EP 0924313 B1 20040526 - Ferritic Chromium alloyed steel
Title (en)
Ferritic Chromium alloyed steel
Title (de)
Ferritischer Chromstahl
Title (fr)
Acier au chrome ferritique
Publication
Application
Priority
- US 99438297 A 19971219
- US 15382298 A 19980915
Abstract (en)
[origin: EP0924313A1] A ferritic non-ridging stainless steel and process therefor. A chromium alloyed steel melt containing sufficient titanium and nitrogen but a controlled amount of aluminum is cast into an ingot or continuously cast into a strip or a slab having an as-cast fine equiaxed grain structure substantially free of columnar grains. The as-cast steel contains 0.08% C, at least about 8% Cr, up to 1.50% Mn, < 0.020% Al, ≤ 0.05% N, ≤ 1.5% Si, < 2.0% Ni, Ti ≥ 0.10%, the ratio of (Ti x N)/Al ≥ 0.14, all percentages by weight, the balance Fe and residual elements. Preferably, the titanium is controlled so that (Ti/48)/Ä(C/12) + (N/14)Ü > 1.5. A hot processed sheet may be formed from a continuously cast slab without grinding the surfaces of the slab. The hot processed sheet may be descaled, cold reduced to a final thickness and recrystallization annealed. Annealing the hot processed sheet prior to cold reduction is not required to obtain an annealed sheet essentially free of ridging and having high formability. <IMAGE>
IPC 1-7
IPC 8 full level
C21D 9/46 (2006.01); C21D 8/02 (2006.01); C21D 9/00 (2006.01); C22C 38/00 (2006.01); C22C 38/18 (2006.01); C22C 38/40 (2006.01); C22C 38/50 (2006.01)
CPC (source: EP)
C21D 8/0215 (2013.01); C22C 38/18 (2013.01); C22C 38/50 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0924313 A1 19990623; EP 0924313 B1 20040526; AR 017437 A1 20010905; AT E267886 T1 20040615; BR 9805348 A 19991130; CA 2254564 A1 19990619; CA 2254564 C 20120710; CN 1088122 C 20020724; CN 1224070 A 19990728; DE 69824131 D1 20040701; DE 69824131 T2 20050602; DK 0924313 T3 20040809; ES 2222549 T3 20050201; JP 4388613 B2 20091224; JP H11246944 A 19990914; RU 2227172 C2 20040420; TW 496903 B 20020801
DOCDB simple family (application)
EP 98124277 A 19981218; AR P980106516 A 19981218; AT 98124277 T 19981218; BR 9805348 A 19981216; CA 2254564 A 19981127; CN 98125446 A 19981218; DE 69824131 T 19981218; DK 98124277 T 19981218; ES 98124277 T 19981218; JP 36090698 A 19981218; RU 98123163 A 19981221; TW 87117755 A 19981027