A surface strengthening method suitable for low-temperature steel friction pairs of complex configuration polar ships

By preparing a multi-layer composite structure consisting of a nano-hardened layer, an alloy layer, and a self-lubricating layer on the surface of low-temperature steel friction pairs in polar vessels, the problems of insufficient wear resistance and dead angle reinforcement in complex-shaped friction pairs are solved, achieving a surface strengthening effect without dead angles and improving the wear resistance and service life of the friction pairs.

CN116926519BActive Publication Date: 2026-02-10HARBIN ENG UNIV
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Patent Information

Application Number
CN202310887590.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-19
Publication Date
2026-02-10
Estimated Expiration
2043-07-19

AI Technical Summary

Technical Problem

Existing technologies make it difficult to comprehensively strengthen complex low-temperature steel friction pairs in polar vessels, resulting in insufficient wear resistance and problems with reinforcement dead zones.

Method used

By employing supersonic particle bombardment technology combined with electroplating and chemical plating techniques, a multi-layer composite structure consisting of a nano-hardened layer, an alloy layer, and a self-lubricating layer is prepared on the surface of the friction pair. Through multiple treatments, a multi-layer coating is formed, achieving reinforcement without dead angles.

Benefits of technology

It improves the wear resistance and hardness of the friction pair surface, extends service life, and reduces friction loss, making it suitable for cryogenic steel friction pairs in polar ships with complex configurations.

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Abstract

The application discloses a surface strengthening method suitable for low-temperature steel friction pairs of polar ship with complex configuration, and aims at solving the problems of insufficient surface wear resistance of the friction pairs and difficulty in surface strengthening in the existing polar ship with complex configuration.The surface strengthening method of the low-temperature steel friction pairs comprises the following steps: firstly, polishing and ultrasonic cleaning are conducted on the low-temperature steel friction pair materials; secondly, nano-diamond particle powder and spherical hard ceramic particles are mixed by ball milling; thirdly, a nickel-based plating solution is prepared; fourthly, supersonic particle bombardment treatment is conducted on the surface of the clean friction pair materials; fifthly, a nickel-based plating layer is prepared by adopting a chemical plating or brush plating process; sixthly, the step four and the step five are repeated for multiple times; seventhly, a composite plating solution is prepared; and eighthly, a self-lubricating coating is prepared.The application prepares a multilayer composite structure coating comprising a hardening layer, an alloy layer and a self-lubricating layer, the coating has good combination performance, high hardness and wear resistance, and is suitable for the low-temperature steel friction pairs of the polar ship with complex configuration.
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