Title:
耐2次加工脆性、疲労特性及びメッキ特性に優れている深絞り用薄鋼板及びその製造方法
Document Type and Number:
Japanese Patent JP4848423
Kind Code:
B2
Abstract:
A steel sheet for deep drawing used for automobiles, and a method for manufacturing the same are disclosed. The steel sheet comprises, by weight %, C: 0.010% or less, Si: 0.02% or less, Mn: 0.06~1.5%, P: 0.15% or less, S: 0.020% or less, Sol. Al: 0.10~0.40%, N: 0.010% or less, Ti: 0.003~0.010%, Nb: 0.003~0.040%, B: 0.0002~0.0020%, and the balance of Fe and other unavoidable impurities, wherein the composition of Ti, Al, B, and N satisfies the relationship: 1.0<(Ti[%]+Al[%]/16+6B[%])/3.43N[%]<4.1, and wherein the composition of Nb, Al, and C satisfies the relationship; 0.7<(Nb[%]+Al[%]/20)/7.75C[%]<3.5. The steel sheet exhibits excellent secondary work embrittlement, fatigue properties of welded joints, and an appealing plated surface as well as excellent formability.
Inventors:
Kang Hee Jee
Chin Gwang-Kaeun
Hansan-ho
Cho Chan-Sik
Chin Gwang-Kaeun
Hansan-ho
Cho Chan-Sik
Application Number:
JP2008520188A
Publication Date:
December 28, 2011
Filing Date:
July 07, 2006
Export Citation:
Assignee:
POSCO
International Classes:
C22C38/00; C21D9/46; C22C38/14
Domestic Patent References:
| JP2005520054A | 2005-07-07 | |||
| JPH1060544A | 1998-03-03 | |||
| JPH08232045A | 1996-09-10 |
Attorney, Agent or Firm:
Mikio Yoshimiya