Copper and brass nut by centrifugal casting,its process is to pour the molten metal into a hollow cylindrical mold that rotates at a certain speed over a horizontal or vertical axis. The centrifugal force divides molten metal and forms it into the tubular / cylindrical. This casting method involves high forces means less dense material including impurities are forced into the center, where they can be removed, and the gas related defects and the shrinkage porosity are reduced, so the parts by centrifugal casting show more intensive, more fine-grained structure and physical properties such as tensile strength, yield strength, elongation and uniformity.
Copper alloy cast brass nut casting is widely used in hydraulic machinery.From the view point of metallurgic, many copper alloys are single-phase solid solutions,wherein the alloy elements such as zinc, tin and nickel are replaced by copper in the copper matrix. An example of casting a single-phase solution alloy is red brass including up to 6% zinc and 2% tin, copper, nickel,that includes up to 10% nickel, and tin-bronze includes up to 8% tin and 4% zinc.
With the increase of alloy content, the second phase may be formed. In the case of brass, when the zinc content increases, a hard second phase is formed with the copper rich matrix. Besides that,this stage will damage room temperature ductility, but will increase high temperature ductility.
1. low friction coefficient, high corrosion resistance, anti biological pollution, high resistance to sea water
2. high density, less defects, such as pores and slag, good mechanical properties. Easy to manufacture cylinder or sleeve type composite metal castings, such as steel backed copper sleeve, bimetallic roller, thin wall casting.