EP0247985A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cemented carbide with a binder phase gradient and method of making the same
Assignee: Santrade Ltd
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Filing: 1987-04-29
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Granted: —
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Expires: 2007-04-29
Abstract
Abstract The present invention relates to a cemented carbide body, preferably for rock drilling, mineral cutting and wear parts, in which the content of binder phase in the surface is lower than the nominal one and in the centre higher than the nominal one. In the centre there is a zone having a uniform content of binder phase. The WC grain size is uniform throughout the body.
Inventors
- 👤 Udo Fischer
- 👤 Torbjörn Hartzell
- 👤 Jan Akerman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 23:24
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/08; C23; C23C; C23C30/00; C23C30/005; C23C8/00; C23C8/06; C23C8/08; C23C8/20; B; B22; B22F; B22F2998/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
Cemented carbide body preferably for rock drilling, mineral cutting and wear parts containing WC (alpha phase) and a binder phase (beta phase) based upon at least one of Co, Fe and Ni, characterized in, that the content of binder phase in the surface is 0.1-0.9 and in the centre at least 1.2, preferably 1.4-2.5, of the nominal content of binder phase and that the grain size of the alpha phase is uniform throughout the body.
Claim 2
Dependent Claim
75 words
Cemented carbide body preferably for rock drilling, mineral cutting and wear parts containing WC (alpha phase) and a binder phase (beta phase) based upon at least one of Co, Fe and Ni, characterized in, that the content of binder phase in the surface is 0.1-0.9 and in the centre at least 1.2, preferably 1.4-2.5, of the nominal content of binder phase and that the grain size of the alpha phase is uniform throughout the body.
Claim 3
Dependent Claim
39 words
Cemented carbide body according to claim 1, characterized in, that there in the centre is a zone of alpha + beta phase having a uniform content of binder phase and an extension of 0.05-0.5, preferably 0.1-0.3 of the diameter.
Claim 4
Dependent Claim
65 words
Method of making a cemented carbide body according to any of the preceding claims, characterized in, that a body with a uniformly distributed phase of carbides of metals of the alpha- and beta-phases, so called eta phase is prepared starting from an essentially homogeneous powder and that said body thereafter is carburized so that all the eta phase is transformed to alpha and beta phase.
References Cited (Backward Citations)
No citation records indexed.
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