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A kind of high toughness titanium aluminum alloy plate and preparation method thereof

A titanium-aluminum alloy, high-toughness technology, applied in the field of titanium-aluminum alloy sheet and its preparation, can solve the problems of high allowable content of impurities, high possibility of metallurgical defects, short service life, etc., and achieves good matching of toughness and plasticity, and uniform structure The effect of easy controllability and improved batch stability

Inactive Publication Date: 2016-01-20
中航装甲科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its composition characteristics are: alloy elements allow a wide range of fluctuations (Al: 5.5%-6.75%), and allowable content of impurities (Fe: 0.3%max, O: 0.2%max, H: 0.015%max); thus bringing Higher potential for metallurgical defects, lower ductility and toughness, and shorter service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a high-toughness titanium-aluminum alloy plate is provided, wherein the mass percentage content of each component of the alloy is: Al9%, Ni5%, Mn0.9%, V0.4%, Nb0.4% , Si0.2%, Pb0.3%, Zr0.05%, Mo0.08%, Te0.04%, Fe0.07%, Co0.02%, Cr0.04%, Y0.02%, the rest is titanium and unavoidable non-metallic inclusions.

[0028] The method comprises the steps of:

[0029] (1) Dosing and mixing according to the titanium alloy components, and pressing it into a block electrode, melting it in a vacuum consumable electric arc furnace, and then casting it into an alloy ingot,

[0030] (2) Perform homogenization annealing treatment on the above alloy ingot, firstly heat the alloy ingot to 1040°C, holding time is 18 hours; then cool down to 900°C, holding time is 6 hours; then slowly cool down at 120°C / hour to room temperature,

[0031] (3) Forging the above-mentioned alloy ingot after homogenization annealing, the initial forging temperature is 1010°C, the final fo...

Embodiment 2

[0039] A method for preparing a high-toughness titanium-aluminum alloy plate is provided, characterized in that: the mass percent content of each component of the alloy is: Al10%, Ni6%, Mn1%, V0.5%, Nb0.5%, Si0 .3%, Pb0.4%, Zr0.06%, Mo0.09%, Te0.05%, Fe0.08%, Co0.03%, Cr0.05%, Y0.03%, the balance is titanium and not Avoid non-metallic inclusions.

[0040] The method comprises the steps of:

[0041] (1) Dosing and mixing according to the titanium alloy components, and pressing it into a block electrode, melting it in a vacuum consumable electric arc furnace, and then casting it into an alloy ingot,

[0042] (2) Perform homogenization annealing treatment on the above alloy ingot, firstly heat the alloy ingot to 1040°C, holding time is 18 hours; then cool down to 900°C, holding time is 6 hours; then slowly cool down at 120°C / hour to room temperature,

[0043] (3) Forging the above-mentioned alloy ingot after homogenization annealing, the initial forging temperature is 1010°C, ...

Embodiment 3

[0051] A method for preparing a high-toughness titanium-aluminum alloy plate is provided, characterized in that: the mass percent content of each component of the alloy is: Al9.5%, Ni5.5%, Mn0.95%, V0.45%, Nb0.45%, Si0.25%, Pb0.35%, Zr0.055%, Mo0.085%, Te0.045%, Fe0.075%, Co0.025%, Cr0.045%, Y0.025%, The balance is titanium and unavoidable non-metallic inclusions.

[0052] The method comprises the steps of:

[0053] (1) Dosing and mixing according to the titanium alloy components, and pressing it into a block electrode, melting it in a vacuum consumable electric arc furnace, and then casting it into an alloy ingot,

[0054] (2) Perform homogenization annealing treatment on the above alloy ingot, firstly heat the alloy ingot to 1040°C, holding time is 18 hours; then cool down to 900°C, holding time is 6 hours; then slowly cool down at 120°C / hour to room temperature,

[0055] (3) Forging the above-mentioned alloy ingot after homogenization annealing, the initial forging tempe...

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Abstract

The invention discloses a high-toughness titanium alloy sheet and a preparation method thereof. The high-toughness titanium alloy sheet is characterized by comprising the following components in percentage by mass: 9-10% of Al, 5-6% of Ni, 0.9-1% of Mn, 0.4-0.5% of V, 0.4-0.5% of Nb, 0.2-0.3% of Si, 0.3-0.4% of Pb, 0.05-0.06% of Zr, 0.08-0.09% of Mo, 0.04-0.05% of Te, 0.07-0.08% of Fe, 0.02-0.03% of Co, 0.04-0.05% of Cr, 0.02-0.03% of Y, and the balance of titanium and inevitable non-metallic inclusions. The structure homogeneity of the titanium alloy sheet is easily controlled, the performance advantages of low-clearance titanium alloys can be fully played, and the titanium alloy sheet is good in strength, toughness and plastic matching of processed materials.

Description

technical field [0001] The invention relates to a titanium-aluminum alloy plate and a preparation method thereof, belonging to the field of titanium-based alloy manufacturing. Background technique [0002] Ti-6Al-4V is the most widely used and most mature typical (α+β) two-phase titanium alloy. It has been researched and developed by various countries for nearly 40 years, and has its own alloy grade. Its composition characteristics are: alloy elements allow a wide range of fluctuations (Al: 5.5%-6.75%), and the allowable content of impurities is relatively high (Fe: 0.3%max, O: 0.2%max, H: 0.015%max); thus bringing Higher potential for metallurgical defects, lower ductility and toughness, and shorter service life. For this reason, a few developed countries led by the United States and the United Kingdom have developed corresponding low-gap alloys in the past 20 years, such as the United States UNSR56401, ASTMF468, Grade23, AMS4930, Ti-64ELI, the United Kingdom IMI318ELI, Fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/02C22F1/18
Inventor 张霞
Owner 中航装甲科技有限公司