奥氏体化温度对Cr5合金钢组织和性能的影响  

Influence of austenitizing temperature on microstructure and properties of Cr5 alloy steel

作　　者：李顺杰[1] 杨弋涛[1] 彭坤[1] 金曼[1] 邵光杰[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《金属热处理》2010年第1期110-113,共4页Heat Treatment of Metals

基　　金：科技部支撑项目(2007BAE51B04)

摘　　要：研究了Cr5钢经（810-1050）℃×1 h油冷处理后的组织和性能。结果表明,随着奥氏体化温度的提高,Cr5钢中的游离碳化物减少,细针状马氏体粗化,晶粒逐步长大。在930-950℃奥氏体化,淬火基体组织为隐针马氏体及弥散粒状M7C3型碳化物,且晶粒较小、硬度较高。The microstructure and properties of Cr5 steel heated at austenitizing temperatare 810-1050 ℃ for 1 h and then oil cooling were studied.The results show that with increase of austenitizing temperature,the free carbide inside the matrix decreases,acicular martensite coarsens and the grain size of matrix becomes bigger.The optimal austenitizing temperature is proposed to select the range of 930-950 ℃,which includes cryptocrystalline martensite and dispersive granular carbide M7C3,so the grain size of matrix is small and the hardness becomes higher.

关 键 词：Cr5钢 淬火工艺 显微组织 碳化物 力学性能 

分 类 号：TG156.31[金属学及工艺—热处理]