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Production method of magnesium-zirconium master alloy

A magnesium-zirconium master alloy and a production method technology are applied in the production field of magnesium-zirconium master alloy, which can solve the problems of complex process and uneven distribution of Zr, and achieve the effects of uniform distribution of Zr, avoiding high temperature volatilization and reducing combustion.

Active Publication Date: 2019-05-10
BAOTOU RARE EARTH RES & DEV CENT CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process uses vacuum equipment and vaporizes ZrCl 4 , the process is complicated, and the distribution of Zr is uneven

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Metal magnesium is melted in the reduction furnace and fed with CO 2 and SF 6 The mixed gas (flow rate is 0.5L / min, pressure is 1 atmosphere, SF 6 The content is 1vol%). At 750°C, zirconium chloride (Mg / ZrCl 4 =1:0.13), every 30 minutes, add 1 / 3 weight of zirconium chloride, and maintain the reaction for 1 hour after the addition is completed. Refining with argon blowing before being released from the furnace, the alloy melt is cast into a mold and fed with CO 2 and SF 6 The mixed gas (flow rate is 0.5L / min, pressure is 1 atmosphere, SF 6 The content is 1vol%), and the magnesium-zirconium master alloy with the zirconium content of 5wt% is prepared.

Embodiment 2

[0032] Metal magnesium is melted in the reduction furnace and fed with CO 2 and SF 6 The mixed gas (flow rate is 0.5L / min, pressure is 1 atmosphere, SF 6 The content is 1vol%). At 800°C, zirconium chloride (Mg / ZrCl 4 =1:0.26), every 30 minutes, add 1 / 3 weight of zirconium chloride, and maintain the reaction for 1 hour after the addition is completed. Refining with argon blowing before being released from the furnace, the alloy melt is cast into a mold and fed with CO 2 and SF 6 The mixed gas (flow rate is 0.5L / min, pressure is 1 atmosphere, SF 6 The content is 1vol%), and the magnesium-zirconium master alloy with the zirconium content of 10wt% is prepared.

Embodiment 3

[0034] Metal magnesium is melted in the reduction furnace and fed with CO 2 and SF 6 The mixed gas (flow rate is 0.5L / min, pressure is 1 atmosphere, SF 6 The content is 1vol%). At 850°C, zirconium chloride (Mg / ZrCl 4 =1:0.4), every 30 minutes, add 1 / 3 weight of zirconium chloride, and maintain the reaction for 1.5 hours after the addition is completed. Refining with argon blowing before being released from the furnace, the alloy melt is cast into a mold and fed with CO 2 and SF 6 The mixed gas (flow rate is 0.5L / min, pressure is 1 atmosphere, SF 6 The content is 1vol%), and the magnesium-zirconium master alloy with the zirconium content of 14wt% is prepared.

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Abstract

The invention discloses a production method of a magnesium-zirconium intermediate alloy. The production method comprises the following steps that magnesium metal is molten in a reacting furnace, mixedgas consisting of CO2 and SF6 is supplied into the reacting furnace, when the temperature of the reacting furnace reaches 750-900 DEG C, zirconium chloride is added step by step under the stirring action with the stirring rate being 300-800 r / min, and after the adding is completed, a reaction lasts for 1-2 h, wherein the volume percent of SF6 in the mixed gas is 0.5-1.5vol%, and a weight ratio ofmagnesium metal to zirconium chloride is 1:(0.1-0.5). The production method can improve the distribution uniformity of zirconium in the magnesium-zirconium intermediate alloy.

Description

technical field [0001] The invention relates to a production method of a magnesium-zirconium master alloy. Background technique [0002] Magnesium alloys usually need to add some alloying elements to improve their properties. For example, Al and Zn can improve the room temperature strength of magnesium alloys; Mn, Fe and other heavy metal elements can improve the corrosion resistance of magnesium alloys; rare earth elements can increase the recrystallization temperature of magnesium alloys and slow down the recrystallization process, thereby greatly improving the Alloy high temperature strength and creep resistance. Both Zr and Mg belong to the close-packed hexagonal lattice, and the lattice constants are very close. During crystallization, Zr is easy to become a crystal nucleus, which obviously refines the alloy grains, thereby greatly improving the mechanical properties of the magnesium alloy. In addition, Zr also has a great effect on improving the corrosion resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/02C22C1/06
CPCC22C1/02C22C1/06C22C23/00
Inventor 牛晓东池建义赵卫涛孟健温永清刘飞高乐乐张静
Owner BAOTOU RARE EARTH RES & DEV CENT CHINESE ACADEMY OF SCI
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