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Manufacturing method for high-copper-silicon magnesium powder metallurgy aluminum alloy

A powder metallurgy and aluminum alloy technology, which is applied to the preparation of high-silicon copper-magnesium powder metallurgy aluminum alloy materials, aluminum alloys and powder metallurgy fields, can solve the problems of low mechanical properties, high brittleness, poor temperature resistance, etc., and achieves the preparation method. Simple, high density, low cost effect

Active Publication Date: 2015-11-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problems of low mechanical properties, poor temperature resistance and high brittleness of high-silicon copper-magnesium aluminum alloys, the present invention provides a high-silicon copper alloy with simple production process, low cost, high mechanical properties at room temperature, good heat resistance and ductility. Preparation method of magnesium-based powder metallurgy aluminum alloy

Method used

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  • Manufacturing method for high-copper-silicon magnesium powder metallurgy aluminum alloy
  • Manufacturing method for high-copper-silicon magnesium powder metallurgy aluminum alloy
  • Manufacturing method for high-copper-silicon magnesium powder metallurgy aluminum alloy

Examples

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Embodiment 1

[0040] The high-silicon copper-magnesium-based aluminum alloy powder used in Example 1 includes the following components in terms of mass percentage:

[0041] Si17.5%;

[0042] Cu4.6%;

[0043] Mg0.6%;

[0044] The balance is Al and unavoidable impurities.

[0045] The particle size of the high-silicon copper-magnesium aluminum alloy powder in this embodiment is 150 microns.

[0046] The high-silicon copper-magnesium-based aluminum alloy powder was molded at room temperature (pressing pressure 200 MPa), the green compact was sintered at 480°C for 10 h, and the sintering atmosphere was high-purity nitrogen, and then the sintered billet was hot-extruded, and the hot-extrusion temperature was 390°C, the speed of hot extrusion is 1.0m / min; (the extrusion ratio is 10:1) the extruded profile is subjected to solution treatment, solid solution at 480°C for 12 hours, and water quenched at room temperature after being released from the furnace, and the quenching temperature is 20°C; ...

Embodiment 2

[0051] The high-silicon copper-magnesium-based aluminum alloy powder used in Example 2 includes the following components in terms of mass percentage:

[0052] Si23.0%;

[0053] Cu3.5%;

[0054] Mg1.0%;

[0055] The balance is Al and unavoidable impurities.

[0056] The particle size of the high-silicon copper-magnesium aluminum alloy powder in this embodiment is 80 microns.

[0057] The high-silicon copper-magnesium-based aluminum alloy powder was molded at room temperature, and the compact was vacuum sintered at 495°C for 8 hours at a vacuum degree of 0.001-0.1Pa, and then the sintered billet was hot-extruded (extrusion ratio 8:1). The extrusion temperature is 400°C, and the speed of hot extrusion is 0.8m / min; the extruded profile is subjected to solution treatment, solid solution at 490°C for 8 hours, and quenched in water at room temperature after being released from the furnace, and the quenching temperature is 30°C; the quenched aluminum alloy profile is immediately P...

Embodiment 3

[0062] Its raw material powder used is completely consistent with embodiment 1.

[0063] The high-silicon copper-magnesium-based aluminum alloy powder was molded at room temperature, and the compact was sintered at 510°C for 4 hours. The sintering atmosphere was high-purity argon, and then the sintered billet was hot-extruded. The speed is 0.3m / min (extrusion ratio 12:1); the extruded profile is subjected to solution treatment, solid solution at 510°C for 1 hour, and oil quenched at room temperature after being released from the furnace, and the quenching temperature is 80°C; the quenched aluminum alloy profile is immediately aged treatment and aging at 195°C for 4 hours to obtain a high-silicon copper-magnesium powder metallurgy aluminum alloy. , see the organization Image 6 . The room temperature tensile strength of the obtained finished product is 403 MPa, the Brinell hardness is 145, and the elongation is 9%. At 100℃, the tensile strength is 381MPa, the Brinell hardnes...

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Abstract

The invention relates to a manufacturing method for a high-copper-silicon magnesium powder metallurgy aluminum alloy, and belongs to the field of material forming with a traditional powder metallurgy forming-sintering process combined with aluminum alloy machining. The manufacturing method includes the steps that an aluminum alloy ingot blank is manufactured through indoor temperature pressing-sintering; then, the aluminum alloy ingot blank is subjected to hot extrusion to obtain an aluminum alloy section; the aluminum alloy section is subjected to solid-solution quenching treatment; and finally, the aluminum alloy section obtained after quenching treatment is subjected to aging treatment. The performance of the material is significantly improved through proper low-temperature sintering assisted by heat machining and heat treatment matched with the temperature of low-temperature sintering, and particularly, an unexpected effect on increase of elongation is achieved. The manufacturing process is simple, the obtained product is excellent in performance, and large-scale industrialized application is facilitated.

Description

technical field [0001] The invention relates to a method for preparing a high-silicon copper-magnesium powder metallurgy aluminum alloy material, and belongs to the technical field of aluminum alloy and powder metallurgy technology. Background technique [0002] With the increasing scarcity of global energy and the seriousness of environmental pollution, the lightweight of automobiles has attracted more and more attention. In recent years, the automobile industry has begun to use a large number of lightweight alloy materials (such as aluminum alloys, titanium alloys, etc.) to replace traditional steel materials. Especially in the engine transmission system, the light weight of parts can significantly improve the performance of the car. The use of aluminum alloy can reduce the weight of the car by more than 20%, save fuel by 12%-16%, and the effect of energy saving and emission reduction is obvious. Therefore, The application of aluminum alloy plays a very important role in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/04C22F1/043
Inventor 方华婵黄劲松
Owner CENT SOUTH UNIV
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