钒对7Mn钢冷轧过程组织和力学性能的影响  

Effect of vanadium on the microstructure and mechanical properties of 7Mn steel during cold rolling process

作　　者：余海存 吕玮 李宁 魏海东[3] 王旭明 余涛 丁万武 Yu Haicun;LüWei;Li Ning;Wei Haidong;Wang Xuming;Yu Tao;Ding Wanwu(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Lanzhou University of Technology,State Key Laboratory of Advanced Processing and Reuse of Nonferrous Metals,Lanzhou 730050,Gansu,China;Casting and Forging Branch,Lanzhou Lanshi Group Co.,Ltd.,Lanzhou 730000,Gansu,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州理工大学,省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [3]兰州兰石集团有限公司铸锻分公司,甘肃兰州730000

出　　处：《钢铁钒钛》2024年第5期167-172,共6页Iron Steel Vanadium Titanium

基　　金：甘肃省科技重大专项(22ZD6GA008);国家自然科学基金资助项目(52161006);中国博士后科学基金项目(2019M653896XB);甘肃省教育厅产业支持计划项目(2021CYZC-23);甘肃省重点研发计划项目(21YF5GD183)。

摘　　要：在7Mn中锰钢的基础上,向其添加不同含量的V元素,通过冷轧及退火处理,初步探究0.1%~0.3%V添加量对其组织和力学性能的影响规律。结果表明,当V添加量为0.3%时,试验钢的综合力学性能最优,屈服强度为993.96 MPa,抗拉强度为1164.56 MPa,伸长率为37.55%,强塑积为43.73 GPa·%,这是由于V在钢中形成细小弥散的第二相,在细晶强化、第二相强化和TRIP效应的共同作用下提高了试验钢的综合力学性能。On the basis of 7Mn medium manganese steel,different contents of V element were added.Through cold rolling and annealing treatment,the influence of 0.1%~0.3%V addition on the microstructure and mechanical properties of the steel was preliminarily explored.The experimental results show that when the content of V is 0.3%,the comprehensive mechanical properties of the experimental steel are the best.The yield strength is 993.96 MPa,with the tensile strength 1164.56 MPa,the elongation 37.55%,and the strength and elongation product 43.73 GPa·%.This is because V forms a fine and dispersed second phase in the steel,which improves the comprehensive mechanical properties of the experimental steel under the combined effects of fine grain strengthening,second phase strengthening and TRIP effect.

关 键 词：中锰钢 V微合金化 TRIP效应 力学性能 

分 类 号：TF76[冶金工程—钢铁冶金] TF704.2