RAPID COOLING QUENCHING DEVICE AND RAPID COOLING QUENCHING METHOD
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机译：快速冷却淬火装置及快速冷却淬火方法
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摘要
An object is to provide a rapid-cooling quenching apparatus and a rapid-cooling quenching method for a steel sheet with which it is possible to suppress a decrease in the cooling rate of a metal sheet while shape defects occurring in the metal sheet are reduced when rapid-cooling quenching is performed in continuous annealing equipment in which annealing is performed while the metal sheet continuously passes through the equipment. A rapid-cooling quenching apparatus in which a high-temperature metal sheet is dipped and cooled in a liquid, the apparatus including a water tank containing the liquid in which the metal sheet is dipped, a jetting device having plural nozzles through which the liquid is jetted onto front and back surfaces of the metal sheet and at least some of which are placed in the liquid in the water tank, and a pair or plural pairs of restraining rolls which are placed between an entrance-side end of the jetting device and an exit-side end of the jetting device and restrain the metal sheet, in which nozzles nearest to the restraining rolls are inclined toward the restraining rolls from a horizontal plane in the jetting device.
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