Method for forging steel bimetallic fracture splitting connecting rod

Abstract

The invention provides a method for forging a steel bimetallic fracture splitting connecting rod. The method comprises the following steps that S1, a casting blank of the steel bimetallic fracture splitting connecting rod is prepared through a casting process, and the casting blank is composed of a connecting rod body, a fracture splitting area and a connecting rod cover; S2, the casting blank is subjected to normalizing treatment and used for removing network cementite in a fracture splitting material and an interface area, and a bimetallic interface is promoted to form a continuous diffusion layer; S3, the casting blank is forged, and the flowing direction of the fracture splitting material is controlled through a forging die; S4, burrs on the surface of a forged part are cleared away, and shot blasting treatment is carried out; S5, the forged part is subjected to thermal refining, the mechanical performance of the connecting rod meets requirements, and the fracture splitting brittleness of the fracture splitting material is guaranteed; and S6, a fracture splitting groove is formed, fracture splitting and reassembly are carried out, and finally the finished steel bimetallic fracture splitting connecting rod is obtained. The limit of the fracture splitting connecting rod on the material can be broken through, and the problem that alloy steel cannot be used for producing and manufacturing the fracture splitting connecting rod is solved.

Description

technical field [0001] The invention belongs to the field of forging research of transmission power component materials, and in particular relates to a forging method of a steel bimetal cracking connecting rod. Background technique [0002] The connecting rod, as a key component for power transmission inside the engine, not only bears the air pressure generated by the combustion chamber, but also needs to bear the constantly changing load, which requires the connecting rod to have high strength, high hardness, and good comprehensive mechanical properties. The traditional connecting rod manufacturing is first through integral forging, then sawing, milling, and grinding the main body of the connecting rod and the end face of the connecting rod cover, and finally process the bolt holes on the connecting rod body and the connecting rod cover, and realize the combination of the two through connecting bolts. Pack. The processing technology of the traditional connecting rod is too...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a forging method for steel bimetal cracking connecting rods in view of the above problems, which can solve the problem that ordinary medium carbon steel and medium carbon alloy steel cannot be used for the production and manufacture of cracking connecting rods

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