20CrMnMo钢稀土渗碳研究  

Study on RE Carburizing of 20CrMnMo Steel

作　　者：徐建军[1,2] 杜晓东[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]安徽电子信息职业技术学院,安徽蚌埠233000

出　　处：《沈阳农业大学学报》2012年第2期241-244,共4页Journal of Shenyang Agricultural University

基　　金：国家"973"计划资助项目(2011CB013402)

摘　　要：采用稀土渗碳工艺对20CrMnMo钢进行渗碳处理,研究了渗层增厚的动力学、渗碳层组织和性能。结果表明:稀土渗碳层中沉淀析出了大量弥散分布的粒状碳化物,淬火后表层组织为针状马氏体、大量细小颗粒碳化物、少量残余奥氏体。渗碳层的硬度与传统工艺相比提高了10%,耐磨性提高了32%,接触疲劳寿命也有大幅提高。RE carburization was carried out on 20CrMnMo steel.The carburizing kinetics of carburizing depth was dealed with,the microstructure of the carburized layer was observed,the hardness and abrasion resistance of the carburized layer were examined.The results show that a large amount of dispersed granular carbides precipitated in the carburized layer of 20CrMnMo steel RE carburized.The microstructure of surface layer after directly quenching consists of acicular martensite,fine granular carbides and a little residual austenite.The test results showed 10 persent improvement in hardness,32 persent improvement in abrasion resistance,The touching fatigue life is sharply improved too.

关 键 词：20CRMNMO钢 稀土渗碳 显微组织 硬度 耐磨性 

分 类 号：TG156.81[金属学及工艺—热处理]