Laser repair remanufacture method of automobile engine crankshaft

Abstract

A laser repair remanufacture method of an automobile engine crankshaft relates to the technical fields of machine manufacture and material treatment, processing and application. First, laser cladding treatment is carried out on the damage zone of the crankshaft, and cladding is supplied in a manner of preset laser cladding. Then, the surface of the damage zone of the crankshaft is coated with an absorbing layer, and laser shock treatment is carried out on the damage zone of the crankshaft under the protection of a constrained layer. In the invention, the wear resistance, corrosion resistance and oxidation resistance of a metal surface are improved, the fatigue strength of materials is greatly improved, the service life of the materials is greatly prolonged, the fretting fatigue resistance of the crankshaft surface is effectively improved, the occurrence of fatigue cracks is inhibited, and the expansion rate of the fatigue cracks is reduced. Therefore, the treatment method greatly improves the wear resistance, corrosion resistance and fatigue strength of the materials, thereby prolonging the working life of the automobile engine crankshaft.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing and material processing, in particular to a laser repair and remanufacturing method for an automobile engine crankshaft. Background technique [0002] Laser cladding is a surface hardening processing technology, which uses a high-energy laser beam to melt the coating material, and forms a thin, low-dilution 50μm~2mm thick non-porous, crack-free, and base material. Materials combined with a good cladding layer. This process technology can be applied to large-area modification with individual tracks overlapping each other. Its unique features are its ability to clad a wide variety of alloy materials and its suitability for treating small areas. Laser cladding can significantly improve the surface properties of materials, expand its scope of application and extend its service life at a lower cost. [0003] In advanced manufacturing technology, laser shock processing technology, as...

AI Technical Summary

Problems solved by technology

This strengthening process can effectively improve the fatigue bending moment of the crankshaft and the wear resistance of the crankshaft journal, but the process is relatively complicated, and the deformation of the crankshaft after rolling is large, and the effect is not good, which affects the service life of the crankshaft

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