METHOD FOR REDUCING RESIDUAL STRESS OF H-BEAM

摘要

PURPOSE:To relieve the residual stress of an H-beam by a simplified equipment, by subjecting a web of an H-beam to induction heating under specific conditions in the course of hot rolling. CONSTITUTION:At the time of subjecting the web of an H-beam to induction heating in the course of hot rolling so as to relieve the residual stress, the heating width is regulated to one-half the height of the web or less and the web is heated to a temp. of its transformation point or above. In this way, the amount of plant and equipment investment in induction heating and running cost can be reduced and the residual stress of the H-beam can also be reduced.