Iron-based hard metal coating for nuclear valve sealing surfaces and method of making same

By preparing an iron-based hard alloy coating on the sealing surface of a nuclear valve, the problem of insufficient wear resistance and corrosion resistance of the sealing surface material of the nuclear valve is solved. The coating is formed by using the rotating electrode method and high-speed laser cladding technology, which achieves high efficiency and low cost, and realizes long service life and environmental improvement of the sealing surface of the nuclear valve.

CN117066518BActive Publication Date: 2025-11-11UNIV OF SCI & TECH BEIJING
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Patent Information

Application Number
CN202311193535.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-15
Publication Date
2025-11-11
Estimated Expiration
2043-09-15

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Abstract

The application provides an iron-based hard alloy coating for a nuclear valve sealing surface and a preparation method thereof, and belongs to the technical field of surface modification of metal materials. The preparation method comprises the following steps: melting raw materials Fe, C, Si, Cr, Ni, Mo and Mn according to a certain proportion to form an alloy rod; outputting alloy powder from the alloy rod through a rotating electrode powder production equipment, and performing screening and drying to obtain coating alloy powder; and synchronously melting the coating alloy powder and a pretreated nuclear valve sealing surface by using a coaxial powder feeding high-speed laser cladding method, so as to form an iron-based hard alloy coating on the surface of the nuclear valve sealing surface. The preparation method is simple, the iron-based alloy is low in price, the nuclear valve sealing surface is synchronously melted with the iron-based alloy by using high-speed laser melting, the iron-based alloy is coated on the nuclear valve sealing surface, the wear resistance and corrosion resistance are increased, and the service life of the nuclear valve sealing surface is prolonged.
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Citation Information

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