316奥氏体不锈钢渗N/镀CrN复合改性层组织与性能  

Microstructure and performance of 316 austenitic stainless steel modified compositely by means of ion nitriding/CrN coating

作　　者：李庆林[1] 赵尚 胡秋晨 胡巍巍 兰晔峰[1] LI Qing-lin;ZHAO Shang;HU Qiu-chen;HU Wei-wei;LAN Ye-feng(College of Materials Science and Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Forging Factory,Lanzhou Wanli Aviation Electromechanical Co.Ltd,Lanzhou 730030,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州万里航空机电有限责任公司锻造分厂,甘肃兰州730030

出　　处：《兰州理工大学学报》2020年第1期13-19,共7页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51561021)

摘　　要：分别在400、440、480℃下对316奥氏体不锈钢进行12 h的渗氮处理,再对渗氮后的试样进行物理气相沉积(PVD)镀CrN薄膜.采用扫描电镜(SEM)、光学显微镜(OM)、X射线衍射仪(XRD)、维氏显微硬度计和材料表面综合测试仪(HSR-2M)、电化学工作站等对复合改性层的表面形貌、截面形貌、成分、显微硬度、耐磨性以及耐蚀性进行测试.结果表明:400℃离子渗N/镀CrN试样耐磨性最差,耐蚀性最好;而480℃离子渗N/镀CrN试样耐磨性最好,耐蚀性最差;但比相同温度下单独渗氮试样的综合性能好.315 austenitic stainless steel was nitrided respectively at 400,440,and 480℃for 12 h,and then the physical vapour deposition(PVD)and CrN film coating were carried out for the nitrided samples.The surface morphology,cross-section morphology,composition,microhardness,wear resistance,and corrosion resistance of the compositely modifying layer were tested by means of scanning electron microscope(SEM),optical microscope(OM)and X-ray diffractometer(XRD),Vickers hardness tester,material surface tester(HSR-2M),and electrochemical workstation.The result showed that the sample with ion nitriding at 400℃/CrN film coating would exhibit the best corrosion resistance and the worst wear resistance;the sample with ion nitriding at 480℃/CrN film coating would have the worst corrosion resistance and the best wear resistance,but its performance would better than that of a sample nitrided only at the same temperature.

关 键 词：316奥氏体不锈钢 渗氮 物理气相沉积(PVD) CRN薄膜 

分 类 号：TG174.4[金属学及工艺—金属表面处理]