Preparation method of ultrahigh-hardness titanium alloy plate

Titanium alloy sheets are prepared by using specific components and multi-stage deformation processes to form nano-precipitates, which solves the problems of low hardness and unstable heat treatment of titanium alloys, achieving high hardness and good formability, and is suitable for wear-resistant components and industrial tool substrates.

CN122446098APending Publication Date: 2026-07-24INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202610329634.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-18
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing titanium alloy materials have low hardness and a narrow heat treatment process window, which makes them prone to wear under high contact stress or particle erosion conditions. Furthermore, it is difficult to produce large-size thin plates through rolling processes, which limits their application in the field of wear-resistant components.

Method used

By employing a specific titanium alloy composition and a multi-stage deformation process, including β-transformation temperature determination, multi-stage deformation, and solution-aging treatment, nanoscale precipitates are formed, widening the heat treatment temperature window, improving hardness, and maintaining good machinability.

Benefits of technology

It achieves high hardness (49-54HRC) in titanium alloy sheets, has a wide heat treatment process window and good processing and forming properties, and is suitable for wear-resistant structural parts and industrial tool substrates.

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Abstract

The invention relates to a preparation method of an ultrahigh-hardness titanium alloy plate, in particular to the technical field of titanium and titanium alloy materials. The method comprises the steps of cast ingot preparation, beta transformation temperature T beta measurement, high-temperature homogenization, cogging, upsetting and drawing deformation, three-time upsetting and three-time drawing in a single-phase region, three-time upsetting and three-time drawing in a two-phase region, plate blank shaping, hot rolling and solid solution-aging treatment. The titanium alloy comprises the following chemical components in percentage by weight: 3.0%-6.0% of Al, 0.5%-5.0% of V, 2.0%-6.0% of Cu, 2.0%-6.0% of Si, 2.0%-10.0% of Zr, 0%-2.0% of Sn, 1.0%-3.0% of Nb, 0.5%-3.0% of Mo, 0.5%-2.0% of Fe and the balance of Ti. The Rockwell hardness of the plate reaches 49-54 HRC through synergistic matching of the alpha-phase stable element and the beta-phase stable element and in combination with a nanoscale precipitated phase formed by Cu and Si elements in the aging process. According to the method, the solid solution-aging treatment temperature window is wide, the process stability is good, and the obtained plate has good hot working plasticity and thin plate forming capacity and is suitable for wear-resistant structural parts, industrial cutter base materials and mold plates.
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