激光熔覆铜基自生复合材料涂层及其耐磨性能

采用激光熔覆工艺 ,利用铜合金体系的熔体分离性质 ,在ZL10 4合金表面成功地制备出了LCC Cu自生复合材料涂层。LCC Cu复合材料的基体组织是呈枝晶或枝状胞晶的过饱和 (Cu ,Ni)固溶体 ,以由Laves相、金属间化合物或固溶体等亚组织所构成的球形颗粒为增强体 ,球形颗粒增强体的亚组织形态呈颗粒状和穗状。在空气中的干滑动摩擦磨损试验结果表明 ,LCC Cu复合材料的耐磨性能比QZ5合金铸铁的稍好 ,远远优于ZL10 4合金的

Laser Cladding Copper-base in-situ Composite Coating and its Wear Resistance

An insitu composite coating, coded as LCCu, was successfully fabricated on ZL104 Al alloy surface by laser cladding process on base of liquid separation characteristics of copper alloy systems. The matrix of the insitu composite LCCCu, was supersaturated (Cu, Ni) with dendritic or dendritecellular microstructure, and the spherical reinforced phases were composed of granular and fringy substructure containing laves phase, intermetals and solid solutes. The results of the dry sliding friction and wear test at ambient atmosphere showed that the wear resistance of the LCCCu composite is slightly better than that of QZ5 cast iron and far better than that of ZL104 Al alloy.