基于Thermo-Calc 软件的高氮4Cr13 马氏体不锈钢设计与实践  

Design and practice of high nitrogen 4Cr13 martensitic stainless steel based on Thermo-Calc software

作　　者：肖强 于辉[2] 罗许 康琴 蔡武[3] 胡峰荣 吴欣容 Xiao Qiang;Yu Hui;Luo Xu;Kang Qin;Cai Wu;Hu Fengrong;Wu Xinrong(State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000 Sichuan,China;School of Mechanical Engineering,Yanshan University,Qin huangdao 066000 Hebei,China;Sichuan Changcheng Special Steel Co.,Ltd.,Pangang Group,Jiangyou 621701 Sichuan,China)

机构地区：[1]钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]燕山大学机械工程学院,河北秦皇岛066000 [3]攀钢集团江油长城特殊钢有限公司,四川江油621701

出　　处：《特钢技术》2022年第3期30-32,共3页Special Steel Technology

基　　金：四川省杰出青年科技人才计划资助,项目编号2022JDJQ0029。

摘　　要：利用Thermo-Calc热力学软件计算了4Cr13钢的相图和性质图,获得了氮溶解度曲线变化规律,并在实验室通过真空冶炼制备了氮质量分数分别为0.054%(1#)和0.098%(2#)的试验钢,结果表明:4Cr13钢氮溶解随着温度降低先增加后降低然后再增加的变化趋势,出现了“鼻尖点”,所对应的最大氮质量分数不超过0.1%。同时,氮的加入导致了HCP_A3#·2(Cr_(2)N)相的析出,抑制了M_(23)C_(6)型碳化物的析出。盐雾试验结果表明,1#和2#试验钢的耐蚀性较普通4Cr13钢更加优异,且随着氮含量的增加,耐蚀性进一步提高。The phase diagrams and property diagrams of 4Cr13 steel were calculated by Thermo-Calc thermodynamics software,and the change rule of nitrogen solubility curve was obtained.The 4Cr13 steels with nitrogen mass fraction of 0.054%(1^(#))and 0.098%(2^(#))were prepared by vacuum smelting in the laboratory.The results show that with the decrease of temperature,the nitrogen dissolution of 4Cr13 steel first increased,then decreased and then increased,and the"nose tip"appeared,corresponding to the maximum nitrogen mass fraction is less than 0.1%.At the same time,the addition of nitrogen leads to the precipitation of HCP_A3^(#)2(Cr2N)phase,and inhibits the precipitation of M_(23)C_(6) carbides.The salt spray test results show that the corrosion resistance of test steel 1#and 2^(#)is better than that of ordinary 4Cr13 steel,and the corrosion resistance is further improved with the increase of nitrogen content.

关 键 词：4CR13钢 THERMO-CALC 热力学 耐蚀性 

分 类 号：TG142.71[一般工业技术—材料科学与工程]