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Titanium alloy with excellent hot-workability and preparation method thereof

A titanium alloy and thermal processing technology, which is applied in the field of material processing, can solve the problems of large rheological resistance and poor thermal processing performance, and achieve the effect of reducing rheological resistance

Inactive Publication Date: 2017-03-29
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the TC4 titanium alloy faces the disadvantage of high rheological resistance during plastic deformation processing at high temperature, resulting in poor hot workability

Method used

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  • Titanium alloy with excellent hot-workability and preparation method thereof
  • Titanium alloy with excellent hot-workability and preparation method thereof
  • Titanium alloy with excellent hot-workability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A titanium alloy with excellent hot workability, consisting of 6% Al, 4% V, 0.5% Fe, ≤0.2% O, ≤0.05% C, ≤0.05% N, and ≤0.05% N by weight percentage ≤0.01%, the balance is Ti. Quantitative aluminum beans, aluminum-vanadium alloys, aluminum-iron alloys and TiO 2 The powder is wrapped in aluminum foil and folded to form an alloy package; the alloy package is placed in the sponge titanium and pressed into a dense electrode block by a press, and the welding electrode block is formed by means of argon arc welding; then the arc voltage is 28-30V, Arc current 3~3.6kA and vacuum degree 10 -2 Under the condition of Pa, the above-mentioned welding electrode block is subjected to secondary vacuum smelting, each smelting time is 15-20min, and an ingot with a mass of about 30kg is obtained. Before the ingot is opened and forged, the surface of the ingot is peeled 3-6mm on one side, and the hydrogen-oxygen sample and chip sample are taken at a distance of 150-250mm from the head of ...

Embodiment 2

[0037] A titanium alloy with excellent hot workability, by weight percentage: 6.5% for Al, 4.5% for V, 1.0% for Fe, ≤0.2% for O, ≤0.05% for C, ≤0.05% for N, and ≤0.05% for H ≤0.01%, the balance is Ti; quantitative aluminum beans, aluminum vanadium alloys, aluminum iron alloys and TiO 2 The powder is wrapped in aluminum foil and folded to form an alloy package; the alloy package is placed in the sponge titanium and pressed into a dense electrode block by a press, and the welding electrode block is formed by means of argon arc welding; then the arc voltage is 28-30V, Arc current 3~3.6kA and vacuum degree 10 -2 Under the condition of Pa, the above-mentioned welding electrode block is subjected to secondary vacuum smelting, each smelting time is 15-20min, and an ingot with a mass of about 30kg is obtained. Before the ingot is opened and forged, the surface of the ingot is peeled 3-6mm on one side, and the hydrogen-oxygen sample and chip sample are taken at a distance of 150-250mm...

Embodiment 3

[0039] This example relates to the detection of the microstructure of the titanium alloy of the present application with excellent hot workability.

[0040] Adopt metallographic microscope to magnify 1000 times and observe the titanium alloy with excellent hot workability prepared by embodiment 1, as figure 1 shown by figure 1 It can be seen that the forged structure of the titanium alloy is a large area of ​​Widmanstatten structure and a little basket structure, and the uniform and fine flaky α phase is neatly arranged in the original β grains. Among them, the β phase accounts for about 20%, which is beneficial to the high temperature deformation of the alloy.

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Abstract

The invention discloses titanium alloy with excellent hot-workability. The titanium alloy comprises the following alloy elements in percentages by weight: 5.8-6.8% of Al, 3.8-4.8% of V, 0.5-1.5% of Fe, and the balance being titanium and unavoidable impurities. The invention also discloses a preparation method of the titanium alloy, and the method comprises the following steps: preparation of alloy clad, compacting of electrodes and welding, vacuum arc remelting, cogging and forging, free forging, and the like. The Fe element is added, resistance for flowing deformation in plastic deformation of alloy hot-working is reduced, so that compared with TC4 alloy, the cost for hot-working of the alloy is reduced by 15%.

Description

technical field [0001] The application relates to a titanium alloy with excellent thermal processing performance and a preparation method thereof, belonging to the technical field of material processing. Background technique [0002] TC4 titanium alloy, as the most widely used α+β two-phase titanium alloy, has been widely used in aircraft landing gear, engine blades and automobile connecting rods due to its excellent comprehensive properties such as high specific strength and strong corrosion resistance. on parts. However, TC4 titanium alloy faces the disadvantage of high rheological resistance during plastic deformation processing at high temperature, resulting in poor hot workability. [0003] In view of the poor thermal workability of titanium alloys, in the prior art, the following methods are generally used to solve this problem: (1) Adding strong β-stabilizing elements to obtain a large number of β phases with excellent thermal workability, reducing the thermal deform...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03
CPCC22C1/03C22C14/00
Inventor 常辉郭艳华朱晓弦淡振华李佳佳李峰周廉
Owner NANJING UNIV OF TECH
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