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Thixotropic plasticity forming method of metal-based composite material

A composite material and plastic forming technology, applied in the direction of metal processing equipment, etc., can solve the complex and difficult forming process of metal matrix composite materials, achieve the effects of reducing energy consumption, improving product quality, and expanding application fields

Inactive Publication Date: 2011-09-21
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Metal matrix composites are composite materials with metal or alloy as the matrix and fibers, whiskers, particles, etc. as reinforcements. They have excellent properties such as high strength, high elastic modulus, wear resistance, and high temperature resistance. The forming process of composite materials is relatively complex and difficult

Method used

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  • Thixotropic plasticity forming method of metal-based composite material
  • Thixotropic plasticity forming method of metal-based composite material
  • Thixotropic plasticity forming method of metal-based composite material

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Experimental program
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Effect test

Embodiment 1

[0013] Preheat the mold to 280°C, and spray lubricant in the mold cavity for later use. At the same time, the semi-solid SiC with a solid phase rate of 93% obtained by isothermal heat treatment P / AZ61 magnesium-based composite material is kept at 15°C above the solidus line for 30 minutes, and the above-mentioned blank is machined into Φ50×17.5mm, placed in a preheated mold, and thixotropic plastic forming is performed in a hydraulic die forging press.

Embodiment 2

[0015] Preheat the mold to 295°C, and spray lubricant in the mold cavity for later use. At the same time, the semi-solid B4Cp / YII2 aluminum-based composite material obtained by mechanical stirring method with a solid phase rate of 88% was kept at 25°C above the solidus line for 16 minutes, and the above blank was machined into Φ50×17.5mm and placed in a preheated In-die, thixoplastic forming in a hydraulic die forging press.

[0016] figure 1 The CAD drawing of the parts selected for the present invention, it can be seen from the figure that the part structure is complex, and nine 9mm high claws need to be formed on the peripheral surface, and the center is a round table and an inner hexagonal hole. It is required that the surface has no obvious defects after forging, and the convex The tooth part is fully formed.

[0017] figure 2 For the composite gear parts obtained by thixotropic plastic forming in the present invention, it can be seen that the surface of the parts is ...

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Abstract

The invention relates to a thixotropic plasticity forming method of a metal-based composite material. The method is characterized by comprising the following steps of: preheating a die to 280-300 DEG C; spraying lubricant into the die; preserving the temperature of the metal-based composite material with high-solid-phase-rate semisolid texture characteristics at 10-25 DEG C above a solidus curve for 16-45 minutes; and then placing the metal-based composite material in the preheated die; and finally performing thixotropic plasticity forming in a die forging hydraulic press. By the method disclosed by the invention, the application field of the semisolid technology can be widened, the energy consumption can be reduced, the product quality can be improved, and the practicability progress of the semisolid forming technology can be promoted.

Description

technical field [0001] The invention relates to a method for thixotropic plastic forming of a metal matrix composite material. Background technique [0002] Metal matrix composites are composite materials with metal or alloy as the matrix and fibers, whiskers, particles, etc. as reinforcements. They have excellent properties such as high strength, high elastic modulus, wear resistance, and high temperature resistance. The forming process of composite materials is relatively complicated and difficult. Semi-solid forming technology is a new forming technology developed following liquid forming technology and solid forming technology. Compared with the former two commonly used molding techniques, the main difference is that the prefabricated semi-solid slurry with non-dendritic structure is injected into the mold and solidified under pressure. The advantage of this kind of forming is that the structure of the product is compact, the defects such as casting or forging are redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02
Inventor 闫洪胡志
Owner NANCHANG UNIV
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