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Molten-metal-cladding hot isostatic pressing preparation method for particle-reinforced metal-matrix composite

A composite material, hot isostatic pressing technology, applied in the field of materials, can solve the problems of strong light and smoke, limited production efficiency, poor environmental friendliness, etc., to reduce production energy consumption and cost, simple production and assembly, breakthrough The effect of the simple structure of the shape

Active Publication Date: 2017-05-31
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to: when preparing particle reinforced metal matrix composites by the hot isostatic pressing process in the powder metallurgy method at present, it is necessary to make a sheath with good airtightness, and the process is complicated. The efficiency is limited, and during the welding process, strong light and smoke will be generated, and the environmental friendliness is poor. A method for preparing particle-reinforced metal matrix composites by molten metal coating hot isostatic pressing is provided.
As a new hot isostatic pressing method, the invention can effectively solve the problem that the traditional method needs to be sealed and welded, effectively simplifies the production process, improves production efficiency, and breaks through the bottleneck of production efficiency

Method used

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  • Molten-metal-cladding hot isostatic pressing preparation method for particle-reinforced metal-matrix composite
  • Molten-metal-cladding hot isostatic pressing preparation method for particle-reinforced metal-matrix composite
  • Molten-metal-cladding hot isostatic pressing preparation method for particle-reinforced metal-matrix composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Using 2024Al as the jacket material to prepare 35wt.%SiC p / 2024Al composite material, the specific steps are as follows.

[0059] 1. Mixing of raw materials: SiC ceramic particles and 2024Al alloy powder are uniformly mixed according to the designed composition ratio to obtain the first mixture.

[0060] 2. Cold isostatic pressing: put the first mixture into a cylindrical soft film mold, and cold-press the blank with a certain density, strength and shape by cold isostatic pressing.

[0061] 3. Production of sheathing: Select 2024Al thin plate as the sheathing material, bend it into a cylindrical surface, punch out the end surface of the cylinder, and use the cylindrical surface and the end surface of the cylinder as the sheathing.

[0062] 4. Assembly: Coat the inner surface of the package with BN release agent, then put the cylindrical cold compact blank prepared in step 2 into the package formed by splicing the cylindrical surface and the cylindrical end surface, an...

Embodiment 2

[0067] 20wt.%B was prepared by using 2024Al as the jacket material 4 C p / 6061Al composite material, the specific steps are as follows.

[0068] 1. Raw material mixing: mix B 4 The C particles and the 2024Al alloy powder are evenly mixed according to the designed composition ratio to obtain the first mixture.

[0069] 2. Cold isostatic pressing: put the first mixture into a cuboid soft film mold, and form a compacted plate with a certain density, strength and shape by cold isostatic pressing.

[0070] 3. Envelope production: select pure Al thin plate enveloping material, and wire-cut the six planes required for cuboid enveloping.

[0071] 4. Assembly: Coat the inner surface of the package with BN release agent, then put the cuboid compacted plate into the package made of six planes, and then put it into the graphite crucible.

[0072] 5. Hot isostatic pressing: Put the compacted plate, jacket and graphite crucible assembled in step 4 into the hot isostatic pressing furnace...

Embodiment 3

[0075] Cu is used as the sheath material to prepare 8wt%.Al 2 o 3 / Cu composite material, the specific steps are as follows.

[0076] 1. Raw material mixing: Al 2 o 3 The particles and the Cu powder are evenly mixed according to the designed composition ratio to obtain the first mixture.

[0077] 2. Cold isostatic pressing: put the first mixture into the soft film mold of the hemisphere, and press it into a green hemisphere with a certain density, strength and shape by cold isostatic pressing.

[0078] 3. Production of sheathing: select Cu metal block as sheathing material, use lathe to turn out hemispherical sheathing upper piece and circular sheathing lower piece, such as figure 1 shown.

[0079] 4. Assembly: Coat the inner surface of the package with graphite release agent, then put the hemispherical compacted hemisphere into the spliced ​​package, and then put it into the graphite crucible. Its structure is as follows figure 1 shown.

[0080] 5. Hot isostatic pressi...

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Abstract

The invention discloses a molten-metal-cladding hot isostatic pressing preparation method for a particle-reinforced metal-matrix composite, and aims at solving the problems that at present, when the particle-reinforce metal-matrix composite is prepared through the hot isostatic pressing process in the powder metallurgic method, a sheath good in leakproofness needs to be manufactured, procedures are complicated, generally, only blanks simple in shape can be prepared, the production efficiency is limited, strong light, smoke and the like can be generated in the welding process and environment friendliness is poor. The molten-metal-cladding hot isostatic pressing preparation method includes the four key steps of raw material mixing, cold isostatic pressing forming, assembling and hot isostatic pressing. As a new hot isostatic pressing method, the molten-metal-cladding hot isostatic pressing preparation method can effectively solve the problem that sheath sealing and welding need to be conducted in a traditional method, the production process is effectively simplified, the production efficiency is improved, and the bottleneck of the production efficiency is broken through. Meanwhile, the production energy consumption and cost can be effectively reduced while the material quality is ensured, and the molten-metal-cladding hot isostatic pressing preparation method is friendly to the environment, has high application value and is worthy of large-scale application and popularization.

Description

technical field [0001] The invention relates to the field of materials, in particular to the field of preparation of alloy materials, in particular to a method for preparing particle-reinforced metal-matrix composite materials by molten metal coating hot isostatic pressing. As a method for preparing particle-reinforced metal-based composite materials, the invention can effectively simplify the preparation process of alloy materials, shorten the production cycle, and has better effects and application prospects. Background technique [0002] Particle-reinforced metal matrix composites, as a relatively mature discontinuous phase-reinforced composite material, have excellent properties such as high specific modulus, high specific strength, high micro-yield strength, low expansion coefficient, and good wear resistance, and have been widely used. It is used in aerospace, weapon equipment, electronics and other industries, and has brought huge economic benefits. [0003] The UK w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/04B22F3/15C22C1/05
CPCB22F3/04B22F3/15B22F2003/153B22F2998/10C22C1/05B22F1/0003
Inventor 罗昊庞晓轩王伟刘炳刚蔡永军杨勇甘杰李强
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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