ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,075, issued on June 10, was assigned to SUMITOMO ELECTRIC HARDMETAL CORP. (Itami, Japan).
"Cutting tool" was invented by Yasuki Kido (Itami, Japan), Susumu Okuno (Itami, Japan) and Masahito Hikiji (Itami, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting tool includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an Alpha-Al2O3 layer, the Alpha-Al2O3 layer includes a plurality of Alpha-Al2O3 crystal grains, and has a TC(006) of more than 5 in texture coefficient TC(hkl), and a plastic deformation amount hp of the Alpha-Al2O3 layer at 800deg C. is 0 nm or more and 100 nm or less."
The pate...