Title:
成形性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法
Document Type and Number:
Japanese Patent JP4956998
Kind Code:
B2
Abstract:
There is provided a high-strength hot-dip galvanized steel sheet having excellent formability, the steel sheet eliminating special pre-structure control and capable of being produced by using a hot-dip galvanized steel-sheet production line that is not capable of sufficiently ensuring an austempering time after annealing. A high-strength hot-dip galvanized steel sheet includes, on the basis of mass percent, 0.05-0.3% C, 1.4% or less (including 0%) Si, 0.08%-3% Mn, 0.003-0.1% P, 0.07% or less S, 0.1-2.5% Al, 0.1-0.5% Cr, and 0.007% or less N, Si + Al ¥ 0.5%, and the balance being Fe and incidental impurities, wherein the steel sheet has a retained austenite content of 3% or more by volume fraction, and wherein the average aspect ratio of retained austenite grains is 2.5 or less.
Inventors:
Hiroshi Matsuda
Tatsuya Nakagaichi
Takayuki Futatsuka
Shusaku Takagi
Yasunobu Nagataki
Tatsuya Nakagaichi
Takayuki Futatsuka
Shusaku Takagi
Yasunobu Nagataki
Application Number:
JP2006001477A
Publication Date:
June 20, 2012
Filing Date:
January 06, 2006
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C22C38/00; C21D9/46; C22C38/60; C23C2/06
Domestic Patent References:
| JP2004292891A | ||||
| JP2001234281A | ||||
| JP2004190050A | ||||
| JP2005029867A |
Attorney, Agent or Firm:
Hiroshi Takayama