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Forging technology of particle-reinforced aluminum-based composite material

A particle-reinforced aluminum and composite material technology, which is applied in metal processing equipment and other directions, can solve the problems of uneven deformation of blanks, unfavorable forging structure and mechanical properties stability, affecting the distribution of ceramic particles in forgings, etc., to improve yield strength and resistance. Tensile strength, the effect of improving distribution

Active Publication Date: 2011-08-17
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

[0004] For shaft and rod parts, the hot extrusion process is usually used to extrude the composite billet into a rod or tube blank. The large deformation during the extrusion process is very conducive to the uniform distribution of ceramic particles; however, for disks, For cake-shaped parts, only the forging and upsetting process can be considered to form the composite billet into discs and cakes.
However, unlike the hot extrusion process, during the forging and upsetting process, due to the friction between the flat anvil and the billet, the side surface of the billet will form a drum shape, resulting in uneven deformation of the billet as a whole, thus affecting the ceramic particles in each part of the forging. The distribution of the forging is not conducive to the stability of the structure and mechanical properties of the forging

Method used

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  • Forging technology of particle-reinforced aluminum-based composite material
  • Forging technology of particle-reinforced aluminum-based composite material
  • Forging technology of particle-reinforced aluminum-based composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The experimental material of this embodiment is 5vol.% SiC prepared by powder metallurgy p / 2009Al composite material, the size of the composite material forging blank is Φ120×200mm. Specific implementation method: in the first step, the forging blanks (4 in total, numbered 1 # ,2 # 、3 # and 4 # ) hot-fit the sheath, the material of the sheath is No. 45 steel, and the wall thickness is 15mm; the second step is to heat the billet to 300°C, and the holding time is t=6h; the third step is to carry out free forging under the billet, and the deformation They are 10%, 25%, 50% and 70% respectively; the fourth step, after the 4 forgings are air-cooled, they are covered with car covers and flat end faces.

Embodiment 2

[0025] The experimental material of this embodiment is 20vol.% SiC prepared by powder metallurgy p / 2009Al composite material, the size of the composite material forging blank is Φ80×150mm. Specific implementation method: the first step, the forging blank (total 4, numbered 5 # 、6 # 、7 # and 8 # ) hot-fit the sheath, the material of the sheath is No. 45 steel, and the wall thickness is 10mm; the second step is to heat the billet to 350°C, and the holding time is t=2h; the third step is to carry out free forging under the billet, and the deformation They are 10%, 25%, 50% and 70% respectively; the fourth step, after the 4 forgings are air-cooled, they are covered with car covers and flat end faces.

Embodiment 3

[0027] The experimental material of this embodiment is 35vol.% SiC prepared by powder metallurgy p / 2009Al composite material, the size of the composite material forging blank is Φ50×100mm. Specific implementation method: the first step, the forging blanks (4 in total, numbered 9 # 、10 # 、11 # and 12 # ) hot-fit the sheath, the material of the sheath is No. 45 steel, and the wall thickness is 5mm; the second step is to heat the billet to 400°C, and the holding time is t=2h; the third step is to carry out free forging under the billet, and the deformation They are 10%, 25%, 50% and 70% respectively; the fourth step, after the 4 forgings are air-cooled, they are covered with car covers and flat end faces.

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Abstract

The invention relates to a forging technology of a particle-reinforced aluminum-based composite material, which is characterized in that the distribution of ceramic particle bodies and the mechanical property of the composite material can be improved through large deformation of forging. Forging billets are packaged in a hot charging way and then placed into a resistance furnace or a fuel furnacefor heating; the temperature is preserved at 300-400DEG C and the temperature preservation time t is determined by the maximum diameter delta max; in such a way that: when the delta max is not more than 100mm, t is equal to 2h; when the delta max is more than 100mm and less than 500mm, t is equal to 6h; and when the delta max is not less than 500mm, t is 10h. When in forging, the deformation amount of a single path is 10-70 percent. After the forging is finished, forging pieces are subject to air cooling, the sheaths are turned and end faces are flattened.

Description

technical field [0001] The invention belongs to the technical field of particle-reinforced aluminum-based composite materials; in particular, it relates to a forging process of ceramic particle-reinforced aluminum-based composite materials. Background technique [0002] Particle-reinforced aluminum matrix composites have excellent comprehensive properties such as high specific strength and specific stiffness, fatigue resistance, good thermal conductivity, small thermal expansion coefficient, and good dimensional stability. They have broad application prospects as structural materials in the aerospace field. A large number of studies have shown that mechanical properties such as strength and plasticity, which have received much attention as structural materials, are seriously affected by the uniformity of ceramic particle distribution, and different plastic forming methods will directly affect the distribution of ceramic particles. Therefore, for composite parts with differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/06
Inventor 魏少华樊建中马自力左涛刘彦强
Owner 有研金属复材技术有限公司