The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2022
Filed:
Sep. 25, 2017
Applicant:
Sandvik Intellectual Property Ab, Sandviken, SE;
Inventors:
Assignee:
SANDVIK INTELLECTUAL PROPERTY AB, Sandviken, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 27/14 (2006.01); B22F 3/15 (2006.01); B22F 3/24 (2006.01); B22F 9/02 (2006.01); B22F 9/04 (2006.01); B22F 5/00 (2006.01);
U.S. Cl.
CPC ...
B23B 27/148 (2013.01); B22F 3/15 (2013.01); B22F 3/24 (2013.01); B22F 9/026 (2013.01); B22F 9/04 (2013.01); B22F 2005/001 (2013.01); B22F 2202/01 (2013.01); B22F 2302/10 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); B23B 2222/28 (2013.01);
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.