MUMBAI, India, July 7 -- Intellectual Property India has published a patent application (202617070602 A) filed by Hyundai Steel Company on June 05, 2026, for Ultra-High Strength Galvanized Steel Sheet Having Excellent Weldability And Manufacturing Method Therefor.
Inventors include La, Joung Hyun; Park, Min Suh; Han, Seong Kyung; Yook, Wan; and Kang, Jae Wook.
The application for the patent was published on July 03, 2026, under issue no. 27/2026.
Abstract: Provided are an ultra-high strength galvanized steel sheet having excellent weldability and a manufacturing method therefor. According to an embodiment of the present invention, the ultra-high strength galvanized steel sheet comprises: a steel sheet base material including, in wt %, carbon (C): 0.1-0.3%, silicon (Si): 1.0-2.0%, manganese (Mn): 2.5-3.5%, aluminum (Al): 0.05% or less (including 0%), chromium (Cr): 1.0% or less (including 0%), molybdenum (Mo): 0.2% or less (including 0%), titanium + niobium + vanadium (Ti + Nb + V): 0.05 wt % or less (including 0 wt %), and the balance of iron (Fe) and other inevitable impurities; an iron coating layer formed on the surface of the steel sheet base material; and a hot-dip galvanized layer formed on the surface of the iron coating layer, wherein an inner oxide is formed on the interface between the steel sheet base material and the iron coating layer to suppress the formation of an oxide on the interface between the iron coating layer and the hot-dip galvanized layer, the inner oxide being spherical in shape.
Disclaimer: Curated by HT Syndication.
