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Method for preparing in situ titanium-based composite material and part

An in-situ technology for titanium-based composite materials, which is applied in the field of preparation of in-situ titanium-based composite materials and their parts, can solve problems such as difficult to ensure uniform composition, affect the performance of composite materials and add reinforcements, and achieve no pollution at the interface, High temperature mechanical properties, the effect of producing fine particle size

Active Publication Date: 2012-03-21
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research group led by Professor Fraser of Ohio State University in the United States prepared TiB-reinforced composite materials by laser melting deposition of pure Ti powder, TC4 alloy powder and B powder. Ensure the uniformity of the composition (Banerjee R, et al. Laser deposition of in situ Ti-TiB composites, Advanced Engineering Materials, 2002, 4(11): 847-851; Direct laser deposition of in situ Ti-6Al-4V-TiB composites , Materials Science and Engineering A, 2003, 358: 343-349)
Wang F et al. used 5-50 mm TiB 2 TiB / Ti6Al4V composite materials were prepared by laser melting deposition method with Ti6Al4V powder below 300 mm, adding 5wt.%TiB 2 The room temperature tensile strength of the obtained TiB / Ti6Al4V is 1094 MPa, and it has good plasticity, and unmelted TiB is easy to exist in the material 2 Particles (Wang F et al. Direct laser fabrication of Ti6Al4V / TiB, Journal Mater Process Technol, 2008, 195(1-3): 321-326), the presence of unmelted additional particles affects the properties of composites (additional reinforcement internally prone to defects)

Method used

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  • Method for preparing in situ titanium-based composite material and part
  • Method for preparing in situ titanium-based composite material and part
  • Method for preparing in situ titanium-based composite material and part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of thin-walled Ti60+5.4wt.%TiC in-situ titanium-based composite material

[0024] Weigh a certain amount of Ti60 titanium alloy spherical powder (94.6wt.%) with a particle size of 38~250mm and TiC particles (5.4wt.%) of 2~3 mm and place them in a plastic bottle, and add zirconia balls 10 times the weight of the powder at the same time , mixed on an ordinary mixer for 8 hours, so that the fine TiC particles are completely embedded in the surface of the coarse-grained Ti60 titanium alloy powder, and the mixed powder is obtained. The shape of the mixed powder is as follows Picture 1-1 As shown, the mixed powder maintains a complete spherical shape and has good fluidity.

[0025] On the laser melting deposition system, the mixed powders transported synchronously by laser melting deposition are used to prepare thin-walled titanium-based composite materials in situ by layer-by-layer deposition. Under the action of the carrier gas, the mixed powder is s...

Embodiment 2

[0029] Embodiment 2: Preparation of TC4+9wt.%TiB 2 Thin-walled in situ titanium matrix composites

[0030] Weigh a certain amount of 38~250mm TC4 titanium alloy powder (91wt.%) and 2~4 mm TiB 2 Particles (9wt.%) were placed in a plastic bottle, and zirconia balls 20 times the weight of the powder were added at the same time, and mixed on a common mixer for 12 hours, so that the fine TiB 2 The particles are completely embedded in the surface of the coarse-grained TC4 titanium alloy powder to obtain a mixed powder. The morphology of the mixed powder is as follows diagram 2-1 As shown, the mixed powder maintains a complete spherical shape and has good fluidity.

[0031] On the laser melting deposition system, the mixed powders transported synchronously by laser melting deposition are used to prepare thin-walled titanium-based composite materials in situ by layer-by-layer deposition. Under the action of the carrier gas, the mixed powder is sent into the laser molten pool forme...

Embodiment 3

[0035] Embodiment 3: preparation TC11+ (3wt.%TiB 2+5.4wt.%TiC) thin-walled in-situ titanium-based composites

[0036] Weigh a certain amount of 38~250 mm TC11 titanium alloy powder (91.6wt.%) and 2~4 mm TiB 2 Granules (3wt.%) and 2~3 mm TiC particles (5.4wt.%) were placed in a plastic bottle, and zirconia balls 10 times the weight of the powder were added at the same time, and mixed on a common mixer for 12 hours to make the fine TiB 2 and TiC particles are completely embedded in the surface of the coarse-grained TC11 titanium alloy powder to obtain a mixed powder, which maintains a complete spherical shape and has good fluidity.

[0037] On the laser melting deposition system, the mixed powders transported synchronously by laser melting deposition are used to prepare thin-walled titanium-based composite materials in situ by layer-by-layer deposition. Under the action of the carrier gas, the mixed powder is sent into the laser molten pool formed by the high-power laser throu...

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Abstract

The invention relates to a method for preparing an in situ titanium-based composite material and a part, and belongs to the fields of metal-based composite materials and preparation thereof. The method comprises the following steps of: preparing mixed powder of titanium alloy powder and powder of one or two of TiB2 and TiC, and stacking the mixed powder subjected to laser smelting deposition and synchronous delivery layer by layer to directly prepare the in situ titanium-based composite material and the near net shape part thereof. By the method, the composition and the proportion of the enhanced phase of the titanium-based composite material can be flexibly controlled, the prepared material does not contain un-smelted additional powder granules, and the material has higher high-temperature mechanical property.

Description

technical field [0001] The invention discloses a method for preparing an in-situ titanium-based composite material and parts thereof, and belongs to the field of metal-based composite materials and their preparation and forming. Background technique [0002] Titanium-based composites can effectively improve the specific strength, specific stiffness, high-temperature creep performance and wear resistance of titanium alloys by adding a certain amount of high-performance fibers or reinforcement particles to the titanium alloy matrix, and significantly improve structural efficiency. It is the future 650 Key materials used at ℃ and higher temperatures. The application of continuous fiber-reinforced titanium-based composites is greatly limited due to the disadvantages of expensive fibers, complex processes, difficult forming, interface residual stress, interface reactions, and performance anisotropy. In recent years, the use of powder metallurgy to prepare isotropic ceramic parti...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C32/00C22C14/00
Inventor 张永忠石力开刘铭坤边隽杰袁国良赵新明
Owner 有研金属复材技术有限公司
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