METHOD FOR PREPARING a-TITANIUM ALLOY SHEET HAVING HIGH DEFORMATION TWIN DENSITY
The method addresses the imbalance in strength and toughness of α-titanium alloy plates by incorporating Fe microalloying and a specialized rolling process, resulting in enhanced mechanical properties through high-density deformation twins.
EP4759950A1Pending Publication Date: 2026-06-17CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-06-17
AI Technical Summary
Technical Problem
Existing methods for preparing α-titanium alloy plates fail to achieve a balanced combination of strength and toughness, particularly in Ti-Al-B-based alloys, and lack practicality in large-scale applications.
Method used
A method involving microalloying with β-stabilizing element Fe, three vacuum arc remelting operations, and a direct rolling + two-stage hot rolling process with high pass deformation to produce a high-density deformation twin structure in α-titanium alloy plates.
Benefits of technology
The method enhances the balance between strength and toughness of the alloy by promoting the formation of deformation twins, improving mechanical properties while ensuring structural uniformity and reducing costs.
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Abstract
A method for preparing an α-titanium alloy plate with high deformation twin density is provided, relating to the field of titanium alloy technology, comprising: adding titanium sponge, aluminum pellets, titanium diboride, Ti-32Fe, titanium dioxide as raw materials into a smelting furnace, and performing three vacuum arc remelting operations to obtain an ingot; measuring β transus temperature Tβ of the Ti-Al-B-based alloy by differential thermal analysis, and performing two-stage hot rolling on the ingot to obtain a slab; heating the slab to the temperature of Tβ, holding for a first time and then water cooling, and then heating the slab to (Tβ-200) °C, holding for a second time and then air cooling to room temperature to obtain the plate. For Ti-Al-B-based α-titanium alloy, the present application adopts a microalloying design of adding β-stabilizing element Fe, performs three vacuum arc remelting operations, and employs a process of direct rolling for cogging + two-stage hot rolling process with high pass deformation to prepare a high-density deformation twin plate, ensuring the structural uniformity of the alloy and the balance of strength and toughness at a lower cost.
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