Method for manufacturing high-strength wear-resistant bearing

By quenching and tempering low-carbon alloy steel and controlling the medium composite microstructure treatment, a composite microstructure of S+C+Fe2N+Fe3N+Fe4N is formed, which solves the problems of uneven bearing hardness and poor wear resistance, and improves the service life and wear resistance of bearings.

WO2026065761A1 Publication Date: 2026-04-02YANTAI DONGXING GRP CO LTD
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Patent Information

Application Number
PCT/CN2024/137975
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-09-30
Filing Date
2024-12-10
Publication Date
2026-04-02

AI Technical Summary

Technical Problem

Existing heat treatment processes result in uneven hardness of the bearing matrix, low surface hardness, poor wear resistance, and reduced service life.

Method used

Using low-carbon alloy steel as raw material, after quenching and tempering, combined with controlled medium composite microstructure treatment, including gaseous and liquid media treatment, a composite microstructure of S+C+Fe2N+Fe3N+Fe4N is formed, with gradient distribution to improve core strength and surface hardness.

Benefits of technology

It achieves a bearing service life of 500 hours under low-speed heavy-load conditions, and the friction coefficient is less than 0.05 throughout the entire life cycle, reducing the frequency of bushing replacement and extending the service life of bearings and mating components.

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Abstract

The present invention relates to the field of alloy steel materials, and in particular to a method for manufacturing a high-strength wear-resistant bearing. By incorporating a controllable medium composite structure treatment step into a process, and using metal material modification technology in a controllable medium environment, a composite structure is formed in a product matrix; the composite structure, by means of a gradient distribution, enables the product to achieve high core strength and impact resistance and high surface hardness and wear resistance, so that a service life of 500 hours under low-speed heavy-load service conditions and a friction coefficient of 0.05 or below throughout the entire life cycle are achieved; the service life of 500 hours under the service conditions greatly reduces bushing replacement frequency and device production downtime losses, and the friction coefficient of 0.05 or below throughout the entire life cycle greatly reduces the wear on a friction pair mating with a shaft hole, mitigating sliding friction, achieving the objective of prolonging the service life of both a bushing and a shaft mating with the bushing.
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