Patent ID: 11890769
Assignee: CERATIZIT COMO S.P.A.
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  F  C  Y | IPC B  C

Claim 9:
10. An ultrasonic knife, comprising:
a cutting portion formed with at least one cutting edge and a fastening portion formed with an external thread for connection to a sonotrode;
said cutting portion and said fastening portion being formed in one piece from cemented carbide material;
said cemented carbide material comprising hard particles, at least predominantly formed by tungsten carbide, and a metallic binder, and said cemented carbide material being composed of:
5.5-13 wt.-% Co, preferably 6.5-11 wt.-% Co;
a Cr content with a ratio of Cr/Co in wt.-% of 0.04≤Cr/Co≤0.06;
a Mo content with a ratio of Mo/Co in wt.-% of 0.02≤Mo/Co≤0.04;
a content of V and Cr relative to Co in wt.-% of 0.04≤(V+Cr)/Co≤0.07;
unavoidable impurities of in total ≤0.15 wt.-%; and
remainder WC.