Re-manufacturing method of engineering machinery axle and coating of engineering machinery axle

Abstract

The invention provides a re-manufacturing method of an engineering machinery axle and a coating of the engineering machinery axle. The re-manufacturing method comprises the following steps of: a, determining the rest service life of the waste axle by nondestructive testing; b, pre-treating the surface of the axle having enough rest service life for use; c, carrying out thermal spraying process, preparing a Fe-based amorphous alloy coating with excellent corrosion resistance by adopting a plasma spray technology or preparing a WC-Co wear-resisting layer by adopting a supersonic flame-spraying technology; and d, carrying out successive fine process, so that the size precision of the remanufactured part can reach the design requirements. The Fe-based coating comprises the following components: 1-3% of Mo, 5-7% of Cr, 1-3% of Ni, 9-11% of P, 2-4% of Si and the balance of Fe; the particle size of the powder is 400-160 meshed; and the WC-Co coating uses the thermal spray powder as spray material, wherein the particle size of the powder is 15-45 mum, WC particles are coated by metal Co, and the particle size of a WC hard particle is 0.1-10 mum. The method and coating provided by the invention are good in properties, the wear-resisting and anticorrosion properties of the remanufactured part tends to be superior to those of the original product, and the method can be used for technically updating the engineering machinery axle parts at the expiration of the term of service.

Description

technical field [0001] The invention provides a method for remanufacturing an engineering machinery axle and its coating, which belongs to the technical field of engineering machinery remanufacturing, and is suitable for repairing, remanufacturing and technical upgrading of shaft parts such as failed engineering machinery sprocket shafts. Background technique [0002] With the rapid development of modern industry, the upgrading of products has brought about a large number of scrapping of mechanical and electrical products, and the same is true for the construction machinery industry. The production practice of construction machinery shows that the main failure mode of its parts is the failure of the surface wear of the parts. [0003] At present, many well-known foreign construction machinery manufacturing enterprises, such as Caterpillar and Komatsu, have developed the remanufacturing industry for 20 to 30 years, and the remanufacturing industry is one of the main sectors o...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the current remanufacturing technology with engine remanufacturing as the main application object cannot meet the technical requirements of remanufacturing shaft parts of construction machinery, the present invention provides a remanufacturing method and coating suitable for shaft parts of construction machinery, Its purpose is to select and determine the remaining life of axle parts that are mainly worn on the surface and have no damage or less damage inside the matrix through non-destructive testing methods, and use thermal spraying technology to restore their performance and even improve wear resistance. performance and corrosion resistance

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