作　　者： ; ; ; ;

机构地区： 华南理工大学

出　　处： 《腐蚀科学与防护技术》 2009年第1期52-54,共3页

摘　　要： 采用金相、扫描电镜、电化学工作站等分析手段研究了在普通离子氮化炉引入铬、镍离子源,对奥氏体不锈钢进行铬、镍、氮多元离子淹没轰击处理后材料的表面形貌、成分和耐蚀性能等。结果表明:经铬、镍、氮多元离子淹没轰击处理后的奥氏体不锈钢表面形成强化层,表面硬度Hv达到12.7 GPa;该强化层的铬、氮的含量很高,主要由CrN和Fe4N相组成;其耐腐蚀性能与普通离子氮化相比得到明显改善. Chromium and nickel ions were introduced into a conventional ion-nitriding furnace to realize a simultaneous multi-ionic bombardment on the surface of austenitic stainless steel AISI316. The microstruc- ture, composition and corrosion resistance of the samples prepared by different processing conditions were studied by means of optical microscopy, scanning electron microscope （SEM）and electrochemistry work- station. The results show that a hardening layer was formed on the surface of AIS1316 austenitic stainless steel after ionic bombardment. Vickers＇ hardness as high as 1270 Hv was obtained. The surface layer has a high content of chromium and nitrogen ,which form precipitates of CrN and Fe4N. The corrosion resist- ance of the bombarded austenitic stainless steel was greatly improved as compared with the conventional ion-nitriding ones.

关 键 词： 奥氏体不锈钢 离子氮化 轰击处理 耐蚀性

领　　域： [金属学及工艺] [金属学及工艺]