High-b low-p nickel-based alloy, and preparation method therefor

WO2025093068A1PCT designated stage expired Publication Date: 2025-05-08GAONA AERO MATERIAL CO LTD
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Patent Information

Application Number
PCT/CN2025/073909
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-01-30
Filing Date
2025-01-22
Publication Date
2025-05-08

AI Technical Summary

Technical Problem

Existing nickel-based high-temperature alloys are difficult to meet the comprehensive requirements of aerospace components for the high long-lasting life of alloys and the low crack propagation rate.

Method used

By accurately controlling the content of individual elements such as B, Zr, Fe, C, Cr, Co, Al, Ti in high-B low-P nickel-based alloys, the solid solution strengthening effect and grain boundary strength of the alloy are improved, and by collaboratively controlling the values ​​of B, Zr and C, the best matching of carbide morphology and distribution is ensured.

Benefits of technology

It has achieved high strength, low cycle fatigue performance, low crack propagation rate and excellent comprehensive performance, meeting the needs of high temperature and long-lasting life of aerospace components and low crack propagation rate.

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Abstract

The application discloses a high-B low-P nickel-based alloy and a preparation method therefor, belonging to the technical field of high-temperature alloys. The solution solves the problem that in the prior art, a nickel-based high-temperature alloy is difficult to meet comprehensive requirements of a component to have long alloy service life and low crack propagation rate at the same time. The high-B low-P nickel-based alloy comprises the following components in percentage by mass: C: 0.02% to 0.06%, Cr: 18.5% to 20.0%, Co: 13.0% to 14.0%, Mo: 4.0% to 4.90%, Al: 1.3% to 1.6%, Ti: 2.80% to 3.25%, B: 0.015% to 0.03%, Zr: 0.05% to 0.15%, Ti / Al: 2.25% to 2.38%, (Al + Ti): 4.35% to 4.58%, Fe: 0.05% to 2.0%, Mg ≤ 0.005%, P: 0.004% to 0.009%, O ≤ 20 PPm, N: ≤ 20 PPm, S ≤ 10 PPm, nickel: the remainder. The high-B low-P nickel-based alloy has high strength, good low-cycle fatigue performance, low crack propagation rate and excellent comprehensive performance.
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Citation Information

Patent Citations

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