CAJ | 학술논문

采用激光熔覆技术在45钢样品表面制备了Ni/TiC复合涂层，利用光学显微镜、SEM，EDS，XRD、显微镜硬度计及摩擦磨损试验机等检测设备研究了Ni/TiC复合涂层的组织和性能。试验结果表明：Ni/TiC复合涂层没有出现裂纹、孔洞等缺陷，涂层与基体之间具有良好的冶金结合，涂层显微硬度沿层深皆呈明显的阶梯状分布，最外表面的熔覆层硬度最高，约为800 HV；熔覆试样的比磨损率比基体试样的比磨损率下降了86.5％，表明Ni/TiC复合涂层具有较好的耐磨性能。
채용격광용복기술재45강양품표면제비료Ni/TiC복합도층，이용광학현미경、SEM，EDS，XRD、현미경경도계급마찰마손시험궤등검측설비연구료Ni/TiC복합도층적조직화성능。시험결과표명：Ni/TiC복합도층몰유출현렬문、공동등결함，도층여기체지간구유량호적야금결합，도층현미경도연층심개정명현적계제상분포，최외표면적용복층경도최고，약위800 HV；용복시양적비마손솔비기체시양적비마손솔하강료86.5％，표명Ni/TiC복합도층구유교호적내마성능。
Ni/TiCcomposite coating is prepared on the 45 steel substrates by laser cladding. Microstructure and wear properties of composite coatings are investigated by optical microscopy,SEM,EDS,XRD,Vickers microhardness tester and wear machine. The results show that defects, such as cracks and pores, do not occur in the Ni/TiCcomposite coating and 45 steel substrate, and the good metal urgical bonding appears between them. Microhardness of Ni/TiC composite coating along the layer depth presents an evident stepladder distribution with the highest hardness( approx 800 HV) of the externalmost surface of the coatings. The wear rate (86.5%)of the laser clad composite coating is reduced. The result of wear experiment shows that Ni/TiCcomposite coating processes good wear resistance.