EP 0032583 B1 19840801 - PROCESS FOR CONTINUOUSLY ANNEALING OF A COLD ROLLED STEEL STRIP
Title (en)
PROCESS FOR CONTINUOUSLY ANNEALING OF A COLD ROLLED STEEL STRIP
Publication
Application
Priority
- JP 16682679 A 19791224
- JP 16682779 A 19791224
Abstract (en)
[origin: EP0032583A1] The present invention involves a concept of combining the following: using instead of a direct fired furnace a radiation heating furnace, thereby preventing the formation of an appreciable oxide layer during the stages for heating to and holding within the requisite annealing temperature range; cooling the annealed steel strip by a cooling medium consisting of a mixture of gas and liquid, and; removing the oxide film formed during the cooling stage, by means of pickling at the final step. In the present invention it is possible to eliminate the surface-quality problems caused by conventional processes and simultaneously to omit the reheating for overaging of the steel strip.
IPC 1-7
IPC 8 full level
C21D 9/52 (2006.01)
CPC (source: EP)
C21D 9/52 (2013.01)
Citation (examination)
- DE 2165049 B2 19731115
- Patents Abstracts of Japan, Vol. 1, No. 64, 22 June 1977, page 995C77
- Patents Abstracts of Japan Vol. 4, No. 22, 23 February 1980, page 128C74
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0032583 A1 19810729; EP 0032583 B1 19840801; BR 8008511 A 19810721; CA 1152870 A 19830830; DE 3068827 D1 19840906
DOCDB simple family (application)
EP 80108148 A 19801222; BR 8008511 A 19801223; CA 367063 A 19801218; DE 3068827 T 19801222