US Patent Issued to Sandvik Mining and Construction Tools on Feb. 24 for "Cemented carbide insert with eta-phase core" (Swedish Inventors)

ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,806, issued on Feb. 24, was assigned to Sandvik Mining and Construction Tools AB (Sandviken, Sweden).

"Cemented carbide insert with eta-phase core" was invented by Ioannis Arvanitidis (Vastberga, Sweden) and Mirjam Lilja (Vastberga, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of treating a cemented carbide insert for rock drilling and mineral cutting is provided. The insert includes 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. The mining insert is subjected to a surface hardening process, wherein the surface hardening proce...