Ferritic martensitic steel resistant to liquid lead bismuth corrosion and method for its production
By adding rare earth element Y to ferritic martensitic steel and controlling its distribution in molten steel, a ferritic martensitic steel resistant to liquid lead-bismuth corrosion was prepared. This solved the problem of insufficient resistance of ferritic martensitic steel to liquid lead-bismuth corrosion, improved the high-temperature strength and radiation resistance of the material, and enhanced its comprehensive mechanical properties.
CN116695003BActive Publication Date: 2026-06-02CHINA NUCLEAR POWER TECH RES INST CO LTD
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA NUCLEAR POWER TECH RES INST CO LTD
- Filing Date
- 2022-02-24
- Publication Date
- 2026-06-02
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Figure CN116695003B_ABST
Abstract
The application provides a ferrite martensite steel resistant to liquid lead bismuth corrosion and a preparation method thereof. The ferrite martensite steel is prepared by adding 0.01-1.0% of rare earth Y in the Fe-Cr-Si ferrite martensite steel. The preparation method of the ferrite martensite steel comprises the steps of smelting, casting, forging, controlled rolling and controlled cooling and heat treatment, and the casting speed is 1-40 mm / s. The Y element can inhibit the outward diffusion of iron atoms, hinder the formation of the iron-containing oxide film, and further make the Si-containing oxide film form in advance, so that the protection effect on the matrix is improved, and the corrosion resistance of the ferrite martensite to liquid lead bismuth is improved.
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