Title:
PRODUCTION OF HOT DIP GALVANIZED STEEL SHEET HAVING HIGH YIELD RATIO
Document Type and Number:
Japanese Patent JP3841567
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a hot dip galvanized steel sheet having a high yield ratio required to use for building materials, structures, industrial equipment or the like and moreover, free from the generation of blackening in high temp.-high moisture environments even in the case that the surface of plating is applied to chromate treatment.
SOLUTION: This plated steel sheet is produced by applying a hot rolled steel sheet of steel composed of 0.1 to 0.3% C, ≤0.4% Si, 0.2 to 2.5% Mn, ≤0.10% P, ≤0.02% S, 0.005 to 0.10% sol.Al, ≤0.01% N and the balance substantially consisting of Fe to skinpass rolling of 3.0-15.0% elongation percentage, thereafter, heating it at 500 to 800°C in a continuous hot dip plating line, applying it to plating thereon and after the plating, applying it to skinpass rolling of ≤2.0% elongation percentage. By executing the skinpass rolling of high elongation percentage before plating (the skinpass after plating is in low elongation percentage), high yield strength (≥0.7 yield ratio) and blackening resistance can simultaneously be secured.
Inventors:
Masayuki Kobayashi
Application Number:
JP24332698A
Publication Date:
November 01, 2006
Filing Date:
August 28, 1998
Export Citation:
Assignee:
Nisshin Steel Co., Ltd.
International Classes:
C21D9/46; C23C2/02; C22C38/00; C22C38/06; C23C2/06; (IPC1-7): C21D9/46; C23C2/02; C23C2/06; //C22C38/00; C22C38/06
Domestic Patent References:
| JP46026217B1 | ||||
| JP10226821A | ||||
| JP9249954A |
Attorney, Agent or Firm:
Shinhachiro Miyazaki