Continuous annealing process of cold rolled high strength low alloy HC420LA

doi:10.13251/j.issn.0254-6051.2020.08.032

Abstract

Abstract: Continuous annealing process of cold rolled high strength low alloy (HSLA) HC420LA steel was studied according to the production requirements. The composition of HC420LA steel product adopted Nb and Ti microalloying composition system. The hot rolled and cold rolled continuous annealing process were selected as the production process. The recrystallization temperature of HC420LA steel product was determined by laboratory recrystallization temperature test. The continuous annealing process was studied in the industrial trial production stage. It is concluded that the recrystallization temperature of the cold-rolled HSLA HC420LA steel is 700 ℃ and the optimum heating soaking temperature in industrial production is 760 ℃.

Key words: cold rolled, continuous annealing, high strength low alloy, automotive steel

CLC Number:

TG142

Yang Yuanyuan, Dong Lili, Liang Shiyin. Continuous annealing process of cold rolled high strength low alloy HC420LA[J]. Heat Treatment of Metals, 2020, 45(8): 166-169.

References

[1]董苑华, 陆长春, 樊雷. 低合金结构用冷轧钢带L280VK的退火工艺及优化[J]. 柳钢科技, 2015, 4(6): 35-38.
Dong Yuanhua, Lu Changchun, Fan Lei. Annealing process and optimization of the L280VK low-alloy structural cold-rolled strip[J]. Science and Technology of Liuzhou Steel, 2015, 4(6): 35-38.
[2]佟铁印. 本钢汽车用冷轧低合金高强钢CR420LA的研制与开发[J]. 本钢技术, 2013(4): 26-29.
Tong Tieyin. Research and development of the cold rolling high-strength low alloy steel CR420LA for automobile of BX steel[J]. Bengang Technology, 2013(4): 26-29.
[3]王娜, 崔勇, 刘晓峰. 冷轧工艺对低合金高强钢CR340LA力学性能的影响研究[J]. 钢铁研究学报, 2012(S1): 47-51.
Wang Na, Cui Yong, Liu Xiaofeng. Effect of cold rolling process on CR340LA mechanics property[J]. Journal of Iron and Steel Research, 2012(S1): 47-51.
[4]韩风. 汽车用高强度钢在退火过程中的再结晶行为及组织分析[J]. 铸造技术, 2014, 35(11): 2603-2606.
Han Feng. Analysis on microstructure and recrystallization behavior of high strength steel during annealing[J]. Foundry Technology, 2014, 35(11): 2603-2606.
[5]徐清亮, 林大为, 王淼, 等. 冷轧高强IF钢再结晶温度的测定[J]. 金属热处理, 2007, 32(10): 14-17.
Xu Qingliang, Lin Dawei, Wang Miao, et al. Measurement of recrystallization temperature of cold rolled high strength IF steel[J]. Heat Treatment of Metals, 2007, 32(10): 14-17.
[6]王敏莉. Nb-Ti高强IF钢板最优再结晶退火温度确定[J]. 钢铁钒钛, 2011, 32(2): 50-54.
Wang Minli. Determination of optimal recrystallization annealing temperature of Nb-Ti microalloying high strength IF steel[J]. Iron Steel Vanadium Titanium, 2011, 32(2): 50-54.
[7]吴浩, 柴立涛, 许柳. 退火温度对冷轧低碳钢再结晶行为的影响[J]. 金属热处理, 2020, 45(4): 181-182.
Wu Hao, Chai Litao, Xu Liu. Effect of annealing temperature on recrystallization behavior of cold rolled low carbon steel[J]. Heat Treatment of Metals, 2020, 45(4): 181-182.
[8]尹翠兰. 汽车用冷轧低合金高强钢HC340LA的开发生产[J]. 山东冶金, 2011, 38(5): 1-5.
Yin Cuilan. Development and production of cold rolled low alloy high strength steel HC340LA for automobile[J]. Shandong Metallurgy, 2011, 38(5): 1-5.
[9]岳有成, 杨钢, 何惠刚, 等. 均匀化退火对超薄双零铝箔坯料组织与性能的影响[J]. 金属热处理, 2013, 38(9): 41-44.
Yue Youcheng, Yang Gang, He Huigang, et al. Effects of homogenizing annealing on microstructure and properties of ultra-thin double zero aluminum foil blank[J]. Heat Treatment of Metals, 2013, 38(9): 41-44.

[1]	Yu Bo, Zhang Yi, Wang Zhanye, Chai Litao. Effect of continuous annealing process on microstructure and properties of 4.5%Cr cold-rolled weathering steel [J]. Heat Treatment of Metals, 2022, 47(2): 137-140.
[2]	Ding Xuan, Gan Yurong, Zhang Chunju, Wang Liqiang, Yang Mingqiu, Li Hui. Effect of intermediate annealing on microstructure and properties of 6016 aluminum alloy [J]. Heat Treatment of Metals, 2021, 46(8): 174-179.
[3]	Yang Peng, Zhang Pengyan, Ji Jiuzhang. Effect of intercritical quenching and tempering on microstructure and mechancial properties of 600 MPa HSLA steel [J]. Heat Treatment of Metals, 2021, 46(6): 59-64.
[4]	Wang Zhao, Liu Jingbao, Du Mingshan, Sun Xu, Yang Lina, Li Mengxing, Yang Mingwei. Effect of cold rolling reduction ratio on microstructure and properties of 1180 MPa grade complex phase steel [J]. Heat Treatment of Metals, 2021, 46(6): 79-81.
[5]	Chen Zhuo, Wang Chengsi, Jin Bin, Liu Jingbao, Hao Lei, Kuang Shuang, Wang Jinrong. Multiple regulation on mechanical properties of 980 MPa cold-rolled multi-phase steel [J]. Heat Treatment of Metals, 2021, 46(4): 157-160.
[6]	Li Zhiming, Li Chunming, Qin Fenghua, Hu Yinping. Heating process analysis and system design of continuous annealing furnace for cold-rolled stainless steel [J]. Heat Treatment of Metals, 2021, 46(3): 191-195.
[7]	Yang Peiyuan, Huo Qinghui, Chen Zhuo, Zhou Wei, Wang Hongbin. Effect of dew point on surface oxidation behavior of DP590 dual phase steel [J]. Heat Treatment of Metals, 2021, 46(11): 97-102.
[8]	Wang Keqiang, Liu Rendong, Guo Jinyu, Fu Wei, Huang Qiuju, Sun Rongsheng. Development of cold-rolled 800 MPa grade high strength low alloy steel for automobile [J]. Heat Treatment of Metals, 2021, 46(1): 120-124.
[9]	Chen Zhuo, Jin Bin, Wang Chengsi, Liu Jingbao, Kuang Shuang, Liu Liping, Wang Zhao, Li Mengxing, Yang Mingwei, Wang Jinrong. Optimization of heat treatment process of 980 MPa cold-rolling dual phase steel [J]. Heat Treatment of Metals, 2020, 45(7): 86-89.
[10]	Zhao Haiqiang, Chen Hongye. Formation mechanism and preventive measures of pitting defects on surface of cold rolled continuous annealing strip steel [J]. Heat Treatment of Metals, 2020, 45(6): 236-238.
[11]	Wu Hao, Chai Litao, Xu Liu. Effect of annealing temperature on recrystallization behavior of cold rolled low carbon steel [J]. Heat Treatment of Metals, 2020, 45(4): 180-182.
[12]	Liu Jingbao, Zhang Hongbo, Geng Zhiyu, Wei Huanjun. Microstructure and properties of continuous annealed DP980 high strength steel [J]. HTM, 2020, 45(2): 42-45.
[13]	Ren Zhiheng, Ren Huiping, Jin Zili, Li Wei. Effect of continuous annealing on microstructure and properties of 440 MPa grade high strength IF steel containing lanthanum [J]. HTM, 2020, 45(2): 76-80.
[14]	Zhou Bowen, Jiang Cailing, Fan Lei, Zhou Hua, Gao Yuan, Li Yu'nan, Ye Jiang. Effect of continuous annealing slow cooling outlet temperature on yield strength of SPCC cold rolled sheet [J]. HTM, 2020, 45(2): 129-133.
[15]	Wu Jing, Dong Xinxin, Liu Liping. Effect of annealing process on microstructure and mechanical properties of cold rolled TRIP980 steel plate [J]. Heat Treatment of Metals, 2020, 45(12): 102-105.