Global Patent Index - EP 1319090 A1

EP 1319090 A1 2003-06-18 - PRODUCTION OF A HARD METAL BODY WITH HARDNESS GRADIENT, SUCH AS PUNCHING TOOLS

Title (en)

PRODUCTION OF A HARD METAL BODY WITH HARDNESS GRADIENT, SUCH AS PUNCHING TOOLS

Title (de)

HERSTELLUNG EINES HARTMETALLKÖRPERS MIT GRADIERTER HÄRTE, WIE ZUM BEISPIEL STANZWERKZEUGE

Title (fr)

PRODUCTION D'UN CORPS EN METAL DUR A GRADIENT DE DURETE, TELS DES OUTILS DE POIN ONNAGE

Publication

EP 1319090 A1 (EN)

Application

EP 01975020 A

Priority

  • NL 0100660 W
  • NL 1016112 A

Abstract (en)

[origin: WO0220863A1] The invention relates to a method for the production of a body made of hard metal, consisting of a hard compound A and a binder B, wherein pulverulent A and B, or an optionally precompacted article that contains A and B, are introduced into a container and the material containing A and B is compacted in order to increase the relative density (RD) to a value that is higher than 70% of the theoretical maximum density (TMD). The invention further relates to a body of hard metal comprising a hard compound A and a binder B, the mass ratio of A:B gradually changing over a cross-section of the body in order to impart to said body different mechanical properties in one zone Za or to one end (T) and hardness in one zone Zb or to another end (H). The invention also relates to the use of dynamic compaction techniques for the production of such bodies.

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

C22C 1/05; B22F 3/08; B22F 7/02

IPC 8 full level (invention and additional information)

B22F 3/08 (2006.01); B22F 7/02 (2006.01); C22C 1/05 (2006.01)

CPC (invention and additional information)

C22C 1/051 (2013.01); B22F 3/08 (2013.01); B22F 7/02 (2013.01); B22F 2998/00 (2013.01)

Combination set (CPC)

B22F 2998/00 + B22F 3/087

Citation (search report)

See references of WO 0220863A1

Designated contracting state (EPC)

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

EPO simple patent family

WO 0220863 A1 20020314; AU 9438901 A 20020322; CA 2421429 A1 20020314; EP 1319090 A1 20030618; NL 1016112 C2 20020307; US 2004093985 A1 20040520

INPADOC legal status


2006-06-14 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20051125

2005-08-03 [RTI1] TITLE (CORRECTION)

- Free text: PRODUCTION OF A HARD METAL BODY WITH HARDNESS GRADIENT, SUCH AS PUNCHING TOOLS

2004-05-26 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20040415

2003-06-25 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: CARTON, ERIK, PETER

2003-06-25 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: VAN EIJKEREN, ERIC, PETERUS, HYACINTUS, MARIA

2003-06-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20030304

2003-06-18 [AK] DESIGNATED CONTRACTING STATES:

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

2003-06-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL LT LV MK RO SI