Preparation method of magnesium-based composite material applied to automobile differential support

A technology for automotive differentials and composite materials, which is used in manufacturing tools, casting equipment, metal processing equipment, etc., and can solve problems such as uneven agglomeration and stirring of particles

Active Publication Date: 2020-10-23
哈尔滨吉星机械工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is to solve the technical problem that the existing AZ91D magnesium alloy replaces the aluminum alloy for the insufficient strength of the automobile differential bracket, and provides a preparation method of a magnesium-based composite material applied to the automobile differential bracket to realize the magnesium-based composite material. Materials The automobile differential bracket replaces the existing aluminum alloy differential bracket. During the preparation of the magnesium-based composite material, two-way rotating injec

Method used

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Examples

Experimental program
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specific Embodiment approach 1

[0020] Specific Embodiment 1: This embodiment is a method for preparing a magnesium-based composite material applied to an automobile differential bracket, specifically as follows:

[0021] 1. Melting: Place the magnesium alloy AZ91D at the bottom of the melting furnace. 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 up to 740°C-750°C After the magnesium alloy AZ91D in the furnace is completely melted into a liquid state, high-entropy alloy particles are added to the magnesium alloy melt under the condition of rotating and blowing two-way stirring and the two-way stirring speed is 100rpm-400rpm, and then rotating and blowing two-way stirring for 1min ~2min and the two-way stirring speed is 100rpm~400rpm, and then under the condition of rotary jet two-way stirring and the two-way stirring speed is 100rpm~400rpm, the magnesium alloy melt is mechanically vibrated in the X directi...

specific Embodiment approach 2

[0025] 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

[0026] 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 discloses a preparation method of a magnesium-based composite material applied to an automobile differential support, and relates to a preparation method of a composite material appliedto the automobile differential support. The method aims at solving the technical problem that an existing AZ91D magnesium alloy is not strong enough to replace an aluminum alloy for an automobile differential support. Through spinning spraying and bidirectional stirring, high-entropy alloy particles are added into an AZ91D magnesium alloy melt, the stirring time can be shortened, and the aggregation effect of broken particles is remarkable; X-direction and Y-direction mechanical vibration is conducted simultaneously, aggregation of the particles in a broken side wall area is facilitated, and thus the particles in the side wall area are stirred to the middle of the melt along with shearing to be sufficiently mixed with the melt; and a screen net is placed on the surface of molten metal in amaterial barrel to filter oxidized slag inclusions, and finally an extrusion casting process is conducted to prepare a product. The high-entropy alloy particles are uniformly dispersed, the strengthand hardness of the product are also greatly improved, the interior of the product is free of defects of oxidized slag inclusions, the particles are combined with a base body well, and the applicationsituation of the magnesium-based composite material can be further broadened.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-based composite material applied to an automobile differential bracket. Background technique [0002] Magnesium alloy has the advantages of low density (about two-thirds of that of aluminum alloy), high specific strength, and good shock resistance and damping performance. It has broad application prospects in the fields of automobiles and electronic products. However, the low hardness, low room temperature strength and plasticity of magnesium alloys largely limit its application. Magnesium-based composites can eliminate or alleviate the disadvantages of the above-mentioned magnesium alloys. The process of adding particle-reinforced metal matrix composites is simple and low-cost. For example, adding SiC particles can improve the strength and hardness of magnesium alloys. Due to the natural compatibility between metals and metals, adding metal particles inside the liquid metal can overcome th...

Claims

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Application Information

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IPC IPC(8): B22D18/02B22D1/00B22D43/00C22C30/00
CPCB22D1/00B22D1/002B22D18/02B22D43/004C22C30/00
Inventor 吉泽升陈永生崔鹏星张勋赵春芳许红雨胡茂良张永冰
Owner 哈尔滨吉星机械工程有限公司
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