Method of manufacturing high carbon tool steel strip for thick plate with high hardenability and impact resistance

摘要

After the present invention is used as the material of the blade used for cutting, high speed cutting of large structures for water and relates to a method of producing a carbon tool steel strip, its object is to manufacture a high carbon tool steel strip having an excellent impact resistance and hardenability, such as through adjustment of Ni, Ca, S components that are added in order to obtain high-strength properties of the deceased and the carbon tool steel material is provided a method. ; to the present invention for achieving the object, by weight%, C: 0.7~0.9%, Si: 0.2~0.5%, Mn: 0.4~0.7%, S: less than 0.005%, P: 0.02 % or less, Ni: 0.5~2.0%, Cr: 0.1~0.5%, Al: 0.02~0.05%, N: 0.005~0.015%, Ca: 0.001~0.01%, less than the steel material consisting of unavoidable impurities and the remainder Fe 1250 rolling the re-heated to less than 250 minutes in the hot, and then wound up at 580~670 , pickling the hot-rolled sheet, and a spheroidizing annealing in the range of 650 ~ A1 transformation point after the quenching-hardenability and tempering comprises that After impact resistance and excellent for water and that relates to a process for the manufacture of carbon tool steel strip as a technology base.