ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,991, issued on June 3, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).
"Base material and cutting tool" was invented by Takato Yamanishi (Osaka, Japan) and Keiichi Tsuda (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A base material according to an aspect of the present disclosure is made of a cemented carbide. The cemented carbide includes a first hard phase and a binder phase. The first hard phase consists of WC particles. The binder phase includes at least one element selected from Co and Ni. The base material includes a body portion, and a surface portion provided on a surface of the body portion. The surface porti...