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Low-cast and superplasticity titanium alloy

A technology of superplasticity and titanium alloy, which is applied in the field of low-cost superplastic titanium alloy, can solve the problems of restricting the wide application of titanium alloy, difficulty in processing titanium alloy, and high cost of titanium alloy products, so as to reduce processing cost, facilitate plastic deformation, reduce The effect of raw material costs

Inactive Publication Date: 2005-02-23
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing of titanium alloys is difficult, which makes the cost of titanium alloy products relatively high, thus limiting the wide application of titanium alloys.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] According to the nominal alloy composition, the ingot is prepared by melting twice in a vacuum consumable electric arc furnace. The weight percentage of the alloy is: aluminum is 3.2%, vanadium is 2.0%, molybdenum is 3.0%, iron is 2.0%, and chromium is 1.0%, the balance is titanium and unavoidable impurities. After forging, the alloy is processed into a rod with a diameter of Φ25mm. After heat treatment at 850°C / 1h, WQ+510°C / 8h, AC system, the tensile properties at room temperature are: tensile strength σ b =1010MPa, yield strength σ 0.2 =970MPa, elongation δ=21%, reduction of area Ψ=59%. Under the conditions of a temperature of 850° C. and a stretching speed of 2 mm / min, the elongation δ was 1000%.

Embodiment 2

[0010] According to the nominal alloy composition, the ingot is prepared by two times of vacuum consumable electric arc furnace melting. The weight percentage of the alloy is as follows: aluminum is 4.5%, vanadium is 3.0%, molybdenum is 2.0%, iron is 1.0%, and chromium is 1.0%, the balance is titanium and unavoidable impurities. After forging, the alloy is processed into a rod with a diameter of Φ25mm. After heat treatment at 850°C / 1h, WQ+510°C / 8h, AC system, the tensile properties at room temperature are: tensile strength σ b =1030MPa, yield strength σ 0.2 =980MPa, elongation δ=19%, reduction of area Ψ=56%. Under the conditions of a temperature of 850° C. and a stretching speed of 2 mm / min, the elongation δ was 1000%.

Embodiment 3

[0012] According to the nominal alloy composition, the ingot is prepared by melting twice in a vacuum consumable electric arc furnace. The weight percentage of the alloy is: aluminum is 5.5%, vanadium is 3.5%, molybdenum is 2.5%, iron is 1.5%, and chromium is 1.5%, the balance is titanium and unavoidable impurities. After forging, the alloy is processed into a rod with a diameter of Φ25mm. After heat treatment at 850°C / 1h, WQ+510°C / 8h, AC system, the tensile properties at room temperature are: tensile strength σ b =1100MPa, yield strength σ 0.2 =990MPa, elongation δ=15%, reduction of area Ψ=50%. Under the conditions of a temperature of 850° C. and a stretching speed of 2 mm / min, the elongation δ was 1000%.

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Abstract

A low-cost super-plastic titanic alloy consists of Al 3.0-6.0wt%, V 2.0-4.0wt%, Mo 1.0-3.0wt%, iron 0.5-2.0wt%, Cr 0.5-2.0wt%. It achieves low cost and easy plastic deformation.

Description

technical field [0001] A low-cost superplastic titanium alloy relates to a near-beta low-cost superplastic titanium alloy. Background technique [0002] Titanium alloy has low density, high specific strength, and good corrosion resistance. It is an ideal structural material and plays an important role in military fields such as aircraft and ships and civilian fields such as chemical and pharmaceutical industries. However, the processing of titanium alloys is difficult, which makes the cost of titanium alloy products relatively high, thus limiting the wide application of titanium alloys. The development of superplastic titanium alloys enables titanium alloys to be net-shaped through superplastic forming diffusion connection technology materials at superplastic temperatures, thereby reducing processing procedures, improving material utilization, and manufacturing structural parts with complex shapes at one time. While the cost of alloy manufacturing is reduced, the weight is ...

Claims

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Application Information

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IPC IPC(8): C22C14/00
Inventor 赵永庆吴欢冯亮李月璐朱康英刘彩利
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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