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A method for preparing magnesium-based composite materials by lost foam casting

A technology of lost foam casting and composite materials, used in casting molding equipment, molds, mold components, etc., can solve the problem of low product quality, reduce the time for adding particles, facilitate melt purification, and eliminate cold. Defect isolation effect

Active Publication Date: 2020-09-01
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lost foam casting is prone to casting defects such as slag inclusions, pores and cold shuts during the pouring process, and the product quality is not high

Method used

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  • A method for preparing magnesium-based composite materials by lost foam casting

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Embodiment Construction

[0018] Embodiments of the present invention are described in detail below. A method for preparing magnesium-based composite materials by lost foam casting, the method steps are:

[0019] ①. Preparation of pre-dispersed mixture of high-entropy alloy particles in magnesium alloy chips: put high-entropy alloy particles with a weight ratio of 1:1-2 and magnesium alloy chips with a size of 0.1-2 mm in a beaker of an electromagnetic stirrer, and place them under normal temperature conditions After electromagnetic stirring at 50-500r / min for 1-5h, then dry at 50-150°C for 1-5h to prepare a pre-dispersed mixture;

[0020] 2. Melt preparation: the pre-dispersed mixture prepared in step 1. is divided into two parts according to the weight ratio of 50%, wherein, 50% of the pre-dispersed mixture is put into the resistance furnace together with the magnesium alloy ingot, and the Furnace temperature 680-750 ℃ ​​and protective gas protection for smelting. After the magnesium alloy ingot is ...

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Abstract

The invention discloses a method for preparing a magnesium-based composite material by lost foam casting, and belongs to the technical field of manufacturing of metal-based composite materials. According to the method, thigh-entropy alloy particles are prepared by pre-dispersing a mixture in magnesium alloy scraps, and the pre-dispersed mixture and magnesium alloy ingots are subjected to melt preparation and lost foam casting through mixing, melting, rotating and stirring, spinning spraying and vertical-direction mechanical vibration to obtain the magnesium-based composite material prepared bylost foam casting. The vickers hardness and compressive strength of the material are increased, the friction coefficient is reduced, and the method has the advantages that the method is scientific and reasonable and the material has good performance.

Description

technical field [0001] The invention belongs to the preparation technology of metal-based composite materials, and mainly relates to a method for preparing magnesium-based composite materials by lost foam casting. Background technique [0002] Magnesium alloy is the structural material with the lowest density in production and application. It has the advantages of high specific strength, good damping and shock absorption performance, good castability and recyclability. It is more and more widely used in automobiles, electronic products and aerospace and other fields. However, the room temperature strength and plasticity of magnesium alloys are low, which limits the application of magnesium alloys to a large extent. Adding particle reinforcement phases inside magnesium alloys, such as ceramic particles SiC, has a higher melting point and hardness, which can improve the wear resistance and hardness of magnesium alloys, and is currently widely used. However, the ceramic parti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04B22D27/08C22C1/03C22C23/00
CPCB22C9/046B22D27/08C22C1/03C22C23/00
Inventor 陈永生孙晓梅汪隆兴徐斌梁维中齐凯王洋关升
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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