SPHEROIDIZATION ANNEALING METHOD FOR MANUFACURING HIGH CARBON STEEL SHEET HAVING EXCEELENT FARMABILITY AND HIGH CARBON STEEL SHEET PRODUCED BY THE SAME

摘要

The present invention relates to a spheroidizing heat treatment method for producing a high carbon steel sheet having excellent moldability and a high carbon steel sheet produced thereby. One embodiment of the present invention is a method of manufacturing a high carbon steel sheet, comprising: a first heat treatment step of heating a high carbon steel sheet at 750 to 790 占 폚 and holding it for 60 to 150 minutes; And a second heat treatment step of cooling the first heat treated high carbon steel sheet at a temperature of 640 to 710 DEG C for 400 to 1,500 minutes, and a spheroidizing heat treatment method for manufacturing a high carbon steel sheet having excellent moldability, Carbon steel sheet. According to the present invention, the carbide can be effectively spheroidized and finely formed, so that it is possible to impart excellent formability to the steel sheet. Further, it is possible to easily dissolve the carbide during the austenitizing heat treatment after the component processing of the steel sheet, It is possible to provide a spheroidizing heat treatment method which can be remarkably shortened.