Patent · US Active

Rock drill insert

US11285544B2 · kind B2 · utility

0Cited by

3References

13Claims

0Family size

Assignee

Sandvik Intellectual Property AB · SE

Inventors

Malin Mårtensson · Borås, SE
Ioannis ARVANITIDIS · Älta, SE
Krystof Turba · Nynäshamn, SE

Key dates

Filing date	Sep 25, 2017
Grant date	Mar 29, 2022
Priority date	—
Expiry date	Sep 25, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C2202/02
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A rock drill insert made of cemented carbide having hard constituents of tungsten carbide (WC) in a binder phase including Co, wherein the cemented carbide includes 4-18 mass % Co and a balance of WC and unavoidable impurities. The cemented carbide also includes Cr in such an amount that the mass ratio Cr/Co is within the range of 0.04-0.19, and the difference between the hardness at a 0.3 mm depth at any point of the surface of the rock drill insert and the hardness of the bulk of the rock drill insert is at least 40 HV3.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.