Development of trapezoid-shaped Nd-Fe-B die-upset magnets by preform method

Autor:	Shinoda Makoto, Katsunori Iwasaki, M. Akayama, Masaaki Tokunaga, Shigeho Tanigawa
Rok vydání:	1992
Předmět:	Fabrication Materials science business.product_category Isotropy Deformation (meteorology) Upset Electronic Optical and Magnetic Materials Stress (mechanics) Magnet Die (manufacturing) Electrical and Electronic Engineering Composite material Melt spinning business
Zdroj:	IEEE Transactions on Magnetics. 28:2850-2852
ISSN:	1941-0069 0018-9464
DOI:	10.1109/20.179648
Popis:	Basic investigations to apply the rapid quenched Nd-Fe-B die-upset technique to fabricate trapezoid-shaped magnets with high energy product were undertaken. Stress around the magnets with indentations during die-upsetting was evaluated by computer simulation. The dimensions of preform shape for isotropic consolidated magnets before hot deformation were determined from compression tests using an aluminum alloy. Hot deformation to obtain the final trapezoid-shape was divided into two steps. The total reduction in height during compression exceeded approximately 72%, and the finished magnets had no cracks. By this method, trapezoid-shaped die-upset magnets with a high energy product of >320 kJ/m/sup 3/ have been fabricated. >
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c965774c8b48f52719d4ce59ac919bcd https://doi.org/10.1109/20.179648 Zobrazit plný text záznamu