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US 9,070,508 B2Granted
Method producing rare earth magnet
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNoritaka Miyamoto, Akira Manabe, Tetsuya Shoji, Daisuke Ichigozaki
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Abstract
A method of producing an R-T-B rare earth magnet that include forming an R-T-B (R: rare-earth element, T: Fe, or Fe and partially Co that substitutes for part of Fe) rare earth alloy powder into a compact and performing hot working on the compact, wherein the hot working is performed in a direction that is different from the direction in which the forming was performed.
Claims10
A method of producing an R-T-B rare earth magnet, comprising:
- forming a bulk body which includes an R-T-B rare earth alloy, wherein R:
- rare-earth element, and T:
- Fe, or Fe and partially Co that substitutes for part of Fe, and which has a crystal grain structure, by hot press molding;
- and
- performing hot working on the bulk body in a direction that is different by an angle within a range between 60° and 90° inclusive from the direction in which the hot press molding was performed, and with a reduction ratio of 60% or higher.
2 more elements
Dependencies are inferred from the claim text.