A method for manufacturing an alloy with excellent durability under high temperature and high pressure conditions

A technology of high temperature and high pressure, manufacturing method, applied in the direction of strength characteristics, the use of stable tension/pressure test material strength, instruments, etc., can solve the problem that cannot meet the requirements of high-end corrosion-resistant alloys on the oxygen content, hydrogen content and nitrogen content of molten steel Quantity requirements, the denitrification limit can only reach 25-35ppm, and can only reach 35-45ppm, etc., to achieve the effect of increasing element diffusion resistance, enhancing lattice distortion and interatomic bonding force, and optimizing composition
CN109988927BActive Publication Date: 2021-04-30江苏汉青特种合金有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
江苏汉青特种合金有限公司
Publication Date
2021-04-30

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Abstract

The invention provides a method for manufacturing an alloy with excellent durability under high temperature and high pressure conditions, comprising the following steps: 1) raw material preparation; 2) vacuum smelting, including: 2.1) charging; 2.2) melting; 2.3) refining; 2.4) pouring ; 3) electroslag remelting; 4) forging; 5) heat treatment; 6) durability performance testing, sampling, peeling, inspection, packaging, storage, and completing the manufacture of alloys with excellent durability under high temperature and high pressure conditions. On the one hand, the manufacturing method optimizes the design of alloying elements; moreover, in combination with the above-mentioned traditional vacuum degassing and desulfurization technologies, the desulfurization and degassing effects of Ni-Mg and rare earth are especially increased; on the other hand, Cr-Ni-Mo is optimized. The heat treatment process of ‑W alloy successfully produced a high-end Cr‑Ni‑Mo‑W alloy steel with a durable life of more than 500 hours under the conditions of high temperature 815 °C and high pressure 110 MPa.
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Description

technical field

[0001] The invention belongs to the technical field of building materials, and in particular relates to a method for manufacturing an alloy with excellent durability under high temperature and high pressure conditions. Background technique

[0002] Durable strength refers to the ability of metal materials, mechanical parts and components to resist high temperature fracture. Often expressed as a persistent limit. The stress that causes fracture of the sample at a certain temperature and specified duration is called the endurance limit.

[0003] Endurance life refers to the total time from the beginning of creep deformation to the fracture of the specimen.

[0004] To improve the lasting life and strength, it is necessary to suppress the sliding of the grain boundary and the diffusion of vacancies, that is to say, to control the diffusion process in the grain and the grain boundary. Generally, the durable life and durable strength of alloys can be improved f...

Claims

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