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A kind of method of low-temperature sintering preparation containing mg aluminum alloy

A low-temperature sintering and aluminum alloy technology, which is applied in the field of aluminum alloy preparation, can solve the problems of low energy consumption, achieve low energy consumption, avoid Mg burning and equipment, and avoid Mg burning and equipment and environmental pollution.

Active Publication Date: 2016-04-27
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method effectively avoids the problems of Mg burning loss and equipment and environmental pollution in the conventional preparation process of Mg-containing aluminum alloys, and has the effects of low energy consumption and the ability to prepare complex parts in one time.

Method used

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  • A kind of method of low-temperature sintering preparation containing mg aluminum alloy
  • A kind of method of low-temperature sintering preparation containing mg aluminum alloy
  • A kind of method of low-temperature sintering preparation containing mg aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh the commercial MgH at a molar ratio of 2:3 2 The nanocrystalline second-phase precursor is obtained by ball milling mechanical alloying with Al micron powder in an argon-protected ball mill tank. Among them, the ball-to-material ratio during mechanical alloying is 20:1, the rotational speed of the ball mill is 400 rpm, and the ball milling time is 60 h. Depend on figure 2 (a) The X-ray diffraction pattern of the precursor can be obtained by combining the Scherrer formula. The alloyed precursor is composed of MgH with a grain size of about 15nm 2 and Al composition with a grain size of approximately 30 nm. Take by weighing 200 grams of Al micron powder, weigh the second-phase precursor of mechanically alloyed nanocrystals (i.e. 10 grams) by its weight ratio of 5%, add it to the Al powder, and place it in an argon-protected ball mill tank for ball milling and mixing. The ball-to-material ratio is 20:1, the speed of the ball mill is 200rpm, and the ball milling t...

Embodiment 2

[0028] Weigh the commercial MgH respectively according to the molar ratio of 2:1 2 The nanocrystalline second-phase precursor is obtained by ball-milling mechanical alloying with Cu micron powder in an argon-protected ball-mill jar. Among them, the ball-to-material ratio during mechanical alloying is 20:1, the rotational speed of the ball mill is 400 rpm, and the ball milling time is 60 h. Depend on figure 2 (b) The X-ray diffraction pattern of the precursor can be obtained by combining the Scherrer formula. The alloyed precursor is composed of MgH with a grain size of about 12nm2 and a Cu composition with a grain size of approximately 15 nm. Take by weighing 200 grams of Al micron powder, weigh the second-phase precursor of mechanically alloyed nanocrystals (i.e. 10 grams) by its weight ratio of 5%, add it to the Al powder, and place it in an argon-protected ball mill tank for ball milling and mixing. The ball-to-material ratio is 20:1, the speed of the ball mill is 200rpm...

Embodiment 3

[0030] Weigh the commercial MgH respectively according to the molar ratio of 2:1 2 The nanocrystalline second-phase precursor is obtained by ball-milling mechanical alloying with Ni micropowder in an argon-protected ball-mill jar. Among them, the ball-to-material ratio during mechanical alloying is 20:1, the rotational speed of the ball mill is 400 rpm, and the ball milling time is 60 h. Depend on figure 2 (c) The X-ray diffraction pattern of the precursor can be obtained by combining the Scherrer formula. The alloyed precursor is composed of Mg with a grain size of about 15nm 2 Composed of NiH and Ni with a grain size of approximately 20 nm. Take by weighing 200 grams of Al micron powder, weigh the second-phase precursor of mechanically alloyed nanocrystals (i.e. 10 grams) by its weight ratio of 5%, add it to the Al powder, and place it in an argon-protected ball mill tank for ball milling and mixing. The ball-to-material ratio is 20:1, the speed of the ball mill is 200rp...

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Abstract

The invention discloses a new method for preparing an aluminum alloy containing magnesium through low temperature sintering, and belongs to the technical field of aluminum alloy preparation. The preparation method comprises four steps: preparing a precursor of a second phase of a nanometer crystal, performing ball milling, mixing and preparing aluminum alloy powder containing magnesium, performing hot-pressing and sintering on aluminum alloy products at a low temperature, and demouding sintered aluminum alloy products. By the method, the problems of burning loss of the magnesium, equipment pollution, environment pollution and the like in the conventional preparation process of the aluminum alloy containing the magnesium are effectively solved, and at the same time, the method has the effects that the sintering temperature is low, and complex spare parts can be prepared at one step in a near shaping manner. The granules of the second phase in the aluminum alloy containing the magnesium, prepared by the method, are fine, and the dispersion enhancing effect is excellent, so that the obtained aluminum alloy products have a favorable comprehensive mechanical property.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy preparation, and in particular relates to a new method for preparing Mg-containing aluminum alloy by low-temperature hot-pressing sintering. Background technique [0002] Due to the advantages of high specific strength, good electrical conductivity, good corrosion resistance, low density, beautiful appearance, and moderate price, aluminum and its alloys are widely used in aerospace, navigation, packaging, civil construction, vehicle manufacturing and other industrial fields. It has become the most widely used metal material except steel materials. In order to improve the performance of aluminum alloys, the commonly used alloying elements include Mg, Cu, Ni, Si, Zn and rare earths. Among them, Al-Mg, Al-Mg-Cu, Al-Mg-Si and Al-Mg-Ni alloys are widely used. The conventional method of production of these alloys is the melting method. Due to the high vapor pressure of Mg, Mg will be burned du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04
Inventor 斯庭智韩路李永涛柳东明张庆安
Owner ANHUI UNIVERSITY OF TECHNOLOGY