碳含量对AISI304奥氏体不锈钢离子碳氮共渗性能的影响  

Effect of C_2H_2 content of performance of AISI304 austenitic stainless steel after ionic carbonitriding process

作　　者：张以忱[1] 郭元元[1] 马胜歌 耿漫 

机构地区：[1]东北大学,辽宁沈阳110004 [2]深圳863计划材料表面工程技术研发中心,广东深圳518029

出　　处：《真空》2008年第3期28-30,共3页Vacuum

摘　　要：对AISI304奥氏体不锈钢进行了不同C2H2含量下的离子碳氮共渗,利用金相显微镜、辉光放电光谱仪、X射线衍射仪和显微硬度计测试了经碳氮共渗处理后试样改性层的截面形貌、渗层成分、相组成和力学性能。结果表明:低温下离子碳氮共渗可以同时获得性能好的Cγ相和γN相,且最大含量分别出现在不同深度;气氛中C2H2含量为3%时,渗层厚度最大,表面显微硬度最大。The AISI304 austenitic stainless steel with different C2H2 contents was ionically carbonitrided. Then, the sectional morphology, composition of carbonitrided layer, phase composition and mechanical proerties of the steel specimens after ionic carhonitriding were tested with metalloscopy, GDS （glow discharge spectroscopy）, XRD and microhardness tester. The results showed that the ionic carbonitriding process can offer high-quality γc and γs phases simultaneously at low temperature and that the maximum C2H2 content is found at different depths of carhurized and nitrided layers. The maximum thickness of carbonitrided layer and surface microhardness are found when the C2H2 content is 3% of carbonitriding atmosphere.

关 键 词：离子碳氮共渗 奥氏体不锈钢 C2H2含量 

分 类 号：TG156.82[金属学及工艺—热处理]