High-pressure smelting atomizing nitrogen-quenching device and method for utilizing device to produce samarium iron nitrogen alloy powder

A technology of alloy powder and nitrogen quenching, applied in the application field of high pressure powder metallurgy, can solve the problems of smelting and production development limitation of samarium iron nitrogen permanent magnet material, uneven and thorough nitriding of SmFe alloy, unstable magnetic properties of alloy powder, etc. Achieve the effect of good powder solidification quality, good powder quality and high powder nitrogen content

Active Publication Date: 2014-03-05
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0009] In short, the existing SmFeN permanent magnet material process is long and complicated, the reaction speed is slow, the equipment is complicated, and the production cost is high, which limits the smelting and production development of SmFeN permanent magnet materials.
SmFeN alloy powder is prepared by solid nitriding method, and the nitriding of SmFe alloy is often uneven and thorough, resulting in unstable magnetic properties of the alloy powder

Method used

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  • High-pressure smelting atomizing nitrogen-quenching device and method for utilizing device to produce samarium iron nitrogen alloy powder

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Embodiment 1

[0040] A high-pressure smelting atomized nitrogen quenching device suitable for producing samarium-iron-nitrogen alloy powder: the high-pressure smelting chamber in the upper part of the main furnace body of the high-pressure smelting atomized nitrogen quenching device in this embodiment is 400 mm high, 300 mm in inner diameter, and 10 mm in wall thickness; The quenching chamber is 500mm high, the inner diameter is 300mm, the wall thickness is 10mm, and the bottom inverted cone is 150mm high. The furnace shell is equipped with a pressure gauge with a maximum range of 6MPa. The crucible 6 of the master alloy melting system is fixed in the melting chamber. The upper part is cylindrical, with a diameter of 100mm and a height of 60mm, and the lower part is an inverted cone, with a diameter of 100mm and a height of 40mm; 8mm, jacket with insulation cotton; crucible 6 is provided with stopper 2, 150mm in length and 10mm in diameter, made of zirconium carbon, the head is closely matc...

Embodiment 2

[0047] A high-pressure smelting atomized nitrogen quenching device suitable for producing samarium-iron-nitrogen alloy powder: the high-pressure smelting chamber in the upper part of the main furnace body of the high-pressure smelting atomized nitrogen quenching device in this embodiment is 800 mm high, 600 mm in inner diameter, and 10 mm in wall thickness; The quenching chamber is 1000mm high, the inner diameter is 600mm, the wall thickness is 10mm, and the bottom inverted cone is 300mm high. The furnace shell is equipped with a pressure gauge with a maximum range of 6MPa. The crucible 6 of the master alloy smelting system is fixed in the smelting chamber. The upper part is cylindrical, with a diameter of 200mm and a height of 120mm, and the lower part is an inverted conical shape with a diameter of 200mm and a height of 80mm; 8mm, jacketed with thermal insulation cotton; the crucible 6 is provided with a plug 2, 300mm long and 15mm in diameter, made of zirconium carbon, the ...

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Abstract

Provided are a high-pressure smelting atomizing nitrogen-quenching device and a method for utilizing the device to produce samarium iron nitrogen alloy powder. The high-pressure smelting atomizing nitrogen-quenching device comprises a high-pressure control system, a master alloy smelting system and an atomizing nitrogen-quenching system. The high-pressure control system is mainly composed of a high-pressure furnace body, a pressure control device and a vacuum pumping device. The master alloy smelting system is mainly composed of a crucible, an infrared temperature measurement device and an induction heating device. The method for utilizing the high-pressure smelting atomizing nitrogen-quenching device to produce the samarium iron nitrogen alloy powder comprises the steps of high-pressure smelting, atomization into drops, high-pressure nitrogen quenching and powder collection. The high-pressure smelting atomizing nitrogen-quenching device is simple and scientific in structure, the content of nitrogen in the produced powder is high, powder solidification quality is good, and smelting atomization and nitrogen quenching are finished in an identical container rapidly and conveniently.

Description

technical field [0001] The invention belongs to the application field of high-pressure powder metallurgy, in particular to a high-pressure smelting atomized nitrogen quenching device and a method for manufacturing samarium-iron-nitrogen alloy powder under high-pressure conditions, and is particularly suitable for manufacturing samarium-iron-nitrogen permanent magnet materials required for Samarium iron nitrogen alloy powder. Background technique [0002] There have been three generations of rare earth permanent magnet materials. At present, the vast majority of rare earth permanent magnets are NdFeB, and the performance of SmFeN-based materials has been proved to exceed that of NdFeB-based materials. Samarium iron nitrogen is a kind of permanent magnet material with excellent performance. In 1990, J. M. D. Coey et al. of Ireland discovered R 2 Fe 17 The compound irreversibly absorbs a large amount of N through the gas-solid phase reaction above 300 °C 2 Formation of a new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 王书桓赵定国
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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