公开(公告)号：WO2021123204A1

公开(公告)日：2021-06-24

申请号：PCT/EP2020/087073

申请日：2020-12-18

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB ,  AB SANDVIK COROMANT

Inventor： ARVANITIDIS, Ioannis ,  BLOMQVIST, Andreas ,  GARCIA, José-Luis ,  HOLMSTRÖM, Erik ,  LILJA, Mirjam

IPC: B22F3/24 ,  B24B31/03 ,  C21D1/06 ,  C22C29/06 ,  C22C29/08 ,  C23C30/00 ,  B22F3/16 ,  B22F5/00 ,  C21D7/04 ,  C21D9/22 ,  C23C24/04 ,  C23C26/00 ,  B22F2003/242 ,  B22F2005/001 ,  B22F2998/10 ,  B22F3/02 ,  B22F3/15 ,  B22F9/026 ,  B22F9/04 ,  C23C24/045

Abstract: The present invention relates to a method of treating a sintered mining insert comprising cemented carbide wherein said mining insert is subjected to a surface hardening process, characterized in that the surface hardening process is executed at an elevated temperature of or above 100°C. The invention further relates to a mining insert 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 x HV1bulk.

公开(公告)号：WO2021228974A1

公开(公告)日：2021-11-18

申请号：PCT/EP2021/062685

申请日：2021-05-12

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： LILJA, Mirjam ,  GARCIA, José Luis ,  BLOMQVIST, Andreas ,  ARVANITIDIS, Ioannis ,  HOLMSTRÖM, Erik

IPC: B22F3/24 ,  C22C1/05 ,  C22C29/08 ,  E21B10/00 ,  B24B31/03 ,  C21D1/06 ,  C21D9/22 ,  C22C29/06 ,  B22F5/00 ,  B22F3/16

Abstract: A method of redistributing the binder phase of a cemented carbide mining insert comprising a WC hard-phase component, optionally one or more further hard-phase components and a binder comprising the steps of providing a green cemented carbide mining insert; applying at least one binder puller selected from a metal oxide or a metal carbonate to only at least one local area of the 5 surface of the green cemented carbide insert; sintering the green carbide mining insert to form a sintered cemented carbide insert; and subjecting the sintered cemented carbide insert to dry tumbling process executed at an elevated temperature of or above 100°C, preferably at a temperature of or above 200°C, more preferably at a temperature of between 200°C and 450°C.