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近年来,愈来愈广泛地采用切分轧制型材。采用这种轧制法,以后在冷态沿轧件长度方向,将其分开,在精轧道次辗平纵向沟并充满金属,以形成削弱断面。
In recent years, split rolling profiles have been increasingly used. Using this rolling method, after the cold in the rolling along the length of the direction, to separate them in the finishing pass rolling vertical groove and filled with metal to form weakened cross-section.