SYSTEM FOR PERIPHERAL DIFFERENTIAL HEAT TREATMENT TO FORM DUAL-PROPERTY WORKPIECES - Patent 0365543

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EP 0 365 543 A1

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(43)	Date of publication:
	02.05.1990 Bulletin 1990/18

(21)	Application number: 88904744.0

(22)	Date of filing: 23.03.1988

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International Patent Classification (IPC):

C21D 1/ 46^{( . )}
C22F 1/ 10^{( . )}

C22F 1/ 00^{( . )}
C22F 1/ 18^{( . )}

(86)	International application number:
	PCT/US1988/000925

(87)	International publication number:
	WO 1988/007595 (06.10.1988 Gazette 1988/22)

(84)	Designated Contracting States:
	AT BE CH DE FR GB IT LI LU NL SE

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Priority:

24.03.1987 US 19870029615

(71)	Applicant: WYMAN-GORDON COMPANY
	Worcester, MA 01610 (US)

(72)	Inventor:
	COUTS, Wilford, H., Jr. Northboro, MA 01532 (US)

(74)	Representative: Godwin, Edgar James
	MARKS & CLERK, 57-60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)

(54)	SYSTEM FOR PERIPHERAL DIFFERENTIAL HEAT TREATMENT TO FORM DUAL-PROPERTY WORKPIECES