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Hydrogen permeating superplasticity processing method for in-situ synthesized titanium-based composite material

A titanium-based composite material, in-situ self-generating technology, applied in metal material coating technology, metal processing equipment, coating and other directions, can solve the problems of high superplastic temperature, increased cost, easy loss of molds, etc., to reduce superplasticity. Effects of processing temperature, extended service life, and extended application range

Inactive Publication Date: 2008-02-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] After searching the existing technical literature, it is found that the Chinese patent (application) number is 200410066211.1, and the patent name is the superplastic processing method of in-situ self-generated titanium-based composite materials. This patent utilizes ordinary superplastic processing methods to process composite materials. Although the process is simple, the optimal superplastic temperature is too high, even close to the phase transition point, the mold is easy to wear out, and the cost is greatly increased; and superplastic processing is performed at a lower temperature, the flow stress is large, and the elongation is not high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: Preparation of a titanium matrix composite member with 1% reinforcement

[0026] The TiB and TiC hybrid reinforced titanium matrix composite ingot was prepared by melting in a vacuum consumable electric arc furnace, the volume fraction of the reinforcement was 1%, and the volume ratio of TiB and TiC was 0.02. In order to ensure the uniformity of the material composition, it was melted twice; Open blank forging (1060°C) in the β-phase region, with a deformation of 50%, and then perform conventional forging in the α+β two-phase region (990°C), with a deformation of 120%, and use machining equipment to remove oxidation on the surface of the material Defects such as skin and shrinkage cavity, segregation and inclusions; then the composite material is placed in a vacuum furnace for high-temperature hydrogen permeation treatment, the hydrogen permeation temperature is 650°C, and the mass fraction of hydrogen is 0.1%; then the composite material is placed at 850°C a...

Embodiment 2

[0027] Example 2: Preparation of a titanium matrix composite component with 5% reinforcement

[0028] A TiB and TiC hybrid reinforced titanium matrix composite ingot was prepared by melting in a vacuum consumable electric arc furnace. The volume fraction of the reinforcement was 5%, and the volume ratio of TiB and TiC was 1. In order to ensure the uniformity of the material composition, it was smelted twice; Open blank forging (1080°C) in the β-phase region, with a deformation of 60%, and then perform conventional forging in the α+β two-phase region (1000°C), with a deformation of 80%, and use machining equipment to remove oxidation on the surface of the material Defects such as skin and shrinkage cavity, segregation and inclusions; then the composite material is placed in a vacuum furnace for high-temperature hydrogen permeation treatment, the hydrogen permeation temperature is 750°C, and the mass fraction of hydrogen is 0.5%; then the composite material is placed at 880°C an...

Embodiment 3

[0029] Example 3: Preparation of a titanium-based composite member with 10% reinforcement

[0030] The TiB and TiC hybrid reinforced titanium matrix composite ingot was prepared by vacuum consumable electric arc furnace melting, the reinforcement volume fraction was 10%, and the volume ratio of TiB and TiC was 50. In order to ensure the uniform composition of the material, it was smelted three times; Open billet forging (1100°C) in the β-phase region, with a deformation of 75%, and then perform conventional forging in the α+β two-phase region (1020°C), with a deformation of 75%, and use machining equipment to remove the scale on the surface of the material and defects such as shrinkage cavity, segregation and inclusion; then the composite material is placed in a vacuum furnace for high-temperature hydrogen permeation treatment, the hydrogen permeation temperature is 800°C, and the mass fraction of hydrogen is 0.7%; then the composite material is placed at 850°C and 1×10 -3 th...

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Abstract

The present invention relates to a hydrogen-permeating superplasticity processing method of in-situ autogenous titanium base composite material in the field of composite material technology. Said method includes the following steps: (1), utilizing vacuum consumable electroarc furnace to smelt and prepare titanium base composite material ingot containing TiB and TiC hybrid reinforcement; (2), in beta-phase zone breakdown forging the composite material ingot, then in alpha + beta two-phase zone making conventional forging operation, after the forging operation is completed, removing oxide skin and defects of piping, segregation and dirts, etc from material surface; (3), placing the composite material into a vacuum furnace and making hydrogen-permeating treatment; (4), contour forging or free forging the hydrogen-containing composite material, and making it into a component; and (5), placing said component into a vacuum annealing furnace and making vacuum hydrogen-removing treatment.

Description

technical field [0001] The invention relates to a processing method in the technical field of composite materials, specifically, a hydrogen permeable superplastic processing method for in-situ self-generated titanium-based composite materials. Background technique [0002] Due to its high specific strength, high specific modulus and high temperature resistance, particle-reinforced titanium-based composites are widely used in aerospace, advanced weapon systems and other fields. For example, the use of titanium-based composite materials can greatly reduce the weight of the car body, reduce fuel consumption, reduce exhaust pollution and reduce noise, etc., but due to the current preparation of titanium-based composite materials, especially the high cost of processing parts with complex shapes, it is greatly limited. Its application is not known, but it is only used in racing cars and limousines. Therefore, it is necessary to continue to reduce the cost of preparation and proce...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02C22F1/18C23C8/08C21D3/08B21J5/00
Inventor 吕维洁卢俊强覃继宁张荻
Owner SHANGHAI JIAO TONG UNIV
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