Preparation method for lost foam casting of high-entropy alloy particle-reinforced magnesium-based composite material

A technology of lost foam casting and high-entropy alloys, which is applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of poor strength of magnesium alloy waste and achieve the effects of improving product performance, changing growth orientation, and changing solidification speed Effect

Pending Publication Date: 2020-09-29
哈尔滨吉星机械工程有限公司 +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems that the proportion of magnesium alloy waste added in the preparation process of the existing magnesium-based composite material is small, and the strength of a large amount of magnesium alloy waste is poor, and provides a high-entropy alloy particle-reinforced magnesium-based composite lost foam casting preparation method

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0018] Specific implementation mode 1: This implementation mode is a preparation method of high-entropy alloy particle reinforced magnesium-based composite lost foam casting, which is specifically carried out according to the following steps:

[0019] 1. Melting: put the new ingot AZ91D magnesium alloy and AZ91D magnesium alloy scrap at the bottom of the melting furnace, and when the temperature in the furnace rises to 400°C-450°C, pass protective gas into the furnace or add a flame-retardant covering agent, and then heat Raise the temperature to 740°C-750°C, and carry out two-way stirring by rotary jetting after all the materials in the furnace are melted into a liquid state; The entropy alloy particles are then stirred for 1min to 5min under the condition of two-way stirring by rotating jet and the two-way stirring speed is 100rpm-400rpm, to obtain a mixed melt;

[0020] The mass fraction of the high-entropy alloy particles in the mixed melt is 1%-10%, and the diameter of th...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that the high-entropy alloy particles described in step 1 are AlCoCrFeNi, AlCoCrCuFeNi or AlCoCuFeNi. Others are the same as the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the flame retardant covering agent described in step 1 is RJ2 solvent. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method for a magnesium-based composite material, in particular to a preparation method for lost foam casting of a high-entropy alloy particle-reinforced magnesium-based composite material. The method aims to solve the technical problem that in the preparation process of an existing magnesium-based composite material, the addition proportion of magnesium alloywaste is small, and the strength is poor when a large amount of magnesium alloy waste is added. By adopting a lost foam casting method, utilizing two-way shear stirring, adding high-entropy alloy particles and performing ultrasonic treatment in the casting process, structure heredity is effectively improved, uneven dispersion of the particles at different positions of a magnesium alloy melt is avoided, structure coarsening is reduced, grain growth in the solidification process is inhibited, grains are refined, the utilization rate of magnesium alloy waste is increased, and the performance ofthe lost foam casting product is improved. In the method, the utilization rate of AZ91D waste is high, the maximum waste addition amount accounts for 34% of the total mass, raw materials are saved, and costs are reduced. The method is also suitable for continuous production operation and is an environment-friendly method.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-based composite material. Background technique [0002] Magnesium alloy, as one of the green materials in the 21st century, is the lightest metal material for engineering applications. It has the advantages of low density, high specific strength, and good shock resistance and damping performance. With the wide application of magnesium alloys in aviation, aerospace, automobiles, communication equipment and transportation, more and more magnesium alloy parts are produced, and the amount of waste products will also increase accordingly. In order to pursue zero waste and green manufacturing, the recycling and reuse of magnesium alloys has attracted increasing attention from material workers. For process waste, substandard parts, or material heads, sprues, and risers in products produced during the manufacturing process of magnesium alloy parts, Slag bags and other waste. Usually, the scrap meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/03C22C1/06B22C9/04B22D27/08
CPCB22C9/04B22D27/08C22C1/03C22C1/06C22C23/00
Inventor 吉泽升陈永生孙晓梅
Owner 哈尔滨吉星机械工程有限公司
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