热处理工艺对超级马氏体钢逆变奥氏体的影响  

Effect of heat treatment technology on reversed austenite in super martensitic stainless steel

作　　者：姜雯[1] 赵昆渝[1] 业冬[1] 李俊[1] 苏杰[2] 雍岐龙[2] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]钢铁研究总院结构所,北京100081

出　　处：《钢铁》2015年第2期70-75,共6页Iron and Steel

摘　　要：试验采用光学显微镜、X射线衍射仪（XRD）、透射电镜（TEM）及能谱分析（EDS）等手段,研究不同铬含量的超级马氏体不锈钢在相同热处理工艺下逆变奥氏体含量、组织形貌及生长规律的异同。结果表明,13Cr和15Cr两试验钢经淬火＋回火后的显微组织为回火马氏体和逆变奥氏体,两试验钢中逆变奥氏体含量及尺寸均随着回火温度升高先增加再减小,且在650-700℃时达到最大。两试验钢内的逆变奥氏体在回溶过程中会对基体组织产生细化作用。通过对比发现,15Cr钢中的逆变奥氏体含量更多,尺寸更大,回溶时对基体的细化作用更明显。The effect of adding different content of Cr to the super martensitic stainless steel（SMSS） on formation of reversed austenite subjected to quenching and tempering by using optical microscope（OM）,X-ray diffraction（XRD）,transmission electron microscope（TEM） and energy dispersive spectrometer（EDS） was studied. The experimental results indicate that the microstructures of two tested steels were tempered martensite and reversed austenite after tempering. The volume fraction and grain size of reversed austenite in two tested steels increased first and then decreased with the increase of tempering temperature,which reached the maximum at 650-700 ℃. When the reversed austenite re-dissolved and transformed to martensite,there was an effect of refinement on the matrix. Compared with 13 Cr steels,the reversed austenite in 15 Cr steels was more and the size was bigger. The effect of refinement on the matrix was more obvious.

关 键 词：超级马氏体不锈钢 逆变奥氏体 铬 镍 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]