Iron-rare earth-boron permanent magnets by hot working

(19)

(11)

EP 0 133 758 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	20.05.1987 Bulletin 1987/21

(43)	Date of publication A2:
	06.03.1985 Bulletin 1985/10

(21)	Application number: 84304731

(22)	Date of filing: 11.07.1984

(84)	Designated Contracting States:
	DE FR GB IT NL SE

(30)

Priority:

04.08.1983 US 520170

(71)	Applicant: GENERAL MOTORS CORPORATION
	()

(72)	Inventor:
	Lee, Robert Weir ()

(54)	Iron-rare earth-boron permanent magnets by hot working

(57) High energy product, magnetically anisotropic permanent magnets are produced by hot working over-quenched or fine grained, melt-spun materials comprising iron, neodymium and/or praseodymium, and boron to produce a fully densified, fine grained body that has undergone plastic flow.

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