 mass% or less and having excellent clinging characteristics (third invention).
- a high-strength alloyed hot-dip galvanized steel sheet having an Mn content of 0.2 mass3 ⁇ 4 or more and 2.5 mass3 ⁇ 4i or less and having excellent fitting characteristics (fourth invention).
- a high-strength alloyed hot-dip galvanized steel sheet having a B content of 0.0005 mass% or more and 0.0050 mass% or less and having excellent fitting characteristics (5th invention).
- a high-strength alloyed hot-dip galvanized steel sheet having a P content of 0.04 mass% or more and 0.15 mass3 ⁇ 4; or less and having excellent clinging characteristics (sixth invention).
- a high-tensile alloyed hot-dip galvanized steel sheet having an A1 content of 0.005 mass% or more and 0.06 mass! 3 ⁇ 4 or less and having excellent binding characteristics (8th invention).
- a high-strength alloyed hot-dip galvanized steel sheet having an N content of 0.0040 mass% or less and excellent fitting characteristics (9th invention).
- Mn 0.1 mass% or more, 2.5 mass% or less
- T i 0.003 mass% or more, 0.10 mass% or less
- Nb 0.003 mass3 ⁇ 4 or more, 0.10 mass% or less
- B 0.0005mass% or more, 0.0080mass% or less
- Al 0.005 mass% or more, 0.10 mass or less
- Si and Mn are contained under the relation of the following formula (1), and the balance is made of steel slab having the composition of Fe and unavoidable impurities, and hot-rolled at 750 ° C or higher. Finish rolling is completed in a temperature range of 100 ° C or less, and cold rolling is performed in a range of 60% or more and 95% or less after pickling to obtain a cold-rolled plate, and the cold-rolled plate is continuously melted.
- a method for manufacturing a high-tensile alloyed hot-dip galvanized steel sheet having excellent binding characteristics which is characterized by being alloyed by heating for 14 seconds or more and 28 seconds or less in a temperature range of 450-550 ° C.
- the sheet bar having the above composition is hot-rolled at a finishing rolling temperature in the range of 820 to 910 ° C, and then cold-rolled in the range of 75 to 85% reduction after pickling.
- the hot-dip galvanized line was annealed in the temperature range of 780 to 890 ° C, then rapidly cooled to the temperature range of 450 to 500 ° C, and the hot-dip galvanized bath containing 0.13 mass% of A1. It is manufactured by immersing it in a steel sheet and then subjecting it to an alloying treatment in the temperature range of 450 to 550 (Fe content in the plating layer is about 10%).
- the plating characteristics are judged by visual appearance (non-plating) and powder resistance by 90 ° bending test. It was evaluated by judging the ring property.
- Table 1 summarizes the results of investigating the relationship between the Si and Mn contents and the clinging characteristics of these steel sheets.
- the content of C needs to be 0.0050 mass% or less, preferably 0.00 40 mass% or less. , More preferably, it is an ultra-low carbon steel of 0.0030 mass% or less.
- the C content is limited to 0.0005mass% or more and 0.0050mass% or less, but preferably 0.000005mass% or more and 0.00411335% or less, more preferably 0.000005mass% or more and 0.0030mass%. It is as follows.
- the S i has the effect of reducing the deterioration of workability and strengthening the steel, and the content must be 0.1 mass% or more. However, if it exceeds 2.5 mass%, the secondary processing brittleness will deteriorate. Therefore, the S i content is limited to 0.1 mass% or more and 2.5 mass% or less. However, from the purpose of the present invention of strengthening steel while maintaining workability by utilizing S i, the S i content when the tensile strength is 400 MPa class or more is preferably 0.2 mass% or more. , 2.5 mass% or less, more preferably 0.3 mass% or more, 2.5 mass% or less.
- Mn 0.1 mass% or more, 2.5 mass% or less
- Mn content is limited to 0.1 mass% or more and 2.5 mass% or less, but preferably 0.2 mass% or more, 2.5 mass% or less, and more preferably 0.4 mass%. Above, 2.5 ma ss% or less.
- Nb 0.003 mass% or more, 0.10 mass% or less
- N, C, S, and Nb is part or all of C
- C By fixing, it is effective to ensure the workability and non-aging property of ultra-low carbon steel.
- C if the content is less than 0.003 mass%, there is no effect, so this value is limited to the lower limit. do. On the other hand, if it exceeds 0.1 mass% in either case, the workability will deteriorate, so this value is the upper limit.
- the amount of C is reduced to about 0.020 ma ss% or less, the total of Ti and Nb is preferably 0.03111333% or more and 0.10 mass% or less. , More preferably 0.03 mass% or more and 0.08 mass% or less.
- B 0. 0005 mass% or more,., 0. 0080 mass% or less
- B segregates at the grain boundaries and shows a remarkable effect in preventing secondary processing brittleness, but the effect is small when the content is less than 0.0005 mass%, and on the other hand, even if it is contained in excess of 0.0080 mass%. Not only the effect is saturated, but also the yield strength increases and the elongation decreases, which deteriorates the workability. Therefore, its content is limited to 0.0005 mass% or more and 0.0080 mass% or less. However, since the addition of B slightly deteriorates the workability, it is preferably 0.0005 mass% or more and 0.0050 mass% or less, more preferably, except when P containing more than 0.15 mass% is contained. Is greater than or equal to 0.0005 mass% and less than or equal to 0.030 mass%. P: 0.040 mass% or more, 0.18 mass% or less
- P has the effect of strengthening steel and improving workability, especially the average r value, and is contained according to the desired strength.
- the effect becomes remarkable when the content is 0.004 mass% or more, but on the other hand, when the content exceeds 0.18 mass%, the alloying of the fitting is significantly delayed and the solidification segregation during casting causes the effect.
- the material also deteriorates.
- the amount of C is reduced for the purpose of improving the material, the secondary processing brittleness begins to deteriorate when the content is 0.12 mass% or more, and when the content is 0.15 mass% or more, a large amount of B needs to be added.
- the P content is specified as 0.040 mass% or more and 0.18 mass% or less, but preferably 0.040 mass% or more and 0.15 mass% or less, more preferably 0.040 mass% or more and 0. . 12 mass% or less.
- the content of S exceeds 0.015 mass%, a large amount of M n S is deposited and the workability deteriorates, so this is the upper limit.
- it is preferably 0.0010 mass% or less, and more preferably 0.008 mass% or less. It is desirable that the content is low, but if it is less than 0.0005 mass%, it will be significantly manufactured by the current technology. It is not practical because the space rises.
- A1 0.005 mass% or more, 0.10 mass% or less
- A1 is added as needed for deoxidation and precipitation and fixation of N in steel, but if its content is less than 0.005 raass%, inclusions will increase and good workability cannot be obtained. C On the other hand If the content is too high, not only the workability will be deteriorated, but also the surface texture will be deteriorated. Therefore, the A1 content should be limited to 0.005 mass% or more and 0.10 mass% or less. However, from the viewpoint of optimizing the above-mentioned mechanical force, it is preferably 0.005 mass% or more and 0.06 mass% or less, and more preferably 0.01 mass% or more and 0.06 mass% or less.
- N is a harmful component that is one of the main causes of strain aging, and if the content is too high, it is necessary to add a large amount of Ti and A1, so the upper limit is 0.0060 mass%. However, from the viewpoint of further improving workability, it is preferably 0.0040 mass% or less, more preferably 0.00 30 mass% or less. It is desirable that the content is low, but if it is less than 0.0003 mass%, it is not practical because the manufacturing cost increases significantly with the current technology.
- Steelmaking and casting conditions may be performed according to the conventional method.
- the hot rolling finish temperature must be at least 750 ° C to improve workability after cold rolling and annealing. At a temperature lower than this, the residual rolled structure in the hot-rolled plate becomes remarkable, which is disadvantageous for the formation of an aggregate structure which is advantageous for press formability. On the other hand, when the rolling is completed at a temperature exceeding 1000 ° C, the hot-rolled sheet structure becomes coarse, and an aggregate structure advantageous for press formability cannot be obtained. Therefore, the hot rolling finish temperature should be 750 ° C or higher and 1000 ° C or lower.
- the cold rolling rolling reduction ratio is set to 60% or more, so set it to 60% or more. It is preferably advantageous to have a cold spreading reduction rate of 70% or more. On the other hand, if the cold spreading reduction rate is 95% or more, the workability deteriorates, so the upper limit is set to 95%.
- Plating is performed with a continuous hot-dip galvanizing facility.
- the recrystallization annealing temperature after cold rolling may be 700 ° C or higher and 950 ° C or lower, but preferably 800 ° C or higher.
- quench to a temperature range of 380 to 530 ° C. If the quenching stop temperature is less than 380 ° C, non-plating will occur, while if it exceeds 530 ° C, unevenness will occur on the fitting surface, which is preferable. Not. After quenching, it is subsequently dipped in a hot-dip galvanized bath containing 0.12 to 0.145 mass% of A l.
- alloying will proceed too much and the adhesion (baudling resistance) will deteriorate. On the other hand, if it exceeds 0.145 mass%, non-plating will occur. Alloying by heating following plating is carried out so that the Fe content in the squeezing layer is 9 to 12%. That is, alloying is performed by heating for 14 seconds or more and 28 seconds or less in a temperature range of 450 to 550 ° C. If the heating temperature is less than 450 ° C or the heating time is less than 14 seconds, alloying will not be performed sufficiently, and the Fe content will be less than 9%, resulting in deterioration of flaking resistance. On the other hand, if the heating temperature exceeds 550 ° C or the heating time exceeds 28 seconds, alloying will proceed excessively and the padding resistance will deteriorate.
- the bath temperature of the zinc-filled bath shall be in the range of 450 to 490 ° C, and the temperature of the plate that penetrates the bath shall be above the bath temperature and below (bath temperature + 10 ° C). If the bath temperature is less than 450 ° C or the penetration plate temperature is less than the bath temperature, zinc coagulation is promoted and it becomes difficult to adjust the amount of adhesion. On the other hand, if the bath temperature exceeds 490 ° C or the penetrating plate temperature exceeds (bath temperature + 10 ° C), the elution of iron from the steel plate into the bath is promoted, dross is formed, and surface defects are likely to occur.
- the steel sheet obtained by the present invention does not change in the characteristics of the present invention even if the surface is subjected to a special treatment such as applying a lubricant to further improve the press moldability, weldability, or corrosion resistance. .. Further, even if the steel sheet of the present invention (or a steel sheet in which the surface of the steel sheet of the present invention is specially treated) is temper-rolled for the purpose of shape correction or the like, the characteristics of the present invention do not change. The best mode for carrying out the invention
- a steel slab with the composition shown in Table 2 melted in a converter is used as a material for hot rolling, then pickled and cold rolled to a plate pressure of 0.8, and then continuously molten zinc is applied. Tightening was performed with a line, and the tensile properties and fitting characteristics of the obtained steel sheet were investigated.
- the plating bath temperature was in the range of 460 to 480 ° C, and the penetration plate temperature was fitted to the bath temperature.
- the bath temperature was +10), and the conditions for alloying were heating in the temperature range of 480 to 540 ° C for 15 to 28 seconds.
- the tensile characteristics were measured using a JIS No. 5 test piece, and the plating characteristics were tested and evaluated by the same method as in the above experiment.
- the present invention utilizes S i as a reinforcing component in ultra-low carbon steel and identifies the interrelationship between the contents of S i and M n, resulting in excellent plating characteristics and suitable characteristics for press forming.
- a high-strength alloyed hot-dip galvanized steel sheet is obtained, and the steel sheet based on this disclosure can greatly contribute to weight reduction and safety improvement of automobiles.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Coating With Molten Metal (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95907877A EP0694625B9 (en) | 1994-02-15 | 1995-02-13 | High tension alloyed molten zinc-plated steel plate having excellent plating characteristics and method off manufacturing the same |
US08/525,686 US5882803A (en) | 1994-02-15 | 1995-02-13 | High-strength hot dip galvannealed steel sheets having excellent plating properties and method of producing the same |
DE69521459T DE69521459T2 (de) | 1994-02-15 | 1995-02-13 | Hochfeste feuerverzinkte stahlplatte mit hervorragenden plattierungseigenschaften und herstellungsverfahren |
KR1019950704431A KR100308003B1 (ko) | 1994-02-15 | 1995-02-13 | 고강도합금화용융아연도금강판 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6/18364 | 1994-02-15 | ||
JP1836494 | 1994-02-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995021947A1 true WO1995021947A1 (fr) | 1995-08-17 |
Family
ID=11969651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/000196 WO1995021947A1 (fr) | 1994-02-15 | 1995-02-13 | Tole d'acier revetue de zinc allie fondu sous haute tension, a excellentes caracteristiques de zingage, et son procede de fabrication |
Country Status (5)
Country | Link |
---|---|
US (1) | US5882803A (ja) |
EP (1) | EP0694625B9 (ja) |
KR (1) | KR100308003B1 (ja) |
DE (1) | DE69521459T2 (ja) |
WO (1) | WO1995021947A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997031131A1 (fr) * | 1996-02-22 | 1997-08-28 | Sumitomo Metal Industries, Ltd. | Tole d'acier recuit et procede de production |
WO2001052731A1 (en) * | 2000-01-21 | 2001-07-26 | Instrumentarium Corporation | Medical electrode |
JP4886118B2 (ja) | 2001-04-25 | 2012-02-29 | 株式会社神戸製鋼所 | 溶融亜鉛めっき鋼板 |
KR100478091B1 (ko) * | 2002-05-24 | 2005-03-24 | 주식회사 포스코 | 용융아연도금강판의 제조방법 |
DE102009016852A1 (de) * | 2009-04-08 | 2010-10-14 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Herstellung wärmebehandelter Blechformteile aus einem Stahlblechmaterial mit einer Korrosionsschutzbeschichtung und derartiges Blechformteil |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0211745A (ja) * | 1988-06-29 | 1990-01-16 | Kawasaki Steel Corp | スポット溶接性に優れた合金化溶融亜鉛めっき鋼板の製造方法 |
JPH0441658A (ja) * | 1990-06-07 | 1992-02-12 | Nippon Steel Corp | 耐パウダリング性に優れた焼付硬化性高強度合金化溶融亜鉛めっき鋼板およびその製造方法 |
JPH04154937A (ja) * | 1990-10-16 | 1992-05-27 | Nippon Steel Corp | 高強度合金化溶融亜鉛めっき鋼板 |
JPH05339643A (ja) * | 1992-06-08 | 1993-12-21 | Kawasaki Steel Corp | 深絞り性に優れた高強度冷延鋼板及び亜鉛めっき鋼板の製造方法 |
JPH05345953A (ja) * | 1992-06-12 | 1993-12-27 | Kobe Steel Ltd | 加工性にすぐれる極低C系の薄物熱延原板の合金化溶融Znめつき鋼板及びその製造方法 |
Family Cites Families (12)
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JPS60174852A (ja) * | 1984-02-18 | 1985-09-09 | Kawasaki Steel Corp | 深絞り性に優れる複合組織冷延鋼板とその製造方法 |
JPS63100158A (ja) * | 1986-10-15 | 1988-05-02 | Kobe Steel Ltd | 成形性にすぐれる高強度冷延鋼板 |
US5019460A (en) * | 1988-06-29 | 1991-05-28 | Kawasaki Steel Corporation | Galvannealed steel sheet having improved spot-weldability |
US5156690A (en) * | 1989-11-22 | 1992-10-20 | Nippon Steel Corporation | Building low yield ratio hot-dip galvanized cold rolled steel sheet having improved refractory property |
US5049453A (en) * | 1990-02-22 | 1991-09-17 | Nippon Steel Corporation | Galvannealed steel sheet with distinguished anti-powdering and anti-flaking properties and process for producing the same |
JPH03294463A (ja) * | 1990-04-11 | 1991-12-25 | Nippon Steel Corp | 合金化溶融亜鉛めっき鋼板の製造方法 |
CA2101841C (en) * | 1991-12-06 | 2000-02-01 | Makoto Isobe | Method of manufacturing molten zinc plated steel plates having few unplated portions |
JPH05255807A (ja) * | 1992-03-12 | 1993-10-05 | Nippon Steel Corp | 成形性に優れた高強度冷延鋼板と溶融亜鉛メッキ高強度冷延鋼板およびそれらの製造方法 |
WO1993020254A1 (en) * | 1992-03-30 | 1993-10-14 | Kawasaki Steel Corporation | Surface-treated steel sheet reduced in plating defects and production thereof |
US5360493A (en) * | 1992-06-08 | 1994-11-01 | Kawasaki Steel Corporation | High-strength cold-rolled steel sheet excelling in deep drawability and method of producing the same |
JP3266317B2 (ja) * | 1992-07-10 | 2002-03-18 | 川崎製鉄株式会社 | 深絞り性に優れた高張力冷延鋼板及びその製造方法 |
KR0128986B1 (ko) * | 1992-09-14 | 1998-04-16 | 다나까 미노루 | 상온에서 비시효성인 페라이트성 단일상 냉간 강판 및 가고우치성 저항과 벗겨짐에 대한 내성이 우수한 인발성형용 열간침지 아연도금 합금 및 그것의 제조방법 |
-
1995
- 1995-02-13 KR KR1019950704431A patent/KR100308003B1/ko not_active IP Right Cessation
- 1995-02-13 EP EP95907877A patent/EP0694625B9/en not_active Revoked
- 1995-02-13 DE DE69521459T patent/DE69521459T2/de not_active Expired - Fee Related
- 1995-02-13 WO PCT/JP1995/000196 patent/WO1995021947A1/ja not_active Application Discontinuation
- 1995-02-13 US US08/525,686 patent/US5882803A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0211745A (ja) * | 1988-06-29 | 1990-01-16 | Kawasaki Steel Corp | スポット溶接性に優れた合金化溶融亜鉛めっき鋼板の製造方法 |
JPH0441658A (ja) * | 1990-06-07 | 1992-02-12 | Nippon Steel Corp | 耐パウダリング性に優れた焼付硬化性高強度合金化溶融亜鉛めっき鋼板およびその製造方法 |
JPH04154937A (ja) * | 1990-10-16 | 1992-05-27 | Nippon Steel Corp | 高強度合金化溶融亜鉛めっき鋼板 |
JPH05339643A (ja) * | 1992-06-08 | 1993-12-21 | Kawasaki Steel Corp | 深絞り性に優れた高強度冷延鋼板及び亜鉛めっき鋼板の製造方法 |
JPH05345953A (ja) * | 1992-06-12 | 1993-12-27 | Kobe Steel Ltd | 加工性にすぐれる極低C系の薄物熱延原板の合金化溶融Znめつき鋼板及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0694625B1 (en) | 2001-06-27 |
KR100308003B1 (ko) | 2001-11-30 |
DE69521459T2 (de) | 2002-03-28 |
EP0694625A1 (en) | 1996-01-31 |
EP0694625B9 (en) | 2001-12-05 |
DE69521459D1 (de) | 2001-08-02 |
US5882803A (en) | 1999-03-16 |
EP0694625A4 (en) | 1996-06-26 |
KR960702013A (ko) | 1996-03-28 |
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