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Preparation method of flame-retardant magnesium alloy

A magnesium alloy and intermediate alloy technology, applied in the field of preparation of flame-retardant magnesium alloy, can solve the problems of toxic substances and high cost of raw materials, and achieve the effect of being beneficial to environmental protection and reducing safety hazards

Active Publication Date: 2013-12-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a flame-retardant magnesium alloy, the mass percentage of each component element in the flame-retardant magnesium alloy is: Mg90.7-92.7%, Al6.0%, Mn0.3 %, Ca0.5~1.5%, Y0.5~1.5%, overcome the shortcomings of high raw material cost and toxic substances in the flame-retardant magnesium alloy in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The first step, raw material configuration

[0025] According to the mass percentage of each component element in the target magnesium alloy: Mg92.7%, Al6.0%, Mn0.3%, Ca0.5%, Y0.5%, weigh the required mass of magnesium with a purity of 99.99%. Ingots, aluminum ingots with a purity of 99.99%, manganese flakes with a purity of 99.99%, Mg-Ca master alloys with a calcium content of 20wt%, and Mg-Y master alloys with a yttrium content of 25wt% are used as raw materials to prepare materials;

[0026] The second step, smelting and refining

[0027] Put all the raw materials weighed in the first step into a gas-protected melting furnace, and melt them at a temperature of 760 ° C. During the melting process, a volume ratio of CO 2 :SF 6 = 100:1 CO 2 / SF 6 Mixed gas for protection, after all raw materials are completely melted, remove surface impurities, mechanically stir for 2 minutes, stirring paddle speed 100 rpm, let stand for 5 minutes, cool down to 740°C, add calcium ca...

Embodiment 2

[0032] The first step, raw material configuration

[0033] According to the mass percentage of each component element in the target magnesium alloy: Mg91.7%, Al6.0%, Mn0.3%, Ca1.0%, Y1.0%, weigh the required mass of magnesium with a purity of 99.99%. Ingots, aluminum ingots with a purity of 99.99%, manganese flakes with a purity of 99.99%, Mg-Ca master alloys with a calcium content of 20wt%, and Mg-Y master alloys with a yttrium content of 25wt% are used as raw materials to prepare materials;

[0034] The second step, smelting and refining

[0035] Put all the raw materials weighed in the first step into a gas-protected melting furnace, and melt them at a temperature of 760 ° C. During the melting process, a volume ratio of CO 2 :SF 6 = 100:1 CO 2 / SF 6 Mixed gas for protection, after all raw materials are completely melted, remove surface impurities, mechanically stir for 2 minutes, stirring paddle speed 100 rpm, let stand for 5 minutes, cool down to 740°C, add calcium ca...

Embodiment 3

[0040] The first step, raw material configuration

[0041] According to the mass percentage of each component element in the target magnesium alloy: Mg90.7%, Al6.0%, Mn0.3%, Ca1.5%, Y1.5%, weigh the required mass of magnesium with a purity of 99.99%. Ingots, aluminum ingots with a purity of 99.99%, manganese flakes with a purity of 99.99%, Mg-Ca master alloys with a calcium content of 20wt%, and Mg-Y master alloys with a yttrium content of 25wt% are used as raw materials to prepare materials;

[0042] The second step, smelting and refining

[0043] Put all the raw materials weighed in the first step into a gas-protected melting furnace, and melt them at a temperature of 760 ° C. During the melting process, a volume ratio of CO 2 :SF 6 = 100:1 CO 2 / SF 6 Mixed gas for protection, after all raw materials are completely melted, remove surface impurities, mechanically stir for 2 minutes, stirring paddle speed 100 rpm, let stand for 5 minutes, cool down to 740°C, add calcium ca...

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Abstract

The invention discloses a preparation method of a flame-retardant magnesium alloy and relates to a magnesium alloy with aluminum as a minor main component. The method comprises the steps of weighing a magnesium ingot, an aluminum ingot, an Mg-Ca master alloy with the calcium content of 20 wt percent and an Mg-Y master alloy with the yttrium content of 25 wt percent as raw materials for feed preparation according to the mass percentage of component elements in the target magnesium alloy, wherein the target magnesium alloy comprises component elements in percentage by weight: 90.7-92.7 percent of Mg, 6.0 percent of Al, 0.3 percent of Mn, 0.5-1.5 percent of Ca and 0.5-1.5 percent of Y, the purity of a magnesium ingot is 99.99 percent, the purity of an aluminum ingot is 99.99 percent, and the purity of a manganese sheet is 99.99 percent; and putting all the raw materials in a gas protection melting furnace, carrying out smelting on the raw materials, then adding a refining agent into the gas protection melting furnace, carrying out refining, pouring the refined raw materials into a cast iron die finally, and carrying out air cooling until room temperature is reached to prepare a flame-retardant magnesium alloy cast ingot of Mg-Al-Mn-Ca-Y. With the adoption of the preparation method, the disadvantages of the flame-retardant magnesium alloy in the prior art that the raw material cost is high, and components contain toxic substances are overcome.

Description

technical field [0001] The technical solution of the invention relates to a magnesium-based alloy with aluminum as the secondary main component, specifically a method for preparing a flame-retardant magnesium alloy. Background technique [0002] Magnesium alloy is the lightest metal structure material in practical application and plays an important role in various fields of national economy. Magnesium and magnesium alloys have a low ignition point and are easy to burn, which causes inconvenience to industrial production. Certain measures must be taken during smelting. Usually, in order to solve the combustion problem in magnesium smelting, gas protection method, solvent covering method, alloying flame retardant and other methods are often used. Among them, the gas protection law will produce a large amount of greenhouse gases, which is not conducive to environmental protection. The solvent covering method needs to continuously add covering agents to the melt surface during...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C23/02C22C1/06
Inventor 王志峰赵维民王岳宸丁俭李永艳薛海涛
Owner HEBEI UNIV OF TECH
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