Method for improving thermal deformation performance of titanium-based composite material

A titanium-based composite material and thermal deformation technology, which is applied in the field of improving the thermal deformation performance of titanium-based composite materials, can solve the problems of many deformation defects and high deformation resistance, and achieve reduced thermal deformation resistance, improved thermal deformation performance, and good application prospects Effect

Active Publication Date: 2021-06-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for improving the thermal deformation performance in order to solve the technical problems of high deformation resistance and many deformation defects of the existing TiB reinforced titanium matrix composite material thermal deformation

Method used

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  • Method for improving thermal deformation performance of titanium-based composite material
  • Method for improving thermal deformation performance of titanium-based composite material
  • Method for improving thermal deformation performance of titanium-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Use acetone and absolute ethanol to ultrasonically clean industrial titanium sponge in sequence, dry it in a drying oven at 100°C for 4 hours, and add TiB 2 Powder, TiB 2 The mass of the powder is 1.25% of the total mass of the composite material, and it is placed in a water-cooled crucible in a vacuum non-consumable electric arc furnace.

[0026] (2) Vacuuming to achieve a vacuum degree of 3×10 -3 After Pa, argon with a purity of 99.999% and hydrogen with a purity of 99.999% are introduced, and the flow ratio of hydrogen and argon is 2:3. After melting all the raw materials at a current of 150A, raise the current to 500A, keep the current constant, and stop the melting after 10 minutes. After the composite material is solidified and cooled, turn it upside down and place it upside down in a water-cooled copper crucible. Repeat the melting operation for a total of 6 melting times to obtain TiB Reinforced Ti-based composites.

Embodiment 2

[0028] The difference between this embodiment and embodiment 1 is: raw material sponge titanium, pure Mo particles and TiB 2 The powder mass is 62.25%, 33%, and 4.75% of the total mass of the composite material, and the rest of the operation steps are exactly the same as in Example 1 to obtain the TiB reinforced Ti-33Mo matrix composite material.

Embodiment 3

[0030] The difference between this embodiment and Example 1 is that the raw materials are titanium sponge, aluminum element and aluminum-vanadium master alloy; the quality of the aluminum-vanadium master alloy is weighed according to the mass ratio of vanadium element in the prepared composite material as 4%; The mass ratio in the prepared composite material is 6%, if the quality of the aluminum element in the aluminum-vanadium alloy does not meet the quality requirements of the composite material, it is supplemented with aluminum element; adding TiB 2 The powder mass is 2.5% of the total mass of the composite material, and the rest of the operation steps are exactly the same as in Example 1 to obtain a TiB-reinforced Ti-6Al-4V-based composite material, marked as composite material A.

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Abstract

The invention discloses a method for improving the thermal deformation performance of a titanium-based composite material, and belongs to the technical field of metal-based composite materials and preparation. The method solves the technical problems that an existing titanium-based composite material is high in thermal deformation resistance, multiple in deformation defect and the like. The method comprises the following steps that (1) raw materials for preparing the titanium-based composite material are pretreated, TiB2 powder is added, and the mixture is put into a water-cooled copper crucible; and (2) argon and hydrogen are introduced after vacuumizing is conducted, smelting is conducted, and the titanium-based composite material with the improved thermal deformability is obtained. According to the method, the thermal deformation resistance of the titanium-based composite material can be remarkably reduced, the peak stress is reduced, the deformation temperature under the same peak stress is reduced, the defects such as interface holes and deformation cracking hardly exist after deformation, and the thermal deformation performance of the material is greatly improved. In addition, the method has the advantages of economy, safety, novelty, reliability and the like, and has a good application prospect.

Description

technical field [0001] The invention relates to a method for improving the thermal deformation performance of a titanium-based composite material, and belongs to the technical field of metal-based composite materials and preparation. Background technique [0002] With the continuous development of the aerospace field, the demand for various aerospace structural parts with excellent performance is increasing. It has been difficult to apply, so the concept of titanium matrix composites was proposed, that is, a metal matrix composite formed by implanting some ceramic reinforcements into titanium alloys. This kind of composite material can inherit the ductility and toughness of titanium alloy, and has the properties of high strength and high modulus of ceramic reinforcement, so that the titanium matrix composite material has higher specific strength and specific modulus, and has excellent Comprehensive performance. [0003] The TiB whiskers in the TiB reinforced titanium matri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/02C22C1/03C22C14/00
CPCC22C1/1036C22C14/00C22C1/1047
Inventor 王亮颜卉姜博涛刘鸿灿王斌斌骆良顺苏彦庆郭景杰傅恒志
Owner HARBIN INST OF TECH
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