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
陈乐 1洪晓峰 1魏光强 1丁睿智 2古博 2宁方强2
作者信息
- 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
- 折叠
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 kΩcm2)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 kΩcm2),而其钝化电流密度(10-7-10-6 A/cm2)小于SUS630不锈钢基体的钝化电流密度(10-6-10-5 A/cm2),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.
Abstract
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 kΩcm2)of the Stellite 6 coating were higher than that of SUS630 SS(-0.35 V and 129 kΩcm2),while the passivation current density(10-7-10-6 A/cm2)of Stellite 6 coating was lower than that(10-6-10-5 A/cm2)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Key words
laser cladding/SUS630 stainless steel/Stellite 6 alloy/wear resistance/corrosion resistance引用本文复制引用
基金项目
国家自然科学基金(52301093)
山东省自然科学基金(ZR2023QE268)
出版年
2024
NETL
NSTL
万方数据