EP 0088992 A3 19841219 - METHOD FOR MANUFACTURING AN OBJECT OF SOFT-MAGNETIC MATERIAL BY BONDING TOGETHER A MASS OF POWDER GRAINS
Title (en)
METHOD FOR MANUFACTURING AN OBJECT OF SOFT-MAGNETIC MATERIAL BY BONDING TOGETHER A MASS OF POWDER GRAINS
Publication
Application
Priority
SE 8201678 A 19820317
Abstract (en)
[origin: EP0088992A2] A method for manufacturing an object of soft-magnetic material by bonding together a mass of powder grains of iron-based soft-magnetic material in the form of pure iron or in the form of iron containing silicon, aluminium and/or titanium. The grains are provided either with a coating (2) containing iron oxide chemically bonded to the grains and, at least in those cases where the iron-based material consists of pure iron, containing in addition thereto an oxide of silicon, aluminium and/or titanium, or the grains are provided with a coating (2) containing a reaction product of iron oxide, which oxide is chemically bonded to the grains, and an oxide of silicon, aluminium and/or titanium. The grains provided with said coating are subjected to an isostatic pressing at a temperature of at most 900 DEG C and at a pressure necessary for forming a coherent, compact body of the powder mass. The coating preferably has a thickness of 0.01 - 0.5 mu m.
IPC 1-7
IPC 8 full level
B22F 1/00 (2006.01); B22F 1/02 (2006.01); B22F 1/16 (2022.01); B22F 3/15 (2006.01); H01F 1/14 (2006.01); H01F 1/24 (2006.01); H01F 1/33 (2006.01)
CPC (source: EP US)
B22F 1/16 (2022.01 - EP US); B22F 3/15 (2013.01 - EP); H01F 1/24 (2013.01 - EP US); H01F 1/33 (2013.01 - EP)
Citation (search report)
- [Y] US 3814598 A 19740604 - GABRIEL J, et al
- [Y] US 1669648 A 19280515 - FRANCIS BANDUR ADOLPH
- [Y] FR 2391018 A1 19781215 - CARPENTER TECHNOLOGY CORP [US]
- [A] US 2068658 A 19370126 - COX IRVIN W
- [A] US 2531445 A 19501128 - EDWARD LAYCOCK WILLIAM
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0088992 A2 19830921; EP 0088992 A3 19841219; JP S58171501 A 19831008; SE 8201678 L 19830918
DOCDB simple family (application)
EP 83102285 A 19830309; JP 4302883 A 19830315; SE 8201678 A 19820317