CN102581007A - Method for producing steel for automotive outer plate with width of 2,000-2,070mm - Google Patents
Method for producing steel for automotive outer plate with width of 2,000-2,070mm Download PDFInfo
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- CN102581007A CN102581007A CN2012100182320A CN201210018232A CN102581007A CN 102581007 A CN102581007 A CN 102581007A CN 2012100182320 A CN2012100182320 A CN 2012100182320A CN 201210018232 A CN201210018232 A CN 201210018232A CN 102581007 A CN102581007 A CN 102581007A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 50
- 239000010959 steel Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 238000000137 annealing Methods 0.000 claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 238000005097 cold rolling Methods 0.000 claims abstract description 6
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000005554 pickling Methods 0.000 claims abstract description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 25
- 239000011701 zinc Substances 0.000 claims description 25
- 229910052725 zinc Inorganic materials 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 11
- 238000002791 soaking Methods 0.000 claims description 10
- 238000005098 hot rolling Methods 0.000 claims description 6
- 241001417490 Sillaginidae Species 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000005246 galvanizing Methods 0.000 abstract description 9
- 238000005482 strain hardening Methods 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 239000000047 product Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention relates to a method for producing steel for an automotive outer plate with a width of 2,000-2,070mm. The method comprises the following steps: performing smelting and continuous casting; heating a plate blank; cooling the plate blank in a laminar flow cooling mode; rolling; naturally cooling to the temperature lower than or equal to 70 DEG C; pickling; performing cold rolling; annealing; galvanizing; and performing finishing. The finished extra-deep drawing hot galvanizing DX56D+Z-C steel plates with a specification of (0.7-1.0)*(2,000-2,070)mm (thickness of the plate*width of the plate) and the steel strips have the following real performances that (perpendicular to the rolling direction) the yield strength is equal to 150-175MPa, the tensile strength is equal to 285-320MPa, the plastic strain ratio r90 is more than or equal to 2.7, the work hardening index n90 is more than or equal to 0.21, the elongation rate A80mm is more than or equal to 42 percent, and the surface quality of the plate meets the quality requirements (EN 10327 standard C-level surface requirements) of the automotive outer plate.
Description
Technical field
The present invention relates to the production method of automobile steel iron material, specifically belong to the method for 2000～2070 mm wide automobile exterior panels of producing with steel.
Background technology
The deep drawability of IF steel is the best in the middle of present automobile steel; Have characteristics such as stable performance, no timeliness, processability are good, surface quality height; Ultra deep-draw level IF steel heat zinc coating plate (EDDQ level; The special-purpose trade mark of trade mark DX56D+Z, SGCD3 or automobile factory), be widely used in making the parts of vehicle exterior cladding element and complicated moulding.The ultra deep-draw hot dip galvanizing automobile exterior panel of 1850-2070mm wide cut is mainly used in the driver's cabin of outer covering pieces such as the gusset, top cover of MPV, commercial vehicle and high-end commercial car.The ultra deep-draw automobile exterior panel of the wide 2000～2070mm of plate because the wide increase of plate; Adopt common hot dip galvanizing production process, band steel constriction (change width is big), the temperature that the band steel band is gone in the zinc pot can make the zinc liquid temperature fluctuation; Cause zinc layer quality bad, can't satisfy user's instructions for use.
At present; In the disclosed document; There is not to find report about the zinc-plated production method of wide cut ultra deep-draw hot dip galvanizing automobile exterior panel product; Mainly be confined in the control of material (composition) and performance about the document of ultra deep-draw with steel, being called " a kind of method of the Ti-IF of control steel shaping surface line defective " disclosed product of document (application number CN201110031863.1) like name is the composition and the technological design of continuous annealing TI-IF product made from steel; Name is called the production that " a kind of high plastic-strain ratio galvanized steel sheet and production method " (patent No. CN200810047008.8) described a kind of high r value galvanized sheet; This patent lays particular emphasis on the composition and realization properties of product, the production technology of the zinc-plated outside plate of undeclared wide cut of steel grade; Document [3] introduced this steel MDZ3 galvanizing IF band steel exploitation (Hu Xiaoqiang. special deep-draw is with exploitation and the application of galvanizing steel band MDZ3. this steel technology .2009 (5) .25-28) be deep-draw level IF galvanizing steel plate; Deep drawability r value, n value are lower, and the purpose of the document is a performance of products; Document [4] discloses a kind of steel plate with good deep drawing quality and manufacturing approach, and (application number: JP19890278655), document is confined to the setting of composition hot rolling technology, does not consider that composition is to the influence of zincincation and the design of zincincation.
Summary of the invention
The problem that the present invention will solve is; Overcome plate in the present automobile steel wide reach 2000～2070 millimeters ultra deep-draw automobile exterior panels because the wide increase of plate; Production is difficult to control; Especially zinc laminar surface difficult quality meets the requirements of deficiency, provides a kind of through zincincation being controlled the production method that has not only guaranteed zinc-plated outer plate surfaces quality but also guaranteed plate property.
Realize the measure of above-mentioned purpose:
A kind of method of producing 2000～2070 mm wide automobile exterior panels with steel, its step:
1) smelts also continuous casting;
2) slab heating temperature is 1220～1280 ℃, and 30～40 fens kinds of soaking adopt controlled rolling and controlled cooling to carry out hot rolling: it adopts compression ratio when roughing be 80% rolling; When finish rolling, the control finishing temperature is at 910 ℃～950 ℃, and to control its thickness be cold rolling required thickness, controls its width and be wider than 0.55～0.7% of final products width;
3) adopt the laminar flow type of cooling to be cooled to 710 ℃～740 ℃;
4) under 710 ℃～740 ℃ temperature conditions, batch;
5) naturally cool to≤70 ℃;
6) carry out pickling;
7) carry out cold rollingly, control its total reduction ratio 80%～83%;
8) anneal: in the soaking zone annealing temperature is 820 ℃～840 ℃; At cooling section, control cooling end temp is at 475 ℃～485 ℃; At whole annealing stage, the fixed value of the control speed of service of steel plate in annealing furnace in 90 meters～100 meters/minute scopes;
9) carry out zinc-plated: the temperature that the control steel plate is gone into the zinc pot is at 470 ℃～475 ℃, the control fixed value of zinc liquid temperature in 463 ℃～466 ℃ scopes, the speed of service of control steel plate in the zinc pot is consistent with the speed of service of steel plate in annealing furnace; Al weight percent content in the control zinc liquid is 0.21%～0.23%, the weight percent content of Fe≤0.01%;
10) carry out polishing, control its extensibility 1.1%～1.2%; For use.
The present invention compared with prior art; Trimmed size is at the ultra deep-draw galvanizing DX56D+Z-C steel plate of 0.7～1.0 * 2000～2070mm (thickness of slab * plate is wide) and the object performance (perpendicular to rolling direction) of steel band: yield strength=150～175MPa; Tensile strength=285～320MPa, plastic strain ratio r
90>=2.7, work hardening index n
90>=0.21, percentage elongation A
80mm>=42%, plate face quality reaches automobile exterior panel quality requirement (EN 10327 standard C level surface requirements).
The specific embodiment
Describe in detail in the face of the present invention down:
Embodiment 1
What present embodiment was tested is that 2000 mm wide automobile exterior panel Ultra-low carbon Ti-IF use steel, and its component and percentage by weight are: C:0.003%, Si:0.020%; Mn:0.05%, P:0.015%, S:0.010%; Ti:0.085%; Als:0.06%, N:0.003%, all the other are iron and unavoidable impurities.Its end product thickness is 0.8mm, and width is 2000 millimeters.
Its production stage:
1) smelts also continuous casting;
2) slab heating temperature is 1250 ℃, and 35 fens kinds of soaking adopt controlled rolling and controlled cooling to carry out hot rolling: it adopts compression ratio when roughing be 80% rolling; When finish rolling, the control finishing temperature is at 910 ℃～915 ℃, and its thickness is the thickness of cold rolling requirement: 4 millimeters, its width is according to being wider than 0.6% of final products width, and the width of its hot rolled plate is 2012 millimeters;
3) adopt the laminar flow type of cooling to be cooled to 710 ℃;
4) under 710 ℃ of temperature conditions, batch;
5) naturally cool to 50 ℃;
6) carry out pickling;
7) carry out cold rollingly, control its total reduction ratio 80%;
8) anneal: in the soaking zone annealing temperature is 820 ℃～825 ℃; At cooling section, control cooling end temp is at 475 ℃～477 ℃; At whole annealing stage, the speed of service of control steel plate in annealing furnace is at 90 meters/minute;
9) carry out zinc-plated: the temperature that the control steel plate is gone into the zinc pot is at 470 ℃～471 ℃, and the control zinc liquid temperature is at 463 ℃, and the control speed of service of steel plate in the zinc pot is identical with the speed of service of steel plate in annealing furnace, is 90 meters/minute; Al weight percent content in the control zinc liquid is 0.21%, the weight percent content 0.0097% of Fe;
10) carry out polishing, control its extensibility 1.1%; For use.
Embodiment 2
What present embodiment was tested is that 2030 mm wide automobile exterior panel Ultra-low carbon Ti-IF use steel, and its component and percentage by weight are: C:0.0025%, Si:0.018%; Mn:0.12%, P:0.011%, S:0.0091%; Ti:0.063%; Als:0.041%, N:0.0025%, all the other are iron and unavoidable impurities.Its end product thickness is 0.9mm, and width is 2030 millimeters.
Its production stage:
1) smelts also continuous casting;
2) slab heating temperature is 1260 ℃, and 32 fens kinds of soaking adopt controlled rolling and controlled cooling to carry out hot rolling: it adopts compression ratio when roughing be 80% rolling; When finish rolling, the control finishing temperature is at 930 ℃～935 ℃, and its thickness is cold rolling required thickness: 4.5 millimeters, its width is according to being wider than 0.55% of final products width, and the width of its hot rolled plate is 2042 millimeters;
3) adopt the laminar flow type of cooling to be cooled to 730 ℃;
4) under 730 ℃ of temperature conditions, batch;
5) naturally cool to 70 ℃;
6) carry out pickling;
7) carry out cold rollingly, control its total reduction ratio 80%;
8) anneal: in the soaking zone annealing temperature is 825 ℃～830 ℃; At cooling section, control cooling end temp is at 478 ℃～481 ℃; At whole annealing stage, the speed of service of control steel plate in annealing furnace is at 95 meters/minute;
9) carry out zinc-plated: the temperature that the control steel plate is gone into the zinc pot is at 472 ℃～473 ℃, and the control zinc liquid temperature is at 465 ℃, and the control speed of service of steel plate in the zinc pot is identical with the speed of service of steel plate in annealing furnace, is 95 meters/minute; Al weight percent content in the control zinc liquid is 0.22%%, the weight percent content 0.01% of Fe;
10) carry out polishing, control its extensibility 1.2%; For use.
Embodiment 3
What present embodiment was tested is that 2070 mm wide automobile exterior panel Ultra-low carbon Ti-IF use steel, and its component and percentage by weight are: C:0.0018%, Si:0.018%; Mn:0.15%, P:0.010%, S:0.0093%; Ti:0.062%; Als:0.06%, N:0.0023%, all the other are iron and unavoidable impurities.Its end product thickness is 0.9mm, and width is 2070 millimeters.
Its production stage:
1) smelts also continuous casting;
2) slab heating temperature is 1280 ℃, and 33 fens kinds of soaking adopt controlled rolling and controlled cooling to carry out hot rolling: it adopts compression ratio when roughing be 80% rolling; When finish rolling, the control finishing temperature is at 935 ℃～940 ℃, and its thickness is cold rolling required thickness: 4.8 millimeters, its width is according to being wider than 0.7% of final products width, and the width of its hot rolled plate is 2081.4 millimeters;
3) adopt the laminar flow type of cooling to be cooled to 740 ℃;
4) under 740 ℃ of temperature conditions, batch;
5) naturally cool to 55 ℃;
6) carry out pickling;
7) carry out cold rollingly, control its total reduction ratio 81%;
8) anneal: in the soaking zone annealing temperature is 835 ℃～840 ℃; At cooling section, control cooling end temp is at 482 ℃～485 ℃; At whole annealing stage, the speed of service of control steel plate in annealing furnace is at 100 meters/minute;
9) carry out zinc-plated: the temperature that the control steel plate is gone into the zinc pot is at 474 ℃～475 ℃, and the control zinc liquid temperature is at 466 ℃, and the control speed of service of steel plate in the zinc pot is identical with the speed of service of steel plate in annealing furnace, is 100 meters/minute; Al weight percent content in the control zinc liquid is 0.23%%, the weight percent content 0.0075% of Fe;
10) carry out polishing, control its extensibility 1.2%; For use.
Through to the detection of above-mentioned Test Example finished product, its yield strength is at 150～175MPa, and tensile strength is at 285～320MPa, plastic strain ratio r
90: 2.7～3.1, work hardening index n
90: 0.21～0.24, percentage elongation A
80mm: 42～48%, plate face quality reaches automobile exterior panel quality requirement (EN 10327 standard C level surface requirements).
Claims (1)
1. method of producing 2000～2070 mm wide automobile exterior panels with steel, its step:
1) smelts also continuous casting;
2) slab heating temperature is 1220～1280 ℃, and 30～40 fens kinds of soaking adopt controlled rolling and controlled cooling to carry out hot rolling: it adopts compression ratio when roughing be 80% rolling; When finish rolling, the control finishing temperature is at 910 ℃～950 ℃, and to control its thickness be cold rolling required thickness, controls its width and be wider than 0.55～0.7% of final products width;
3) adopt the laminar flow type of cooling to be cooled to 710 ℃～740 ℃;
4) under 710 ℃～740 ℃ temperature conditions, batch;
5) naturally cool to≤70 ℃;
6) carry out pickling;
7) carry out cold rollingly, control its total reduction ratio 80%～83%;
8) anneal: in the soaking zone annealing temperature is 820 ℃～840 ℃; At cooling section, control cooling end temp is at 475 ℃～485 ℃; At whole annealing stage, the fixed value of the control speed of service of steel plate in annealing furnace in 90 meters～100 meters/minute scopes;
9) carry out zinc-plated: the temperature that the control steel plate is gone into the zinc pot is at 470 ℃～475 ℃, the control fixed value of zinc liquid temperature in 463 ℃～466 ℃ scopes, the speed of service of control steel plate in the zinc pot is consistent with the speed of service of steel plate in annealing furnace; Al weight percent content in the control zinc liquid is 0.21%～0.23%, the weight percent content of Fe≤0.01%;
10) carry out polishing, control its extensibility 1.1%～1.2%; For use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100182320A CN102581007A (en) | 2012-01-19 | 2012-01-19 | Method for producing steel for automotive outer plate with width of 2,000-2,070mm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100182320A CN102581007A (en) | 2012-01-19 | 2012-01-19 | Method for producing steel for automotive outer plate with width of 2,000-2,070mm |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215534A (en) * | 2013-03-21 | 2013-07-24 | 宝钢集团新疆八一钢铁有限公司 | Production process of high strength hot dip galvanized sheet |
| CN104988446A (en) * | 2015-07-17 | 2015-10-21 | 武汉钢铁(集团)公司 | Galvanizing method for improving surface quality of hot galvanized plate |
| CN110592492A (en) * | 2019-10-17 | 2019-12-20 | 山东钢铁集团日照有限公司 | A production method of ultra-deep-drawn hot-dip galvanized steel for automobile roof |
| CN112695252A (en) * | 2020-12-21 | 2021-04-23 | 本钢板材股份有限公司 | Ultra-deep drawing high-elongation electro-galvanized automobile outer plate and preparation method thereof |
| CN113231485A (en) * | 2021-05-07 | 2021-08-10 | 西安钢研功能材料股份有限公司 | Preparation method of high-expansion alloy large coil weight strip without welding seam |
| CN115647047A (en) * | 2022-09-21 | 2023-01-31 | 武汉钢铁有限公司 | Method for producing alloyed galvanized sheet with sheet width of more than or equal to 1800mm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103215534A (en) * | 2013-03-21 | 2013-07-24 | 宝钢集团新疆八一钢铁有限公司 | Production process of high strength hot dip galvanized sheet |
| CN104988446A (en) * | 2015-07-17 | 2015-10-21 | 武汉钢铁(集团)公司 | Galvanizing method for improving surface quality of hot galvanized plate |
| CN110592492A (en) * | 2019-10-17 | 2019-12-20 | 山东钢铁集团日照有限公司 | A production method of ultra-deep-drawn hot-dip galvanized steel for automobile roof |
| CN112695252A (en) * | 2020-12-21 | 2021-04-23 | 本钢板材股份有限公司 | Ultra-deep drawing high-elongation electro-galvanized automobile outer plate and preparation method thereof |
| CN113231485A (en) * | 2021-05-07 | 2021-08-10 | 西安钢研功能材料股份有限公司 | Preparation method of high-expansion alloy large coil weight strip without welding seam |
| CN113231485B (en) * | 2021-05-07 | 2022-01-28 | 西安钢研功能材料股份有限公司 | Preparation method of high-expansion alloy large coil weight strip without welding seam |
| CN115647047A (en) * | 2022-09-21 | 2023-01-31 | 武汉钢铁有限公司 | Method for producing alloyed galvanized sheet with sheet width of more than or equal to 1800mm |
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Application publication date: 20120718 |