WC添加对电弧熔覆钛基涂层微观组织及性能的影响  

Effect of WC Addition on Microstructure and Properties of Arc Cladding Titanium-based Coatings

作　　者：薛添淇 张敏[1] 闫少帅 程龙 马克 周文坤 毛威 XUE Tianqi;ZHANG Min;YAN Shaoshuai;CHENG Long;MA Ke;ZHOU Wenkun;MAO Wei(School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《电焊机》2024年第11期66-74,119,共10页Electric Welding Machine

基　　金：陕西省重点研发项目(2023KXJ-234);西安市科技计划项目(23KGDW0004-2022);陕西省重点研发计划项目(2023-YBGY-470)。

摘　　要：为了提高钛合金的使用寿命,设计了一种Ti-WC系药芯焊丝,并通过TIG电弧熔覆技术在TC4钛板上制备了4种不同WC含量的钛基涂层。通过XRD、SEM、EDS、显微硬度测试、摩擦磨损试验和电化学测试等方法,对涂层的微观组织、力学性能和耐蚀性进行了分析。结果表明,涂层主要由α-Ti、WC、W2C和Ti C组成,随着WC含量的增加,涂层中硬质相的含量也随之增加,涂层硬度及耐磨性得到了显著提高。在电化学耐蚀性测试中,各涂层均在电解液中发生了明显的钝化现象,耐蚀性随着WC含量的增加呈现先上升后下降的趋势,当WC添加量为12%时耐蚀性最佳。In order to improve the service life of titanium alloy,a kind of Ti-WC core welding wire is designed in this paper.The four kinds of coatings with different WC content are prepared on TC4 titanium plate by TIG arc cladding technology.The microstructure,mechanical properties and corrosion resistance of the coatings were analyzed by XRD,SEM,EDS,microhardness test,friction and wear test and electrochemical test.The results show that the coating is mainly composed of α-Ti,WC,W2C and TiC.With the increase of WC content,the content of hard phase in the coating also increases,and the hardness and wear resistance of the coating are significantly improved.In the electrochemical corrosion resistance test,each coating has obvious passivation phenomenon in the electrolyte,and the corrosion resistance first increased and then decreased with the increase of WC content.When the WC addition amount was 12%,the corrosion resistance was the best.reasing with the increase of WC,and the corrosion resistance was the best when the amount of WC was 12%.

关 键 词：电弧熔覆 药芯焊丝 钛基涂层 WC硬质相 耐磨性 

分 类 号：TG422[金属学及工艺—焊接]