METHOD FOR MANUFACTURING SUPER STRONG STEEL BODY FOR MANUFACTURE OF PRODUCTS WITH COMPLICATED SHAPE

摘要

The present invention relates to a method for manufacturing a super strong steel body, more specifically, to the method for manufacturing a super strong steel body suitable for the processing of products with complicated shapes and deep casting depths. The present invention comprises: a sheet preparation step for blanking a steel sheet with curing ability in a certain shape and cutting the steel sheet; a cold forming step for cold pressing the steel sheet and forming the steel sheet with 50~80% the thickness of the height of the end product; a trimming step for precisely cutting the cold formed product along the outline of the finished goods; and a hot forming and cooling step for simultaneously hot press forming the trimmed goods with 20~50% the thickness of the height of the end product and cooling the trimmed goods from the heated state after heating the trimmed goods over 700? for austenitization.