低碳钢表面脉冲单电源等离子渗铬合金化的研究  

Research on Plasma Chromizing Alloying with Single Pulse Power Supply on Low-carbon Steel Surface

作　　者：高原[1] 马志康[1] 蔡航伟[1] 王成磊[1] 

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004

出　　处：《热加工工艺》2012年第10期140-142,共3页Hot Working Technology

基　　金：国家自然科学基金项目(50764002);信息材料广西重点实验室主任研究课题(桂科能0710908-06-Z);广西区自然科学基金重点项目(2010GXNSFD013008)

摘　　要：利用脉冲单电源等离子渗金属技术,在低碳钢表面进行渗铬研究。采用X射线衍射仪、扫描电镜、能谱仪、光学显微镜以及光电温度计分析检测了渗层表面相的结构、表面微观形貌、表面成分以及试样温度。结果在等离子渗铬过程中发生了反应扩散,渗层表面的相结构为铁铬固溶体,渗铬层为白亮层,与基体间有一条明显的分界线。检测结果表明:在一定范围内,随着气压的升高,渗层厚度和表面含铬量增加,但超过临界值时,渗层厚度和表面含铬量反而下降;随保温时间的延长,电压或温度的升高,渗层厚度和表面含铬量均增加。The chromizing process was realized by plasma alloying with single pulse power supply on low-carbon steel surface.The phase-structure,morphology,composition of chromizing layer and the sample temperature were measured by XRD,SEM,EDS,optical microscope and photoelectric thermometer.The phase-structure of chromizing layer is Fe-Cr solid solution and its surface shows bright white.Reaction-diffusion existes during chromizing process and there is a visible dividing line between the diffusion layer and the substrate.The results show that the chromizing layer thickness and surface Cr content rises within limits,when the pressure ascends but when it exceeds the critical value,the thickness and surface Cr content of chromizing layer rises.

关 键 词：等离子 渗铬 渗层厚度 

分 类 号：TG156.88[金属学及工艺—热处理]