二次调质离子渗氮工艺参数对35CrMo钢耐蚀性的影响  

Effect of process parameters of secondary quenching and tempering and plasma nitriding on corrosion resistance of 35CrMo steel

作　　者：冯涛[1] 杨武虎[1] 孙永兴[1] 

机构地区：[1]中国石油大学(华东)机电工程学院,山东东营257061

出　　处：《金属热处理》2012年第6期59-62,共4页Heat Treatment of Metals

基　　金：中央高校基本科研业务费专项资金(11CX04038A)

摘　　要：采用不同的回火温度、渗氮温度和N2与H2的比例,对35CrMo钢进行热处理,通过正交试验分析这些参数对渗氮层耐蚀性的影响。结果表明,最佳的耐蚀性热处理工艺为回火温度550℃、渗氮温度540℃、氮气与氢气流量比为1∶5。XRD分析表明白亮层组织以γ'相为主,并含一定量的α-Fe(N)和ε相,这种组织有很好的耐蚀性,且具有较小的的脆性。Under different tempering temperature and nitriding temperature and proportion of N2 and H2 , 35CrMo steel was heat treated. The influence of these parameters on the corrosion resistance of nitrided steel was analysed through orthogonal test. The results show that the best heat treatment process for corrosion resistance is tempering at 550 ℃, nitriding at 540 ℃ and N2：H2 = 1：5. The microstructure of white layer is mainly composed of γ＇ phase, and a few of α-Fe（N） and ε by XRD analysis. This microstructure has very good corrosion resistance and less brittle.

关 键 词：35CRMO钢 二次调质 离子渗氮 耐蚀性 

分 类 号：TG156.8[金属学及工艺—热处理]