高碳双相不锈钢15Cr23Ni10MoCuV的组织和硬度  

Study on Microstructure and Hardness of 15Cr23Ni10MoCuV Duplex Stainless Steel With High Carbon

作　　者：赵忠魁[1] 潘英才[1] 高青[1] 张恒凯 

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101

出　　处：《钢铁研究学报》2013年第12期35-40,共6页Journal of Iron and Steel Research

基　　金：山东省科学技术发展计划资助项目(2010GGX10328)

摘　　要：对高碳双相不锈钢15Cr23Ni10MoCuV进行不同温度固溶处理和时效处理后,采用光学显微镜(OM)、扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)对其进行组织变化的分析,再通过硬度试验探究和分析了不同固溶和时效温度对合金硬度的影响。结果表明:该双相不锈钢经热轧后,在基体中出现了颗粒状的铬的碳化物,当固溶温度达到1 250℃时它被完全溶解;经1 150℃固溶处理后,铁素体相与奥氏体相的体积比接近1,且此时合金硬度值最低(HB 204);经不同温度时效处理后,出现了两个硬度峰值,分别对应于400℃(HB 266)和750℃(HB 295),前者是因为铁素体相中发生了调幅分解以及奥氏体相中富铜相的析出,后者则主要是因为在铁素体相中析出了大量的σ相。Solution treatment and aging treatment of 15Cr23Ni10MoCuV duplex stainless steel was performed at different temperatures. Microstructure evolution and properties of the steel were examined by means of OM, SEM, EDS, XRD analysis, hardness measurement. The results show that a large number of granular chromium carbides can be precipitated in the matrix after hot-rolled, when the solution treatment at 1250 ℃ the chromium carbides will completely dissolved. When solution treated at 1 150 ℃, the hardness value of the steel is the lowest. Subject to aging treatments at temperatures of 200--800 ℃, there will be two hardness peaks, corresponding to at 400 ℃ （HB 266） and 750 ℃（HB 295）. The former is the occurrence of spinodal decomposition in the ferrite and the rich copper phase precipitated in the austenite, while the latter is mainly the emergence of a large number of the σ phase in the ferrite..

关 键 词：高碳双相不锈钢 铬的碳化物 富铜相 Σ相 

分 类 号：TG142.71[一般工业技术—材料科学与工程]