Global Patent Index - EP 2641675 A1

EP 2641675 A1 2013-09-25 - Sintered composite body comprising cemented carbide and cBN grains

Title (en)

Sintered composite body comprising cemented carbide and cBN grains

Title (de)

Sinterverbundkörper mit Zementkarbid und Körnern aus kubischem Bornitrid

Title (fr)

Corps composite fritté comportant du carbure cimenté et des grains cBN

Publication

EP 2641675 A1 (EN)

Application

EP 12160972 A

Priority

EP 12160972 A

Abstract (en)

The present invention relates to a sintered composite body comprising cemented carbide and cBN grains, wherein the cBN grains are dispersed in a cemented carbide matrix. Said body further comprises a cBN depleted zone extending from the surface of the body and 50-400 µm towards the core of the body and the mean cBN grain size outside the depleted zone is 1-20 µm and the cBN content outside the depleted zone is 0.3-4 wt%.

IPC 8 full level (invention and additional information)

B22F 7/06 (2006.01); B22F 7/08 (2006.01); B23B 27/02 (2006.01); B23B 27/14 (2006.01); C22C 29/08 (2006.01)

CPC (invention and additional information)

C22C 1/051 (2013.01); C22C 29/08 (2013.01); B22F 2009/043 (2013.01); C22C 14/00 (2013.01); Y10T 83/9319 (2015.04)

Citation (applicant)

EP 0256829 A2 19880224 - DE BEERS IND DIAMOND [ZA]

Citation (search report)

[E] EP 2433727 A1 20120328 - SANDVIK INTELLECTUAL PROPERTY [SE]

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

EPO simple patent family

EP 2641675 A1 20130925; US 2015082963 A1 20150326; WO 2013139603 A1 20130926

INPADOC legal status


2014-09-17 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20140326

2014-04-30 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20140325

2014-04-30 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2013-09-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2013-09-25 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: BA ME