摘要
在Q345D钢表面氩弧熔覆TiN+石墨+Ni60,成功制备出Ti(CN)增强镍基复合涂层。利用扫描电镜(SEM)、能谱仪(EDS)及X射线衍射仪(XRD)对熔覆层的组织形貌、成分和相组成进行分析。通过硬度测定和磨损试验,对熔覆层的硬度和耐磨性进行了研究。试验结果表明,熔覆层中原位生成的Ti(CN)增强颗粒弥散分布在基体上;整个涂层组织均匀、无气孔、无裂纹,涂层与基体形成了良好的冶金结合;熔覆层表面显微硬度有了较大的提高;涂层的耐磨性提高了30多倍。
A metal matrix composite coating reinforced by Ti（CN） particulates has been successfully fabricated utilizing the in situ reaction of TiN,graphite and Ni60 pre-placed mixed powders on Q345D steel by gas tungsten arc welding（GTAW） cladding process.The microstructure of the coating was analyzed by SEM,EDS,XRD,meantime microhardness and wear resistance at room temperature of the cladding coating were examined by means of microhardness tester and wear tester,respectively.The results show that no crack and porosity composite coating with excellent metallurgical bonding between the coating and substrate can be obtained by GTAW cladding.The surface microhardness has greatly improved and the wear resistance is about 30 times of that of Q345D steel substrate.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第11期96-99,共4页
Heat Treatment of Metals
关键词
氩弧熔覆
熔覆层
碳氮化钛
耐磨性
gas tungsten arc cladding（GTAC）
clad layer
Ti（CN）
wear resistance
