等离子体弧源奥氏体不锈钢低温离子渗扩氮研究  

Low Voltage Plasma arc Source Nitriding of Stainless Steel

作　　者：王亮[1] 许晓磊[1] 于志伟[1] 许彬[1] 黑祖昆[1] 

机构地区：[1]大连海事大学,116024

出　　处：《表面技术》1999年第6期17-19,共3页Surface Technology

摘　　要：采用低压等离子体弧源离子渗扩氮技术,在350～450℃之间对奥氏体不锈钢进行表面强化,可在表面形成2～15μm厚的含氮奥氏体过饱和层,即“γ_N”相。最大含氮量可达到40％(原子数分数)以上。显微硬度可达到HV_(0.1)1200以上,具有良好的抗蚀性,耐磨性。本工艺具有表面氮浓度高,渗速快,工件表面无弧光放电,表面光洁度好的特点。The study of the nitriding of 18~8 stainless steel by a low voltage plasma arc source at the temperature 350~ 480℃ and the pressure 2×10-1Pa. The nitrided layers were examined with optical microscopy.X-ray diffraction, AES and XPS. The highest amount of nitrogen in interstitial solid solution approaches 45at%. The hardness of nex- panded f. c. c. phase with the thickness about 13um is Hv0.1 1200. There is a critical temperature for the formation of 'γ'phase.

关 键 词：低压 等离子弧源 渗氮 不锈钢 低温 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TG174.445[金属学及工艺—金属学]