Method for preparing anti-wear hydraulic pump part

Abstract

The invention belongs to the technical field of hydraulic pump manufacturing, and particularly relates to a method for preparing an anti-wear hydraulic pump part. After hydraulic pump part base material is subjected to quenching, high-temperature tempering and rough and finish machining, an ion plating method is adopted for carburizing treatment, and a HfCrWSiC multielement complex carbide coatingon the surface is deposited through an ion plating and magnetron sputtering combined method. According to the method for preparing the anti-wear hydraulic pump part, the HfCrWSiC carbide coating, a physical vapor deposition method and the carburizing technology are combined, physical performance differences between the HfCrWSiC multielement complex carbide coating and the hydraulic pump part base material can be relieved, the surface hardness and supporting function of the base material can be improved, and high surface hardness and core toughness are achieved. According to the method, the adhesion performance of the coating and the base material can be enhanced by 100% or above, the surface hardness can be improved by two times or more, the surface treatment time can be shortened by 90%or above, the service life of a hydraulic pump can be prolonged by one time or more, and the maintenance cost of the hydraulic pump can be reduced by 70% or above.

Description

technical field [0001] The invention belongs to the technical field of hydraulic pump manufacturing, and in particular relates to a preparation method of anti-wear hydraulic pump parts. Background technique [0002] The hydraulic pump is the power component of the hydraulic transmission system. Its function is to convert the mechanical energy of the power machine (such as the motor and internal combustion engine) into the hydraulic energy of the oil, and provide power for the entire hydraulic system. With the rapid development of industrial technology, hydraulic pumps are gradually developing towards high pressure, high speed and large flow. Since the hydraulic pump is subjected to high and concentrated alternating loads while operating at high speed, the wear of parts in the pump is the main damage form of domestic hydraulic pumps, especially high-pressure hydraulic pumps. Therefore, improving the performance of hydraulic pump parts materials is a development One of the ke...

AI Technical Summary

Problems solved by technology

However, if the PVD carbide coating is prepared directly on the surface of the hydraulic pump parts, due to the large difference between the substrate hardness, elastic modulus, thermal expansion coefficient and the coating material, it is impossible to obtain a PVD coating with high bonding force, making PVD coating Premature shedding and failure of layers

Chinese patent CN101058870A adopts a single PVD coating on the surface of the mold. The poor bonding force between the coating and the substrate and the poor mechanical matching between the PVD coating and the substrate are important factors that limit the advantages of PVD coatings such as high hardness and low friction coefficient.

Chinese patent CN103727180A directly prepares wear-resistant ceramic coatings and diamond coatings on the surface of carbon steel. Due to the soft hardness of the substrate, which cannot support the coating and the obvious performance difference between the substrate and the coating, the performance of the prepared coating cannot meet the requirements. Many practical requirements, especially under the conditions of high speed, heavy load and alternating load, the coating will fall off and wear quickly

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