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

A high-quality, magnesium alloy technology, applied in the field of continuous smelting and casting of high-quality zirconium-containing magnesium alloys, and the preparation of cast magnesium alloys, can solve the problems of failure to meet the quality requirements of zirconium-containing magnesium alloy castings, the quality of the alloy melt, and the quality of the castings. It is difficult to improve the efficiency and other problems, and achieve the effect of strong product quality control, less inclusions, and avoiding oxidation and air absorption

Active Publication Date: 2017-07-25
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is simple, effective, and easy to implement, but for high-quality magnesium-zirconium series alloy melts for casting, this method does not pay enough attention to refining impurity removal treatment and melt degassing treatment, resulting in a decrease in the quality of the alloy melt, and ultimately makes the It is difficult to improve the pass rate of castings, which cannot meet the quality requirements of zirconium-containing magnesium alloy castings

Method used

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

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Effect test

Embodiment 1

[0022] Embodiment 1: (ZE41A)

[0023] A high-quality zirconium-containing magnesium alloy continuous melting casting method, comprising the following steps:

[0024] (1) Put 89kg of pure magnesium ingots with a magnesium content greater than 99.5% in a low-carbon steel smelting crucible, and evenly sprinkle RJ-2 flux into the bottom of the magnesium ingots and in each stacking layer. The amount of RJ-2 flux accounts for The mass fraction of magnesium ingot is 1%, and then the temperature of the melting furnace is set to 830°C to melt the magnesium ingot rapidly, and the melt temperature is adjusted to 750°C, and then the formula is 46wt% MgCl 2 +40wt%KCl+14wt%CaF 2 The self-made high-density refining agent, combined with a low-carbon steel mechanical stirrer with a rotation speed of 260 rpm, refined the melt for 10 minutes, and then adjusted the melt temperature to 706°C.

[0025] (2) When the temperature of the melt in the melting crucible reaches 706°C, use a vacuum suctio...

Embodiment 2

[0028] Embodiment 2: (ZE63A)

[0029] A high-quality zirconium-containing magnesium alloy continuous melting casting method, comprising the following steps:

[0030] (1) Put 162kg of pure magnesium ingots with a magnesium content greater than 99.5% in a low-carbon steel smelting crucible, and evenly sprinkle RJ-2 flux into the bottom of the magnesium ingot and in each stacking layer. The amount of RJ-2 flux accounts for The mass fraction of magnesium ingot is 1.5%, and then the temperature of the melting furnace is set to 850°C to melt the magnesium ingot rapidly, and the melt temperature is adjusted to 760°C, and then the formula is 44wt% MgCl 2 +38wt%KCl+18wt%CaF 2 The self-made high-density refining agent, combined with a low-carbon steel mechanical stirrer with a rotation speed of 400 rpm, refined the melt for 15 minutes, and then adjusted the melt temperature to 710°C.

[0031] (2) When the melt temperature in the smelting crucible reaches 710°C, use a vacuum suction meth...

Embodiment 3

[0034] Embodiment 3: (ZK61A)

[0035] A high-quality zirconium-containing magnesium alloy continuous melting casting method, comprising the following steps:

[0036] (1) Put 160kg of pure magnesium ingots with a magnesium content greater than 99.5% in a low-carbon steel smelting crucible, and evenly sprinkle RJ-2 flux into the bottom of the magnesium ingot and in each stacking layer. The amount of RJ-2 flux accounts for The mass fraction of magnesium ingot is 1.3%, and then the temperature of the melting furnace is set to 840°C to melt the magnesium ingot rapidly, and the melt temperature is adjusted to 755°C, and then the formula is 45wt% MgCl 2 +39wt%KCl+16wt%CaF 2 The self-made high-density refining agent, combined with a low-carbon steel mechanical stirrer with a rotation speed of 330 rpm, refined the melt for 12 minutes, and then adjusted the melt temperature to 700°C.

[0037] (2) When the temperature of the melt in the melting crucible reaches 700°C, use a vacuum suct...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C1/03C22C23/00
CPCC22C1/03C22C1/06C22C23/00
Inventor 陈强万元元陶健全李晓松赵祖德王艳彬张帷王辉
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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