渗碳气氛对奥氏体不锈钢低温离子渗碳的影响  

Influence of carburizing atmosphere on low temperature plasma carburizing of austenitic stainless steel

作　　者：王世国[1] 杜威[1] 牛强[1] 赵程[1] 

机构地区：[1]青岛科技大学机电工程学院表面技术研究所,山东青岛266061

出　　处：《金属热处理》2015年第5期117-120,共4页Heat Treatment of Metals

基　　金：山东省自然科学基金(ZR2010EM018)

摘　　要：奥氏体不锈钢低温离子渗碳处理是一种能在不降低耐蚀性能的前提下显著提高其表面硬度的有效方法。本文研究了奥氏体不锈钢低温离子渗碳气体比例及炉内压强对渗碳层硬度及厚度的影响。试验结果表明,炉内气体比例及压强对渗碳层硬度及厚度都有较大的影响。当氢气与甲烷比例为(20~30)∶1、气体压强为400 Pa时,渗碳层的硬度最高,硬化层最厚。Low temperature plasma carburizing of austenitic stainless steel is an effective process to improve the surface hardness of austenitic stainless steel without decreasing its corrosion resistance.The effect of gas ratios and pressure in the furnace on hardness and thickness of the carburized layer was investigated.Experimental results show that both gas radios and pressure in the furnace have a great impact on the hardness and thickness of the carburized layer.The maximum hardness and hardened depth of the carburized layer can be obtained with the hydrogen/methane ratio in the range of (20 ～ 30):1 and the gas pressure of 400 Pa.

关 键 词：奥氏体不锈钢 低温离子渗碳 气体比例 炉内压强 

分 类 号：TG156.81[金属学及工艺—热处理]