ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,957, issued on April 14, was assigned to NIPPON STEEL Corp. (Tokyo).
"Slab and continuous casting method thereof" was invented by Shin Takaya (Tokyo), Kenji Taguchi (Tokyo) and Yuichiro Kato (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "This slab is a slab of high-Al steel containing C: 0.02 mass % to 0.50 mass % and Al: 0.20 mass % to 2.00 mass %, in which, in a case where [Zr], [Ti], [Al], and [N] each represent a content (mass %) in the slab, a Zr content and a Ti content satisfy a relationship of [Zr]+0.2x[Ti]less than=4/3x[Al]x[N], and the Zr content satisfies a relationship of 0.0010 mass %less than equal to[Zr]."
The patent was file...