A method for continuous melting and casting of high-quality zirconium-containing magnesium alloy

Abstract

The invention provides a continuous smelting and casting method of high-quality zirconium-containing magnesium alloy. The continuous smelting and casting method comprises the three continuous steps of high-density solvent refining for impurity removal, zero-impurity drag-in type degassing treatment and solvent-free efficient alloying, wherein rapid separation of a pure magnesium melt and slag is achieved through the high-density solvent refining for impurity removal, then degassing treatment is conducted on the refined pure magnesium melt by adding a zero-impurity drag-in paraffin-graphite degassing agent, finally the alloying is completed by adding a zinc element, magnesium-zirconium intermediate alloy subjected to isothermal forging deformation treatment and magnesium-rare earth intermediate alloy subjected to isothermal forging deformation treatment in a solvent-free crucible, and casting and forming of the high-quality zirconium-containing magnesium alloy melt are completed in a tilt rotating mode of the crucible. The continuous smelting and casting method meets the component ageing sensibility and high melt quality requirements of the zirconium-containing magnesium alloy, and the continuous smelting and casting method of the high-quality zirconium-containing magnesium alloy is low in inclusion content and low in melt gas content and capable of efficiently utilizing alloy elements and achieving continuous smelting and casting.

Description

technical field

[0001] The invention relates to a method for preparing a cast magnesium alloy in the technical field of metal materials, in particular to a method for continuous melting and casting of a high-quality zirconium-containing magnesium alloy. Background technique

[0002] Magnesium alloys have the advantages of high specific strength, high damping and shock absorption, high thermal conductivity, high specific elastic modulus, high machinability, high electrostatic shielding and low density. Since the beginning of the last century, magnesium alloys have been gradually applied in the fields of automobiles, aviation, aerospace and military industry. Now magnesium alloy products have been widely used in bicycles, electronic products and other civilian fields. Moreover, due to the high recycling efficiency of magnesium alloy, it is also known as the "green engineering material" of the 21st century.

[0003] Cast magnesium alloys can be roughly divided into three categ...

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