CN109023054A - Hot-dip galvanizing sheet steel and its manufacturing method - Google Patents
Hot-dip galvanizing sheet steel and its manufacturing method Download PDFInfo
- Publication number
- CN109023054A CN109023054A CN201810936061.7A CN201810936061A CN109023054A CN 109023054 A CN109023054 A CN 109023054A CN 201810936061 A CN201810936061 A CN 201810936061A CN 109023054 A CN109023054 A CN 109023054A
- Authority
- CN
- China
- Prior art keywords
- hot
- dip galvanizing
- sheet steel
- galvanizing sheet
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/14—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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention belongs to steel plate manufacturing technology fields, and in particular to a kind of hot-dip galvanizing sheet steel and its manufacturing method.Technical problem to be solved by the invention is to provide a kind of hot-dip galvanizing sheet steels, its chemical component are as follows: by weight percentage, C:0.001~0.006%, Si:0.01~0.06%, Mn:0.08~0.25%, P:0.010~0.040%, S :≤0.025%, Als:0.010~0.060%, Ti:0.040~0.13%, surplus are Fe and inevitable impurity.Preparation method are as follows: molten iron is through smelting-hot rolling-acid rolls-anneals-hot galvanizing.120~160MPa of the hot-dip galvanizing sheet steel yield strength, 280~300MPa of tensile strength, elongation percentage >=45.0%, n90 >=0.23, r90 >=2.6, mechanical property and processability are excellent, can satisfy requirement.
Description
Technical field
The invention belongs to Plate Production technical fields, and in particular to a kind of hot-dip galvanizing sheet steel and its manufacturing method.
Background technique
Hot-dip galvanizing sheet steel is widely used in auto parts, not only requires excellent stamping formabilily and appearance
Quality, while it is also desirable to have certain dent resistance energy, to reduce the noise for process of running at high speed.With the hair of automobile industry
Exhibition, the high intensity required in vehicle body and high mouldability cold-rolled steel sheet, the representativeness of continuous annealing production molding function admirable
The prior art have following two patent documents:
CN101036968A discloses a kind of production method of deep drawing skin-passed hot-dip galvanizing sheet steel, the invention component and weight hundred
Divide ratio are as follows: C:0.003~0.006%, Ti:0.02~0.04%, 750~780 DEG C of hot-rolling coiling temperature, cold rolled annealed temperature
780~880 DEG C.Invention finished product yield strength 180MPa or so, tensile strength 310MPa or so, elongation 42.0% or so,0.21 or so,1.9 or so.The document is only added to C and Ti.
CN102839322A discloses a kind of automobile hot-dip galvanizing sheet steel and its production method, the invention component and weight hundred
Point than be C:0.001~0.003%, Si :≤0.03%, Mn:0.05~0.15%, P :≤0.02%, S:0.008~
0.015%, Als:0.02~0.07%, Ti:0.05~0.09%, B:0.0002~0.01%, remaining is by Fe.The invention finished product
Yield strength 160MPa or so, tensile strength 2870MPa or so, elongation 44.0% or so, r90 value 2.4 or so, n90 value
0.24.The prior art needs to add B, and Mn content range is relatively narrow, and process implementing difficulty is big.
Summary of the invention
That technical problem to be solved by the invention is to provide a kind of forming properties is good, rebound is small, properties of product stability is good,
Meet the components that can be used for manufacturing complex deformation in household electrical appliances and door industry, such as the hot-dip galvanizing sheet steel of motorcycle tank requirement
And preparation method thereof.
First technical problem to be solved by this invention is to provide a kind of hot-dip galvanizing sheet steel.The hot-dip galvanizing sheet steel is by weight
Percentages, chemical component are as follows: C:0.001~0.006%, Si:0.01~0.06%, Mn:0.08~0.25%, P:0.010
~0.040%, S :≤0.025%, Als:0.010~0.060%, Ti:0.040~0.13%, surplus is for Fe and unavoidably
Impurity.
Preferably, above-mentioned galvanized steel plain sheet, 120~160MPa of yield strength, 280~300MPa of tensile strength, elongation percentage
>=45.0%, n90 >=0.23, r90 >=2.6.
Second technical problem to be solved by this invention is to provide the manufacturing method of hot-dip galvanizing sheet steel.The manufacturing method
The following steps are included: blast-melted smelted, be casting continuously to form slab, slab is heated, dephosphorization, roughing, finish rolling, cooling, batches
Hot rolled coil, hot rolled coil obtain Thin Strip Steel through pickling, cold rolling, and Thin Strip Steel is annealed, hot galvanizing gets product hot-dip galvanizing sheet steel.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, the heating temperature is 1200~1250 DEG C.Heating time
180~220min.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, the start rolling temperature of the finish rolling is 1100~1250 DEG C, finish to gauge
Temperature is 890~970 DEG C.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, the coiling temperature is 690~770 DEG C.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, the cold rolling reduction ratio is 60~85%.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, the annealing temperature is 800~880 DEG C.Annealing time is
120~240s.
Further, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, the annealing operation is divided into heating, soaking, slow cooling three
A stage, heating temperature are 690~760 DEG C, and soaking temperature is 800~880 DEG C, and slow cooling temperature is 550~600 DEG C.Wherein, add
The purpose of hot stage is that slab is enable to have a buffering course to enter soaking, and the soaking stage is practical annealing stage, slow cooling stage
Purpose is that slab is made to have a buffering course to carry out hot galvanizing, to guarantee slab quality.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, hot dip is cooled to 40~80 DEG C/s after the annealing
Zinc temperature.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, the temperature of the hot galvanizing is 440~460 DEG C.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, the time of the hot galvanizing is 7~30s.
Wherein, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, 280 are cooled to 10~50 DEG C/s after the hot galvanizing
It~300 DEG C, is then cooled to room temperature with 5~10 DEG C/s.
Preferably, in the manufacturing method of above-mentioned hot-dip galvanizing sheet steel, when the hot galvanizing in furnace protective atmosphere dew-point temperature be-
25~-60 DEG C.
The present invention provides a kind of hot-dip galvanizing sheet steels, are designed by the ingredient to steel plate, the interstitial atoms such as strict control C, N
To guarantee that its steel is pure, while the solution strengthening elements such as suitable Mn, P are added, in conjunction with Ti alloying, in conjunction with distinctive rolling
And continuous annealing hot dip galvanizing process, realize hot-dip galvanizing sheet steel performance stability contorting.Hot-dip galvanizing sheet steel surface quality of the present invention is excellent
It is good, forming property is excellent, intensity with higher, by EN10130 detect, 120~160MPa of yield strength, tensile strength 280
~300MPa, elongation percentage >=45.0%, n90 >=0.23, r90 >=2.6, meet can be used for manufacturing complex deformation in household electrical appliances and door industry
Components, such as the hot-dip galvanizing sheet steel of motorcycle tank requirement and preparation method thereof.
Specific embodiment
The present invention provides a kind of hot-dip galvanizing sheet steels, by weight percentage, chemical component are as follows: and C:0.001~
0.006%, Si:0.01~0.06%, Mn:0.08~0.25%, P:0.010~0.040%, S :≤0.025%, Als:
0.010~0.060%, Ti:0.040~0.13%, surplus are Fe and inevitable impurity.
The main comprehensive performance for considering purity of steel and product of the control of carbon content, the present invention claims clean steels, it is desirable that
Carbon content is lower than 0.01%, and when steel-making must be vacuum-treated.The addition of silicon is to improve intensity, but excessively high silicon can be to warm
Zincincation is unfavorable.Nitrogen exists as relict element, does not add specially, more lower better.Mn mainly improves intensity and and sulphur
It is combined into MnS, the fire check caused by preventing because of FeS, Mn too high levels will affect the welding performance of steel.P mainly improves strong
Degree, by≤0.040% control.S exists as relict element, it is contemplated that the effect of economy and the Ca processing of steel making working procedure is pressed
According to≤0.025% control.Aluminium is added primarily as deoxidant element, to realize complete deoxidation, but excessively high aluminium will affect steel
Welding performance and coating adhesion and uneconomical, but content is too low, increases production control difficulty, therefore, Al content choosing
Being selected as 0.010%~0.060% is advisable.Adding Ti is to guarantee pure ferritic structure, Ti to remove clearance C, N atom
Too low, interstitial atom is removed not exclusively, and Ti is excessively high, and increased costs, intensity is higher, and Ti is advisable with 0.040~0.13%.
The present invention also provides the manufacturing methods of above-mentioned hot-dip galvanizing sheet steel, comprising the following steps: blast-melted to be smelted, even
Slab is cast, slab is heated, dephosphorization, roughing, finish rolling, cooling, batches to obtain hot rolled coil, and hot rolled coil obtains strip through pickling, cold rolling
Steel, Thin Strip Steel is annealed, hot galvanizing gets product hot-dip galvanizing sheet steel.
The present invention provides a kind of hot-dip galvanizing sheet steels, are designed by the ingredient to steel plate, the interstitial atoms such as strict control C, N
To guarantee that its steel is pure, while the solution strengthening elements such as suitable Mn, P are added, in conjunction with distinctive rolling and continuous annealing heat
Zincincation realizes hot-dip galvanizing sheet steel performance stability contorting.Gained hot-dip galvanizing sheet steel of the invention is detected by EN10130, surrender
120~160MPa of intensity, 280~300MPa of tensile strength, elongation percentage >=45.0%, n90 >=0.23, r90 >=2.6.
Embodiment 1-2
Hot-dip galvanizing sheet steel ingredient of the present invention and preparation process are specific as follows:
(1) by smelting, continuous casting working procedure, the plate slab of chemical component as shown in table 1 below is prepared:
1 hot-dip galvanizing sheet steel chemical component (wt.%) of table
| Number | C | Si | Mn | P | S | Als | Ti |
| Embodiment 1 | 0.001 | 0.01 | 0.11 | 0.014 | 0.005 | 0.026 | 0.068 |
| Embodiment 2 | 0.003 | 0.05 | 0.14 | 0.017 | 0.008 | 0.052 | 0.090 |
(2) heating, roughing, finish rolling, cooling, the hot-rolled process parameter such as to batch as shown in table 2 below:
2 hot rolling main technologic parameters of table
(3) by hot rolled coil pickling, be cold rolled to Thin Strip Steel, wherein embodiment 1,2 cold rolling reduction ratios are respectively 82.9% and
78.2%；
(4) annealing, hot galvanizing process parameter are as shown in table 3 below:
The annealing of table 3, hot galvanizing main technologic parameters
(5) hot-dip galvanizing sheet steel prepared through above-mentioned operation, mechanical property are as shown in table 4 below:
4 hot-dip galvanizing sheet steel mechanical property of table
From the result of Examples 1 and 2: hot-dip galvanizing sheet steel prepared by the present invention has good mechanical property, bends
120~160MPa of intensity, 280~300MPa of tensile strength, elongation percentage >=45.0%, n90 >=0.23, r90 >=2.6 are taken, it can
Meet requirement.The present invention provides a kind of completely new hot-dip galvanizing sheet steels, have excellent performance, low in cost, have apparent
Economic benefit.
Claims (10)
1. hot-dip galvanizing sheet steel, it is characterised in that: by weight percentage, chemical component are as follows: C:0.001~0.006%, Si:
0.01~0.06%, Mn:0.08~0.25%, P:0.010~0.040%, S :≤0.025%, Als:0.010~0.060%,
Ti:0.040~0.13%, surplus are Fe and inevitable impurity.
2. hot-dip galvanizing sheet steel according to claim 1, it is characterised in that: 120~160MPa of yield strength, tensile strength
280~300MPa, elongation percentage >=45.0%, n90 >=0.23, r90 >=2.6.
3. the manufacturing method of hot-dip galvanizing sheet steel of any of claims 1 or 2, it is characterised in that: the following steps are included: blast-melted
It smelted, be casting continuously to form slab, slab is heated, dephosphorization, roughing, finish rolling, cooling, batches to obtain hot rolled coil, and hot rolled coil is through pickling, cold
Thin Strip Steel is rolled to obtain, Thin Strip Steel is annealed, hot galvanizing gets product hot-dip galvanizing sheet steel.
4. the manufacturing method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that: the heating temperature be 1200~
1250℃。
5. the manufacturing method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that: the start rolling temperature of the finish rolling is
1100~1250 DEG C, finishing temperature is 890~970 DEG C.
6. the manufacturing method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that: the coiling temperature be 690~
770℃。
7. the manufacturing method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that: the cold rolling reduction ratio be 60~
85%.
8. the manufacturing method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that: the annealing temperature be 800~
880 DEG C, annealing time is 120~240s.
9. the manufacturing method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that: the hot galvanizing temperature is 440
~460 DEG C, the hot galvanizing time is 7~30s.
10. the manufacturing method of hot-dip galvanizing sheet steel according to claim 3, it is characterised in that: with 40 after the annealing
~80 DEG C/s is cooled to hot galvanizing temperature；280~300 DEG C are cooled to 10~50 DEG C/s after the hot galvanizing, then with 5
~10 DEG C/s is cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936061.7A CN109023054A (en) | 2018-08-16 | 2018-08-16 | Hot-dip galvanizing sheet steel and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936061.7A CN109023054A (en) | 2018-08-16 | 2018-08-16 | Hot-dip galvanizing sheet steel and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109023054A true CN109023054A (en) | 2018-12-18 |
Family
ID=64631691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810936061.7A Pending CN109023054A (en) | 2018-08-16 | 2018-08-16 | Hot-dip galvanizing sheet steel and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109023054A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115652221A (en) * | 2022-11-08 | 2023-01-31 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of hot-dip galvanized steel plate for household appliances |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101151390A (en) * | 2005-03-31 | 2008-03-26 | 杰富意钢铁株式会社 | Alloyed hot-dip galvanized steel sheet and method for producing same |
| CN102094149A (en) * | 2011-03-08 | 2011-06-15 | 攀钢集团钢铁钒钛股份有限公司 | Niobium-containing high-strength hot-galvanized steel plate and production method thereof |
| CN104093873A (en) * | 2012-01-31 | 2014-10-08 | 杰富意钢铁株式会社 | Hot-dip galvanized steel sheet and production method therefor |
| CN104532123A (en) * | 2015-01-06 | 2015-04-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dip galvanized steel sheet and production method thereof |
| CN105648330A (en) * | 2016-04-01 | 2016-06-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dip galvanized steel plate and production method thereof |
| CN107739981A (en) * | 2017-10-23 | 2018-02-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Baking hardening hot-dip galvanizing sheet steel and preparation method thereof |
-
2018
- 2018-08-16 CN CN201810936061.7A patent/CN109023054A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101151390A (en) * | 2005-03-31 | 2008-03-26 | 杰富意钢铁株式会社 | Alloyed hot-dip galvanized steel sheet and method for producing same |
| CN102094149A (en) * | 2011-03-08 | 2011-06-15 | 攀钢集团钢铁钒钛股份有限公司 | Niobium-containing high-strength hot-galvanized steel plate and production method thereof |
| CN104093873A (en) * | 2012-01-31 | 2014-10-08 | 杰富意钢铁株式会社 | Hot-dip galvanized steel sheet and production method therefor |
| CN104532123A (en) * | 2015-01-06 | 2015-04-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dip galvanized steel sheet and production method thereof |
| CN105648330A (en) * | 2016-04-01 | 2016-06-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-dip galvanized steel plate and production method thereof |
| CN107739981A (en) * | 2017-10-23 | 2018-02-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Baking hardening hot-dip galvanizing sheet steel and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115652221A (en) * | 2022-11-08 | 2023-01-31 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of hot-dip galvanized steel plate for household appliances |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5532188B2 (en) | Manufacturing method of high-strength steel sheet with excellent workability | |
| CN110959049B (en) | Flat steel product with good aging resistance and method for the production thereof | |
| CN108018484B (en) | Cold-rolled high-strength steel having tensile strength of 1500MPa or more and excellent formability, and method for producing same | |
| KR101402365B1 (en) | Cold-rolled steel sheet having excellent slow-aging property and high curability in baking, and method for producing same | |
| CN107761006B (en) | Strong dual phase steel of low-carbon hot galvanizing superelevation and preparation method thereof | |
| CN104593674A (en) | Hot-dip galvanized ultra-low carbon bake-hardening steel and production method thereof | |
| CN111996467A (en) | 980 MPa-grade galvanized high-strength steel and preparation method thereof | |
| CN107739981A (en) | Baking hardening hot-dip galvanizing sheet steel and preparation method thereof | |
| CN107779743A (en) | Micro- carbon hot rolling acid-cleaning steel plate and its manufacture method with good deep drawability | |
| CN108796376A (en) | Hot-dip galvanizing sheet steel and preparation method thereof | |
| CN103602884A (en) | Ultralow-carbon aluminum-killed steel plate and production method thereof | |
| CN104611535A (en) | Cold-rolled steel sheet and preparation method thereof | |
| CN111979488A (en) | 780 MPa-grade alloying hot-dip galvanized DH steel and preparation method thereof | |
| CN108677097A (en) | Hot-dip galvanizing sheet steel and its manufacturing method | |
| CN105088068A (en) | Coated steel used for 500 MPa grade automobile girder and ultrafast-cooling production method of coated steel | |
| JP2024500521A (en) | Hot-forming steel materials, hot-forming parts, and methods of manufacturing them | |
| JP5764908B2 (en) | Warm press forming method | |
| CN115461482A (en) | Steel sheet, component and method for producing same | |
| CN108774715A (en) | Hot-dip galvanizing sheet steel and its manufacturing method | |
| CN108486487A (en) | Hot-dip galvanizing sheet steel and its manufacturing method | |
| CN108866437B (en) | 980 MPa-level light fine-grained transformation induced plasticity steel and preparation process thereof | |
| CN109023054A (en) | Hot-dip galvanizing sheet steel and its manufacturing method | |
| CN115537669A (en) | Production method of continuous annealing low-alloy high-strength cold-rolled steel plate | |
| CN108486486A (en) | Hot-dip galvanizing sheet steel and preparation method thereof | |
| CN108796379A (en) | Hot-dip galvanizing sheet steel and its manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |
|
| RJ01 | Rejection of invention patent application after publication |