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Beta-type similar high-strength and high-tenacity titanium alloy

A tough titanium alloy and titanium alloy technology, applied in the field of near-beta type high-strength and high-toughness titanium alloy and titanium alloy, to achieve the effects of excellent performance, improved strength and toughness indicators, and good toughness-plastic matching.

Inactive Publication Date: 2017-03-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] With the development of marine engineering at home and abroad, the existing high-strength and high-toughness titanium alloy materials are not enough to meet people's needs. It is necessary to research and develop high-strength and high-toughness titanium alloys with tensile strength Rm≥1300MPa and yield strength Rp0.2≥1200MPa

Method used

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  • Beta-type similar high-strength and high-tenacity titanium alloy
  • Beta-type similar high-strength and high-tenacity titanium alloy
  • Beta-type similar high-strength and high-tenacity titanium alloy

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preparation example Construction

[0029] The preparation process of the near-β type high-strength and high-toughness titanium alloy in this application is as follows:

[0030] Alloy raw materials are configured according to the content range of the above-mentioned alloy elements and the requirements of molybdenum equivalent and aluminum equivalent. Raw materials can be selected from sponge titanium, Al-85V master alloy, Al-80Mo master alloy, Al-70Nb master alloy, pure aluminum and pure chromium.

[0031] The ingredients are mixed according to the ratio, pressed into electrodes, and smelted in a vacuum consumable electric arc furnace for 3 times to obtain alloy ingots. After the ingot is peeled off, the riser and tail are cut, the billet forging is carried out, and the intermediate multiple fires are deformed, and finally forged or rolled bars, plates, forgings and other semi-finished products of titanium alloys of this application, these alloys after appropriate heat treatment Semi-finished products can be man...

Embodiment 1

[0034] Ingredients by weight percentage, Al: 3%, Mo: 5%, V: 5%, Cr: 4%, Nb: 2%, and the balance is titanium. The raw materials are sponge titanium, Al-85V master alloy, Al-80Mo master alloy, Al-70Nb master alloy, pure aluminum and pure chromium. The ingredients are mixed according to the ratio, pressed into electrodes, and smelted in a vacuum consumable electric arc furnace for 3 times to obtain alloy ingots. After peeling the ingot and cutting the riser and tail, the heating temperature for blank forging is about 1150°C, and the heating temperature for repeated thickening and elongation is about 900°C, and the forging is 35mm×75mm×600mm square Great, see Table 1 for the data.

[0035]

Embodiment 2

[0037] Ingredients by weight percentage, Al: 3%, Mo: 6%, V: 5%, Cr: 3%, Nb: 2%, and the balance is titanium. The raw materials are sponge titanium, Al-85V master alloy, Al-80Mo master alloy, Al-70Nb master alloy, pure aluminum and pure chromium. The ingredients are mixed according to the ratio, pressed into electrodes, and smelted in a vacuum consumable electric arc furnace for 3 times to obtain alloy ingots. After peeling the ingot and cutting the riser and tail, the heating temperature for blank forging is about 1150°C, and the heating temperature for repeated thickening and elongation is about 900°C, and the forging is 35mm×75mm×600mm square Great, see Table 2 for the data.

[0038]

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Abstract

The invention discloses a beta-type similar high-strength and high-tenacity titanium alloy. The beta-type similar high-strength and high-tenacity titanium alloy is characterized by comprising alloy elements, by weight percentage, including 2.5%-3.5% of Al, 4%-6% of Mo, 4%-6% of V, 3%-5% of Cr, 1.5%-3% of Nb and the balance titanium and unavoidable impurities. According to the beta-type similar high-strength and high-tenacity titanium alloy, the tensile strength Rm is larger than or equal to 1,300 MPa, the yield strength Rp0.2 is larger than or equal to 1,200 MPa, the breaking tenacity K1C is larger than or equal to 70 MPa.m<1 / 2>, and the alloy is a high-strength and high-tenacity beta-type similar titanium alloy.

Description

technical field [0001] The present application relates to a titanium alloy, more specifically, to a near-β-type high-strength and high-toughness titanium alloy, which belongs to the field of material technology. Background technique [0002] Near-β-type high-strength and high-toughness titanium alloys are one of the main directions for the development of titanium alloys in recent years. Near-β-type high-strength and high-toughness titanium alloys are mainly used in the application field of materials by forging, deformation processing and supplemented by heat treatment strengthening process, and are used as structural parts in aviation, aerospace, navigation and other structural parts that require high strength and high toughness. [0003] Ti-1023 (Ti-10V-2Fe-3Al) in the United States and BT22 (Ti-5Al-5Mo-5V-1Cr-1Fe) in Russia have been the most widely used titanium alloy materials in this field since the 1970s. . Taking Ti-1023 as an example, the two commonly used grades a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18
CPCC22C14/00C22F1/183
Inventor 常辉李峰李栋李佳佳高桦姜荪周廉
Owner NANJING UNIV OF TECH
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