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Title:
MANUFACTURING METHOD OF HIGH STRENGTH GALVANIZED STEEL PLATE
Document Type and Number:
Japanese Patent JP2018016851
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a high-strength galvanized steel plate having an excellent rust prevention property in a high-temperature high-humid area.SOLUTION: A manufacturing method produces a galvanized steel plate in which a steel plate has a galvanized layer of a coating weight of 20-100 g/mper surface on a steel plate surface, the steel plate having a composition in mass% of C:0.01-0.18%, Si:0.02-2.0%, Mn:1.0-5.0%, Al:0.001-1.0%, P:0.005-0.060%, S:less than 0.01%, and a rest of Fe and an inevitable impurity. The galvanized steel plate is annealed in the temperature range of 750°C or more and under a condition of log(PHO/PH)≤-2.0 and [HO]×Time≤50,000.SELECTED DRAWING: None

Inventors:
TANAKA MINORU
SUZUKI YOSHITSUGU
OKUMURA TOMOSUKE
Application Number:
JP2016148244A
Publication Date:
February 01, 2018
Filing Date:
July 28, 2016
Export Citation:
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Assignee:
JFE STEEL CORP
International Classes:
C23C2/02; C21D9/46; C22C18/00; C22C18/04; C22C38/00; C22C38/06; C22C38/58; C23C2/06; C23C2/28; C23C2/40
Attorney, Agent or Firm:
Shigeru Inoue
Kazuhiro Mori