公开(公告)号：US20240295012A1

公开(公告)日：2024-09-05

申请号：US18578454

申请日：2022-07-08

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： Malin MARTENSSON ,  Carl-Johan MADERUD ,  Anders NORDGREN ,  Jose Luis GARCIA

IPC: C22C29/08 ,  B22F3/15 ,  B22F3/24 ,  B22F5/00 ,  B22F9/02 ,  B22F9/04 ,  C22C1/051 ,  C22C29/06 ,  E21B10/56

CPC classification number: C22C29/08 ,  B22F3/15 ,  B22F3/24 ,  B22F5/00 ,  B22F9/026 ,  B22F9/04 ,  C22C1/051 ,  C22C29/067 ,  E21B10/56 ,  B22F2005/001 ,  B22F2009/043 ,  B22F2301/15 ,  B22F2302/10 ,  B22F2998/10 ,  B22F2999/00

Abstract: A sintered cemented carbide insert for mining or cutting applications includes a mean WC grain size of between 0.8-18 μm, a binder phase in a weight between 4-18 wt %, a gamma phase with the cubic gamma phase precursors in a weight of between 0.8-10 wt %, and any unavoidable impurities and a balance of WC. A difference between the hardness at any point 0.3 mm from the surface of the insert and the hardness of the bulk is at least 25 HV3, wherein hardness is measured according to ISO EN6507. A method of producing the cemented carbide is also provided.

公开(公告)号：US20230184110A1

公开(公告)日：2023-06-15

申请号：US17924394

申请日：2021-05-12

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： Mirjam LILJA ,  Jose Luis GARCIA ,  Andreas BLOMQVIST ,  Ioannis ARVANITIDIS ,  Erik HOLMSTROM

IPC: E21C35/183 ,  C22C1/051 ,  C22C29/08 ,  C22C29/06

CPC classification number: E21C35/1835 ,  C22C1/051 ,  C22C29/08 ,  C22C29/067

Abstract: A method of redistributing the binder phase of a cemented carbide mining insert having a WC hard-phase component, optionally one or more further hard-phase components and a binder includes 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 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.

公开(公告)号：US20230036990A1

公开(公告)日：2023-02-02

申请号：US17785482

申请日：2020-12-18

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

Inventor： Ioannis ARVANITIDIS ,  Andreas BLOMQVIST ,  Jose Luis GARCIA ,  Erik HOLMSTROM ,  Mirjam LILJA

IPC: C21D1/06 ,  C21D7/04 ,  C21D9/22

Abstract: 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.