US 11,898,213 B2
Method of treating a mining insert
Ioannis Arvanitidis, Stockholm (SE); Andreas Blomqvist, Stockholm (SE); Jose Luis Garcia, Stockholm (SE); Erik Holmstrom, Sandviken (SE); and Mirjam Lilja, Stockholm (SE)
Assigned to AB Sandvik Coromant, Sandviken (SE); and Sandvik Mining and Construction Tools AB, Sandviken (SE)
Appl. No. 17/785,482
Filed by AB SANDVIK COROMANT, Sandviken (SE); and SANDVIK MINING AND CONSTRUCTION TOOLS AB, Sandviken (SE)
PCT Filed Dec. 18, 2020, PCT No. PCT/EP2020/087073
§ 371(c)(1), (2) Date Jun. 15, 2022,
PCT Pub. No. WO2021/123204, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19218880 (EP), filed on Dec. 20, 2019.
Prior Publication US 2023/0036990 A1, Feb. 2, 2023
Int. Cl. C21D 1/06 (2006.01); C21D 7/04 (2006.01); C21D 9/22 (2006.01)
CPC C21D 1/06 (2013.01) [C21D 7/04 (2013.01); C21D 9/22 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of treating a sintered mining insert including cemented carbide, wherein the cemented carbide comprises hard constituents in a metallic binder phase, and wherein the metallic binder phase content in the cemented carbide is 4 to 30 wt %, wherein the metallic binder phase comprises at least 80 wt % of one or more metallic elements selected from Co, Ni and Fe; wherein the hard phase comprises at least 80 wt % WC, the method comprising:
subjecting the mining insert to a surface hardening process, wherein the surface hardening process is tumbling, wherein the tumbling process is conducted in dry conditions, wherein the tumbling process is a High Energy Tumbling process, wherein post tumbling a homogenous cemented carbide mining insert has been deformation hardened such that ΔHV3%>9.72-0.00543*HV3bulk, wherein the ΔHV3% is a percentage difference between a HV3 measurement at 0.3 mm from a surface of the insert compared a HV3 measurement in a bulk of the insert, and wherein the surface hardening process is executed at an elevated temperature of or above 100° C.