矿用双金属复合轴套烧结工艺及其性能研究

Sintering Procedure and Properties of Mining Used Bimetal Shaft Sleeve

以45钢为基体、烧结6 6 3铜合金为轴套耐磨层,研究了双金属结合状态及影响双金属结合强度、铜合金层物理、力学性能的工艺因素。结果表明,采用400MPa压力压制不规则形状的6 3 3铜合金粉制作耐磨层,不仅有利于烧结后获得均匀组织,且与45钢基体有较高的结合强度,最高抗剪切强度达到95MPa。采用800MPa压力进行复压处理,可获得最好的耐磨损性能。

The wear lay of 6-6-3 copper alloy is fabricated on the 45 steel matrix by sintering technology. The connection of the bimetal, the technology affecting the connecting strength of the bimetal and the mechanical properties of the copper alloy wear lay are investigated. The result manifests that when the shape-irregular 6-6-3 copper alloy powder is formed under 400MPa, the sintered wear lay with uniform microstructure could be obtained which is well bonded to the 45 steel matrix with the shear strength of the bimetal is up to 95MPa and if the bimetal is reformed under 800MPa before sintering, the wear resistance of the sintered wear lay will reach the ceiling.