奥氏体不锈钢活性屏离子渗碳机理的研究  

Mechanism of Active Screen Plasma Carburizing of Austenitic Stainless Steel

作　　者：郑少梅[1,2] 赵程[1] 

机构地区：[1]青岛理工大学机械工程学院,青岛266033 [2]青岛科技大学表面技术研究所,青岛266061

出　　处：《青岛理工大学学报》2011年第6期100-103,109,共5页Journal of Qingdao University of Technology

基　　金：国家自然科学基金(50702029);山东省自然科学基金(ZR2010EM018)

摘　　要：分别采用活性屏离子渗碳和直流离子渗碳工艺对奥氏体不锈钢进行了渗碳处理.试验结果表明,活性屏离子渗碳可以获得与普通直流离子渗碳同样的处理效果,在奥氏体不锈钢表面获得单一的Sc相组织,从而显著提高奥氏体不锈钢的硬度和耐磨性能,并能克服直流离子渗碳工艺中的不足.收集活性屏上溅射下来的粒子进行分析,结果表明这些纳米级粒子主要是中性的Fe3C和Fe2C5,它们是活性屏渗碳过程中活性碳原子的载体.通过对活性屏离子渗碳机理的探讨,认为和活性屏离子渗氮的机理相似,也是一个溅射—吸附—脱附的过程.Austenitic stainless steel was carburized by means of the active screen plasma carburizing （ASPC） and direct current plasma carburizing（DCPC）. The experimental results show that ASPC can achieve the similar carburizing effect to that of DCPC. A layer of carbon supersaturated solid solution （i. e. the Sc phase） can be formed on the steel surface so as to improve the hardness and wear resistance of the austenitic stainless steel. ASPC also solves some problems associated with the conventional DCPC. Particles sputtered from the active screen were collected and analyzed. The results showed that the sputtered particles with sizes in sub-micron scale were neutral F%C and Fe2Cs. The particles play the role of the carbon carrier in ASPC. Therefore, ASPC is also a multi-stage process, involving sputtering, adsorption and desorption, the same as active screen plasma nitriding.

关 键 词：活性屏离子渗碳 直流离子渗碳 奥氏体不锈钢 渗碳机理 

分 类 号：TG156.83[金属学及工艺—热处理]