摘要
以Ti粉、C粉、WC和Ni60A粉末为原料,利用氩弧熔覆技术在Q235钢基材表面成功制备出Ni基增强相复合涂层,应用OM,SEM,XRD对复合涂层的显微组织和物相进行了分析.结果表明,复合涂层物相由TiC和(Ti,W)C颗粒,γ-Ni奥氏体枝晶和枝晶间的M23C6共晶组织组成,TiC颗粒相细小弥散的分布在基体上,颗粒尺寸大约1.5μm.显微硬度和耐磨性测试结果表明,涂层的显微硬度较基体Q235钢提高4倍以上;常温干滑动磨损条件下,复合涂层具有优异的耐磨性.
Ni-based composite coating reinforced with the pre-alloyed powder of Ni60A,WC,Ti and C was prepared on the surface of Q235 steel by means of argon arc cladding technique.The microstructure was investigated by using optical microscope,scanning electron microscope and X-ray diffraction.The results show that the main phases of coating are TiC,(Ti,W)C,γ-Ni dendrite structure and M23C6 eutectic structure.The grain of TiC is fine,which size is about 1.5 μm,and distributes uniformly.The test results of micro-hardness and wear resistance show that the micro-hardness is improved about 4 times compared with that of the Q235 steel.The argon arc cladding composite coating has high hardness and excellent wear resistance under dry sliding wear test conditions.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2010年第10期47-49,共3页
Transactions of The China Welding Institution
基金
黑龙江省教育厅科学技术研究项目(11551419)
黑龙江科技学院引进人才项目(07-57)
关键词
氩弧熔覆
复合涂层
原位合成
耐磨性
argon arc cladding
composite coating
micro-hardness
wear resistance
