US Patent Issued to POSCO on Jan. 13 for "Method of manufacutring a high-strength cold rolled steel sheet having high hole expansion ratio, and highstrength hot-dip galvanized steel sheet" (South Korean Inventors)

ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,888, issued on Jan. 13, was assigned to POSCO Co. LTD (Pohang-si, South Korea).

"Method of manufacutring a high-strength cold rolled steel sheet having high hole expansion ratio, and highstrength hot-dip galvanized steel sheet" was invented by Young-Roc Im (Gwangyang-si, South Korea), Jong-Chan Park (Gwangyang-si, South Korea), Jai-Hyun Kwak (Gwangyang-si, South Korea) and Min-Seo Koo (Gwangyang-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a method of manufacturing a high-strength cold rolled steel sheet. The method includes: preparing a slab; heating the slab to 1,150deg C. to 1,250deg C.; finish hot rolling the heated...