一种Ti-811高强耐热钛合金及其棒材制备方法
By designing the Al, Mo/Nb/Y/Ce composition and using the VIM+VAR process, the problems of decreased plasticity and Al segregation in Ti-811 titanium alloy at high temperatures were solved, enabling the preparation of high-strength, highly uniform, and low-cost Ti-811 titanium alloy bars, and improving service performance and processing yield above 650℃.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENYANG ZHJH SPECIAL METAL MATERIALS CO LTD
- Filing Date
- 2026-05-07
- Publication Date
- 2026-07-17
AI Technical Summary
Existing Ti-811 titanium alloys suffer from decreased plasticity, Al segregation leading to embrittlement, and high processing costs at temperatures above 650℃. Current improved processes have failed to achieve a balance between high heat resistance, high uniformity, and cost reduction.
A multi-element trace system of Al (7.5-8.5%) + trace Mo/Nb (total ≤0.6%) + rare earth Y/Ce (total ≤0.1%) was adopted, combined with vacuum induction melting (VIM) and water-cooled copper crucible vacuum self-consuming arc melting (VAR) processes, and optimized compositional uniformity and processing performance through electromagnetic stirring and low-temperature heating multi-directional forging.
This study achieved improved strength and plasticity of Ti-811 titanium alloy at temperatures above 650℃, reduced processing costs, and increased yield, demonstrating its potential for large-scale industrial application.
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Figure CN122147138B_ABST