EP 1364732 B1 20080305 - Hard metal part with graded structure
Title (en)
Hard metal part with graded structure
Title (de)
Hartmetallbauteil mit gradiertem Aufbau
Title (fr)
Elément en métal dur avec structure graduée
Publication
Application
Priority
AT 2452002 U 20020417
Abstract (en)
[origin: JP2003328067A] <P>PROBLEM TO BE SOLVED: To provide a structural member made of a cemented carbide and manufactured by a powder metallurgy process, in which at least one additive for controlling growth of crystals of V, Cr, Ti, Ta and Nb, shows a concentration transition in a step-by-step manner at least partially, and thereby the mechanical characteristics show the gradual change, and to provide a method for manufacturing the structural member. <P>SOLUTION: The manufacturing method is characterized by applying a dispersion liquid or a solution, which includes a finely dispersed or dissolved additive for inhibiting growth of the crystals, on the surface of a roughly processed workpiece. The dispersion liquid or the solution intrudes into the inside of the roughly processed workpiece along opening gaps, and thereby the additive for controlling growth of the crystals is dispersed into the roughly processed workpiece in a step-by-step manner. In addition, the additive uniformly dispersed in the state of the solution into the roughly processed workpiece, can be gradually removed from the vicinity of a perimeter of the roughly processed workpiece by heat treatment or with a solvent. <P>COPYRIGHT: (C)2004,JPO
IPC 8 full level
B22F 7/02 (2006.01); B22F 3/10 (2006.01); C22C 1/05 (2006.01); C22C 29/02 (2006.01); C22C 29/08 (2006.01)
CPC (source: EP US)
B22F 7/02 (2013.01 - EP US); C22C 1/051 (2013.01 - EP US); C22C 29/02 (2013.01 - EP US); C22C 29/08 (2013.01 - EP US); B22F 2999/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
AT 5837 U1 20021227; AT E387978 T1 20080315; CN 100482836 C 20090429; CN 1480543 A 20040310; DE 50309292 D1 20080417; EP 1364732 A2 20031126; EP 1364732 A3 20051221; EP 1364732 B1 20080305; IL 155430 A0 20031123; IL 155430 A 20090504; JP 2003328067 A 20031119; US 2004009088 A1 20040115; US 2008075621 A1 20080327; US 7537726 B2 20090526
DOCDB simple family (application)
AT 2452002 U 20020417; AT 03008539 T 20030414; CN 03147218 A 20030417; DE 50309292 T 20030414; EP 03008539 A 20030414; IL 15543003 A 20030414; JP 2003106153 A 20030410; US 41748703 A 20030417; US 86912707 A 20071009