激光熔覆Stellite 6合金涂层的耐磨耐蚀性能研究  

Study on wear and corrosion resistance of Stellite 6 alloy coating prepared by laser cladding

作　　者：陈乐[1] 洪晓峰[1] 魏光强[1] 丁睿智 古博 宁方强 CHEN Le;HONG Xiaofeng;WEI Guangqiang;DING Ruizhi;GU Bo;NING Fangqiang(Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu 610213,China;School of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao Shandong 266590,China)

机构地区：[1]中国核动力研究设计院反应堆燃料及材料重点实验室,成都610213 [2]山东科技大学材料科学与工程学院,山东青岛266590

出　　处：《激光杂志》2024年第6期210-214,共5页Laser Journal

基　　金：国家自然科学基金(No.52301093);山东省自然科学基金(No.ZR2023QE268)。

摘　　要：为提高阀杆用SUS630不锈钢的耐磨耐蚀性能,利用激光熔覆技术在其表面制备Stellite 6钴基合金涂层,随后对比研究了Stellite 6合金涂层和SUS630不锈钢基体的显微硬度、摩擦磨损性能和腐蚀性能。结果表明:相对于SUS630不锈钢,Stellite 6合金涂层的硬度提高了25%,磨损体积减少了50%,说明Stellite 6合金涂层的耐磨性能优于SUS630不锈钢基体;此外,在3.5%NaCl溶液中,Stellite 6合金涂层的腐蚀电位(-0.18 V)和钝化膜的阻抗值(367 kΩcm^(2))均高于SUS630不锈钢基体的腐蚀电位(-0.35 V)和钝化膜的阻抗值(129 kΩcm^(2)),而其钝化电流密度(10^(-7)-10^(-6)A/cm^(2))小于SUS630不锈钢基体的钝化电流密度(10^(-6)-10^(-5)A/cm^(2)),说明Stellite 6合金涂层的耐腐蚀性能优于SUS630不锈钢基体。因此,激光熔覆Stellite 6合金涂层可提高SUS630不锈钢的耐磨耐蚀性能。In order to improve the wear and corrosion resistance of SUS630 stainless steel(SS)used as valve stem,Stellite 6 cobalt-based alloy coating was prepared on its surface by laser cladding technology.The microhard-ness,wear and corrosion properties of Stellite 6 coating and SUS630 SS were studied.The results show that compared with SUS630 SS,the hardness of Stellite 6 coating increases by 25%and the wear volume decreases by 50%,indica-ting that Stellite 6 coating has better wear resistance than SUS630 SS.In addition,in 3.5%NaCl solution,the corro-sion potential(-0.18 V)and the impedance value of the passive film(367 kΩcm^(2))of the Stellite 6 coating were higher than that of SUS630 SS(-0.35 V and 129 kΩcm^(2)),while the passivation current density(10^(-7)-10^(-6) A/cm^(2))of Stellite 6 coating was lower than that(10^(-6)-10^(-5) A/cm^(2))of SUS630 SS,indicating that Stellite 6 coating has better corrosion resistanc than SUS630 SS.Therefore,laser cladding Stellite 6 coating can improve the wear and corrosion re-sistance of SUS630 SS.

关 键 词：激光熔覆 SUS630不锈钢 Stellite 6合金 耐磨性能 耐蚀性能 

分 类 号：TN272[电子电信—物理电子学]