| 合金元素含量对汽车大梁用610L钢组织与性能的影响 |
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| 引用本文： | 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. |
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| 作者姓名： | 杨文卿 师可新 董军海 孙胜辉 蔡明晖 张晓明 丁桦 |
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| 作者单位： | 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 |
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| 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。
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| 关 键 词： | 汽车大梁钢 微合金化 控轧控冷 组织 力学性能 |
Effect of alloying element content on microstructure and mechanical properties of 610L steel for automobile beam |
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| 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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| Authors: | Yang Wenqing Shi Kexin Dong Junhai Sun Shenghui Cai Minghui Zhang Xiaoming Ding Hua |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | automotive beam steel microalloying thermo-mechanical control process microstructure mechanical properties |
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