基于JMatPro软件的超高强度钢强度设计  

Strength design of ultra-high strength steel based on JMatPro software

作　　者：盛伟[1] 陈天运[1] 李志[1] 柳木桐[1] 倪志铭[1] 

机构地区：[1]中国航发北京航空材料研究院,北京100095

出　　处：《金属热处理》2017年第6期157-160,共4页Heat Treatment of Metals

基　　金：总装预研基金项目(9140A12020113HK51157)

摘　　要：以M54合金成分为基础,利用JMatPro软件计算了碳、钴、镍元素含量对钴镍系超高强度钢强度性能的影响,以及M2C析出相体积分数随钼、铬、钨元素含量的变化规律,根据计算结果设计了一种新的超高强度钢。结果表明:合金中碳含量在0.25%~0.45%范围,钴含量在5%~15%范围,镍含量在5%~10%范围时,随碳、钴、镍元素含量增加,合金强度提高。钼元素含量为2%~3%,铬元素含量为1.5%~2.5%时,析出相体积分数为4%,具有较好的沉淀强化效果。设计合金成分为0.35C-10Co-10Ni-2.5Mo-2Cr-1.3W-0.5V。热处理后组织为回火马氏体组织以及弥散分布的纳米级棒状M2C析出相,抗拉强度最高可达2380MPa,与M54钢相比提高了360MPa。Based on the composition of M54 alloy,effects of the content of C,Co and Ni on the strength of Co-Ni ultra high strength steel were calculated by JMat Pro software,and the variation of the volume fraction of M_2C precipitate with the content of Mo,Cr and W was also calculated. A new ultra-high strength steel was designed according to the calculated results. The results show that the strength of alloy increases with the C,Co,Ni content increasing,when the C content is in the range of 0. 25%-0. 45%,Co content is 5%-15% and Ni content is 5%-10%. The good precipitation hardening effect can be attained when Mo content is 2%-3%,Cr content is 1. 5%-2. 5%,and the volume fraction of precipitation is 4%. The composition of designed alloy is 0. 35C-10Co-10Ni-2. 5Mo-2Cr-1. 3W-0. 5V. The microstructure of the alloy is tempered martensite with nanoscale dispersed rodlet carbides. The room temperature tensile strength of the designed alloy can reach 2380 MPa,which is 360 MPa higher than that of M54 steel.

关 键 词：超高强度钢 强度 JMatPro软件 析出相 M54合金 

分 类 号：TG142.1[一般工业技术—材料科学与工程]