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以Al粉、Ti粉和C粉为原料,利用氩弧熔敷技术,在ZL104合金表面原位合成了TiC增强Al基复合材料层,借助扫描电镜、X射线衍射仪对复合涂层的组织进行了分析;利用显微硬度计、摩擦磨损试验机对复合涂层性能进行了测试。结果表明,氩弧熔敷过程中可以充分反应合成TiC颗粒;TiC颗粒呈球状分布,颗粒尺寸约为1.5μm,均弥散分布于熔敷层中。熔敷层与基体呈冶金结合,无裂纹、气孔等缺陷;复合涂层的显微硬度可达660 HV0.2,涂层耐磨性较基体提高近7倍。
Using Al powder, Ti powder and C powder as raw materials, the TiC reinforced Al matrix composite layer was synthesized in-situ on the surface of ZL104 alloy by argon arc welding technique. The microstructure of the composite coating was characterized by scanning electron microscopy and X-ray diffractometer The analysis; the use of micro-hardness tester, friction and wear testing machine composite coating performance was tested. The results show that the TiC particles can be fully reacted during argon arc welding. The TiC particles are spherically distributed with a particle size of about 1.5 μm, which are dispersed in the deposited layer. The cladding layer is metallurgically bonded with the substrate, and has no defects such as cracks and pores. The micro-hardness of the composite coating can reach 660 HV0.2, and the abrasion resistance of the coating layer increases by nearly seven times compared with that of the substrate.