奥氏体不锈钢的低温离子软氮化处理  

Plasma Nitrocarburising of Austenitic Stainless Steel at Low Temperature

作　　者：赵程[1] 孙定国[1] 

机构地区：[1]青岛科技大学等离子体表面技术研究所,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2004年第3期238-241,共4页Journal of Qingdao University of Science and Technology:Natural Science Edition

摘　　要：利用低压等离子体辉光放电技术对AISI 31 6奥氏体不锈钢进行低温离子软氮化硬化处理。处理后的奥氏体不锈钢属于一种无氮化铬或碳化铬析出的氮和碳的过饱和固溶体 (S相结构 )。这种渗入钢中的过饱和氮和碳元素引起奥氏体晶格发生畸变 ,使渗层的硬度和耐磨性都有较大幅度的提高。由于处理后的奥氏体不锈钢渗层内的最大含氮量和最大含碳量分别出现在不同的深度 ,既有离子渗氮处理的高硬度 。Surface hardening of AISI 316 austenitic stainless steel without degradation of corrosion resistance was carried out using plasma nitrocarburising process at low temperature. It was found that the supersaturation of the alloying elements (N and C) in the austenitic lattice and the precipitation-free layer on austenitic stainless steel (i.e. the S phase) could enhance the layer hardness and wear resistance. The GDS analysis results show that the maximum N and C content in the layer were in the different depth. The plasma nitrocarburising layers have not only high hardness as that of plasma nitriding, but also gradual hard profile and high thickness as that of plasma carburising.

关 键 词：奥氏体不锈钢 离子氮碳化处理 S相 

分 类 号：TG156.82[金属学及工艺—热处理]