槽电压对纯铁表面液相等离子体电解硼碳氮三元共渗层摩擦磨损性能的影响  

Influence of Bath Voltages on Wear Performance of Plasma Electrolytic Borocarbonitriding Layer on Pure Iron

作　　者：金小越[1,2] 吴杰[1,2] 杨璇[1,2] 王彬[3] 陈琳[1,2] 曲尧 薛文斌[1,2] 

机构地区：[1]北京师范大学核科学与技术学院射线束技术与材料改性教育部重点实验室,北京100875 [2]北京市辐射中心,北京100875 [3]山西农业大学文理学院,山西太谷030801

出　　处：《材料工程》2017年第4期58-64,共7页Journal of Materials Engineering

基　　金：国家自然科学基金项目(51071031);北京市自然科学基金项目(2122017);高等学校博士学科点专项科研基金(20120003110010);中央高校基本科研业务费专项资金项目(211105562GK)

摘　　要：利用液相等离子体电解渗技术分别在340,360V和380V槽电压下对纯铁进行硼碳氮三元共渗(PEB/C/N)表面处理。分析纯铁表面PEB/C/N共渗层的形貌、成分、相组成和显微硬度分布。采用球-盘摩擦磨损仪评估槽电压对渗层摩擦磨损性能的影响,并分析渗层与ZrO_2球对磨时磨损机理。纯铁表面的PEB/C/N三元共渗层厚度随着放电电压升高而增大,最高硬度也相应增加。380V处理1h后硼碳氮三元共渗层中渗硼层和过渡层厚度分别达到26μm和34μm,渗层最高硬度可以达到2318HV。硼碳氮三元共渗层的磨损率仅为纯铁基体的1/10。硼碳氮共渗处理大幅度降低纯铁的摩擦因数和磨损率,但不同槽电压下制备的PEB/C/N共渗层的摩擦因数和磨损率变化较小。Plasma electrolytic borocarbonitriding(PEB/C/N)was successfully used to achieve ternary borocarbonitriding layer on industrial pure iron at the bath voltages of 340,360V and 380V respectively.The morphology,composition,phase constituents and microhardness profiles of PEB/C/N layers were investigated.The influence of bath voltages on wear behaviors of PEB/C/N layers was evaluated by ball-disc friction and wear tester under dry sliding against ZrO_2 ball,and their wear mechanism were analyzed.The results show that the thickness and maximum hardness of PEB/C/N layer on pure iron increase with the increase of bath voltage.After 1hdischarge treatment at 380 V,the boride layer and transition layer of the PEB/C/N sample reach 26μm and 34μm respectively,and the maximum microhardness of PEB/C/N layer can reach 2318 HV.The wear rate of PEB/C/N layer is only 1/10 of that of the pure iron substrate.The friction coefficient and wear rate of pure iron are greatly reduced after the PEB/C/N surface treatment,but the friction coefficient and wear rate of PEB/C/N layer vary little under different bath voltages.

关 键 词：液相等离子体电解渗 硼碳氮共渗 摩擦磨损 纯铁 

分 类 号：TG156.8[金属学及工艺—热处理]