Copper-steel double-metal composite casting method for plunger pump rotor

Abstract

The invention discloses a copper-steel double-metal composite casting method for a plunger pump rotor and belongs to the technical field of double-metal casting. The method includes steps of machiningof a steel base body, pretreatment of the steel base body, performing of a heat treatment annealing technology on the steel base body, Ni-Cu-P multi-element nickel plating treatment of the inner surface of the steel base body, flux treatment, preheating of the steel base body, smelting of a lead tin bronze alloy, performing of a hot dipping technology, casting and machining, and the plunger pumprotor is prepared. The performance of the double-metal combined surface obtained in the casting manner reaches the standards, the equipment input is low, the technologies are simple and convenient tooperate, the workpiece cost is reduced, and the method is suitable for wide popularization and application and has the broad prospect. Compared with the powder metallurgy method, the method has the advantages as follows: the performance is more excellent, the heat treatment procedure is omitted, the time is saved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of bimetal casting, and in particular relates to a copper-steel bimetal composite casting method for a plunger pump rotor. Background technique [0002] Piston pump is a kind of transmission machinery widely used in production and an important device of hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. It is widely used in high pressure, large flow and flow adjustment occasions, such as hydraulic presses, engineering machinery and transportation machinery. The plunger and the rotor form a friction pair during work, and its quality determines the performance and life of the plunger pump. Production requires that the plunger pump tends to operate at hi...

AI Technical Summary

Problems solved by technology

Bimetallic composite casting materials, due to the synthesis of casting method, simple process and low cost, have great application prospects, but the contact time of the two metals during the casting process is short and the cooling speed is fast, which seriously affects the combination of the two. Become a bottleneck restricting the production and application of bimetallic composite casting materials