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The Method of Improving the Alloy Yield Rate in Strip Swing Process

A technology of alloy yield and alloy, which is applied in the field of improving alloy yield and improving alloy yield in stripping process, can solve the problems of reducing alloy yield, large volume of melting furnace, high cost, etc., and achieves improvement of alloy yield Yield, on-site operability, and the effect of reducing production costs

Active Publication Date: 2020-03-06
廊坊京磁精密材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional smelting production, the lost part is directly used as scrap and directly put into the scrap warehouse, which will undoubtedly reduce the alloy yield and increase the production cost
In order to improve the alloy yield, the usual way is to increase the vacuum degree of the smelting furnace and reduce the amount of slag formed in the smelting process. This method has the following problems: (1) The volume of the smelting furnace is large, and increasing the vacuum degree of the smelting furnace has a negative effect on The requirements for equipment are extremely high, and it is often necessary to upgrade the melting furnace, which is costly and difficult to maintain
In summary, increasing the vacuum degree of the smelting furnace is not only costly, but also has very limited effect on reducing the amount of slag

Method used

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  • The Method of Improving the Alloy Yield Rate in Strip Swing Process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add residual steel with the same formula as the alloy to the alloy. The amount of residual steel added is 1.5% of the weight of the alloy, and then heated and melted to obtain a liquid mixture. When the temperature of the liquid mixture is 1480°C, pour the liquid mixture , to get the strip strip, when the temperature of the strip strip drops to 80°C, remove it, and measure the alloy yield and magnetic properties (including remanence Br, intrinsic coercive force Hcj, squareness Hk / Hcj) of the strip strip ); the residual steel is the part where the liquid alloy splashes on the runner and adheres to the inner wall of the runner after solidification.

[0026] Among them, after the strip sheet was produced in the previous heat, the residual steel was collected, classified and pretreated according to the formula and grade of the alloy used in the previous heat; the above pretreatment process included: using steel with a diameter of 0.5mm The pellets are used to polish the res...

Embodiment 2

[0028] Add residual steel with the same formula as the alloy to the alloy. The amount of residual steel added is 1.0% of the weight of the alloy, and then heated and melted to obtain a liquid mixture. When the temperature of the liquid mixture is 1400 ° C, the liquid mixture is poured , to get the strip strip, when the temperature of the strip strip drops to 80°C, remove it, and measure the alloy yield and magnetic properties (including remanence Br, intrinsic coercive force Hcj, squareness Hk / Hcj) of the strip strip ); the residual steel is the part where the liquid alloy splashes on the runner and adheres to the inner wall of the runner after solidification.

[0029] Among them, after the strip sheet was produced in the previous heat, the residual steel was collected, classified and pretreated according to the formula and grade of the alloy used in the previous heat; the above pretreatment process included: using steel with a diameter of 1.0mm The pellets are used to polish ...

Embodiment 3

[0031] Add residual steel with the same grade as the alloy to the alloy. The amount of residual steel added is 0.5% of the weight of the alloy, and then heated and melted to obtain a liquid mixture. When the temperature of the liquid mixture is 1450 ° C, the liquid mixture is poured , to get the strip strip, when the temperature of the strip strip drops to 80°C, remove it, and measure the alloy yield and magnetic properties (including remanence Br, intrinsic coercive force Hcj, squareness Hk / Hcj) of the strip strip ); the residual steel is the part where the liquid alloy splashes on the runner and adheres to the inner wall of the runner after solidification.

[0032] Among them, after the strip sheet was made in the previous heat, the residual steel was collected, classified and pretreated according to the formula and grade of the alloy used in the previous heat; the above pretreatment process included: using steel with a diameter of 1.5mm The pellets are used to polish the re...

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Abstract

The invention provides a method for improving alloy yield in the melt-spinning process. The method includes the steps: adding residual steel in an alloy; heating and melting mixture to obtain liquid mixture; pouring the liquid mixture to obtain melt-spinning sheets when the temperature of the liquid mixture reaches 1300-1500 DEG C. The residual steel and the alloy have the same formulas or marks,the residual steel accounts for 0.2-2% of the weight of the alloy, and liquid alloys are splashed on a runner and adhered on the inner wall of the runner after being solidified to obtain the residualsteel. According to the method, the alloy yield in the melt-spinning process can be improved, magnetic performance of the melt-spinning sheets cannot be affected, resources are saved, cost is reduced,and the method is simple to operate and can be applied to mass production.

Description

technical field [0001] The invention relates to a method for improving alloy yield. More specifically, the present invention relates to a method for increasing the yield rate of alloy in strip-spinning process, which belongs to the technical field of sintered NdFeB. Background technique [0002] Sintered NdFeB, as the third generation permanent magnet, has been widely used in electronic information, medical treatment, wind power generation, new energy vehicles and other fields. Stripping (or smelting) process, as the first process of sintered NdFeB production, has an important impact on the performance of magnets. At the same time, since the mass fraction of rare earth in NdFeB magnets is as high as 33%, the alloy yield in the production process of stripping strips Yield plays a pivotal role in production cost control. At present, the yield of the alloy in the stripping process is about 97.5%, and the lost 2.5% is composed of the following: (1) slagging during the smelting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/06B22D11/16H01F1/057H01F1/08H01F41/02
CPCB22D11/06B22D11/16H01F1/0577H01F41/0253
Inventor 张英伟
Owner 廊坊京磁精密材料有限公司
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