Global Patent Index - EP 0881958 B1

EP 0881958 B1 2001-05-30 - MATERIAL FOR THE POWDER-METALLURGICAL PRODUCTION OF SHAPED PARTS, IN PARTICULAR VALVE SEAT RINGS OR VALVE GUIDES WITH HIGH RESISTANCE TO WEAR

Title (en)

MATERIAL FOR THE POWDER-METALLURGICAL PRODUCTION OF SHAPED PARTS, IN PARTICULAR VALVE SEAT RINGS OR VALVE GUIDES WITH HIGH RESISTANCE TO WEAR

Title (de)

WERKSTOFF ZUR PULVERMETALLURGISCHEN HERSTELLUNG VON FORMTEILEN, INSBESONDERE VON VENTILSITZRINGEN ODER VENTILFÜHRUNGEN MIT HOHER VERSCHLEISSFESTIGKEIT

Title (fr)

MATERIAU S'UTILISANT EN METALLURGIE DES POUDRES POUR PRODUIRE DES PIECES MOULEES, NOTAMMENT DES SIEGES DE SOUPAPE RAPPORTES OU DES GUIDES DE SOUPAPE TRES RESISTANTS A L'USURE

Publication

EP 0881958 B1 (DE)

Application

EP 97905071 A

Priority

  • DE 19606270 A
  • EP 9700837 W

Abstract (en)

[origin: DE19606270A1] The invention concerns a material for the powder-metallurgical production from a powder mixture containing at least approximately 50 wt.% copper in particular of valve seat rings or valve guides with high resistance to wear and corrosion and high heat conductivity. The starting powder mixture consists of between 50 and 90 wt.% of a basic powder, containing the copper portion, and between 10 and 50 wt.% of a powdery molybdenum-containing alloy flux. The basic powder is a copper powder which is dispersion-hardened by Al2O3, has an Al2O3 content of between 0.1 and 1.1 wt.%, and is produced by pulverizing a Cu-Al melt followed by heating in an oxidizing atmosphere. The invention further concerns the use of a dispersion-hardened powder of this type for the powder-metallurgical production in particular of wear and corrosion-resistant valve seat rings or valve guides with high heat conductivity. Finally, the invention concerns a method of producing such valve seat rings or valve guides.

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

B22F 1/00; C22C 32/00

IPC 8 full level (invention and additional information)

B22F 1/00 (2006.01); B22F 5/00 (2006.01); C22C 1/04 (2006.01); C22C 9/00 (2006.01); C22C 9/01 (2006.01); C22C 32/00 (2006.01)

CPC (invention and additional information)

B22F 1/0003 (2013.01); C22C 9/00 (2013.01); C22C 19/07 (2013.01); C22C 27/04 (2013.01); C22C 32/0021 (2013.01); C22C 33/02 (2013.01)

Designated contracting state (EPC)

DE

EPO simple patent family

DE 19606270 A1 19970828; EP 0881958 A1 19981209; EP 0881958 B1 20010530; JP 2001500567 A 20010116; JP 4272706 B2 20090603; US 6039785 A 20000321; WO 9730808 A1 19970828

INPADOC legal status


2017-02-21 [REG DE R071] EXPIRY OF RIGHT

- Document: DE 59703672

2016-04-29 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20160226

- Year of fee payment: 20

2002-05-22 [26N] NO OPPOSITION FILED

2001-07-05 [REF] CORRESPONDS TO:

- Document: DE 59703672 20010705

2001-05-30 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE

2000-07-12 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20000530

1998-12-09 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980826

1998-12-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE