ZTA15钛合金表面热喷涂WC-12Co涂层的组织及性能  

Structure and Properties of WC-12Co Coating by HVOF on ZTA15 Alloy

作　　者：金国栋 游涛 柴能 徐卫龙 李巍 姚谦 刘时兵 王洪锋 JIN Guo-dong;YOU Tao;CHAI Neng;XU Wei-long;LI Wei;YAO Qian;LIU Shi-bing;WANG Hong-feng(Military Representative Bureau in Shenyang,Navy Equipment Department,Qiqihar 161000,Heilongjiang,China;Shenyang Research Institute of Foundry Co.,Ltd.,State Key Laboratory of Light Alloy Foundry Technology for High-End Equipment,Shenyang 110022,Liaoning,China)

机构地区：[1]海装沈阳局,黑龙江齐齐哈尔161000 [2]沈阳铸造研究所有限公司,高端装备轻合金铸造技术国家重点实验室,辽宁沈阳110022

出　　处：《铸造》2021年第4期486-492,共7页Foundry

基　　金：辽宁省科学技术计划指导计划;(2019JH8/10100006);辽宁省科技计划(2019010008-JH8/101);辽宁省“兴辽英才计划”(XLYC1808030)。

摘　　要：采用超音速火焰喷涂(HVOF)技术在ZTA15钛合金表面喷涂WC-12Co粉末,可以得到较为致密的WC硬质涂层。通过XRD分析发现,涂层内主要相为WC,并伴随少量的W_(2)C和Co_(3)W_(3)C,未发现Co相的存在。涂层与基体之间不存在过渡区,涂层内的组织之间为冶金结合,涂层与基体之间为物理结合,并且涂层与基体之间的结合强度略高于涂层组织自身强度。涂层的显微硬度可达到HV11045,是ZTA15钛合金显微硬度值的3倍。涂层材料断口具有脆性断口特征,涂层材料的强度和塑性均低于钛合金基体。A dense coating with WC phase was formed by HVOF technique and spraying WC-12Co powder on the surface of ZTA15 alloy.The XRD analysis shows that WC is the main phase in the coating,with a small amount of W_(2)C and Co_(3)W_(3)C,and no Co phase is found.There is no transition zone between the coating and the substrate,the microstructure in the coating is metallurgical bonding,but the coating and the substrate are physical bonding,and the bonding strength between coating and substrate is slightly higher than that of coating.The microhardness of coating can reach HV11045,which is 3 times higher than that of ZTA15 alloy.The fracture of coating material is characterized by brittle fracture,and the strength and plasticity of coating material is lower than that of titanium alloy substrate.

关 键 词：ZTA15 热喷涂 WC-12CO 

分 类 号：TG174[金属学及工艺—金属表面处理]