The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 02, 2021
Filed:
Jun. 16, 2016
Posco, Pohang-si, KR;
Sang-Ho Han, Gwangyang-si, KR;
Je-Woong Lee, Gwangyang-si, KR;
POSCO, Pohang-si, KR;
Abstract
Provided are a hot-dip galvanized steel sheet and a hot-dip galvannealed steel sheet with excellent aging-resistance properties and bake hardenability, and a method for manufacturing the same. The hot-dip galvanized steel sheet has a molten zinc plated layer on the surface of a base steel sheet, wherein the base steel sheet comprises: 0.002-0.012 wt % of carbon (C); 1.6-2.7 wt % of manganese (Mn); 0.03 wt % or less (excluding 0 wt %) of phosphorus (P); 0.01 wt % or less (excluding 0 wt %) of sulfur (S); 0.01 wt % or less (excluding 0 wt %) of nitrogen (N); 0.02-0.06 wt % of aluminum (sol.Al); 1.0 wt % or less (excluding 0 wt %) of chromium (Cr), with the remainder being iron and inevitable impurities; the base steel sheet satisfies the relation of 1.3≤Mn(wt %)/(1.15×Cr(wt %))≤20.5; Mneq defined by relational expression 1 satisfies 1.9≤Mneq≤3.9.