ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,861, issued on Aug. 19, was assigned to AB Sandvik Coromant (Sandviken, Sweden).
"Coated cutting tool" was invented by Susanne Norgren (Vastberga, Sweden) and Bartek Kaplan (Vastberga, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a coated cutting tool including a Cr-containing cemented carbide substrate having WC, a binder phase and a gamma phase. The cemented carbide includes a gradient surface zone with a thickness of between 2 to 100 micro metre, which is binder phase enriched and depleted of gamma phase. The cemented carbide includes M7C3 carbides in an amount of between 0.5 to 7 area % measured in the b...