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Magnesium-nickel master alloy and preparation method thereof

A master alloy, magnesium-nickel technology, applied in the field of magnesium-nickel master alloy and its preparation, can solve problems such as difficulty in realizing large-scale production and application, difficulty in controlling melt temperature of magnesium-nickel alloy, affecting product preservation and use, etc., to avoid The effect of high melt temperature, good product quality stability and low equipment requirements

Active Publication Date: 2021-10-01
HUNAN RARE EARTH METAL MATERIAL RES INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN1165631C discloses a kind of preparation Mg 2 The method for Ni hydrogen storage alloy specifically discloses a method for preparing magnesium-nickel alloy by using magnesium powder and nickel powder through mixing, pressing, and sintering processes, but the preparation of magnesium-nickel alloy by powder metallurgy is costly and difficult to achieve large-scale production and applications
[0006] In addition, during the casting process, it is necessary to control the problem of slag inclusion in the melt, otherwise the produced magnesium-nickel alloy will be corroded in a short time, which will affect the preservation and use of the product
In the prior art, there is still the problem that it is difficult to control the melt temperature by using a non-vacuum intermediate frequency electromagnetic induction furnace to produce magnesium-nickel alloy, which may easily cause the melt to overburn

Method used

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  • Magnesium-nickel master alloy and preparation method thereof
  • Magnesium-nickel master alloy and preparation method thereof
  • Magnesium-nickel master alloy and preparation method thereof

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preparation example Construction

[0039] A kind of preparation method of magnesium-nickel master alloy provided by the present invention can specifically comprise the following steps:

[0040] (1) Weigh a certain amount of magnesium ingots and nickel blocks, and dry them; wherein, the weight ratio of the magnesium ingots to the nickel blocks is 1:0.25-0.35.

[0041] (2) take by weighing the magnesium ingot that accounts for 60~85% weight of its gross weight from the magnesium ingot that (1) takes by weighing and put into the crucible heating of non-vacuum intermediate frequency electromagnetic induction furnace, when the magnesium ingot begins to melt, add to SF was introduced into the crucible 6 with N 2 The mixed gas protects the melt. Among them, the use of non-vacuum intermediate frequency electromagnetic induction furnace can avoid the volatilization of magnesium under vacuum conditions. SF in mixed gas 6 with N 2 The mixing ratio of SF 6 :N 2 =1:25~100.

[0042] (3) After all the magnesium ingots...

Embodiment 1

[0054] (1) Take by weighing 25.02Kg of magnesium ingot, 7.76Kg of 1# nickel, dry;

[0055] (2) Take 15-21Kg of the magnesium ingot weighed in (1) and put it into a crucible in a non-vacuum intermediate frequency electromagnetic induction furnace for heating. When the magnesium ingot begins to melt, feed SF into the crucible 6 with N 2 The mixed gas with a ratio of 1:75 protects the molten magnesium;

[0056] (3) After all the magnesium ingots put into the furnace are melted, put the dried 1# nickel block into the crucible, and continuously inject SF on the surface of the melt 6 with N 2 The mixed gas protection melt with a ratio of 1:75;

[0057] (4) When the melt rises to 800-850°C, the nickel block starts to react with the magnesium liquid. At this time, in order to avoid the excessive temperature of the melt, reduce the power of the non-vacuum intermediate frequency electromagnetic induction furnace to 25KW (the normal melting temperature is 50KW);

[0058] (5) After th...

Embodiment 2

[0067] (1) Take by weighing 28.4Kg of magnesium ingot, 8.8Kg of 1# nickel, dry;

[0068] (2) Take 17-24Kg of the magnesium ingot weighed in (1) and put it into a non-vacuum intermediate frequency electromagnetic induction furnace for heating. When the magnesium ingot starts to melt, pour SF into the crucible 6 with N 2 The mixed gas with a ratio of 1:85 protects the molten magnesium;

[0069] (3) After all the magnesium ingots put into the furnace are melted, put the dried 1# nickel block into the crucible, and continuously inject SF on the surface of the melt 6 with N 2 The mixed gas protection melt with a ratio of 1:85;

[0070] (4) When the melt rises to about 800-850°C, the nickel block begins to react with the magnesium liquid. At this time, in order to avoid the melt temperature from being too high, reduce the power of the non-vacuum intermediate frequency electromagnetic induction furnace to 25KW (the normal melting temperature is 50KW);

[0071] (5) After the nic...

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Abstract

The invention discloses a magnesium-nickel master alloy and a preparation method thereof. The preparation method includes: taking magnesium ingots and nickel blocks and drying them; putting part of the magnesium ingots into a non-vacuum intermediate frequency electromagnetic induction furnace for heating, and passing through SF when the magnesium ingots start to melt 6 with N 2 The mixed gas; the magnesium ingot is completely melted and then put into the nickel block, and continuously fed with SF 6 with N 2 After the nickel block is fully reacted, stir the melt fully; close the non-vacuum intermediate frequency electromagnetic induction furnace, add the remaining magnesium ingots to the melt to cool down the melt, stir evenly, and cast. The present invention uses ordinary magnesium ingots and nickel as raw materials, utilizes ordinary non-vacuum intermediate-frequency electromagnetic induction furnaces, and controls the smelting process to produce magnesium-nickel alloys with good surface quality, uniform composition, and low slag inclusions, and can be preserved in conventional environments. It takes a long time; the production process is simple to operate, the magnesium alloy smelting has less burning loss, the equipment requirements are low, the product quality is stable, and mass production can be realized.

Description

technical field [0001] The invention relates to the technical field of master alloy preparation, in particular to a magnesium-nickel master alloy and a preparation method thereof. Background technique [0002] Magnesium-nickel alloys are easy to corrode. Taking advantage of this property, biodegradable nickel-magnesium alloys have been developed in recent years, which are used in shale gas exploitation. Magnesium-nickel alloy has good hydrogen storage performance and is the most promising substitute for LaNi in the future 5 hydrogen storage materials. High-quality magnesium-nickel master alloys are the basis for the application and development of nickel-containing magnesium alloys. [0003] Chinese patent CN1165631C discloses a kind of preparation Mg 2 The method for Ni hydrogen storage alloy specifically discloses a method for preparing magnesium-nickel alloy by using magnesium powder and nickel powder through mixing, pressing, and sintering processes, but the preparatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C23/00
CPCC22C1/03C22C23/00
Inventor 吕晶姚茂海李杰张晓梅何锋李俊辉
Owner HUNAN RARE EARTH METAL MATERIAL RES INST
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