METHOD FOR HOT FINISH ROLLING OF CHECKERED STEEL PLATE

摘要

PURPOSE:To prevent chipping of checkered holes and to extend the life of a finishing roll for forming checkers to a greater extent by forming the shoulder parts of all the peripheral walls of the checkered holes of the roll to a gentle shape having a radius R of curvature. CONSTITUTION:The many checkered holes 5 are formed on the surface 4 of the finishing roller for forming checkered projections 2 on the surface of a steel plate 1. The shoulder parts 7 of the peripheral walls 6 of the holes 5 are formed to the gentle nonangular shape having the radius R of curvature. The stress concn. to the shoulder parts is, therefore, relieved to prevent the chipping in the shoulder parts 7 of the holes 5. The roll life is thereby extended greatly to >=2-fold the life of the conventional roll and the production of the checkered plates of stainless steels and alloy steels having high hot strength is permitted.