Copper-steel bimetallic valve plate and preparation method thereof

The invention provides a copper-steel bimetal valve plate and a preparation method thereof. The copper-steel bimetal valve plate comprises a copper base body, and a copper alloy layer is arranged on the surface of the steel base body in a laser cladding mode. The copper alloy layer is composed of, by mass, 10%-15% of Pb, 7%-10% of Sn, 3%-5% of Bi and the balance Cu. A small amount of Bi is added into the copper alloy powder, so that the copper alloy layer has the characteristics of good seizure resistance and strong compliance, and meanwhile, Cu and Pb also have antifriction performance, so that the antifriction performance of the oil distribution disc is improved. And meanwhile, laser cladding is adopted, grains on the surface of the material are obviously thinned, the hardness is high, and the wear resistance and bonding strength of the oil distribution disc are greatly improved. 本发明提供了一种铜钢双金属配流盘及其制备方法，铜钢双金属配流盘包括铜基体，在钢基体表面激光熔覆有铜合金层。所述铜合金层是由以下组份按质量百分比组成：Pb：10～15％，Sn：7～10％，Bi：3～5％，Cu为余量。铜合金粉末中加入了少量的Bi，使得铜合金层具