Super-strong high-plastic titanium alloy and preparation method thereof

A technology of titanium alloy and high plasticity, applied in the field of super-strength and high-plastic titanium alloy and its preparation, can solve problems such as the inability to meet the needs of aircraft design and parts processing and manufacturing, so as to solve metallurgical problems, reduce smelting segregation, and improve material strength Effect

Active Publication Date: 2020-06-19
重庆金世利航空材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of aviation and weapon industries, titanium alloys with static mechanical properties and tensile strengths of ≤1200MPa can no longer meet the needs of aircraft design and parts processing and manufacturing. rate is basically ≤12%, and the reduction of area is basically ≤20%. Parts at this level of strength still use steel materials

Method used

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  • Super-strong high-plastic titanium alloy and preparation method thereof
  • Super-strong high-plastic titanium alloy and preparation method thereof
  • Super-strong high-plastic titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a super-strong high-plastic titanium alloy, comprising the following steps:

[0041] Step 1: Electrode preparation.

[0042] Select a quaternary alloy with a ratio of Al-Mo-Fe-Cr of 5.5:4.3:2.1:0.8, and the weight percentage ratio of each element in the electrode is: Al: 5.5%, Mo: 4.3%, Zr: 4.0%, Fe: 2.1% , Sn: 1.0%, Cr: 0.8%, O: 0.10%, the balance is Ti and trace impurities, impurity elements are less than 0.40% of the total weight. Take granular Al-Mo-Fe-Cr alloy, Ti-Sn alloy, Zr element, TiO 2 The powder and titanium sponge with a particle size of 0.83-25.4mm are mixed in proportion in the silo. The total weight of the mixture is 1t. Through continuous pressing, a monolithic electrode with a diameter of Φ400mm and no welding and a single weight of 1t is obtained.

[0043] Step 2: Ingot melting.

[0044] The vacuum consumable melting of the whole electrode was carried out three times in a vacuum consumable electric arc furnace using crucibles...

Embodiment 2

[0059] Step 1: Electrode preparation.

[0060] Select a quaternary alloy with a ratio of Al-Mo-Fe-Cr of 4.6:4.0:2.9:1.2, and the weight percentage ratio of each element in the electrode is: Al: 4.6%, Mo: 4.0%, Zr: 3.0%, Fe: 2.9% , Sn: 1.5%, Cr: 1.2%, O: 0.13%, the balance is Ti and trace impurities, impurity elements are less than 0.40% of the total weight. Take granular Al-Mo-Fe-Cr alloy, Ti-Sn alloy, Zr element, TiO 2 The powder and titanium sponge with a particle size of 0.83-25.4mm are mixed in proportion in the silo, the total weight of the mixture is 2t, and a monolithic electrode with a diameter of Φ430mm without welding and a single weight of 2t is obtained through continuous pressing.

[0061] Step 2: Ingot melting.

[0062] The overall electrode was smelted three times in a vacuum consumable electric arc furnace using crucibles with diameters of Φ560mm, Φ650mm, and Φ720mm in turn. The melting process parameters are shown in Table 4. The titanium alloy ingot is obt...

Embodiment 3

[0077] Step 1: Electrode preparation.

[0078] Select a quaternary alloy with a ratio of Al-Mo-Fe-Cr of 5.7:4.6:2.5:1.9, and the weight percentage ratio of each element in the electrode is: Al: 5.7%, Mo: 4.6%, Zr: 3.9%, Fe: 2.5% , Sn: 1.2%, Cr: 0.4%, O: 0.13%, the balance is Ti and trace impurities, impurity elements are less than 0.40% of the total weight. Take granular Al-Mo-Fe-Cr alloy, Ti-Sn alloy, Zr element, TiO 2 The powder and titanium sponge with a particle size of 0.83-25.4mm are mixed in proportion in the silo. The total weight of the mixture is 4t. Through continuous pressing, a monolithic electrode with a diameter of Φ460mm and a single weight of 4t without welding is obtained.

[0079] Step 2: Ingot melting.

[0080] The overall electrode was vacuum smelted three times in a vacuum consumable electric arc furnace using crucibles with diameters of Φ560mm, Φ650mm, and Φ720mm in turn. The melting process parameters are shown in Table 7. The titanium alloy ingot is...

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Abstract

The invention provides a super-strong high-plastic titanium alloy which comprises the following components in percentage by weight: 4.5 percent to 5.75 percent of Al, 3.0 percent to 5.0 percent of Mo,2.0 percent to 4.0 percent of Zr, 2.0 percent to 3.0 percent of Fe, 0.3 percent to 2.0 percent of Sn, 0.30 percent to 1.2 percent of Cr, less than or equal to 0.15 percent of O, and the balance Ti and trace impurities. The invention further provides a preparation method of the super-strong high-plastic titanium alloy. According to the super-strong high-plastic titanium alloy and the preparation method thereof provided by the invention, through simultaneously adding multiple multicomponent alloys, the tensile strength of the titanium alloy is improved to 1400MPa to 1550Mpa, meanwhile, the processing plasticity of the material is ensured, the elongation percentage is larger than 10 percent, and the reduction of cross sectional area is larger than 20 percent.

Description

technical field [0001] The invention is applied in the technical field of nonferrous metal processing, and in particular relates to a super-strong high-plastic titanium alloy and a preparation method thereof. Background technique [0002] With the development of aviation and weapon industries, titanium alloys with static mechanical properties and tensile strengths of ≤1200MPa can no longer meet the needs of aircraft design and parts processing and manufacturing. The rate is basically ≤12%, and the reduction of area is basically ≤20%. Steel materials are still used for parts at this strength level. The development of a super-strong high-plastic titanium alloy with a tensile strength of 1400MPa-1550MPa and high plasticity will greatly promote the development of my country's aviation and weapon design and manufacturing. Contents of the invention [0003] Aiming at the above problems in the prior art, the present invention provides a super-strong high-plastic titanium alloy a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/03C22F1/18
CPCC22C14/00C22C1/03C22F1/183
Inventor 田琳范炜张鹏王自伟李图志刘亮亮王永锋胡晓晨何英杰
Owner 重庆金世利航空材料有限公司
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