Title:
HOT DIP GALVANIZED STEEL SHEET EXCELLENT IN BAKING HARDENABILITY, POWDERING RESISTANCE AND PRESS FORMABILITY AND ITS PRODUCTION METHOD
Document Type and Number:
Japanese Patent JP2002030383
Kind Code:
A
Abstract:
To provide a hot dip galvanized steel sheet or a hot dip galvannealed steel sheet having high baking hardenability and also excellent in plating suitability and press formability.
C, Si, Mn, S, P, Al, Nb, Ti, N and B are incorporated into a steel, and the relation among Ti, Nb or B, C and N are set in a prescribed range. This steel is subjected to hot rolling and annealing under prescribed conditions, so that the hot dip galvanized steel sheet and hot dip galvannealed steel sheet having good baking hardenability (≥300 MPa) and (r) value (≥1.3) can be obtained.
Inventors:
SUEHIRO MASAYOSHI
TAKADA YOSHIHISA
TAKADA YOSHIHISA
Application Number:
JP2000209974A
Publication Date:
January 31, 2002
Filing Date:
July 11, 2000
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
C21D9/46; C22C38/00; C22C38/54; (IPC1-7): C22C38/00; C21D9/46; C22C38/54
Attorney, Agent or Firm:
Hiroaki Tamura (1 outside)