BOPI 02 BR/2024 REPERTOIRE NUMERIQUE 42 C22C 29/08 (2018.01) (21) 1202300479 - PCT/EP2022/066236 (22) 14/06/2022 (30) EP n° 21179812.9 du 16/06/2021 (54) Cemented carbide insert with eta-phase core. (72) LILJA, Mirjam (SE) et ARVANITIDIS, loannis (SE) (73) SANDVIK MINING AND CONSTRUCTION TOOLS AB, 81181 SANDVIKEN (SE) (74) S.C.P. AKKUM AKKUM & Associates, No. 1777, Rue 6.261, Auditorium Jean Paul II, Quartier Mbankolo B.P. 4966, YAOUNDE (CM). (57) A method of treating a cemented carbide insert for rock drilling and mineral cutting comprising a core of cemented carbide and a surface zone of cemented carbide wherein the core further contains eta-phase and the surface zone is free of eta-phase, and wherein the mining insert is subjected to a surface hardening process wherein the surface hardening process is executed at an elevated temperature of or above 50°C. Figure 2
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