公开(公告)号：WO2019185481A1

公开(公告)日：2019-10-03

申请号：PCT/EP2019/057265

申请日：2019-03-22

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： LILJA, Mirjam ,  TARRAGÒ CIFRE, José, Maria ,  BORGH, Ida ,  MÅRTENSSON, Malin ,  ARVANITIDIS, Ioannis ,  TURBA, Krystof

IPC: C22C29/08 ,  C04B35/56 ,  B22F5/00 ,  C04B35/626 ,  C04B35/63 ,  C04B35/634 ,  C04B35/645 ,  C22C29/00

Abstract: A rock drill insert made of cemented carbide that comprises hard constituents of tungsten carbide (WC) in a binder phase of Ni-Cr, or Ni-Co-Cr, and balance WC and unavoidable impurities, wherein the cemented carbide comprises 3.5-18 wt% binder phase, the binder phase comprises > 0 wt% Ni, the mass ratio Cr/(Ni+Co) is 0.02- 0.19, the difference between the hardness at 0.3 mm depth at some point of the surface of the rock drill insert and the minimum hardness of the bulk of the rock drill insert is at least 30 HV3.

公开(公告)号：WO2021005076A1

公开(公告)日：2021-01-14

申请号：PCT/EP2020/069163

申请日：2020-07-08

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： LILJA, Mirjam ,  BORGH, Ida ,  ARVANITIDIS, Ioannis ,  ÅKESSON, Leif ,  HAI, Xueying ,  NORGREN, Susanne

IPC: C22C1/05 ,  C22C29/08 ,  B22F5/00

Abstract: The present disclosure relates method of making a cemented carbide mining insert, a cemented carbide mining insert with having a chemical and hardness gradient and to the use thereof wherein the cemented carbide mining insert comprises Cr.