Method and apparatus for producing magnetically anisotropic Nd-Fe-B magnet material
US4985086A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Jun 2, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/0253
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of producing a magnetically anisotropic Nd-Fe-B magnet material comprising the steps of: charging a green body produced by pressing a flaky or powdery material consisting of an amorphous alloy and/or a finely crystallized alloy, into a cavity defined by a die having a hole extending therethrough, a lower plunger inserted into said hole, and an upper plunger having a larger diameter than that of said hole; pressing said green body by elevating said lower plunger while keeping a temperature thereof (pressing temperature) at 600.degree.-850.degree.; elevating the resulting pressed body by elevating said lower plunger while heating; and upsetting said pressed body while keeping a temperature thereof (upsetting temperature) at 600.degree.-850.degree. C. to provide it with magnetic anisotropy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.