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Ti-Al-Mo-Cr series beta titanium alloy with ultralow elastic modulus and ultrahigh work hardening rate and heat treatment process thereof

A technology of ti-al-mo-cr and elastic modulus, which is applied in the field of titanium alloy processing, can solve the problems that limit the application and promotion of titanium alloys, and achieve the suppression of Ti-Cr eutectoid reaction, high work hardening rate, and good strong plasticity matching effect

Active Publication Date: 2021-06-04
西安稀有金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two points have greatly limited the application and promotion of titanium alloys.

Method used

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  • Ti-Al-Mo-Cr series beta titanium alloy with ultralow elastic modulus and ultrahigh work hardening rate and heat treatment process thereof
  • Ti-Al-Mo-Cr series beta titanium alloy with ultralow elastic modulus and ultrahigh work hardening rate and heat treatment process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The Ti-Al-Mo-Cr series β-titanium alloy of this embodiment is composed of the following components in mass percentage: Al 4.7%, Mo 6.26%, Cr 2.85%, and the balance is Ti and unavoidable impurity elements; the Ti - Md=2.386, Bo=2.768 of the Al-Mo-Cr system β titanium alloy.

[0021] The preparation process of the Ti-Al-Mo-Cr series β-titanium alloy in this embodiment is as follows: according to the design composition of the target product, the Al-Mo master alloy is uniformly mixed with electrolytic Cr, sponge titanium, and aluminum beans, and pressed into electrodes, and then Carry out two vacuum self-consumption smelting to obtain ingots, and control the content of impurity elements in the ingots C≤0.1%, N≤0.03%, H≤0.15%, O≤0.15%; Insulate for 12 hours for high-temperature homogenization treatment, after peeling, cutting the riser and tail end, and then carry out billet forging at 1100 °C in sequence, at (T β +50℃)~(T β +100°C) to complete two-fire and three-fire forg...

Embodiment 2

[0025] The difference between this example and Example 1 is that the solution treatment temperature is 860°C.

Embodiment 3

[0027] The difference between this example and Example 1 is that the solution treatment temperature is 810°C.

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Abstract

The invention discloses a Ti-Al-Mo-Cr series beta titanium alloy with the ultralow elastic modulus and the ultrahigh work hardening rate. The Ti-Al-Mo-Cr series beta titanium alloy is composed of the following components of, in percentage by mass, 4.5%-5.5% of Al, 6.0%-7.0% of Mo, 2.5%-3.5% of Cr and the balance Ti and inevitable impurity elements. The invention further discloses a heat treatment process for carrying out solution treatment on the Ti-Al-Mo-Cr series beta titanium alloy at the temperature of (T-50 DEG C) to (T + 50 DEG C). According to the Ti-Al-Mo-Cr series beta titanium alloy with the ultralow elastic modulus and the ultrahigh work hardening rate, by designing the components and content of the titanium alloy, martensite phase transformation is easily induced when the titanium alloy deforms at room temperature, so that the elastic modulus of the alloy is reduced, and the ultrahigh work hardening rate is achieved; and according to the Ti-Al-Mo-Cr series beta titanium alloy with the ultralow elastic modulus and the ultrahigh work hardening rate, the solution treatment temperature of the Ti-Al-Mo-Cr series beta titanium alloy is controlled, so that the Ti-Al-Mo-Cr series beta titanium alloy is in an easily unstable state within a large temperature range, and the ultralow modulus and the ultrahigh work hardening rate performance of the Ti-Al-Mo-Cr series beta titanium alloy are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to an ultra-low elastic modulus and ultra-high work hardening rate Ti-Al-Mo-Cr series beta titanium alloy and a heat treatment process thereof. Background technique [0002] Titanium alloys are widely used in various fields because of their high specific strength, good plasticity, biocompatibility and corrosion resistance. Each titanium alloy has a corresponding application field according to its microstructure and performance characteristics. α-titanium alloys are generally low in strength, but have good heat resistance and corrosion resistance and are used as chemical pipelines and pressure vessels. The TC4 (Ti-6Al-4V) alloy developed in the United States is a typical medium-strength α+β titanium alloy, which has good comprehensive properties and processing properties and is widely used in the aerospace field. There is also a typical high-strength m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18C22C1/03
CPCC22C14/00C22F1/183C22F1/002C22C1/03
Inventor 赵彬辛超陈曦吴金平潘晓龙杨帆赵恒章
Owner 西安稀有金属材料研究院有限公司
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