590 MPa级热轧双相高强钢轧后相变规律及扁卷预防措施

doi:10.13251/j.issn.0254-6051.2025.09.010

金属热处理 ›› 2025, Vol. 50 ›› Issue (9): 62-67.DOI: 10.13251/j.issn.0254-6051.2025.09.010

590 MPa级热轧双相高强钢轧后相变规律及扁卷预防措施

史建伟, 高江涛, 刘大亮, 武冠华, 齐建群, 蒋昭阳, 孙宏亮

唐山钢铁集团有限责任公司, 河北唐山 063016

收稿日期:2025-04-13 修回日期:2025-07-26 出版日期:2025-09-25 发布日期:2025-10-13
通讯作者: 高江涛,工程师,博士,E-mail: gjt19861009@163.com
作者简介:史建伟(1985—),男,高级工程师,硕士,主要研究方向为冷轧镀锌产品研发与质量管控,E-mail: Jianwei_shi@163.com。

Phase transformation mechanism and prevention measures for coil collapse of 590 MPa hot-rolled dual phase high-strength steel after rolling

Shi Jianwei, Gao Jiangtao, Liu Daliang, Wu Guanhua, Qi Jianqun, Jiang Zhaoyang, Sun Hongliang

Tangshan Iron and Steel Group Co., Ltd., Tangshan Hebei 063016, China

Received:2025-04-13 Revised:2025-07-26 Online:2025-09-25 Published:2025-10-13

摘要/Abstract

摘要： 采用JmatPro软件计算与试验测定相结合的方式,得到W590X钢的动态CCT曲线,深入探讨了590 MPa级热轧双相高强钢的轧后相变规律,并针对生产中常见扁卷缺陷提出了预防措施。结果表明,轧后低冷速下,W590X钢显微组织以铁素体和珠光体为主,强度和硬度较低;而高冷速下,过冷速较大,促进了贝氏体和马氏体的形成,显著提高钢材的硬度和强度。因此,通过精细控制冷却工艺,控制相变过程可有效预防扁卷缺陷的产生,具体措施为:一是调整卷取温度和冷却速度,优化珠光体含量和结构;二是加速相变过程,引入贝氏体相。

关键词: 双相高强钢, 相变, CCT曲线, 扁卷

Abstract: By combining JmatPro software calculation and experimental measurement, the dynamic CCT curve of W590X steel was obtained. The post rolling phase transformation law of 590 MPa hot-rolled dual phase high-strength steel was deeply explored, and prevention measures were proposed for common coil collapse defects in production. The results show that under low cooling rate after rolling, the microstructure of the W590X steel is mainly composed of ferrite and pearlite, with relatively low strength and hardness. In contrast, under high cooling rates, a relatively large degree of supercooling facilitates the formation of bainite and martensite, thereby significantly improving the hardness and strength of the steel. Therefore, the generation of coil collapse defects can be effectively prevented by precisely controlling the cooling process and regulating the phase transformation. The specific measures are as follows: First, adjust the coiling temperature and cooling rate to optimize the content and microstructure of pearlite. Second, accelerate the phase transformation process to introduce bainite.

Key words: dual phase high-strength steel, phase transformation, CCT curve, coil collapse

中图分类号:

TG142

史建伟, 高江涛, 刘大亮, 武冠华, 齐建群, 蒋昭阳, 孙宏亮. 590 MPa级热轧双相高强钢轧后相变规律及扁卷预防措施[J]. 金属热处理, 2025, 50(9): 62-67.

Shi Jianwei, Gao Jiangtao, Liu Daliang, Wu Guanhua, Qi Jianqun, Jiang Zhaoyang, Sun Hongliang. Phase transformation mechanism and prevention measures for coil collapse of 590 MPa hot-rolled dual phase high-strength steel after rolling[J]. Heat Treatment of Metals, 2025, 50(9): 62-67.

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590 MPa级热轧双相高强钢轧后相变规律及扁卷预防措施

Phase transformation mechanism and prevention measures for coil collapse of 590 MPa hot-rolled dual phase high-strength steel after rolling

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