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Method for preparing metal-matrix composite material by using recovering scrap metal through semi-solid state technology

A composite material and metal-based technology, which is applied in the field of preparing graphene-reinforced magnesium-based composite materials, can solve the problems of uneven dispersion of the reinforced phase, environmental pollution, poor bonding between the reinforced phase and the metal matrix interface, etc., and achieve good spheroidization effect, Composite and enhance interfacial bonding, beneficial effect of wetting

Inactive Publication Date: 2018-05-15
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first object of the present invention is to provide a method for preparing metal matrix composites by reclaiming metal scraps using a semi-solid process, so as to solve the problems of uneven dispersion of the reinforcing phase and poor bonding between the reinforcing phase and the metal matrix interface in the existing method and easy to cause The problem of environmental pollution, the method of using the semi-solid process to recycle metal scraps to prepare metal matrix composites, the enhanced phase-metal scraps mixed solution is ultrasonically dispersed and mechanically stirred CO 2 Atmosphere drying combined with semi-solid isothermal treatment to obtain a metal matrix composite material with a reinforcing phase coated with metal shavings. The preparation method of the metal matrix composite material prepared by ultrasonic dispersion and mechanical stirring combined with semi-solid extrusion is simple. In the method, after the semi-solid isothermal treatment, a fine semi-solid structure with good spheroidization effect can be obtained, which is conducive to the infiltration, compounding and interface bonding of the matrix and the reinforcing phase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) add 0.18g graphene in the analysis alcohol of 150ml, 99.99%, utilize ultrasonic dispersion treatment 20min, make graphene disperse evenly, after processing, pure 59.82gAZ91D magnesium alloy chips are added in gained graphene alcohol solution, machine Stir (400rm / min) and ultrasonically disperse for 40 minutes at the same time, so that the AZ91D magnesium alloy chips and graphene are evenly mixed without layered precipitation;

[0049] (2) After filtering the mixed solution of graphene-AZ91D magnesium alloy chips prepared in the previous step, place it in CO 2 Dry in an atmosphere drying oven (RT+10°C) to obtain flaky graphene-reinforced AZ91D magnesium alloy composites;

[0050] (3) Put the crumb-shaped graphene-reinforced AZ91D magnesium alloy composite material in the mold, and move the mold equipped with the crumb-like graphene-reinforced AZ91D magnesium alloy composite material into the heating furnace, preheat to 300°C together, and keep warm for 10min , and t...

Embodiment 2

[0054] (1) Add 0.4gAl to 100ml, 99.99% analysis 2 o 3 (1μm), using ultrasonic dispersion for 20min to make Al 2 o 3 Evenly dispersed, after treatment, 59.6g of pure AZ31 magnesium alloy scraps were added to the obtained Al 2 o 3 In the alcohol solution, mechanically stir (500rm / min) and ultrasonically disperse for 60min at the same time, so that the AZ31 magnesium alloy chips and Al2O3 are evenly mixed without layered precipitation; the alcohol is 99.99% analytical alcohol;

[0055] (2) the Al obtained in the previous step 2 o 3 / AZ31 magnesium alloy chip mixed solution is filtered and placed in CO 2 Dry in an atmosphere drying oven (RT+10°C) to obtain scrap metal matrix composites;

[0056] (3) Chipping Al 2 o 3 Reinforced AZ31 magnesium alloy matrix composites are placed in the mold and filled with chip-like Al 2 o 3 The mold of the reinforced AZ31 magnesium alloy matrix composite material was moved to the heating furnace, preheated to 280°C together, kept for 20 ...

Embodiment 3

[0060] (1) Add 0.4gAl to 100ml, 99.99% analysis 2 o 3 (1μm), using ultrasonic dispersion for 20min to make Al 2 o 3 Evenly dispersed, after treatment, 59.6g of pure AZ31 magnesium alloy scraps were added to the obtained Al 2 o 3 In the alcohol solution, mechanical stirring (450rm / min) and ultrasonic dispersion for 80min at the same time make AZ31 magnesium alloy chips and Al 2 o 3 Mix evenly without stratification and precipitation; the alcohol is 99.99% analytical alcohol;

[0061] (2) the Al obtained in the previous step 2 o 3 / AZ31 magnesium alloy chip mixed solution is filtered and placed in CO 2 Dry in an atmosphere drying oven (RT+10°C) to obtain scrap metal matrix composites;

[0062] (3) Chipping Al 2 o 3 Reinforced AZ31 magnesium alloy matrix composites are placed in the mold and filled with chip-like Al 2 o 3 The mold of the reinforced AZ31 magnesium alloy-based composite material was moved to the heating furnace, preheated to 250°C together, kept for 5 ...

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Abstract

The invention provides a method for preparing a metal-matrix composite material by using recovering scrap metal through a semi-solid state technology. The method for preparing the metal-matrix composite material by using the recovering scrap metal through the semi-solid state technology is adopted, a reinforced phase-metal sweeping mixed solution is used for conducting ultrasonic dispersion and mechanical stirring, then CO2 atmosphere during is carried out, and the reinforced phase wrapping metal sweeping metal-matrix composite material is obtained in cooperation with semi-solid state isothermal treatment. Compared with a traditional method for preparing the metal-matrix composite material through powder metallurgy, the method for preparing the metal-matrix composite material in cooperation with ultrasonic dispersion mechanical stirring and semi-solid state extrusion is simple in process, meanwhile, in the composite material preparing method, wee semi-solid state textures with the goodballing effect can be obtained after semi-solid state isothermal treatment, and wetting, compounding and interface bonding promoting of a matrix and a reinforced phase are facilitated.

Description

technical field [0001] The invention relates to the technical field of material preparation, specifically, a method for preparing metal-based composite materials by recycling metal scraps by using a semi-solid process, in particular, a method for preparing graphene-reinforced magnesium-based composite materials by using AZ91 magnesium alloy scraps Methods. Background technique [0002] With the continuous increase of metal consumption in our country, the waste of resources and environmental pollution caused by metal waste discarded in metallurgical industry, metal processing industry and daily life are becoming more and more serious, so the recycling of scrap metal has important social and economic benefits for alleviating resource shortage. The existing recycling method of metal scrap is mainly smelting, but in the process of smelting, the burning loss of metal is an inevitable problem, which increases the difficulty of metal batching and increases the cost of alloy product...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C23/00C22C32/00C22C47/14C22C49/04C22C101/10C22C101/04
CPCC22C1/05C22C23/00C22C32/0036C22C32/0084C22C47/14C22C49/04
Inventor 许红雨杨钊胡茂良王晔吉泽升赵春芳常昊
Owner HARBIN UNIV OF SCI & TECH
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