Preparation method for alkaline earth heatproof magnesium alloy

Abstract

The invention relates to a preparation method for alkaline earth heatproof magnesium alloy. According to the invention, magnesium and aluminum are used raw materials, and magnesium-strontium intermediate alloy, magnesium-calcium intermediate alloy, magnesium-yttrium intermediate alloy, magnesium-lanthanum intermediate alloy and alkaline earth magnesium-strontium intermediate alloy and magnesium-calcium intermediate alloy are added as a main addition chain; and then melting at a vacuum melting furnace under the protection of argon, casting for formation of an ingot, cutting and low temperature tempering are carried out so as to prepare an alkaline earth heatproof magnesium alloy ingot. The preparation method provided by the invention has the advantages of an advanced process, reasonable proportioning, detailed and accurate data, no pollution to the environment, safety, stability and reliability; the prepared alkaline earth heatproof magnesium alloy ingot has a compact metallographic structure and high strength and has a tensile strength of 190 MPa, a yield strength of 140 MPa and elongation of 4.0% after insulation at a temperature of 200 DEG C for 20 min; and the preparation method is an ideal preparation method for the alkaline earth heatproof magnesium alloy.

Description

technical field [0001] The invention relates to a preparation method of alkaline earth heat-resistant magnesium alloy, which belongs to the technical field of nonferrous metal preparation and application. Background technique [0002] Magnesium and magnesium alloys are the lightest metal structural materials, with high specific strength and specific stiffness, good electrical and thermal conductivity, magnetic shielding, damping and shock absorption, and machinability. And other industrial fields have been widely used. [0003] Although magnesium and magnesium alloys have many excellent properties and a wide range of uses, they also have defects and insufficient performance, such as low strength, poor heat resistance, poor corrosion resistance, low melting point, and poor plasticity, which greatly limit the use of magnesium and magnesium alloys. Applications of magnesium alloys. [0004] Due to the unique chemical and physical properties of magnesium and magnesium alloys, ...

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Problems solved by technology

[0003] Although magnesium and magnesium alloys have many excellent properties and a wide range of uses, they also have defects and insufficient performance, such as low strength, poor heat resistance, poor corrosion resistance, low melting point, and poor plasticity, which greatly limit the use of magnesium and magnesium alloys. Application range of magnesium alloy

[0004] Due to the unique chemical and physical properties of magnesium and magnesium alloys, during the preparation and smelting process, magnesium elements are extremely easy to burn and evaporate, and are extremely easy to oxidize, which brings many difficulties to the preparation of magnesium alloys, especially the preparation of heat-resistant magnesium alloys. Mature technical solutions are still under discussion and research

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