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Molten salts for the refining of MG alloys

A technology for refining magnesium and molten salt, applied in the field of molten salt of magnesium alloys

Inactive Publication Date: 2012-09-19
POHANG IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, since these inclusions have a specific gravity similar to that of molten magnesium, it takes a long time to separate them by floating or sedimentation

Method used

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  • Molten salts for the refining of MG alloys
  • Molten salts for the refining of MG alloys

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Experimental program
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Embodiment Construction

[0023] Based on the facts described in the technical proposal, a salt composition capable of effectively removing impurities while minimizing loss of Sr in molten magnesium was evaluated and tested. In accordance with the purpose of the present invention, the results of some of the components of the various test results are shown in Table 1 below. Unless specifically defined otherwise below, % means wt%.

[0024] As test conditions, the magnesium alloy is composed of 96% Mg-3% Al-1% Sr, the weight ratio of magnesium alloy to molten salt is set to 10:1, and the process temperature is set to 700°C. In addition, the composition of the magnesium alloy and the composition of the molten salt were investigated after the reaction with the molten salt to determine the extent of Sr loss.

[0025] Table 1

[0026]

[0027]

[0028] It is clear from Table 1 that, when including MgCl 2 and CaCl 2 In Comparative Example 1 and Comparative Example 2 in which molten salt was the mai...

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Abstract

The present invention relates to a molten salt for refining magnesium alloys, especially Sr- containing magnesium alloys, and more specifically, relates to a molten salt for refining magnesium alloys to effectively remove impurities and to minimize the loss of Sr from Sr- containing magnesium molten alloy melt. This molten salt is a LiCl-KCl binary molten salt, a LiCl-KCl-NaCl ternary molten salt, or a binary or ternary molten salt containing 20% or less of MgCl2 or CaCl2 based on the total weight thereof. The molten salt may include 10 wt% or less of impurities in the working procedure.

Description

technical field [0001] The present invention relates to a kind of molten salt that is used for refining magnesium alloy, especially relates to the molten salt that is used for refining magnesium alloy containing Sr, more particularly, the present invention relates to a kind of molten salt that is used for refining magnesium alloy, thereby effectively Impurities are removed and the loss of Sr in the Sr-containing magnesium molten alloy melt is minimized. Background technique [0002] Magnesium alloys containing Sr have high creep properties even at high temperatures during the formation of Sr-containing intermetallic compounds when casting Sr-containing magnesium alloys. It is attracting attention as a next-generation material. [0003] Based on these properties, the use of Mg-Al-Sr alloys as components of motor vehicles or aircraft, in particular as high-temperature magnesium alloy products, has recently grown significantly. Such parts are manufactured by melting an ingot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C23/02C22C23/00
CPCC22B26/22C22B9/10
Inventor 安相镐朴羽振郑印镐秋东均金真原
Owner POHANG IRON & STEEL CO LTD
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