Hartmetall und Schneidwerkzeug

Details

Veröffentlichungs-Nr.

EP4756054

Anmeldetag

28. Juli 2023

Veröffentlichung

6. Februar 2025

Rechtsraum

EP

IPC

C22C29/08, C22C1/051

Abstract

A cemented carbide comprising a plurality of tungsten carbide particles and a binder phase, wherein the cemented carbide comprises a total of 80% by volume or more of the tungsten carbide particles and the binder phase, the cemented carbide comprises 0.1% by volume or more and 20% by volume or less of the binder phase, the cemented carbide comprises at least one first element selected from the group consisting of titanium, tantalum, niobium, zirconium, cerium, yttrium, and boron, the cemented carbide comprises a total of 0.01 atomic % or more and 20 atomic % or less of the first element, and the binder phase comprises 50% by mass or more of cobalt, and wherein in a first graph showing results obtained by carrying out line analysis by using an energy dispersive X-ray spectrometer attached to a transmission electron microscope along a first direction going from the binder phase to the tungsten carbide particles adjacent to each other, in a coordinate system where an X axis is a distance from a position at which cobalt exhibits a maximum intensity, and a Y axis is a normalized intensity, a maximum peak M of each of the first element is present between a peak W1 of tungsten closest to an origin and a further peak W2 of tungsten closest to the peak W1, a ratio IB/IA of an intensity IB to a maximum peak intensity IA of the maximum peak M is more than 0.5 in each of the first element, and the intensity IB is an intensity of the first element at a distance P2, which is a distance of 0.2 nm from a distance P1 at the maximum peak intensity IA toward an opposite side of the origin.

Anmelder

Firma

Sumitomo Electric Industries, Ltd.

Land

🇯🇵 Japan

Fachgebiete