열처리 온도에 따른 NdFeB계 자석의 탈자 및 분별 연구

In this study, demagnetization heat treatment conditions were studied for recycling and reuse of waste NdFeB magnets. The specimens used four different Nd magnets of N, H, UH and AH grades. To investigate the heat treatment conditions of a Nd magnet, a thermal flow computational simulation was perfo...

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Bibliographic Details
Published in한국생산제조학회지 Vol. 30; no. 2; pp. 119 - 126
Main Authors 김병준(Byeong Jun Kim), 박익근(Ik Keun Park), 김용성(Young Sung Kim)
Format Journal Article
LanguageKorean
Published 한국생산제조학회 01.04.2021
Subjects
기계공학
Heat treatment
Recycling
NdFeB
Magnet
Demagnetization
Classification
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ISSN2508-5093
2508-5107
DOI10.7735/ksmte.2021.30.2.119

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Summary:In this study, demagnetization heat treatment conditions were studied for recycling and reuse of waste NdFeB magnets. The specimens used four different Nd magnets of N, H, UH and AH grades. To investigate the heat treatment conditions of a Nd magnet, a thermal flow computational simulation was performed to determine the exact temperature change of the magnet specimen according to the heat treatment time change at an ambient temperature inside a heat treatment furnace. It was determined that the content of elements existing inside the magnet, such as expensive heavy rare earths Dy and Tb, could be predicted by examining the rate of decrease in magnetic flux density at each heat treatment temperature. KCI Citation Count: 1
ISSN:2508-5093
2508-5107
DOI:10.7735/ksmte.2021.30.2.119