METHOD FOR CONTROLLING THE THICKNESS OF AN INTERMETALLIC LAYER ON A CONTINUOUS STEEL PRODUCT IN A CONTINUOUS HOT-DIP GALVANIZING PROCESS

摘要

Abstract of the disclosureThe present invention relates to a method forcontrolling the thickness of an intermetallic layer on acontinuous steel product in a continuous hot-dip galvan-izing line. The steel product is rapidly cooled byquenching in a zinc bath and the structure of the coat-ing to be formed on the steel product is controlled bydirecting a flow of molten zinc, cooled to a temperature1° to 15°C below the operating temperature of the zincbath, towards the steel strip. At least a part of saidflow is preferably directed towards the steel productclose to its immersion point into the zinc bath, obli-quely against the movement direction of the steel pro-duct.(Figure 3)