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ti with high fracture toughness 2 Alnb-based alloy and its preparation method and application

A high-fracture, base alloy technology, applied in the field of titanium alloys, can solve problems such as the inability to meet the fracture toughness requirements of materials, and achieve the effect of low fatigue crack growth rate and high fracture toughness

Active Publication Date: 2021-04-20
BEIJING CISRI GAONA TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The first object of the present invention is to provide Ti with high fracture toughness 2 AlNb-based alloys to address Ti existing in prior art 2 The technical problem that AlNb-based alloys cannot meet the fracture toughness requirements of new-generation engines and other structures

Method used

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  • ti with high fracture toughness <sub>2</sub> Alnb-based alloy and its preparation method and application
  • ti with high fracture toughness <sub>2</sub> Alnb-based alloy and its preparation method and application
  • ti with high fracture toughness <sub>2</sub> Alnb-based alloy and its preparation method and application

Examples

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preparation example Construction

[0050]The present invention also provides a high breakage toughness Ti2The preparation method of AlNB base alloy includes the following steps:

[0051]Titanium, aluminum and niobium are used as raw materials, and after proportional ingredients, smelting is obtained.

[0052]In a particular embodiment of the invention, a ingot is prepared by vacuum self-consuming + coating + self-consuming melting method. Specifically, a vacuum self-consuming melting, second vacuum coating smelting, three vacuum self-consuming melting.

[0053]As an embodiment of the present invention, the specific process is: ingredient calculation, electrode pressing, electrode blanket welding, a vacuum self-consuming melting, secondary vacuum coating, three vacuum self-consuming smelting. First, according to the nominal ingredient component, the weight of the electrode is calculated, and then the raw material mixing and electrode press is performed, and the electrode is prepared, and the electrode is obtained, and after a ...

Embodiment 1

[0066]Ti of high break2Preparation of AlNB base alloy

[0067]High breakage toughness is prepared according to the proportional ingredients listed in Table 12The AlNb base alloy, the alloy ingredient made also see Table 1.

[0068]Table 1 Different high break toughness Ti2Ingredients for AlNB bases and end components

[0069]

[0070]Specifically, the above high-grade fracture toughness Ti2The preparation method of AlNb bases includes the following steps:

[0071]The spindle is prepared by vacuum self-consuming + coating + self-consuming melting method by vacuum self-consuming + coated melting method. The specific process is: ingredient calculation, electrode pressing, electrode blanket welding, a vacuum self-consuming melting, second vacuum coating, three vacuum self-consuming smelting. The raw materials required for ingots include: sponge titanium, high-purity aluminum peas, pure NB crumbs. First, according to the nominal ingredient component, the weight of the electrode is calculated, and then ...

Embodiment 2

[0073]Ti of high break2Preparation of AlNB base alloy

[0074]High breakage toughness is prepared according to the raw material and treatment method listed in Table 2.2AlNB base alloy parts.

[0075]Table 2 Different high break toughness Ti2Raw materials and treatment methods of AlNB base alloy

[0076]

[0077]Specifically, the above high-grade fracture toughness Ti2The preparation method of AlNb base alloy includes the following steps:

[0078]The φ180 mm finished ingot made in Example 1 was removed by the car cut into the surface of the skin, and the diameter of the surface of the surface was φ170 mmm; then the Ti was obtained by repeated upsetting.2The AlNB alloy rod, which results in a respective small tray after forging, and is obtained by the above solid-dissolving heat treatment and a time-heating heat treatment to obtain a respective tray.

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Abstract

The invention relates to the technical field of titanium alloys, in particular to a Ti alloy with high fracture toughness 2 AlNb-based alloys and their preparation methods and applications. Ti with high fracture toughness 2 The AlNb-based alloy is composed of the following components in terms of mass percentage: Al 10.25%~10.6%, Nb 43.0%~44.0%, the balance Ti and unavoidable impurities. The present invention adjusts and optimizes the alloy composition, so that the obtained Ti 2 AlNb-based alloys have high fracture toughness, and at the same time ensure that other comprehensive mechanical properties meet the requirements of use. Specifically, the high fracture toughness Ti of the present invention 2 AlNb-based alloys have high fracture toughness, low fatigue crack growth rate, good durability at 650°C / 360MPa and tensile plasticity at room temperature.

Description

Technical field[0001]The present invention relates to the field of titanium alloy techniques, in particular, Ti, which relates to high-breaking toughness.2AlNb base alloy and its preparation method and application.Background technique[0002]The Ti-Al-metal intermetallic compound has the advantages of low density, high specific intensity, good antioxidant properties, and is an alternative material for high temperature structural members applied at a temperature of 650 ° C. Early research on Ti-Al-alloys is mainly concentrated in Ti3Al base alloy and TiAl base these two types of materials through TI3Add NB elements in Al base alloy, in Ti3B2 phase is introduced into the Al group, allowing the room temperature and toughness of the alloy to be significantly improved. In 1988, researchers such as BaaNerjee were in strong torization Ti3In the study of Al base alloys, it was found that a component was generated in Ti with an increase in Nb content.2Near AlNB, has a new phase of the orthogon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/18
CPCC22C1/02C22C14/00C22C30/00C22F1/183F05D2300/174
Inventor 王红卫梁晓波张建伟马雄张熹雯史晓强程云君王新英骆晨周俊吉
Owner BEIJING CISRI GAONA TECH
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