Ni元素对Cr-Ni-Mn型铸造不锈钢TRIP效应的影响  

Effect of Nickel on TRIP Effect of Cr-Ni-Mn Cast Stainless Steel

作　　者：吴锜 熊云龙 魏彦鹏 关书文 时坚 高鹏 于波 WU Qi;XIONG Yun-long;WEI Yan-peng;GUAN Shu-wen;SHI Jian;GAO Peng;YU Bo(Shenyang Research Institute of Foundry Co.,Ltd.,State Key Laboratory of Light Alloy Casting Technology for High-End Equipment,Shenyang 110022,Liaoning,China)

机构地区：[1]沈阳铸造研究所有限公司,高端装备轻合金铸造技术国家重点实验室,辽宁沈阳110022

出　　处：《铸造》2021年第12期1406-1411,共6页Foundry

摘　　要：基于Schaeffler组织图及M_(d30),调控奥氏体的稳定性,引入TRIP效应,研究Ni元素对CrNi-Mn型铸造不锈钢TRIP效应的影响,探索了Ni含量(3%~9%)对Cr14-Nix-Mn6(x=4、6、9)铸造不锈钢的力学性能和组织演变的影响。结果表明,在Ni含量为4%时,由于奥氏体稳定性较低,形成了室温马氏体+少量奥氏体铸态组织。随着Ni含量的增加,在6%的镍含量下,观察到奥氏体+少量马氏体等铸态组织。此外,根据形变诱导马氏体的强度和塑性对变形机制的不同贡献,解释了合金拉伸性能对形变诱导马氏体量依赖性,以期为开发新型高性能铸造不锈钢提供借鉴。In this paper, based on Schaeffler diagram and MD30, the stability of austenite was adjusted and TRIP effect was introduced to study the influence of Ni element on the TRIP effect of Cr-Ni-Mn mold cast stainless steel.The effect of Ni content(3%-9%) on the mechanical properties and microstructure evolution of the Cr14-Nix-Mn6(x=4, 6, 9) cast stainless steels was studied. The results show that the as-cast microstructure of room temperature martensite and a small amount of austenite was formed when the Ni content was 4% due to the low stability of austenite. With the increase of the Ni content, the as-cast microstructure, such as austenite + a small amount of martensite, was observed at the nickel content of 6%. According to the different contributions of the strength and plasticity of the deforming-induced martensite to the deformation mechanism, the dependence of the tensile properties on the amount of transformation induced martensite was explained, in order to provide a reference for the development of new high performance cast stainless steels.

关 键 词：铸造不锈钢 相变诱发塑性 镍含量 组织演变 

分 类 号：TG142.71[一般工业技术—材料科学与工程]