Superplastic discontinuous reinforced titanium-based composite material and superplastic forming method thereof

A titanium-based composite material and superplastic technology, which is applied in heat treatment equipment, manufacturing tools, heat treatment process control, etc., can solve the problems of poor plastic forming ability of titanium-based composite materials, limited superplastic deformation ability, and increased superplastic forming cost. , to achieve the effect of reducing processing cost, reducing energy consumption, and saving thermal processing procedures

Active Publication Date: 2022-03-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the α-phase of titanium belongs to the close-packed hexagonal structure, the plastic deformation ability is poor, and the hard ceramic particles that cannot be deformed further limit the plastic deformation ability of the material, so that the plastic forming ability of the titanium matrix composite is poor, and its superplasticity Limited deformability and harsh deformation conditions
[0004] At present, the superplastic forming method of discontinuously reinforced titanium matrix composites has high requirements on the deformation temperature. Usually, the deformation temperature is set within a range of about 50 °C lower than the β transformation temperature, resulting in high energy consumption costs and equipment requirements. It is also relatively high; and before superplastic forming, it is generally necessary to perform complex pretreatment steps such as multi-process, multi-pass, and large-deformation two-phase zone plastic deformation on raw materials, which further increases the cost of superplastic forming

Method used

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  • Superplastic discontinuous reinforced titanium-based composite material and superplastic forming method thereof
  • Superplastic discontinuous reinforced titanium-based composite material and superplastic forming method thereof
  • Superplastic discontinuous reinforced titanium-based composite material and superplastic forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] (1) Preparation of TA15(Si) titanium-based composite material containing 3.5vol.% TiBw reinforcement:

[0091] TA15 powder, titanium diboride powder and silicon powder (the mass ratio of the three is 98:2:0.3) are prepared by powder metallurgy to obtain discontinuously reinforced titanium matrix composites;

[0092] (2) Place the discontinuously reinforced titanium-based composite material obtained in step (1) at 1050°C and keep it warm for 30 minutes, and then air-cool it to room temperature (25°C) at a rate of 10°C / s to obtain a material with a uniform structure;

[0093] Then place the homogeneous texture material at 910°C for unidirectional forging with a deformation of 75%, and then cool it to room temperature (25°C) with the furnace at a rate of 7°C / min to obtain a heat-treated green body;

[0094] (3) The heat-treated green body obtained in step (2) is sample-prepared, and each sample prepared is respectively placed under the deformation temperature and deformati...

Embodiment 2

[0096] (1) Preparation of TA15(Si) titanium-based composite material containing 3.5vol.% TiBw reinforcement:

[0097] TA15 powder, titanium diboride powder and silicon powder (the mass ratio of the three is 98:2:0.3) are prepared by powder metallurgy to obtain discontinuously reinforced titanium matrix composites;

[0098] (2) Place the discontinuously reinforced titanium-based composite material obtained in step (1) at 1050°C and keep it warm for 30 minutes, and then air-cool it to room temperature (25°C) at a rate of 10°C / s to obtain a material with a uniform structure;

[0099] Then place the material with uniform structure at 910°C for unidirectional forging with a deformation of 75%, and then cool it to room temperature (25°C) with the furnace at a rate of 7°C / min to obtain a typical structure after heat treatment;

[0100] Then place the heat-treated typical structure at 980°C and keep it warm for 0.5h, and then air-cool to room temperature (25°C) at a rate of 7°C / s to o...

Embodiment 3

[0103] (1) Preparation of TA15(Si) titanium-based composite material containing 2vol.% TiBw reinforcement:

[0104] TA15 powder, titanium diboride powder and silicon powder (the mass ratio of the three is 98.8:1.2:0.5) are prepared by powder metallurgy to obtain discontinuously reinforced titanium-based composite materials;

[0105] (2) Place the discontinuously reinforced titanium-based composite material obtained in step (1) at 1060°C and keep it warm for 30 minutes, and then air-cool it to room temperature (25°C) at a rate of 10°C / s to obtain a material with a uniform structure;

[0106] Then place the material with uniform structure at 930°C for unidirectional forging with a deformation of 75%, and then cool it to room temperature (25°C) with the furnace at a rate of 7°C / min to obtain a typical structure after heat treatment;

[0107] Then place the heat-treated typical structure at 1010°C and keep it warm for 0.5h, and then air-cool it to room temperature (25°C) at a rate...

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Abstract

The invention provides a superplastic discontinuous reinforced titanium-based composite material and a superplastic forming method thereof. The superplastic forming method comprises the following steps: (1) preparing a discontinuous reinforced titanium-based composite material from titanium powder, titanium diboride powder and silicon powder by adopting a powder metallurgy method; (2) carrying out homogenization heat treatment and thermal deformation treatment on the non-continuous reinforced titanium-based composite material in sequence to obtain a heat-treated green body; and (3) the heat treatment blank is subjected to superplastic forming, and the superplastic discontinuous reinforced titanium-based composite material is obtained. According to the superplastic forming method provided by the invention, the pretreatment steps of the titanium-based composite material can be reduced, the superplastic deformation cost is reduced, meanwhile, the superplastic deformation temperature of the titanium-based composite material is reduced, the superplastic deformation rate of the titanium-based composite material is increased, and the superplastic discontinuous reinforced titanium-based composite material with better superplastic deformation capacity is obtained.

Description

technical field [0001] The invention relates to the technical field of superplastic forming, in particular to a superplastic discontinuously reinforced titanium-based composite material and a superplastic forming method thereof. Background technique [0002] Superplasticity refers to the phenomenon that the material has more than 100% tensile deformation capacity at a certain temperature and deformation rate. Superplastic processing refers to the processing method of using the superplasticity of the material to perform large plastic deformation on the material at high temperature. Utilizing the superplasticity of metal materials, large-scale plate-shaped or shell-shaped complex components with no joints, no connectors, excellent forming accuracy, and good surface quality can be prepared by means of inflatable molding. Since there are no welds, screws, pins and other connectors in the structure, the use of superplastic forming methods to process components can also greatly re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C14/00B22F3/14C22F1/18C21D11/00B21J5/00
CPCC22C1/05C22C14/00B22F3/14C22F1/183C22F1/002C21D11/005B21J5/002
Inventor 黄陆军张芮安琦王帅陈昕孙枫泊陈润耿林
Owner HARBIN INST OF TECH
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