High-strength Ti-Cr-Zr-Mo-Al series titanium alloy and preparation method

A titanium alloy, high-strength technology, applied in the direction of metal processing equipment, etc., can solve the problems of low cost and high cost

Active Publication Date: 2021-09-14
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the shortcomings of some high-strength titanium alloys commonly used at present, which have relatively high content of elements such as V, Mo and Nb, which lead to high costs, the present invention proposes a Ti-Cr-Zr-Mo-Al series titanium alloy with high strength, which has Excellent mechanical properties, not easy to cause composition segregation, and has the advantage of low cost

Method used

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  • High-strength Ti-Cr-Zr-Mo-Al series titanium alloy and preparation method
  • High-strength Ti-Cr-Zr-Mo-Al series titanium alloy and preparation method

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Embodiment 1

[0034] A method for preparing a high-strength Ti-Cr-Zr-Mo-Al titanium alloy, specifically comprising the following steps:

[0035] Step 1. The master alloy is prepared by adopting a cold crucible suspension melting method.

[0036] The following raw materials were weighed in percentage, Al 4.27%, Cr 2.50%, Zr 2.60%, Mo 7.28%, Ti 83.35% and unavoidable other impurities.

[0037] Mix the above-mentioned high-purity Ti, high-purity Al, high-purity Zr, high-purity Mo and high-purity Cr evenly, then bulk into a cold crucible suspension melting furnace, and then melt in a high-purity argon atmosphere, the melting current is 450A, the current The frequency is 20KHz, and it is kept for 15 minutes after the alloy is completely melted. In order to ensure uniform composition, the ingots were smelted repeatedly in the furnace upside down for 5 times;

[0038] Step 2, performing blank forging on the master alloy.

[0039] After cutting off the riser from the ingot obtained in step 1, ca...

Embodiment 2

[0046] A Ti-Cr-Zr-Mo-Al titanium alloy with high strength is composed of the following components in weight percentage: Al is 4.27%, Cr is 2.50%, Zr is 2.60%, Mo is 7.28%, and Ti is 83.35% and unavoidable other impurities.

[0047] According to the above components, the alloy is prepared by suspension melting in a cold crucible and free forging on a hammer. The specific preparation method is as follows:

[0048] (1) Master alloy preparation: high-purity Ti, high-purity Al, high-purity Zr, high-purity Mo, and high-purity Cr are accurately weighed according to the proportion and mixed evenly, then bulked into a cold crucible suspension melting furnace, and then heated in a high-purity argon atmosphere The smelting is carried out in the middle, the smelting current is 400A, and the current frequency is 22KHz. After the alloy is completely melted, keep it for 17min. In order to ensure uniform composition, the ingots were smelted repeatedly in the furnace upside down for 5 times; ...

Embodiment 3

[0054] A Ti-Cr-Zr-Mo-Al titanium alloy with high strength is composed of the following components in weight percentage: Al is 3.21%, Cr is 1.86%, Zr is 4.87%, Mo is 7.24%, and Ti is 82.82% and unavoidable other impurities.

[0055] According to the above components, the alloy is prepared by suspension melting in a cold crucible and free forging on a hammer. The specific preparation method is as follows:

[0056] (1) Master alloy preparation: high-purity Ti, high-purity Al, high-purity Zr, high-purity Mo, and high-purity Cr are accurately weighed according to the proportion and mixed evenly, then bulked into a cold crucible suspension melting furnace, and then placed in a high-purity argon atmosphere Melting is carried out in the middle, the melting current is 350A, the current frequency is 25KHz, and the alloy is kept for 20min after it is completely melted. In order to ensure uniform composition, the ingots were smelted repeatedly in the furnace upside down for 5 times;

[...

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Abstract

The invention discloses a high-strength Ti-Cr-Zr-Mo-Al series titanium alloy and a preparation method . The titanium alloy is prepared from the following components in percentage by mass: 2.5% to 6.0% of Al, 1.5% to 5.0% of Cr, 1.4% to 5.0% of Zr, 2.0% to 8.0% of Mo, less than or equal to 0.35% of O and the balance of Ti and other inevitable impurities. After the alloy is subjected to smelting, forging, solid solution and aging treatment, high strength and good plasticity can be obtained, composition segregation is not likely to be caused, meanwhile, the cost of alloy raw materials is low, and the production and manufacturing cost of the alloy is reduced to a certain degree. According to the high-strength Ti-Cr-Zr-Mo-Al series titanium alloy and the preparation method, the alloy meets the requirements of various industrial fields for high performance of titanium alloy structural parts, and can be widely applied to the industrial fields of aviation, aerospace, automobiles and the like.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a high-strength Ti-Cr-Zr-Mo-Al series titanium alloy and a preparation method. Background technique [0002] With the consumption of traditional fossil fuels, carbon dioxide (CO 2 ) The greenhouse effect and environmental problems caused by the emissions have attracted more and more attention. Countries all over the world have formulated strict plans to limit the use of traditional fossil fuels and the emission of greenhouse gases. Consumption of fossil fuels by various means of transportation and CO 2 Emissions cannot be ignored, and the lightweight of transportation means to reduce fossil fuel consumption and man-made CO 2 The key to emissions. The main approach to weight reduction is the increased use of structural materials with high specific strength (strength-to-weight ratio). High-specific-strength materials can reduce component size and structural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/02C22F1/18B21J5/00
CPCC22C14/00C22C1/02C22F1/002C22F1/183B21J5/002
Inventor 张金钰张航包翔云张冬冬刘刚孙军
Owner XI AN JIAOTONG UNIV
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