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High-modulus magnesium matrix composite material containing SiC particles and preparation method thereof

A technology of composite materials and particles, applied in the field of high-modulus magnesium-based composite materials, can solve the problems of low elastic modulus, poor elastic deformation resistance, and low elastic modulus of Mg-RE alloys, and achieve high room temperature strength and good Plasticity, Effect of High Elastic Modulus

Active Publication Date: 2015-02-11
BAIC MOTOR CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, MgGd (56.9GPa), Mg 3 Gd(46.1GPa), Mg 7 Gd(52.6GPa), MgY(55.7GPa), Mg 24 Y 5 (53.8GPa) and MgNd (55.4GPa) and other phases have relatively low elastic modulus, so that the elastic modulus of Mg-RE alloy is also relatively low, only 40-45GPa, which ultimately leads to poor elastic deformation resistance and cannot meet Requirements for lightweight, high-strength, high-modulus heat-resistant magnesium alloy materials in the engineering field

Method used

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  • High-modulus magnesium matrix composite material containing SiC particles and preparation method thereof
  • High-modulus magnesium matrix composite material containing SiC particles and preparation method thereof
  • High-modulus magnesium matrix composite material containing SiC particles and preparation method thereof

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preparation example Construction

[0081] Furthermore, the present invention provides a method for preparing a high modulus magnesium-based composite material, comprising the following steps:

[0082] 1) Drilling holes on the pure magnesium ingot, the diameter of the hole is 2.0-2.5cm; carrying out surface modification treatment on the SiC particles, and putting them into the holes after drying to obtain a pure magnesium ingot with SiC particles;

[0083] 2) Melting and casting: Put the pure magnesium ingot equipped with SiC particles obtained in step 1) into an iron crucible and heat it to 730-750° C. under an Ar gas protective atmosphere. After the pure magnesium ingot is melted, stir the melt, Rapidly raise the temperature to 770-780°C until the pure magnesium ingot melts the master alloy of pure zinc and other components and stirs, refines and removes slag, and casts to obtain ingots; control all master alloys to completely melt and refine and remove slag until casting time is less than or equal to 4 minute...

Embodiment 1

[0090] Embodiment 1, preparation and performance identification of magnesium-based composite material of the present invention

[0091] In the embodiment of the present invention, according to Table 1-Table 4 (X is selected from aluminum (Al), titanium (Ti), silver (Ag), zirconium (Zr), calcium (Ca), scandium (Sc), lanthanum (La) , cerium (Ce), europium (Eu), praseodymium (Pr), promethium (Pm), samarium (Sm) in any one) to prepare magnesium-based composite materials respectively, the specific preparation method is as follows Said:

[0092] 1. According to the designed high-modulus magnesium-based composite component distribution ratio, each component is taken separately, among which: Mg is added in the form of pure magnesium, and SiC particles are β-SiC with micron size p (particle size is 1.0-20μm), Zn is added in the form of pure zinc, and the rest of the components are added in the form of magnesium-based master alloy;

[0093] 2. Drill holes on pure magnesium ingots with...

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Abstract

The invention provides a high-modulus magnesium matrix composite material containing SiC particles. The high-modulus magnesium matrix composite material comprises the following components in percentage by mass: 1.0%-10.0% of yttrium and / or neodymium, 1.0%-15.0% of SiC, 1.0%-5.0% of at least one of tin, stibium and zinc, and the balance of magnesium, wherein the sum of the components in the percentage by mass is 100%. The preparation method comprises the following steps: punching a pure magnesium ingot, enclosing the SiC particles which are subjected to surface modification treatment and are dried into holes; heating and fusing pure magnesium under a protective atmosphere; quickly warming after stirring, and sequentially adding and stirring middle alloy of other components; controlling the middle alloy to completely fuse until the casting time is smaller than or equal to 4 minutes; refining and drossing, casting to obtain the cast ingot. The high-modulus magnesium matrix composite material is reasonable in component proportion, and easy to process and manufacture; the prepared magnesium matrix composite material has high room-temperature strength and elasticity modulus, and relatively good plasticity; the overall performance is obviously higher than that of existing rare-earth magnesium alloy; the high-modulus magnesium matrix composite material and the preparation method thereof are suitable for industrial production.

Description

technical field [0001] The invention relates to a high-modulus magnesium-based composite material containing SiC particles, and the elastic modulus of the alloy at room temperature can reach 50-70GPa. It belongs to the field of non-ferrous metal materials and their processing. Background technique [0002] In order to achieve the purpose of reducing weight and increasing efficiency, the demand for high-performance lightweight materials in the automotive industry is growing rapidly. Magnesium alloy materials, as the lightest metal structural materials that can be industrially produced, have received special attention. In recent years, the speed of transportation and aerospace tools has become higher and higher, and the required power is increasing, which puts forward higher requirements for the heat resistance and elastic deformation resistance of materials. Alloying is an effective means to improve the mechanical properties of alloys. Since the 1940s, a series of Mg-RE all...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C32/00C22C1/03C22C1/10C22F1/06
CPCC22C1/03C22C23/00C22C32/0063C22F1/06
Inventor 胡继龙
Owner BAIC MOTOR CORP LTD
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