【摘要】 采用水冷钢模激光合金熔炼炉制备了以初生W树枝晶为增强相、以W₂Ni₃Si三元金属硅化物为基体的金属硅化物“原位”耐磨复合材料,分别在室温干滑动磨损及600℃高温滑动磨损条件下测试了上述W/W₂Ni₃Si金属硅化物“原位”增强耐磨复合材料的耐磨性,并讨论了其磨损机理,结果表明,上述金属硅化物耐磨复合材料在室温干滑动磨损和高温滑动磨损条件下均具有优异的耐磨性能。更多还原

【Abstract】 Tungsten reinforced W2Ni3Si matrix in situ composites consisting of primary tungsten dendrites and the interdendritic W2Ni3Si ternary metal silicide were fabricated by the LasmeltTM process using a newly patented laser melting furnace. Microstructure of the laser melted W/W2Ni3Si composites was characterized by OM, SEM, XRD and EDS. Room and high temperature wear properties were evaluated under metallic sliding wear test conditions and the wear mechanism was discussed. Because of the unique combination of high strength and ductility of the tungsten reinforcing phase and the high hardness and strong intermetallic atomic bonds of the ternary metal silicide W2Ni3Si matrix, the W/W2Ni3Si in situ composites have excellent wear resistance under both room and high temperature sliding wear test conditions.更多还原