EP 0317452 B1 19910814 - COMPOSITE DIAMOND-ABRASIVE PRODUCT, PROCESS FOR MANUFACTURING IT AND DRILLING OR FINISHING TOOLS PROVIDED THEREWITH
Title (en)
COMPOSITE DIAMOND-ABRASIVE PRODUCT, PROCESS FOR MANUFACTURING IT AND DRILLING OR FINISHING TOOLS PROVIDED THEREWITH
Publication
Application
Priority
FR 8716140 A 19871117
Abstract (en)
[origin: EP0317452A1] This abrasive product is of the type in which the active part consists of a sintered product comprising grains of diamond, each grain being linked directly to its neighbouring grains by bridging in order to have a polycrystalline structure, associated with a support essentially consisting of tungsten carbide. <??>According to the invention, the tungsten carbide support comprises a chromium binder phase representing from 6 to 15% by volume of the carbide; the relative proportions by weight of nickel and chromium in the binder phase vary within a range from 60 to 90% and from 40 to 100%. <??>The process for manufacturing this product consists: - in placing in a crucible a layer of grains of diamond which is intended to constitute the active layer of the product; - in placing on the layer thus formed a layer of tungsten carbide to which a nickel-chromium mixture is added, intended to constitute the support; - in subjecting the layer arrangement thus formed to a temperature and a pressure which are sufficient to cause the plastic-phase sintering of the grains of diamond and to bind the compact thus obtained to the support. <??>Drilling or machining tools equipped with the composite diamond- impregnated abrasive product according to the invention.
IPC 1-7
IPC 8 full level
B24D 3/00 (2006.01)
CPC (source: EP US)
B24D 3/001 (2013.01 - EP US); Y10S 76/12 (2013.01 - EP US); Y10S 428/932 (2013.01 - EP US); Y10T 407/27 (2015.01 - EP US); Y10T 428/12576 (2015.01 - EP US); Y10T 428/30 (2015.01 - EP US)
Citation (examination)
EP 0208414 A2 19870114 - DE BEERS IND DIAMOND [ZA]
Designated contracting state (EPC)
CH DE GB IT LI SE
DOCDB simple family (publication)
EP 0317452 A1 19890524; EP 0317452 B1 19910814; DE 3864240 D1 19910919; FR 2623201 A1 19890519; FR 2623201 B1 19930416; US 5002828 A 19910326
DOCDB simple family (application)
EP 88420383 A 19881116; DE 3864240 T 19881116; FR 8716140 A 19871117; US 27216388 A 19881116