Processing and manufacturing method of novel double-state-structure titanium-based composite material

A titanium-based composite material, processing and manufacturing technology, applied in the field of processing and manufacturing of new dual-state titanium-based composite materials, can solve problems such as poor plasticity and mechanical properties, and achieve simplified thermal processing technology, high strength and fatigue performance, The effect of good tensile plasticity and fatigue strength

Active Publication Date: 2021-12-31
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the preparation of titanium matrix composites by powder metallurgy has the characteristics of uniform structure, simple process and high material utilization rate, the mechanical properties are greatly affected by the inevitable defects such as pores.
The matrix structure of titanium-based composites prepared by powder metallurgy is usually a basket structure, which has high strength, but poor plasticity, and cannot well adapt to the current complex service environment.

Method used

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  • Processing and manufacturing method of novel double-state-structure titanium-based composite material
  • Processing and manufacturing method of novel double-state-structure titanium-based composite material
  • Processing and manufacturing method of novel double-state-structure titanium-based composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] After mixing, the powder is sintered under the condition of 1400℃ / 30Mpa / 2h. The composition weight percentage of the composite material is Al: 6.20%, Mo: 3.8%, Zr: 4.10%, Sn: 1.80%, W: 1.20%, Si: 0.50%. , B: 1.00%, the balance is Ti and other unavoidable impurity elements, and the β-transition transition temperature of the alloy detected by metallographic method is 990°C. Such as Figure 1 As shown, there are unavoidable defects such as pores in the sintered composites.

[0024] The sintered composite material at T β After heat preservation at +30°C for one hour, carry out hot pressing deformation, the deformation amount is 50%, and the tissue is densified after thermal deformation; β Heat treatment at +10°C, keep warm for 2 hours after heat penetration, and then slowly cool at a rate of 0.5°C / S; at T β Carry out the second heat treatment at -30°C, heat thoroughly and keep warm for 2 hours, then air cool; finally, carry out aging treatment at 550°C, keep warm for 12 ...

Embodiment 2

[0026] After mixing, the powder is sintered under the condition of 1300℃ / 50Mpa / 2h, and the composition weight percentage of the composite material is Al: 6.50%, Mo: 4.00%, Zr: 3.60%, Sn: 2.30%, W: 1.00%, Si: 0.30% , B: 1.50%, the balance is Ti and other unavoidable impurity elements, and the β-transition transition temperature of the alloy detected by metallographic method is 995°C. Such as Figure 1 As shown, there are unavoidable defects such as pores in the sintered composites.

[0027] The sintered composite material at T β After heat preservation at +10°C for one hour, carry out hot pressing deformation, the deformation amount is 50%, and the tissue is densified after thermal deformation; β Heat treatment at -10°C, keep warm for 2 hours after heat penetration, and then slowly cool at a rate of 1°C / S; at T β Carry out the second heat treatment at -30°C, after heat penetration, heat preservation for 2 hours, and then oil cooling; finally, aging treatment at 600°C, heat p...

Embodiment 3

[0029] After mixing, the powder is sintered under the condition of 1500℃ / 50Mpa / 2h. The composition weight percentage of the composite material is Al: 6.00%, Mo: 3.60%, Zr: 4.30%, Sn: 1.50%, W: 1.50%, Si: 0.50% , B: 2.00%, the balance is Ti and other unavoidable impurity elements, and the metallographic method detects that the β-transition transition temperature of the alloy is 1000°C. Such as Figure 1 As shown, there are unavoidable defects such as pores in the sintered composites.

[0030] The sintered composite material at T β +20℃ for one hour after hot pressing deformation, the deformation amount is 50%, and the tissue is densified after thermal deformation; then at T β Heat treatment at -20°C, keep warm for 2 hours after heat penetration, and then slowly cool at a rate of 1.5°C / S; at T β Carry out the second heat treatment at -50°C, after heat penetration, heat preservation for 2 hours, and then oil cooling; finally, aging treatment at 600°C, heat preservation for 24 ...

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Abstract

The invention relates to a processing and manufacturing method of a novel double-state-structure titanium-based composite material. The novel double-state-structure titanium-based composite material is subjected to thermal deformation only through a beta-phase region, so that the composite material can be densified, and the effect of refining grains is achieved; the problems of unavoidable defects such as pores in powder metallurgy are solved to a great extent; after beta-phase region thermal deformation, a double-state structure can be directly obtained through subsequent thermal treatment, and alpha + beta two-phase region complex thermal deformation needed by traditional titanium alloy is avoided; and the double-state structure can be obtained only through subsequent heat treatment, so that the hot working process is enlarged and simplified. The novel double-state-structure titanium-based composite material not only has high strength and fatigue performance of a lamellar structure, but also has good tensile plasticity and fatigue strength brought by an equiaxed structure, and can better meet the requirements of current complex service conditions in the fields of aviation, spaceflight and the like.

Description

technical field [0001] The invention belongs to the field of titanium-based composite materials, and in particular relates to a processing and manufacturing method for a novel two-state structure titanium-based composite material. Background technique [0002] Titanium alloys are widely used in aviation, aerospace and other fields because of their low density, high specific strength, good corrosion resistance and high temperature performance. With the rapid development of modern science and technology, higher requirements are put forward for the high temperature performance of structural materials used in aviation and aerospace. Traditional solid solution strengthened titanium alloys cannot meet the further needs of modern aviation, aerospace and other industries. In order to make titanium alloys have high strength and high toughness while maintaining good plasticity and processing properties, discontinuously reinforced titanium-based alloy materials have become an importan...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C14/00C22F1/18
CPCC22C1/0458C22C14/00C22F1/183
Inventor 赵子博孙昊王清江
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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