Method of treating a mining insert
AssigneesAB Sandvik Coromant, Sandvik Mining and Construction Tools AB
InventorsIoannis Arvanitidis, Andreas Blomqvist, Jose Luis Garcia, Erik Holmstrom, Mirjam Lilja
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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.
Claims12
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.
Dependencies are inferred from the claim text.