COOLING METHOD FOR HEAT PROCESSING OF STEEL PLATE

摘要

PURPOSE: A cooling method for hot working of a steel sheet is provided to obtain a three-dimensional shape of a steel sheet by properly cooling the heated steel sheet. CONSTITUTION: A cooling method for hot working of a steel sheet comprises the steps of: determining a cooling position of a steel sheet according to the type of a heat source(S110), determining a cooling start point of the steel sheet(S130), determining a cooling speed of the steel sheet(S150), and determining a cooling end point of the steel sheet(S170). In the cooling position determining step, a cooling position is located on the opposite side of a heating source facing side if a heating source is a gas heater and located on a heating source facing side or the opposite side if a heating source is a high-frequency heating source. [Reference numerals] (S110) Step of determining a cooling position of a steel sheet according to the type of a heat source; (S130) Step of determining a cooling start point of the steel sheet; (S150) Step of determining a cooling speed of the steel sheet; (S170) Step of determining a cooling end point of the steel sheet