合金元素含量对汽车大梁用610L钢组织与性能的影响

doi:10.13251/j.issn.0254-6051.2023.01.008

金属热处理 ›› 2023, Vol. 48 ›› Issue (1): 40-45.DOI: 10.13251/j.issn.0254-6051.2023.01.008

合金元素含量对汽车大梁用610L钢组织与性能的影响

杨文卿^1,2, 师可新³, 董军海³, 孙胜辉^1,2, 蔡明晖^1,2,4, 张晓明⁴, 丁桦^1,2,4

1.东北大学材料科学与工程学院, 辽宁沈阳 110819;
2.东北大学辽宁省轻量化用关键金属结构材料重点实验室, 辽宁沈阳 110819;
3.唐山不锈钢有限责任公司, 河北唐山 063000;
4.东北大学轧制技术及连轧自动化国家重点实验室, 辽宁沈阳 110819

出版日期:2023-01-25 发布日期:2023-02-03
通讯作者: 丁桦,教授,E-mail:hding@263.net
作者简介:杨文卿(1997—),男,硕士研究生,主要研究方向为汽车大梁用钢的工艺和组织调控, E-mail:619808679@qq.com。

Effect of alloying element content on microstructure and mechanical properties of 610L steel for automobile beam

Yang Wenqing^1,2, Shi Kexin³, Dong Junhai³, Sun Shenghui^1,2, Cai Minghui^1,2,4, Zhang Xiaoming⁴, Ding Hua^1,2,4

1. School of Materials and Science Engineering, Northeastern University, Shenyang Liaoning 110819, China;
2. Key Lab of Lightweight Structural Materials of Liaoning Province, Northeastern University, Shenyang Liaoning 110819, China;
3. Tangshan Stainless Steel Co., Ltd., Tangshan Hebei 063000, China;
4. State Key Lab of Rolling and Automation, Northeastern University, Shenyang Liaoning 110819, China

Online:2023-01-25 Published:2023-02-03

摘要/Abstract

摘要： 采用“调Si、降Nb、加Ti”的合金设计理念,结合优化的控轧控冷工艺,开发出一种新型汽车大梁用610 MPa级Ti-Nb-Si系低碳微合金钢。结果表明,当Si、Nb和Ti的质量分数分别为0.04%、0.03%和0.06%时,试验钢在热轧后水冷(15~20 ℃/s)至卷取温度时的显微组织为铁素体+珠光体,且在铁素体基体内分布着高密度的纳米析出相,综合力学性能较好,屈服强度为539 MPa, 抗拉强度为633 MPa,伸长率为20.5%,扩孔率为66.4%,各项力学性能和扩孔性能均满足汽车大梁用610L钢的性能要求。

关键词: 汽车大梁钢, 微合金化, 控轧控冷, 组织, 力学性能

Abstract: A new type of 610 MPa grade Ti-Nb-Si microalloyed low carbon steel for automotive beam was designed based on the alloy design concept of increasing Si slightly, reducing Nb and raising Ti, combining with optimizing the thermo-mechanical control process (TMCP) parameters. The results show that the microstructure of the steel with 0.04%Si, 0.03%Nb and 0.06%Ti water cooled (15-20 ℃/s) to the coiling temperature after hot rolling is ferrite + pearlite, with high density nano-precipitates distributing in the ferrite matrix, exhibiting a good comprehensive properties with the yield strength of 539 MPa,the tensile strength of 633 MPa, the elongation of 20.5% and the hole expansion ratio of 66.4%, all meeting the requirements of both the mechanical properties and the hole expansion formability of 610L steel.

Key words: automotive beam steel, microalloying, thermo-mechanical control process, microstructure, mechanical properties

中图分类号:

TG142.1

杨文卿, 师可新, 董军海, 孙胜辉, 蔡明晖, 张晓明, 丁桦. 合金元素含量对汽车大梁用610L钢组织与性能的影响[J]. 金属热处理, 2023, 48(1): 40-45.

Yang Wenqing, Shi Kexin, Dong Junhai, Sun Shenghui, Cai Minghui, Zhang Xiaoming, Ding Hua. Effect of alloying element content on microstructure and mechanical properties of 610L steel for automobile beam[J]. Heat Treatment of Metals, 2023, 48(1): 40-45.

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合金元素含量对汽车大梁用610L钢组织与性能的影响

Effect of alloying element content on microstructure and mechanical properties of 610L steel for automobile beam

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