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Ti-V-Mo-Zr-Cr-Al series high-strength metastable beta titanium alloy and manufacturing method thereof

A ti-v-mo-zr-cr-al, β titanium alloy technology, applied in the direction of temperature control, etc., can solve the problem that the strength of titanium alloy cannot meet the use

Inactive Publication Date: 2021-04-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem that the strength of existing titanium alloys cannot meet the requirements of use, the present invention provides a new type of high-strength metastable β-titanium alloy based on Ti-V-Mo-Zr-Cr-Al and its preparation method, and its tensile strength reaches 1350-1471MPa

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  • Ti-V-Mo-Zr-Cr-Al series high-strength metastable beta titanium alloy and manufacturing method thereof
  • Ti-V-Mo-Zr-Cr-Al series high-strength metastable beta titanium alloy and manufacturing method thereof
  • Ti-V-Mo-Zr-Cr-Al series high-strength metastable beta titanium alloy and manufacturing method thereof

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preparation example Construction

[0033] The preparation method of the above-mentioned Ti-V-Mo-Zr-Cr-Al series high-strength metastable β-titanium alloy comprises the following steps:

[0034] Step 1. The raw materials are uniformly mixed according to weight percentage and loaded into a furnace in bulk, followed by induction suspension melting in a cold crucible, and cooling to obtain an ingot.

[0035] During the smelting process, argon gas is introduced, the induction current is 400-600A, and the current frequency is 20-25KHz. After the alloy is completely melted, it is kept for 3-5 minutes, and the ingot is obtained by cooling. The number of smelting times is not less than 5.

[0036] The raw materials used in the alloy smelting include: high-purity titanium, high-purity vanadium, high-purity molybdenum, high-purity aluminum, high-purity zirconium and high-purity chromium.

[0037] Step 2. Homogenize the obtained ingot at a high temperature of 1000° C. for 1 hour, and then water-cool to room temperature.

...

Embodiment 1

[0042] In this embodiment, Ti-V-Mo-Zr-Cr-Al is a new type of high-strength metastable β-titanium alloy, which consists of the following components by weight percentage: V 4%, Mo 8.5%, Zr 1%, Cr 2.5%, Al 5.5 %, the balance is Ti and unavoidable impurities.

[0043]The preparation method of the Ti-V-Mo-Zr-Cr-Al series high-strength metastable β-titanium alloy of this embodiment comprises the following steps:

[0044] (1) The raw materials used in the alloy smelting include: high-purity titanium, high-purity vanadium, high-purity molybdenum, high-purity aluminum, high-purity zirconium and high-purity chromium. The raw materials are mixed uniformly according to the proportion and loaded into the furnace in bulk, and then cooled Crucible induction suspension smelting, argon gas is introduced during the smelting process, the induction current is 400A, and the current frequency is 20KHz. After the alloy is completely melted, it is kept for 3 minutes, cooled to obtain an ingot, and sm...

Embodiment 2

[0051] The Ti-V-Mo-Zr-Cr-Al high-strength metastable β-titanium alloy in this embodiment consists of the following components by weight percentage: V 5%, Mo 6%, Zr 1%, Cr 4%, Al 5% , the balance being Ti and unavoidable impurities.

[0052] The preparation method of the Ti-V-Mo-Zr-Cr-Al series high-strength metastable β-titanium alloy comprises the following steps:

[0053] (1) The raw materials used in the alloy smelting include: high-purity titanium, high-purity vanadium, high-purity molybdenum, high-purity aluminum, high-purity zirconium and high-purity chromium. The raw materials are mixed uniformly according to the proportion and loaded into the furnace in bulk, and then cooled Crucible induction suspension smelting, argon gas is introduced during the smelting process, the induction current is 500A, and the current frequency is 22KHz. After the alloy is completely melted, it is kept for 4 minutes, cooled to obtain an ingot, and smelted 8 times.

[0054] (2) Homogenize th...

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Abstract

The invention discloses Ti-V-Mo-Zr-Cr-Al series high-strength metastable beta titanium alloy and a manufacturing method of the Ti-V-Mo-Zr-Cr-Al series high-strength metastable beta titanium alloy. After Ti-V-Mo-Zr-Cr-Al series metastable beta titanium alloy is subjected to smelting, hot rolling and solid solution aging treatment, the high-strength titanium alloy with the high strength and the certain plasticity can be obtained. The Ti-V-Mo-Zr-Cr-Al series titanium alloy comprises, by weight percentage, 4.0%-8.0% of V, 5.0%-8.5% of Mo, 0.5%-1.5% of Zr, 1.5%-4.0% of Cr, 5.0%-6.0% of Al and the balance Ti. The titanium alloy has the outstanding mechanical properties, and when the titanium alloy is in a solid solution state, the tensile strength can be 769MPa to 855MPa, and the elongation is 4.3% to 15.9%. After solid solution aging is formed, the tensile strength can be 1350MPa to 1471MPa, the certain strength and plasticity matching is achieved, and the elongation is 2.9% to 7.2%.

Description

Technical field [0001] The invention belongs to the technical field of high-performance alloy materials, and is specifically a Ti-V-Mo-Zr-Cr-Al high-strength metastable beta titanium alloy and a preparation method thereof. Background technique [0002] Titanium and titanium alloys have excellent mechanical and physical properties, including high specific strength, low elastic modulus, high fatigue resistance, high toughness, excellent corrosion resistance, good formability and excellent biocompatibility. They are used in aviation It is widely used in aerospace, energy industry, petrochemical industry, biomedicine and other fields. For high-strength titanium alloys Ti1023, Ti5553, Ti55531, etc., the yield strength of such alloys after aging is generally around 1200-1300MPa, and their forgings have been successfully used in key components such as aircraft landing gear and connecting rods. [0003] Generally speaking, the types of high-strength and high-toughness titanium allo...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22F1/18B21B37/74
Inventor 张金钰杨家坤包翔云刘刚孙军
Owner XI AN JIAOTONG UNIV
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