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Reinforced and toughened metastable beta titanium alloy and preparation method thereof

A technology for strengthening and toughening, beta titanium alloys, applied in the field of titanium alloys, can solve problems such as the inability to produce aging strengthening effects, and achieve the effects of improving damage tolerance, improving chemical composition uniformity, and reducing melting point

Inactive Publication Date: 2018-07-31
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the contrary, TiNb alloy is a good superconducting wire and rivet material, which has good cold working performance. After aging treatment, there is no precipitated phase, but it cannot produce aging strengthening effect.

Method used

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  • Reinforced and toughened metastable beta titanium alloy and preparation method thereof
  • Reinforced and toughened metastable beta titanium alloy and preparation method thereof
  • Reinforced and toughened metastable beta titanium alloy and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0026] The preparation method of the above-mentioned reinforced and toughened metastable β-titanium alloy is specifically implemented according to the following steps:

[0027] Step 1, preparation of consumable electrodes:

[0028] According to the requirements of the alloy composition, weigh the powdered aluminum vanadium niobium alloy, granular aluminum molybdenum alloy, aluminum chromium and aluminum iron alloy, aluminum beans, and small particle sponge titanium not exceeding 0.8mm, and mix each raw material and press it into a diagonal The length is 240mm electrode block. The electrode blocks are clamped in series, and the electrode blocks are welded into consumable electrodes by plasma arc;

[0029] Step 2, vacuum consumable smelting:

[0030] The consumable electrode obtained in step 1 was vacuum smelted three times in a vacuum consumable electric arc furnace to obtain WSTi544432 titanium alloy ingot.

[0031] The primary melting parameters are: melting voltage 32-36V...

Embodiment 1

[0049] Step 1, preparation of consumable electrodes:

[0050] According to the requirements of the alloy composition, weigh the powdered aluminum vanadium niobium alloy, granular aluminum molybdenum alloy, aluminum chromium and aluminum iron alloy, aluminum beans, and small particle sponge titanium not exceeding 0.8mm, and mix the raw materials and press them into a diagonal The length is 240mm electrode block. The electrode blocks are clamped in series, and the electrode blocks are welded into consumable electrodes by plasma arc;

[0051] Step 2, vacuum consumable smelting:

[0052] The consumable electrode obtained in step 1 was vacuum smelted three times in a vacuum consumable electric arc furnace to obtain WSTi544432 titanium alloy ingot.

[0053] The primary melting parameters are: melting voltage 32-34V, melting current 20-22kA.

[0054] Secondary smelting parameters are: smelting voltage 34-36V, smelting current 23-25kA.

[0055] The three melting parameters are as ...

Embodiment 2

[0057] Step 1, preparation of consumable electrodes:

[0058] According to the requirements of the alloy composition, weigh the powdered aluminum vanadium niobium alloy, granular aluminum molybdenum alloy, aluminum chromium and aluminum iron alloy, aluminum beans, and small particle sponge titanium not exceeding 0.8mm, and mix the raw materials and press them into a diagonal The length is 240mm electrode block. The electrode blocks are clamped in series, and the electrode blocks are welded into consumable electrodes by plasma arc;

[0059] Step 2, vacuum consumable smelting:

[0060] The consumable electrode obtained in step 1 was vacuum smelted three times in a vacuum consumable electric arc furnace to obtain WSTi544432 titanium alloy ingot.

[0061] The primary melting parameters are: melting voltage 34-36V, melting current 22-24kA.

[0062] Secondary smelting parameters are: smelting voltage 36-38V, smelting current 25-27kA.

[0063] The three melting parameters are: af...

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Abstract

The invention discloses a reinforced and toughened metastable beta titanium alloy. The reinforced and toughened metastable beta titanium alloy comprises the following elements in percentage by weight:3.6-6.0% of Al, 3.0-5.0% of Mo, 3.0-5.0% of V, 2.0-5.9% of Cr, 1.0-4.0% of Nb, 0.4-2.0% of Fe, 0.05-0.3% of O, and the balance of Ti and inevitable impurities; the total quantity of impurity elementsis not higher than 0.15%; and the weight percentage sum of all the components is 100%. The invention further discloses a preparation method of the titanium alloy. Through changing of the adding formof Nb element, formation of the high-density inclusion defect of Nb-enriched non-melted blocks is prevented. Step variable-power smelting process parameters are adopted, so that the ingot chemical component uniformity is improved, and the component uniformity and the performance stability of the WSTi544432 metastable beta titanium alloy are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, and in particular relates to a reinforced and toughened metastable beta titanium alloy, and also relates to a preparation method of the metastable beta titanium alloy. Background technique [0002] The nominal composition of WSTi544432 is Ti-5Al-4Mo-4V-4Cr-3Nb-2Fe, which is a metastable β-type titanium alloy. WSTi544432 alloy has higher specific strength and elongation at room temperature, and its fracture toughness is better than that of traditional Ti-Al-Mo-V-Cr-Fe metastable β-titanium alloy. When the strength reaches 1350MPa level, K IC Can still reach 65MPa·m 0.5 , while American Timetal555, Russian VST55531 and domestic TC18 titanium alloy are at the same strength level, K IC Still less than 50MPa·m 0.5 , unable to meet the needs of large-scale aerospace structural parts. [0003] The Nb element in the WSTi544432 titanium alloy is a weak β-stable element, and its atomic radius i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/03C22B9/20
CPCC22C14/00C22B9/20C22C1/03
Inventor 孙峰付杰罗文忠崔林林雷锦文王凯旋刘向宏冯勇
Owner 西部超导材料科技股份有限公司
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