低碳钢液相等离子体电解硼碳共渗层生长特性研究  

Growth Mechanism of Boride Layer Formed via Plasma Electrolytic Borocarburizing on Surface of Low-carbon Steel

作　　者：王彬[1] 薛文斌[2,3] 陈琳[2] 魏克俭[2] 吴正龙[4] WANG Bin XUE Wenbin CHEN Lin WEI Kejian WU Zhenglong(College of Arts and Science, Shanxi Agricultural University, Taigu 030801 College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 Beijing Radiation Center, Beijing 100875 Analytical and Testing Center, Beijing Normal University, Beijing 100875)

机构地区：[1]山西农业大学文理学院,太谷030801 [2]北京师范大学核科学与技术学院,北京100875 [3]北京市辐射中心,北京100875 [4]北京师范大学分析测试中心,北京100875

出　　处：《材料导报》2017年第14期67-71,共5页Materials Reports

基　　金：山西农业大学科技创新基金(2015YJ02);国家自然科学基金(51671032;51071031)

摘　　要：在含有硼砂和甘油的电解液中对Q235低碳钢表面进行液相等离子体电解硼碳二元共渗(PEB/C)处理,研究不同时间条件下PEB/C共渗层的组织形貌,着重探讨了PEB/C二元共渗过程中电解质的分解反应和渗硼层快速生长机理。结果表明,在330V电压条件下,经过6min PEB/C处理后,在样品表面开始生成不连续的岛状硼化物;而经过30min PEB/C处理后,可以形成主要由Fe2B相组成的均匀致密的渗硼层,渗硼层的硬度可以达到1 800HV,厚度约为20μm。PEB/C共渗样品渗硼层的生长过程主要包括共渗初期阶段、生成岛状硼化物阶段和渗硼层均匀生长阶段。Q235low carbon steel was treated by plasma electrolytic borocarburizing（PEB/C）technique in borax solution with glycerinum additive.At different treatment time,the structure and morphology of borocarburizing layer on Q235low-carbon steel were investigated.The decomposition reaction of electrolyte and the growth mechanism of boride layer in the PEB/C process were emphatically discussed.The results show that the Q235low-carbon steel forms a compact boride layer about 20μm thick after 30 min PEB/C treatment at 330 V.The boride layer mainly consists of Fe2 B phase,and the hardness of boride layer can reach 1 800 HV.The growth process of boride layer in the PEB/C process involves initial stage,the generation of island boride and the uniform growth of boride layer.

关 键 词：等离子体电解渗 硼碳二元共渗 生长机制 低碳钢 

分 类 号：TG156.8[金属学及工艺—热处理]