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Solid-phase alloying method of aluminum-silicon powder under high-pressure condition

A solid-phase alloying and conditional technology, which is applied in the field of preparing high-density aluminum-silicon alloys, can solve problems such as difficult to meet the use requirements, large-scale production is difficult, and production restrictions, so as to improve interdiffusion ability, The effect of low cost and excellent performance

Inactive Publication Date: 2013-08-28
ZHUZHOU SMELTER GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using this method, the relative density of the produced silicon-aluminum alloy is generally below 97%, and some even only have about 90%, which is difficult to meet the use requirements.
Moreover, this production method must use special equipment and special technology with patent rights of Osprey Company, which is limited in production
[0007] In the production of aluminum-silicon alloys with the above processes, there are always some defects and limitations in alloy composition, process methods or production equipment, especially in large-scale production.

Method used

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  • Solid-phase alloying method of aluminum-silicon powder under high-pressure condition
  • Solid-phase alloying method of aluminum-silicon powder under high-pressure condition
  • Solid-phase alloying method of aluminum-silicon powder under high-pressure condition

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Aluminum powder with an average particle size of 7 μm and silicon powder with an average particle size of 50 μm are weighed and mixed according to the ratio of 10% aluminum powder and 90% silicon powder, and used as raw materials for later use. Put the mixture into the ball mill barrel of the ball mill mixer, fill the ball mill barrel with argon and seal it. The ball mill cylinder rotates three-dimensionally, the rotation speed is 60 times / min, and the ball mill mixing time is 60 minutes. Put the mixture of aluminum powder and silicon powder mixed by ball mill in a stainless steel container, place it in a vacuum heating furnace, and carry out vacuum heat treatment. The heat treatment temperature is 210°C, and the vacuum degree is greater than 6.67×10 -2 Pa, vacuum heat treatment time is 6h. The mixture of aluminum powder and silicon powder after vacuum treatment is put into a carbon steel steel sleeve with a diameter of 300mm in advance, and the powder is solid, and th...

Embodiment 2

[0037] Aluminum powder with an average particle size of 7 μm and silicon powder with an average particle size of 100 μm are weighed and mixed according to the ratio of 80% aluminum powder and 20% silicon powder, and used as raw materials for later use. Put the mixture into the ball mill barrel of the ball mill mixer, fill the ball mill barrel with argon and seal it. The ball mill cylinder rotates three-dimensionally, the rotation speed is 100 times / min, and the ball mill mixing time is 30 minutes. Put the mixture of aluminum powder and silicon powder mixed by ball mill in a stainless steel container, place it in a vacuum heating furnace, and carry out vacuum heat treatment. The heat treatment temperature is 190°C, and the vacuum degree is greater than 6.67×10 -2 Pa, the vacuum heat treatment time is 4h. Put the mixture of aluminum powder and silicon powder after vacuum treatment into a cylindrical carbon steel steel sleeve with a diameter of 100mm made in advance by carbon st...

Embodiment 3

[0039] Aluminum powder with an average particle size of 30 μm and silicon powder with an average particle size of 100 μm are weighed and mixed according to the ratio of 50% aluminum powder and 50% silicon powder, and used as raw materials for later use. Put the mixture into the ball mill barrel of the ball mill mixer, fill the ball mill barrel with argon and seal it. The ball mill cylinder rotates three-dimensionally, the rotation speed is 80 times / min, and the ball mill mixing time is 50 minutes. Put the mixture of aluminum powder and silicon powder mixed by ball mill in a stainless steel container, place it in a vacuum heating furnace, and carry out vacuum heat treatment. -2 Pa, vacuum heat treatment time is 5h. Put the mixture of aluminum powder and silicon powder after vacuum treatment into a carbon steel sleeve made of carbon steel in the shape of a 500×200×200mm cuboid in advance. The powder is solid, and the gas in the steel sleeve is degassed under vacuum conditions. ...

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Abstract

The invention discloses a solid-phase alloying method of aluminum-silicon powder under high-pressure condition. The applied aluminum-silicon alloy comprises the following components by weight percent: 10% to 80% of aluminum and the balance of silicon. Appropriate granularity proportion of aluminum powder and silicon powder is selected, the prepared aluminum powder and silicon powder are mixed together by using a rotational ball mill in the three-dimensional direction, are subsequently put into a vacuum heating furnace to be subjected to activation treatment, and are further put into a carbon steel sleeve to sinter under high pressure at a temperature lower than the melting point, the sintering time is controlled, and the alloying is realized depending on dispersion under the condition that the aluminum and the silicon are not molten. The solid-phase alloying method is an aluminum-silicon powder solid-phase alloying method that the process course is short, the cost is low and high-quality aluminum-silicon alloy can be obtained under high-pressure condition; and the prepared aluminum-silicon alloy can be widely applied to electronic device materials or functional coating materials.

Description

technical field [0001] The invention relates to a method for realizing alloying through solid-phase sintering lower than the melting temperature of aluminum powder and silicon powder after activation treatment under the action of high pressure, which can be applied to the preparation of high-density aluminum-silicon alloy. Background technique [0002] Aluminum-silicon alloy has the advantages of low density, high hardness, and good thermal conductivity. It can be widely used in a large number of fields such as wear-resistant piston materials, electronic packaging materials, and vacuum sputtering coating materials. Among aluminum-silicon alloys, alloys with a silicon content of about 12% to 25% can be used to prepare light-weight, high-strength, heat-resistant piston cylinder materials, and have practical applications in engine pistons such as motorcycles and automobiles. Aluminum-silicon alloys with a silicon content of 27% to 70% can be used to prepare electronic packaging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05
Inventor 余琨李鹏飞胡杰陈立三赵为上魏文武
Owner ZHUZHOU SMELTER GRP
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