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Protective gas and protective method for smelting magnesium and magnesium alloy

A technology of protective gas and magnesium alloy, which is applied in the field of metallurgy to achieve the effects of high purity, good protection quality and simple process

Inactive Publication Date: 2013-08-07
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing protection gas for magnesium and magnesium alloy smelting, and to provide a protection gas and protection method for magnesium and magnesium alloy smelting, so as to simplify the protection process, improve the protection quality and effect, and reduce environmental pollution. Purpose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1, magnesium and magnesium alloy smelting shielding gas is by volume content 1% industrial purity SO 2 Gas and volume content of 99% industrial purity CO 2 Composition of gas mixtures.

Embodiment 2

[0010] Embodiment 2, magnesium and magnesium alloy smelting shielding gas are by volume content 2% industrial purity SO 2 Gas and volume content of 98% industrial purity CO 2 Composition of gas mixtures.

Embodiment 3

[0011] Embodiment 3, magnesium and magnesium alloy smelting shielding gas are by volume content 3% industrial purity SO 2 Gas and CO with a volume content of 97% industrial purity 2 Composition of gas mixtures.

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PUM

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Abstract

A protective gas and a protective method for smelting magnesium and magnesium alloy belong to the smelting technology. The protective gas comprises industrial-purity SO2 gas and industrial-purity CO2 gas according to different volume content ratios, and is led to a smelting furnace which is not sealed in the atmospheric environment to protect the smelting of the magnesium and the magnesium alloy,so that the mixture of the SO2 gas and the CO2 gas form a dense inflaming retarding protective film on the surface of magnesium melt under different temperatures. The invention has the advantages that the magnesium alloy in the smelting furnace can be smelted in the atmospheric environment, the inflaming retarding effect is favorable, the environmental pollution is low, and the practical application value is high.

Description

technical field [0001] The invention belongs to the metallurgical technology, and mainly relates to a protective gas for smelting magnesium and magnesium alloys and a protective method. Background technique [0002] Magnesium alloys are called "new metal materials after the 1990s". The development and application of magnesium alloys are of great significance to human beings. Because the molten magnesium alloy is easy to oxidize rapidly in the atmosphere, and the oxide film on the surface of the magnesium alloy cannot prevent the further oxidation of the melt and cause it to burn. Therefore, the oxidation prevention and flame retardancy of magnesium and magnesium alloys become particularly important in the process of smelting and casting. At present, there are three main flame retardant methods for magnesium alloys in the smelting process: alloy element method, flux protection method and gas protection method. Due to the need to select specific alloying elements, the alloy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22B26/22C22C23/00C22B9/10
Inventor 梁维中刘洪汇宁志良王振廷曹福洋孙剑飞高秋吴诗伟
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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