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.

Claims

10 · 1 independent · depth 5

10 granted claims

›1.independentA method of producing an R-T-B rare earth magnet, comprising:nforming a bulk body which includes an R-T-B rare earth alloy, wherein R: rare-earth elem…+9

›2.↳ 1The method according to claim 1, wherein the hot working is performed with a reduction ratio of 80% or higher.d2

›3.↳ 1The method according to claim 1, wherein, prior to the hot working, preliminary hot working is performed to form the bulk body.d2+5

›7.↳ 1The method according to claim 1, wherein, the hot working is hot pressing.d2

›8.↳ 1An R-T-B rare earth magnet produced by the method according to claim 1.d2

Classifications

7 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B22F3/14

Section C — Chemistry; metallurgy

C22C1/00
C22C38/10
C22C38/00

Section H — Electricity

H01F1/057
H01F7/02
H01F41/02

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Pendency

3.4 y

1,224 days filing → grant

Office actions

non-final + final

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1 RCE

Examiner

Bernard Rojas

art unit 2837 · TC 2800

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Citations: 16 back · 0 forward

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20130321112 A1	5 Dec 2013

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