离子渗氮工艺对液压柱塞用38CrMoAl钢组织和性能的影响  

Effect of plasma nitriding process on microstructure and properties of 38CrMoAl steel for hydraulic plunger

作　　者：陈尧[1] 宋磊[1] 张宸恺[1] 叶雪梅 胡静[1] 

机构地区：[1]常州大学材料科学与工程学院江苏省材料表面科学与技术重点实验室,江苏常州213164 [2]江苏恒立液压股份有限公司,江苏常州213134

出　　处：《金属热处理》2016年第11期190-193,共4页Heat Treatment of Metals

基　　金：江苏省科技成果转化项目(BA2013078);江苏省研究生创新基金项目

摘　　要：对液压柱塞用38CrMoAl钢进行了低温离子渗氮,采用金相显微镜、X射线衍射仪、显微硬度计对处理后的38CrMoAl钢试样的显微组织、表面硬度和渗层脆性进行了分析。研究结果表明,相比于510℃常规离子渗氮,38CrMoAl钢经450℃×6 h低温离子渗氮后无白亮层产生,且XRD表明38CrMoAl钢表面无γ'-Fe_4N相生成。同时,压痕周围无裂纹产生且硬度高于510℃×6 h常规离子渗氮。Lower temperature plasma nitriding was carried out on 38 CrMoAl steel for hydraulic plunger. Optical microscope,X-ray diffractometer and micro-hardness meter were used to investigate the microstructure,surface hardness and brittleness of the nitrided case.The results show that no white bright layer is formed after plasma nitrided at 450 ℃ for 6 h,and XRD result also confirms that there is no γ＇-Fe4N phase existing on the case. Meanwhile,there is no crack around the indentation of the samples and the surface hardness is higher than that of the conventional one plasma nitrided at 510 ℃ for 6 h.

关 键 词：38CRMOAL钢 离子渗氮 液压柱塞 显微组织 脆性 

分 类 号：TG156.82[金属学及工艺—热处理]