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淬火处理对中锰钢组织和性能的影响

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中锰钢通过微观组织调控,可实现优异的强度-塑韧性协同增长,是第三代先进高强钢的潜力材料.采用不同淬火工艺来调控Fe-10Mn-0.44C-1.87Al-0.67V中锰钢的微观组织,并结合VC的析出来优化其性能.结果表明:经1020 ℃淬火+300 ℃回火后,中锰钢的组织为板条状马氏体+残留奥氏体,形变时残留奥氏体发生相变诱导塑性效应,使其具有优异的塑性.经800℃淬火+250℃回火后,组织为细小的马氏体、细小弥散分布的VC和少量残留奥氏体,通过位错强化、细晶强化和析出强化作用使中锰钢具有最佳的力学性能,屈服强度为1190 MPa,抗拉强度为1473 MPa,伸长率为22％,强塑积为32.4 GPa％.
Effect of quenching treatment on microstructure and properties of medium-Mn steel
Medium-Mn steel can achieve excellent strength plasticity toughness synergistic growth through microstructure regulation,making it a potential material for the third generation of advanced high-strength steel.Microstructure of Fe-10Mn-0.44C-1.87Al-0.67V medium-Mn steel was adjusted by different quenching processes,and its properties were optimized through the precipitation of VC.The results show that after quenching at 1020 ℃ and tempering at 300 ℃,the microstructure of the medium-Mn steel is lath martensite+retained austenite,and the retained austenite has transformation induced plasticity effect during deformation,which makes it have excellent plasticity.After quenching at 800 ℃+tempering at 250 ℃,the microstructure is fine martensite,fine dispersed VC and a small amount of retained austenite.Through dislocation strengthening,grain refinement strengthening and precipitation strengthening,the medium-Mn steel has the best mechanical properties,with the yield strength of 1190 MPa,the tensile strength of 1473 MPa,the elongation of 22％,and the product of strength and plasticity of 32.4 GPa％.

medium-Mn steelquenching treatmentretained austenitemartensite

李帅帅、王昕、贾建文、杜华云、卫英慧、侯利锋

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太原理工大学材料科学与工程学院,山西太原 030024

山西省金属材料腐蚀与防护工程技术研究中心,山西太原 030024

中锰钢 淬火处理 残留奥氏体 马氏体

山西省重点研发计划山西省重点研发计划山西省科技创新人才团队专项计划山西浙大新材料与化工研究院项目中央引导地方科技发展资金项目吕梁市引进高层次科技人才重点研发项目

2021020502010072022ZDYF0402022040510010042022SZ-TD007YDZJSX2021B004Rc2020-109

2024

10.13289/j.issn.1009-6264.2023-0230

材料热处理学报
中国机械工程学会

材料热处理学报

CSTPCD北大核心
影响因子：0.958
ISSN：1009-6264
年,卷(期)：2024.45(1)
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