离子氮碳共渗与离子渗氮复合处理对45钢组织与性能的影响  

Effects of Complex Treatment of Plasma Nitrocarburizing and Plasma Nitriding on Microstructure and Properties of 45 Steel

作　　者：缪斌[1] 李景才[1,2] 孙泉[1] 沾宪宪 胡静[1,3] 

机构地区：[1]常州大学江苏省表面工程科学与技术重点实验室,江苏常州213164 [2]常州赛菲斯科技有限公司,江苏常州213164 [3]常州大学江苏省光伏科学与工程协同创新中心,江苏常州213164 [4]天龙科技炉业(无锡)有限公司,江苏无锡214105

出　　处：《中国表面工程》2016年第4期30-34,共5页China Surface Engineering

基　　金：江苏省科技支撑计划资助项目(BE2012054);江苏省研究生创新基金(SCZ100431322)

摘　　要：为进一步提高渗层厚度及渗层性能,对45钢进行离子氮碳共渗与离子渗氮复合处理。采用扫描电镜、X射线衍射仪、显微硬度计和光学显微镜对渗层厚度、物相组成、截面与表面硬度、渗层脆性进行了分析。结果表明,复合处理可使45钢获得比单一离子渗氮或离子氮碳共渗更快的渗速、更优的性能。相同的处理时间下,复合处理渗层厚度比单一离子渗氮或离子氮碳共渗大幅度增加,有效硬化层比单一离子渗氮增加约35μm,提高约1倍,同时渗层脆性显著降低。物相分析表明复合处理后化合物层中ε相和γ'相的相对含量发生了变化,即ε相增多,而γ′相减少。To further enhance the compound layer thickness and its properties, a complex treatment of plasma nitrocarburizing and nitriding was carried out for 45 steel. The thickness, phase constituents, cross-sectional and surface microhardness, and frangibility of the nitrided layer were investigated by means of scanning electron microscopy （SEM）, X-ray diffraction （XRD）, microhardness tester and optical microscope （OM）. The results show that higher efficiency and better properties are obtained after the complex treatment for 45 steel. The nitrided layer thickness is increased significantly, and the effective hardening layer increased above 35 μm, nearly doubled. Meanwhile, the frangibility of the nitrided layer is decreased notably. The relative amount of ε phase in the compound layer is increased, but that ofγ′ is reduced.

关 键 词：离子氮碳共渗 45钢 离子渗氮 化合物层 显微硬度 

分 类 号：TG156.8[金属学及工艺—热处理]