Exhaust seal ring heat treatment processing method

By subjecting the exhaust sealing ring to pre-aging annealing heat treatment at 520℃ for 2 hours and standard aging treatment, combined with pretreatment, inlaying, grinding, polishing and etching, the problem of traditional heat treatment processes failing to achieve a strict seal is solved, and the hardness and lifespan of the sealing ring are improved.

CN117625932BActive Publication Date: 2026-07-21STATE-OWNED CHANGJIANG POWER MASCH FACTORY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE-OWNED CHANGJIANG POWER MASCH FACTORY
Filing Date
2023-12-04
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing sealing devices using traditional heat treatment processes cannot achieve a strict sealing effect, resulting in short lifespan and poor sealing performance of exhaust seals in high-pressure environments, and easy leakage under complex environments and loads.

Method used

The exhaust sealing ring was pretreated, inlaid, ground, polished and etched by a pre-aging annealing heat treatment at 520℃ for 2 hours combined with standard aging treatment. The surface was etched using a CuCl2 etchant solution, and the hardness and grain size were measured.

Benefits of technology

The internal structure of the sealing ring was improved, the formation of the reinforcing phase was promoted, the hardness and strength of the material were increased, and the service life of the exhaust sealing ring was extended.

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Abstract

The application provides a heat treatment processing method for an exhaust sealing ring, and relates to the field of heat treatment processes.The method comprises the following steps: after the exhaust sealing ring is pretreated through sandpaper polishing and ultrasonic cleaning, the exhaust sealing ring is subjected to a 520 DEG C, 2h aging preannealing heat treatment, and then subjected to a standard aging heat treatment; a sample of the exhaust sealing ring after the heat treatment is cut, and the sample is subjected to ultrasonic cleaning and inlaying; after the inlaying of the sample is completed, the sample is subjected to polishing, polishing and corrosion, and then subjected to hardness detection.The application adds an intermediate annealing treatment to the solid solution and aging process of the exhaust sealing ring, improves the internal organization of the sealing ring, promotes the generation of internal strengthening phases, improves the hardness and strength of the material, prolongs the service life of the exhaust sealing ring, and solves the technical problems that the sealing device treated by using a traditional heat treatment process in the prior art cannot achieve a strict sealing effect, the workpiece quality is poor, and the service life is short.
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