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High-performance and low-cost high strength titanium alloy

A titanium alloy, low-cost technology, applied in the field of metal materials, can solve the problems of limited residual material, insignificant cost reduction effect, less titanium residual material, etc., and achieve the effect of reducing preparation cost, various smelting methods, and cost reduction.

Active Publication Date: 2020-08-11
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Application No. 201410628558.4 Patent "A Low-cost Titanium Alloy Adding Titanium Residuals" Although the method of adding more than a dozen titanium alloy remnants is used to reduce the cost of the alloy, the applicant adds β-stabilizing elements in order to ensure the performance of the alloy Relatively less, so the application of titanium residues is also relatively less, the effect of reducing costs is not obvious
In fact, due to the limitation of composition and performance, the existing low-cost alloys often add very limited residues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The titanium alloy of this example is composed of the following mass percentages: Al 6.2%, V 2.8%, Mo 0.4%, Zr 0.8%, Fe≤0.5%, O≤0.35%, the balance is Ti and other unavoidable impurities , the preparation process of the titanium alloy is as follows: the TC4 alloy bar reclaimed material and the TA15 alloy bar reclaimed material are mixed according to the mass ratio of 6:4, and then smelted in a vacuum consumable electric arc furnace to obtain a titanium alloy ingot, and then Titanium alloy ingots are processed by forging and rolling to obtain titanium alloy products; the tensile strength of the titanium alloy products after heat treatment is Rm=1020MPa, elongation A=14%, impact toughness a KU =65.2J / cm 2 .

Embodiment 2

[0021] The titanium alloy of this embodiment is composed of the following mass percentages: Al 6.25%, V 2.5%, Mo0.34%, Zr 1%, Fe≤0.5%, O≤0.35%, the balance is Ti and unavoidable others Impurities, the preparation process of the titanium alloy is as follows: the TC4 alloy plate reclaimed material and the TA15 alloy plate reclaimed material are mixed according to the mass ratio of 5:5 and then smelted in a vacuum consumable electric arc furnace to obtain a titanium alloy ingot, and then the titanium alloy The alloy ingot is processed by forging and rolling to obtain a titanium alloy product; the tensile strength of the titanium alloy product after heat treatment is Rm=950MPa, the elongation A=20.5%, and the impact toughness is a KU =80.6J / cm 2 .

Embodiment 3

[0023] The titanium alloy of this example is composed of the following mass percentages: Al 6.225%, V2.65%, Mo0.45%, Zr 0.9%, Fe≤0.5%, O≤0.35%, the balance is Ti and unavoidable For other impurities, the preparation process of the titanium alloy is as follows: the TC4 alloy riser reclaimed material and the TA15 alloy riser reclaimed material are mixed according to the mass ratio of 5.5:4.5 and then smelted in a vacuum consumable electric arc furnace to obtain titanium alloy ingots. Then the titanium alloy ingot is prepared by forging and rolling to obtain a titanium alloy product; the tensile strength of the titanium alloy product after heat treatment is Rm=1000MPa, elongation A=15.5%, impact toughness a KU =68.6J / cm 2 .

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Abstract

The invention discloses a high-performance and low-cost high strength titanium alloy. The titanium alloy is prepared from the following components in percentage by mass: 5.1 to 6.25 percent of Al, 2.5to 2.8 percent of V, 0.4 to 0.5 percent of Mo, 0.8 to 1.0 percent of Zr, less than or equal to 0.5 percent of Fe, less than or equal to 0.35 percent of O and the balance of Ti and other inevitable impurities. The titanium alloy is prepared by mixing and smelting a recovered TC4 alloy and a recovered TA15 alloy. The titanium alloy disclosed by the invention is prepared by directly mixing the recovered TC4 alloy and the recovered TA15 alloy proportionally and smelting. Through reasonable matched use of the two recovered materials, the raw material cost is lowered on the premise of ensuring thatthe titanium alloy has excellent mechanical property, so that the preparation cost of the titanium alloy is reduced greatly, and the demand for high performance of titanium alloy structural parts invarious industrial fields is met.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a high-performance, low-cost and high-strength titanium alloy. Background technique [0002] Due to its low density, high specific strength, corrosion resistance, and weldability, titanium alloys are widely used in important industrial fields such as aerospace, ships, weapons, and nuclear industries. The increasing application demand for materials in various fields has promoted the innovation and progress of titanium alloy technology, especially the aviation industry, which is the driving force for the development and application of high-end titanium alloys. However, this high-end application and high-tech platform have also pushed up the cost of titanium alloys, making the price of titanium alloys high. Limit its further use in the fields of ships, weapons, construction, automobiles, sports and leisure. At present, the biggest problem that titanium alloys c...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03
CPCC22C1/03C22C14/00
Inventor 辛社伟周伟李倩张思远毛小南赵永庆洪权贾蔚菊
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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