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A kind of preparation method of silicon carbide particle reinforced aluminum matrix composite material

A technology of silicon carbide particles and aluminum matrix reinforcement, which is applied in the field of aluminum matrix composite materials, can solve the problems of low density, achieve the effects of improving bonding, low cost, and refining matrix grains

Inactive Publication Date: 2015-09-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powder forgings with a density close to the theoretical density of the material can be produced, which overcomes the shortcomings of low density of ordinary powder metallurgy parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Step 1, prepare the mixed powder of aluminum powder and silicon carbide particles and put them in an agate ball mill jar, wherein the mass percentage of silicon carbide particles is 10%, after wet mixing on a planetary ball mill for 6 hours; Cold press molding, the resulting product is silicon carbide particle reinforced aluminum matrix composite green body. In order to reduce the friction between the blank and the cavity wall, liquid paraffin is evenly applied to the inner wall of the cavity before pressing.

[0015] Step 2: Sinter the obtained composite green body in a vacuum furnace at 570 °C and keep it warm for 3 hours, then cool down with the furnace.

[0016] Step 3: Free forging the obtained composite billet on an air hammer, the forging temperature is selected between 350°C and 400°C, and the temperature of the sample is measured with an instrument equipped with infrared temperature measurement. During the forging process, when the billet temperature drops to ...

Embodiment 2

[0021] Step 1: Prepare the mixed powder of aluminum powder and silicon carbide particles and put them in an agate ball mill jar, wherein the mass percentage of silicon carbide particles is 20%; after wet mixing on a planetary ball mill for 6 hours, cold press in a mold under a pressure of 500 MPa The resulting product is a silicon carbide particle-reinforced aluminum-based composite green body. In order to reduce the friction between the blank and the cavity wall, liquid paraffin is evenly applied to the inner wall of the cavity before pressing.

[0022] Step 2: Sinter the obtained composite body in a vacuum furnace at 570 °C and keep it warm for 3 h, then cool down with the furnace.

[0023] Step 3: Free forging the obtained composite billet on an air hammer, the forging temperature is selected between 350°C and 400°C, and the temperature of the sample is measured by an instrument equipped with infrared temperature measurement. During the forging process, when the billet tem...

Embodiment 3

[0028] Step 1, prepare the mixed powder of aluminum powder and silicon carbide particle powder and put it in an agate ball mill jar, wherein the mass percentage of silicon carbide particle powder is 30%; after wet mixing on a planetary ball mill for 6 hours, cold press molding in a mold under a pressure of 500 MPa , the resulting product is silicon carbide particles reinforced aluminum matrix composite green body. In order to reduce the friction between the blank and the cavity wall, liquid paraffin is evenly applied to the inner wall of the cavity before pressing.

[0029] Step 2: Sinter the obtained composite body in a vacuum furnace at 570 °C and keep it warm for 3 h, then cool down with the furnace.

[0030] Step 3: Free forging the obtained composite billet on an air hammer, the forging temperature is selected between 350°C and 400°C, and the temperature of the sample is measured by an instrument equipped with infrared temperature measurement. During the forging process,...

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PUM

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Abstract

The invention relates to the field of aluminum-based composite materials, and particularly relates to a preparation method of a silicon carbide granule reinforced aluminum-based composite material, and the preparation method comprises the following steps: performing wet mixing on aluminum powder and silicon carbide mixed powder in a ball mill, wherein the mass percent of the silicon carbide is 10-30%, and vacuum protection is performed in the mixing process; performing cold press molding in a mold at a pressing pressure of 500 MPa; performing pressureless sintering at 570 DEG C under vacuum conditions; performing open forging on an air hammer, wherein the final forging deformation amount is 50%; performing recrystallization annealing at 360 DEG C under vacuum conditions for 2 hours. According to the invention, the property of the aluminum-based composite material is effectively enhanced; the process provided by the invention is simple, low in cost and suitable for industrial application.

Description

technical field [0001] The invention relates to the field of aluminum-based composite materials, in particular to a method for preparing silicon carbide particle-reinforced aluminum-based composite materials. Background technique [0002] Aluminum matrix composites have a long history of research at home and abroad, because of their important application background in aviation and aerospace, they have been widely valued. Compared with traditional aluminum-based materials, aluminum-based composites have the advantages of light weight, high specific strength, good mechanical properties, and low thermal expansion coefficient. Compared with continuous reinforced composite materials, due to the technical and cost problems in the preparation of continuous reinforced aluminum matrix composites, discontinuous reinforced aluminum matrix composites have become the leading research direction, and its reinforcements mainly include SiC whiskers, borate whiskers, SiC particles, B4C parti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C32/00C22C21/00
Inventor 杨琳乔力
Owner TAIYUAN UNIV OF TECH
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