Global patent index - EP 0963591 A4

EP 0963591 A4 2000-11-29 - METHOD FOR MAKING SOFT MAGNETIC PARTS FROM PARTICULATE FERROUS MATERIAL, AND PARTS MADE THEREFROM

Title (en)

METHOD FOR MAKING SOFT MAGNETIC PARTS FROM PARTICULATE FERROUS MATERIAL, AND PARTS MADE THEREFROM

Title (de)

VERFAHREN ZUM PRODUZIERUNG VON WEICHMAGNETISCHEN TEILEN AUS KÖRNIGEN EISENWERKSTOFF, UND TEILE DARAUS

Title (fr)

PROCEDE DE FABRICATION DE BRIQUETTES MAGNETIQUES MOLLES A PARTIR D'UNE MATIERE PARTICULAIRE FERREUSE, ET ELEMENTS FABRIQUES A PARTIR DE CES BRIQUETTES

Publication

EP 0963591 A4 (EN)

Application

EP 98910087 A

Priority

  • US 9803848 W
  • US 3941097 P

Abstract (en)

[origin: WO9838655A1] A method is provided for making soft magnetic parts from particulates of ferrous material. The methods includes the following steps. Providing a plurality of ferrous particles and coating at least one substantially uniform layer of from about 0 wt.% to about 15 wt.% of a metal onto each of the particles. The coated particles are consolidated to form a part, and the part is heated at a temperature and for a time period sufficient to promote the formation of intermetallic phases between the metal layer and the ferrous particle at the boundary therebetween. The intermetallic phases have an electrical resistivity of greater than about 100 ohms/mil-ft.

IPC 1-7 (main, further and additional classification)

H01F 1/22; B22F 1/02; B22F 3/02; B32B 15/02; C22C 33/02; H01F 41/02; H02K 15/12

IPC 8 full level (invention and additional information)

B22F 1/00 (2006.01); B22F 1/02 (2006.01); B22F 3/23 (2006.01); C22C 33/02 (2006.01); H01F 1/22 (2006.01); H01F 41/02 (2006.01)

CPC (invention and additional information)

C22C 33/02 (2013.01); B22F 1/025 (2013.01); B22F 3/23 (2013.01); H01F 1/22 (2013.01); H01F 41/0246 (2013.01); B22F 2998/10 (2013.01)

Combination set (CPC)

B22F 2998/10 + B22F 9/082 + B22F 1/025 + B22F 3/23

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9838655 A1 19980903; AU 6441798 A 19980918; CA 2282527 A1 19980903; EP 0963591 A1 19991215; EP 0963591 A4 20001129; JP 2001524262 A 20011127

INPADOC legal status

2003-03-05 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020902

2000-11-29 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20001016

2000-11-29 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-11-29 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7H 01F 1/22 A, 7B 22F 1/02 B, 7B 22F 3/02 B, 7C 22C 33/02 B, 7B 32B 15/02 B, 7H 02K 15/12 B, 7H 01F 41/02 B

1999-12-15 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990921

1999-12-15 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE