High-strength titanium alloy plate and manufacturing method thereof

A titanium alloy plate, high-strength technology, applied in the field of titanium-based alloy manufacturing, can solve the problems of high allowable content of impurities, high possibility of metallurgical defects, short service life, etc., achieve good toughness and plasticity matching, and easy control of microstructure uniformity , The effect of improving batch stability

Active Publication Date: 2014-04-23
南通波斯佳织造科技有限公司
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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

[0028] A method for preparing a high-strength titanium alloy plate is provided, wherein the mass percent content of each component of the alloy is: Al 7%, Ni 3%, Cu 0.9%, V 0.3%, Bi 0.2%, Si 0.4%, Sn 0.2%, Mo 0.09%, Fe 0.03%, Co 0.03%, Cr 0.02%, Pr 0.01%, Y 0.01%, the balance is titanium and unavoidable non-metallic inclusions,

[0029] The method comprises the steps of:

[0030] (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,

[0031] (2) Perform homogenization annealing treatment on the above alloy ingot, firstly heat the alloy ingot to 1050°C, holding time is 20 hours; then cool down to 920°C, holding time is 8 hours; then slowly cool down at 100°C / hour to room temperature.

[0032] (3) Forging the above-mentioned alloy ingot after homogenization annealing, the initial forging temperature is 1000°C, the final forging te...

Embodiment 2

[0041] A method for preparing a high-strength titanium alloy plate is provided, characterized in that: the mass percent content of each component of the alloy is: Al 8%, Ni 4%, Cu 1%, V 0.4%, Bi 0.3%, Si 0.5%, Sn 0.3%, Mo 0.1%, Fe 0.04%, Co 0.04%, Cr 0.03%, Pr 0.02%, Y 0.02%, the balance is titanium and unavoidable non-metallic inclusions,

[0042] The method comprises the steps of:

[0043] (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,

[0044] (2) Perform homogenization annealing treatment on the above alloy ingot, firstly heat the alloy ingot to 1050°C, holding time is 20 hours; then cool down to 920°C, holding time is 8 hours; then slowly cool down at 100°C / hour to room temperature.

[0045] (3) Forging the above-mentioned alloy ingot after homogenization annealing, the initial forging temperature is 1000°C, the fina...

Embodiment 3

[0054] A method for preparing a high-strength titanium alloy plate is provided, wherein the mass percentage of each component of the alloy is: Al 7.5%, Ni 3.5%, Cu 0.95%, V 0.35%, Bi 0.25%, Si 0.45%, Sn 0.25%, Mo 0.095%, Fe 0.035%, Co 0.035%, Cr 0.025%, Pr 0.015%, Y 0.015%, the balance is titanium and unavoidable non-metallic inclusions,

[0055] The method comprises the steps of:

[0056] (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,

[0057] (2) Perform homogenization annealing treatment on the above alloy ingot, firstly heat the alloy ingot to 1050°C, holding time is 20 hours; then cool down to 920°C, holding time is 8 hours; then slowly cool down at 100°C / hour to room temperature.

[0058] (3) Forging the above-mentioned alloy ingot after homogenization annealing, the initial forging temperature is 1000°C, the final ...

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Abstract

The invention discloses a high-strength titanium alloy plate and a manufacturing method thereof. The titanium alloy plate is characterized by comprising the following components in percentage by mass: 7-8% of Al, 3-4% of Ni, 0.9-1% of Cu, 0.3-0.4% of V, 0.2-0.3% of Bi, 0.4-0.5% of Si, 0.2-0.3% of Sn, 0.09-0.1% of Mo, 0.03-0.04% of Fe, 0.03-0.04% of Co, 0.02-0.03% of Cr, 0.01-0.02% of Pr, 0.01-0.02% of Y and the balance of titanium and unavoidable nonmetallic inclusions. The titanium alloy plate has the advantages that the batch stability of the plate performance is increased; the strength meets the index requirements; the tensile strength is up to more than 1200MPa.

Description

technical field [0001] The invention relates to a high-strength titanium 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 mature typical (α+β) two-phase titanium alloy. The history of research and development in various countries has been nearly 40 years, and it has its own alloy grade. 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. For this reason, a small number of 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 UNS R56401, ASTM F468, Grade 23, AMS4930, Ti-64ELI, the United Kingdom IMI318ELI,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/02C22F1/18
Inventor 张霞
Owner 南通波斯佳织造科技有限公司
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