Title:
CAST SLAB AND STEEL SHEET OF FERRITIC STAINLESS STEEL AND PRODUCTION METHOD FOR THE SAME
Document Type and Number:
Japanese Patent JP3746045
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a ferritic stainless steel sheet having excellent deep drawability, bulging properties, and ridging properties.
SOLUTION: Development of coarse columnar crystals in a cast slab is restrained by adding Mg after realizing the chemical composition with the contents of C, N, Si, Mn, P, and Ti reduced as far as possible to obtain high workability and by dispersing MG-containing oxides to promote nucleation of solidification, and thus, the reduction of roping and ridging in the product is achieved. Then, the average composition of Mg-containing oxides dispersed in the steel slab is peculiarly needed to satisfy the composition range shown in the formulas (2) and (3). 17.4(Al2O3) + 3.9(MgO) + 0.3(MgAl2O4) + 18.7(CaO) ≤ 500 ...(2) (Al2O3) + (MgO) + (MgAl2O4) + (CaO) ≥ 95...(3).
Inventors:
Akihiko Takahashi
Junichi Hamada
Kimura Ken
Takashi Moroboshi
Yoshihito Yamada
Toyohiko Kakihara
Satoshi Hashimoto
Junichi Hamada
Kimura Ken
Takashi Moroboshi
Yoshihito Yamada
Toyohiko Kakihara
Satoshi Hashimoto
Application Number:
JP2003075466A
Publication Date:
February 15, 2006
Filing Date:
March 19, 2003
Export Citation:
Assignee:
Nippon Steel & Sumikin Stainless Steel Co., Ltd.
International Classes:
B21B3/02; C22C38/00; C21C7/00; C21C7/04; C21D9/46; C22C38/28; C22C38/50; (IPC1-7): C22C38/00; B21B3/02; C21C7/00; C21C7/04; C21D9/46; C22C38/28; C22C38/50
Domestic Patent References:
| JP10324956A | ||||
| JP2001269747A | ||||
| JP2000212704A | ||||
| JP2000328173A |
Attorney, Agent or Firm:
Shunta Naito
Hisataka Tanaka
Hisataka Tanaka