CN103469063A - Method for producing hot galvanized roasted hardened steel plate - Google Patents
Method for producing hot galvanized roasted hardened steel plate Download PDFInfo
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- CN103469063A CN103469063A CN 201310417044 CN201310417044A CN103469063A CN 103469063 A CN103469063 A CN 103469063A CN 201310417044 CN201310417044 CN 201310417044 CN 201310417044 A CN201310417044 A CN 201310417044A CN 103469063 A CN103469063 A CN 103469063A
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Abstract
The invention relates to a method for producing a hot galvanized roasted hardened steel plate. The method is characterized by comprising a steelmaking step, a continuous casting step, a hot rolling step, an acid pickling and cold rolling step, and a galvanizing step. Compared with the prior art, the method provided by the invention is capable of producing the hot galvanized roasted hardened steel plate at high efficiency and low cost. The hot galvanized roasted hardened steel plate produced by the method provided by the invention is capable of meeting the related standard requirements and can be applied to automobile production.
Description
Technical field
The present invention relates to a kind of hot galvanizing bake hardening steel production method.
Background technology
The raising required along with vehicle safety performance in recent years, the intensity rank of auto sheet is improving constantly, and adopt the high intensity levels steel plate to alleviate tare under the prerequisite of not losing vehicle safety performance, thereby can reduce automobile fuel consumption and environmental contamination reduction.Therefore, increasing auto sheet adopts High Strength Steel Plate.Yet, the anti-collision performance that auto sheet is not only had relatively high expectations, and require to have good forming property when stamping.And along with the armor plate strength level, other improves usually, the forming property of steel plate can descend gradually, thereby has limited the application of High Strength Steel Plate on vehicle body.Bake hardening steel but has lower yield strength when punching press, forming property is good, and can improve 30 80MPa by intensity after paint baking, thereby there is anti-depression and anti-collision performance preferably, therefore, bake hardening steel can solve the contradiction between steel formability performance and intensity preferably, good forming property is arranged while reaching punching press and higher intensity is arranged while using.
Alloyed hot galvanizing bake hardening steel through pot galvanize and coating alloying anneal, not only there is good corrosion resisting property, also there is good welding property, coating performance and anti-stone and hit performance, be applicable to very much being applied to the automobile inner and outer plates that oceanic climate area, the poor area of road conditions and cold district are used.Thereby the ratio that alloyed hot-dip galvanized steel sheet is used on vehicle body is improving constantly.At present, Japanese sedan limousine outside plate has all adopted alloyed hot-dip galvanized steel sheet.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of technical scheme of hot galvanizing bake hardening steel production method.
Described a kind of hot galvanizing bake hardening steel production method, is characterized in that comprising steel making working procedure, continuous casting working procedure, hot-rolled process, pickling and cold-rolling operation, zinc-plated operation,
1) smelt, be continuously cast into slab by following composition; The chemical composition mass percent of steel plate is: 0.055%≤C≤0.075%; Si≤O.03%; 0.25%≤Mn≤O.35%; P≤O.015%; S≤0.012%; 0.015%≤AL≤0.045%; 0.015%≤B≤O.035%; O≤0.015%, all the other are Fe; Wherein, carry out decarburization and remove detrimental impurity in convertor steelmaking process, carry out Fruit storage in refining;
2) hot rolling: heating of plate blank, Heating temperature: 1,190 1250 ℃; Hot rolling finishing temperature: 890 930 ℃; Naturally cooling 4-8S, coiling temperature: 650 750 ℃;
3) pickling and cold rolling: cold rolling draft is controlled between 75% 80%;
4) annealing before hot dip process: annealing temperature: 780 870 ℃, soaking time: 20 50s; Galvanizing: the band steel enters zinc pot temperature and is greater than zinc bath temperature, and is less than or equal to 480 ℃; Galvanizing bath temperature: 455 465 ℃; Total aluminium quality percentage composition of hot-dip galvanizing bath is controlled at 0.06 0.07%; Coating alloying annealing after galvanizing: annealing temperature is controlled between 470 530 ℃; Forging laminated aurification annealing time is controlled between 12 25s.
Described a kind of hot galvanizing bake hardening steel production method, is characterized in that in described step 4), coating alloying annealing is rear smooth, and smooth elongation control is between 1.0 1.5%.
Described a kind of hot galvanizing bake hardening steel production method, is characterized in that in described step 4), coating alloying annealing is rear smooth, more than diameter 420mm is selected in smooth working roll roller footpath.
Described a kind of hot galvanizing bake hardening steel production method, is characterized in that in described step 4), the coating weight single face is controlled at 30 60g/m
2between.
Described a kind of hot galvanizing bake hardening steel production method, is characterized in that annealing before hot dip process in described step 4): annealing temperature: 800 850 ℃.
Described a kind of hot galvanizing bake hardening steel production method, is characterized in that described step 2) in coiling temperature be controlled between 690 ℃ 730 ℃.
Described a kind of hot galvanizing bake hardening steel production method, is characterized in that between described continuous casting working procedure and hot-rolled process also having the soaking operation, and soaking temperature is 1400-1450 ℃.
Compared with prior art: can produce efficiently, cheaply hot-galvanizing-baking hardened steel.The hot-galvanizing-baking hardened steel performance that the present invention produces meets the relevant criterion requirement, can be applicable to automobile production.
Embodiment
Hot galvanizing bake hardening steel production method of the present invention, comprise steel making working procedure, continuous casting working procedure, hot-rolled process, pickling and cold-rolling operation, zinc-plated operation,
1) smelt, be continuously cast into slab by following composition; The chemical composition mass percent of steel plate is: 0.055%≤C≤0.075%; Si≤O.03%; 0.25%≤Mn≤O.35%; P≤O.015%; S≤0.012%; 0.015%≤AL≤0.045%; 0.015%≤B≤O.035%; O≤0.015%, all the other are Fe; Wherein, carry out decarburization and remove detrimental impurity in convertor steelmaking process, carry out Fruit storage in refining;
2) hot rolling: heating of plate blank, Heating temperature: 1,190 1250 ℃; Hot rolling finishing temperature: 890 930 ℃; Naturally cooling 4-8S, coiling temperature: 650 750 ℃;
3) pickling and cold rolling: cold rolling draft is controlled between 75% 80%;
4) annealing before hot dip process: annealing temperature: 780 870 ℃, soaking time: 20 50s; Galvanizing: the band steel enters zinc pot temperature and is greater than zinc bath temperature, and is less than or equal to 480 ℃; Galvanizing bath temperature: 455 465 ℃; Total aluminium quality percentage composition of hot-dip galvanizing bath is controlled at 0.06 0.07%; Coating alloying annealing after galvanizing: annealing temperature is controlled between 470 530 ℃; Forging laminated aurification annealing time is controlled between 12 25s.
Step 2) in, coiling temperature is controlled between 690 ℃ 730 ℃.
Smooth after coating alloying annealing in step 4), smooth elongation control is between 1.0 1.5%.
Smooth after coating alloying annealing in step 4), more than diameter 420mm is selected in smooth working roll roller footpath.
In step 4), the coating weight single face is controlled at 30 60g/m
2between.
Annealing before hot dip process in step 4): annealing temperature: 800 850 ℃.
The present invention also has the soaking operation between continuous casting working procedure and hot-rolled process, and soaking temperature is 1400-1450 ℃.
Compared with prior art: can produce efficiently, cheaply hot-galvanizing-baking hardened steel.The hot-galvanizing-baking hardened steel performance that the present invention produces meets the relevant criterion requirement, can be applicable to automobile production.
Claims (7)
1. a hot galvanizing bake hardening steel production method, is characterized in that comprising steel making working procedure, continuous casting working procedure, hot-rolled process, pickling and cold-rolling operation, zinc-plated operation,
1) smelt, be continuously cast into slab by following composition; The chemical composition mass percent of steel plate is: 0.055%≤C≤0.075%; Si≤O.03%; 0.25%≤Mn≤O.35%; P≤O.015%; S≤0.012%; 0.015%≤AL≤0.045%; 0.015%≤B≤O.035%; O≤0.015%, all the other are Fe; Wherein, carry out decarburization and remove detrimental impurity in convertor steelmaking process, carry out Fruit storage in refining;
2) hot rolling: heating of plate blank, Heating temperature: 1,190 1250 ℃; Hot rolling finishing temperature: 890 930 ℃; Naturally cooling 4-8S, coiling temperature: 650 750 ℃;
3) pickling and cold rolling: cold rolling draft is controlled between 75% 80%;
4) annealing before hot dip process: annealing temperature: 780 870 ℃, soaking time: 20 50s; Galvanizing: the band steel enters zinc pot temperature and is greater than zinc bath temperature, and is less than or equal to 480 ℃; Galvanizing bath temperature: 455 465 ℃; Total aluminium quality percentage composition of hot-dip galvanizing bath is controlled at 0.06 0.07%; Coating alloying annealing after galvanizing: annealing temperature is controlled between 470 530 ℃; Forging laminated aurification annealing time is controlled between 12 25s.
2. a kind of hot galvanizing bake hardening steel production method according to claim 1, is characterized in that in described step 4), coating alloying annealing is rear smooth, and smooth elongation control is between 1.0 1.5%.
3. a kind of hot galvanizing bake hardening steel production method according to claim 1, is characterized in that in described step 4), coating alloying annealing is rear smooth, more than diameter 420mm is selected in smooth working roll roller footpath.
4. a kind of hot galvanizing bake hardening steel production method according to claim 1, is characterized in that in described step 4), the coating weight single face is controlled at 30 60g/m
2between.
5. a kind of hot galvanizing bake hardening steel production method according to claim 1, is characterized in that annealing before hot dip process in described step 4): annealing temperature: 800 850 ℃.
6. a kind of hot galvanizing bake hardening steel production method according to claim 1, is characterized in that described step 2) in coiling temperature be controlled between 690 ℃ 730 ℃.
7. a kind of hot galvanizing bake hardening steel production method according to claim 1, is characterized in that between described continuous casting working procedure and hot-rolled process also having the soaking operation, and soaking temperature is 1400-1450 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310417044 CN103469063A (en) | 2013-09-13 | 2013-09-13 | Method for producing hot galvanized roasted hardened steel plate |
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| CN 201310417044 CN103469063A (en) | 2013-09-13 | 2013-09-13 | Method for producing hot galvanized roasted hardened steel plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556096A (en) * | 2013-11-12 | 2014-02-05 | 山东众冠钢板有限公司 | Production process for hard hot galvanized plate |
| CN106636903A (en) * | 2016-12-26 | 2017-05-10 | 安徽宝恒新材料科技有限公司 | High-temperature-resistant steel plate |
| CN107460474A (en) * | 2017-06-23 | 2017-12-12 | 安庆市枞江汽车部件制造有限公司 | A kind of production method of High-quality automobile safety belt wind spring |
-
2013
- 2013-09-13 CN CN 201310417044 patent/CN103469063A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556096A (en) * | 2013-11-12 | 2014-02-05 | 山东众冠钢板有限公司 | Production process for hard hot galvanized plate |
| CN103556096B (en) * | 2013-11-12 | 2016-01-20 | 山东众冠钢板有限公司 | A kind of producing and manufacturing technique of hard heat zinc coating plate |
| CN106636903A (en) * | 2016-12-26 | 2017-05-10 | 安徽宝恒新材料科技有限公司 | High-temperature-resistant steel plate |
| CN107460474A (en) * | 2017-06-23 | 2017-12-12 | 安庆市枞江汽车部件制造有限公司 | A kind of production method of High-quality automobile safety belt wind spring |
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Application publication date: 20131225 |