Material box for sintering neodymium iron boron

Abstract

The invention discloses a material box for sintering neodymium iron boron. The material box comprises a material box body. The material box body is a rectangular box body without an upper cover, and is made of carbon materials. Because the carbon material has the advantages of high temperature resistance, good heat conduction, good chemical stability and the like, the material box is particularly suitable for sintering a solid powder metallurgical product in a vacuum state; and moreover, the carbon material contains carbon elements and easily burns under a high-temperature environment, so that the technical difficulty in applying the carbon material to the sintering process of the neodymium iron boron exists, and a common enterprise dare not to have a try. By adopting the special process, the carbon material is made into a material box for sintering, which is applied to the sintering process of the neodymium iron boron, so that the technical defects and technical prejudice are overcome.

Description

technical field [0001] The invention relates to a material box for sintering NdFeB. Background technique [0002] The known material box for sintering NdFeB is made of steel plate or SUS304L (stainless steel). This type of material box has the advantage of low price and the disadvantage of easy deformation. When the sintering temperature of this material box reaches 1070~1115℃, With the increase of the sintering temperature, the bottom of the material box will sink under the pressure of 15~25Kg product, and the strength will decrease, causing the product to bend and deform; the contact surface between the product and the material box will be affected by friction during the contraction process. , The protrusions or depressions of the material box have high resistance, and because the expansion coefficients of the product and the material box are inconsistent, the product will have cracks, and even the corners will fall off, and the edge magnetic field will decrease. [0003]...

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Problems solved by technology

[0002] The known material box for sintering NdFeB is made of steel plate or SUS304L (stainless steel). This type of material box has the advantage of low price and the disadvantage of easy deformation. When the sintering temperature of this material box reaches 1070~1115℃, With the increase of the sintering temperature, the bottom of the material box will sink under the pressure of 15~25Kg product, and the strength will decrease, causing the product to bend and deform; the contact surface between the product and the material box will be affected by friction during the contraction process. , the protrusions or depressions of the material box have high resistance, and because the expansion coefficients of the product and the material box are inconsistent, the product will have cracks, or even the corners will fall off, and the edge magnetic field will decrease.

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