Title:
MANUFACTURE OF FERRITE STAINLESS STEEL EXCELLENT IN SURFACE QUALITY AND WORKABILITY
Document Type and Number:
Japanese Patent JP3728828
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To economically, efficiently and stably manufacture ferrite stainless steel excellent in surface quality and workability by continuously casting specific Cr content steel in high speed, charging the continuous cast slab into a heating furnace without cooling and then executing hot rolling at a specified temperature.
SOLUTION: Ferrite stainless steel containing ≥11.0wt.% Cr, further as necessary one kind or more of Ti, Nb, V, Zr, Ta, and W, and further more 4×(C+N) to 0.5wt.% is manufactured by the continuous casting-hot rolling. In this case, the continuous casting velocity is ≥1.2m/sec. Further, the obtained continuous cast slab is charged into a heating furnace before the surface temperature goes down to ≤400°C, and then is hot-rolled after heated at ≤1200°C, preferably ≥ around 1050°C.
Inventors:
Yasushi Kato
Masayuki Kasai
Uki Engineering
Susumu Sato
Shintaro Kumazawa
Masayuki Kasai
Uki Engineering
Susumu Sato
Shintaro Kumazawa
Application Number:
JP25967696A
Publication Date:
December 21, 2005
Filing Date:
September 30, 1996
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C21D8/04; B22D11/00; C21D8/02; C22C38/00; C22C38/18; C22C38/28; (IPC1-7): B22D11/00; C21D8/02; C22C38/00; C22C38/18; C22C38/28
Domestic Patent References:
| JP3110041A | ||||
| JP57152420A | ||||
| JP54128464A |
Other References:
「ステンレス鋼CC鋳片表面性改善」資料,日本鉄鋼協会共同研究会第95回特殊鋼部会,1993年 2月21日
Attorney, Agent or Firm:
Junzo Ogawa
Morio Nakamura
Morio Nakamura