公开(公告)号：US12098447B2

公开(公告)日：2024-09-24

申请号：US17041014

申请日：2019-03-22

申请人： SANDVIK MINING AND CONSTRUCTION TOOLS AB

发明人： Mirjam Lilja ,  Jose Maria Tarrago Cifre ,  Ida Borgh ,  Malin Martensson ,  Ioannis Arvanitidis ,  Krystof Turba

IPC分类号： C22C29/08 ,  B22F3/15 ,  B22F5/00 ,  B22F9/04 ,  C22C29/00

CPC分类号： C22C29/08 ,  C22C29/005 ,  B22F3/15 ,  B22F2005/001 ,  B22F9/04 ,  B22F2009/043 ,  B22F2301/15 ,  B22F2302/10

摘要： A rock drill insert made of cemented carbide includes hard constituents of tungsten carbide (WC) in a binder phase of Ni—Cr, or Ni—Co—Cr, and a balance of WC and unavoidable impurities. The cemented carbide has a 3.5-18 wt % binder phase. The binder phase has >0 wt % Ni. The mass ratio Cr/(Ni+Co) is 0.02-0.19. A 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：US11898213B2

公开(公告)日：2024-02-13

申请号：US17785482

申请日：2020-12-18

申请人： AB SANDVIK COROMANT ,  SANDVIK MINING AND CONSTRUCTION TOOLS AB

发明人： Ioannis Arvanitidis ,  Andreas Blomqvist ,  Jose Luis Garcia ,  Erik Holmstrom ,  Mirjam Lilja

IPC分类号： C21D1/06 ,  C21D7/04 ,  C21D9/22

CPC分类号： C21D1/06 ,  C21D7/04 ,  C21D9/22

摘要： A method of treating a sintered mining insert including cemented carbide includes the step of subjecting the mining insert to a surface hardening process. The surface hardening process is executed at an elevated temperature of or above 100° C. A mining insert is also provided, wherein the HV1 Vickers hardness measurement increase (HV1%) from the surface region, measured as an average of HV1 measurements taken at 100 μm, 200 μm and 300 μm below the surface, compared to the HV1 Vickers hardness measured in the bulk (HV1bulk), is at least 8.05-0.00350×HV1bulk.