Covering agent for smelting Ca-containing magnesium alloy and preparation method of covering agent

By adjusting the composition and structure of the cover agent, a stable film is formed on the surface of the magnesium alloy liquid, which solves the problems of Ca element burning and unstable magnesium alloy quality, and improves the yield of Ca element and the smelting quality of magnesium alloy.

CN119101820APending Publication Date: 2024-12-10BAOSTEEL METAL CO LTD +1
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Patent Information

Application Number
CN202310669534.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-06-07
Publication Date
2024-12-10

AI Technical Summary

Technical Problem

During the smelting of magnesium alloy, Ca element is severely burned, resulting in unstable quality and inclusion of magnesium alloy. The existing cover agent Ca element has low yield and is not long-lasting, which affects the alloy performance.

Method used

Using magnesium chloride, sodium chloride, potassium chloride, calcium chloride, calcium fluoride and calcium carbonate, the melting point and foaming characteristics are adjusted to form a stable film on the surface of the magnesium alloy liquid, reducing the oxidation reaction and Improve the utilization rate of Ca elements.

Benefits of technology

It significantly improves the yield of Ca elements, reduces inclusions in castings, extends the protection time of the cover agent, and improves the smelting quality and performance of magnesium alloys.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a covering agent for Ca-containing magnesium alloy smelting and a preparation method thereof, the covering agent comprises the following components by mass percent: 30-55% of magnesium chloride, 10-20% of sodium chloride, 10-20% of potassium chloride, 10-25% of calcium chloride, 1-15% of calcium fluoride and 1-15% of calcium carbonate foaming agent, and the mass ratio of calcium chloride to calcium fluoride to calcium carbonate is 1: (0.5-1): (0.3-0.6). According to the covering agent, the yield of the Ca element in the smelting process of the Ca-containing magnesium alloy can be greatly improved, the yield of the Ca element is improved by 20% or above compared with an existing covering agent, meanwhile, the inclusion phenomenon in a casting can be reduced, and therefore the product quality is improved.
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Citation Information

Patent Citations

  • Foaming flame-retardant magnesium alloy covering agent and preparation method thereof

    CN103509956A

  • Fusion agent used for calcium-containing magnesium alloy and preparing method of fusion agent

    CN108374098A

  • Foamed magnesium alloy covering agent

    CN1288967A