High-elasticity-modulus magnesium-based composite material with high calcium content and high aluminum content, and preparation method of high-elasticity-modulus magnesium-based composite material

Abstract

The invention provides a high-elasticity-modulus magnesium-based composite material with the high calcium content and the high aluminum content. The magnesium-based composite material is prepared fromthe following components in percentage by mass: 4.00-25.00% of Ca, 4.00-25.00% of Al, 0.00-3.00% of Sr, 0.00-8.00% of Nd, 0.00-8.00% of Y, 0.00-8.00% of Gd, 0.00-8.00% of Er, and the balance of Mg and impurities. A preparation method comprises the following steps of (1) material preparing, and (2) cast ingot smelting. The high-elasticity-modulus magnesium-based composite material with the high calcium content and the high aluminum content and the preparation method have the beneficial effects that 1, compared with a conventional magnesium-aluminum-calcium series magnesium alloy, the elasticity modulus of the material is concerned in a more emphasized mode while the strength is concerned, an eutectic structure phase is composed of alpha-Mg and a Mg2Ca phase, a Al2Ca phase, a (Mg, Al)2Ca phase which have the high modulus, the eutectic structure content is high, and the contents of all the phases can be effectively adjusted and controlled to further adjust and control the overall modulusof the material; and 2, common casting is adopted, the technological process is simple, the morphology of the eutectic structure is adjusted and controlled by adjusting and controlling ingredients, and the magnesium-based composite material with the high elasticity modulus and high strength is prepared.

Description

technical field [0001] The invention belongs to the field of magnesium alloys and magnesium-based composite materials, and in particular relates to a high-elastic-modulus magnesium-based composite material with high calcium and aluminum content and a preparation method. Background technique [0002] In recent years, the energy crisis, resource depletion and environmental degradation have put forward higher requirements for aerospace and automotive industry's lightweight, energy saving and emission reduction and low-carbon environmental protection. Magnesium alloys have attracted increasing attention due to their excellent properties such as low density, high specific strength, and high specific stiffness, and have become an important research direction for metal structural materials in recent years. Most of the relevant research work in the early stage focused on the strength and toughness of magnesium alloys: by adding alloy elements such as aluminum and yttrium that have a...

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Problems solved by technology

At present, the alloying elements added to commercial magnesium alloys generally do not exceed 10% (mass percentage), and the strengthening design ideas of magnesium alloy materials also mostly imitate aluminum alloy materials, adopting microalloying and solution-aging heat treatment processes to achieve high density. The precipitated fine second phases, such as Ag, Ca, Zr and other microalloying elements in Mg-Zn alloys, and solid solution-aging heat treatment process to control the size and shape of precipitated phases, however, for a large number of eutectic structures or even There are few reports on the design of magnesium alloy materials with complete eutectic structure

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