摘要
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%。
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%.
作者
李帅帅
王昕
贾建文
杜华云
卫英慧
侯利锋
LI Shuai-shuai;WANG Xin;JIA Jian-wen;DU Hua-yun;WEI Ying-hui;HOU Li-feng(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Engineering Research Center for Corrosion&Protection,Taiyuan 030024,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2024年第1期123-130,共8页
Transactions of Materials and Heat Treatment
基金
山西省重点研发计划(202102050201007,2022ZDYF040)
山西省科技创新人才团队专项计划(202204051001004)
山西浙大新材料与化工研究院项目(2022SZ-TD007)
中央引导地方科技发展资金项目(YDZJSX2021B004)
吕梁市引进高层次科技人才重点研发项目(Rc2020-109)。
关键词
中锰钢
淬火处理
残留奥氏体
马氏体
medium-Mn steel
quenching treatment
retained austenite
martensite
