Abstract: A cold rolled steel strip having an elevated temperature is continuously cooled to a desired temperature at a desired cooling rate by a process comprising moving the cold rolled steel strip along at least one vertical cooling path, and; bringing a plurality of streams each consisting of a mixture of a cooling gas and a cooling liquid into contact with each surface of the steel strip, each mixture stream being prepared by jetting the cooling gas and liquid independently from others in directions intersecting each other before the vertical path of the steel strip.

Abstract: A dual-purpose production plant for cold rolled steel sheets and hot-dip galvanized steel sheets having, successively disposed in series, a heating zone, a soaking zone, a primary cooling zone, an overaging zone equipped with a controlled cooling facility, a molten galvanizing zone, an intermediate cooling means, a secondary cooling zone, a temper rolling means, and a chemical treatment means, and a bypass for directly connecting the overaging zone and the secondary cooling zone with each other.

Abstract: A continuous cold rolling and annealing apparatus for a steel strip so that interruption of a cold rolling mill part does not directly cause a continuous annealing furnace part to be interrupted, in which apparatus at least one cold rolling mill is located upstream of the entrance of a continuous annealing furnace and an intermediate reel for supplying a spare steel strip coil to said continuous annealing furnace, is arranged between the cold rolling mill and the continuous annealing furnace.