초록 ▼

According to the invention, the rear end of a preceding metal piece and a front end of a succeeding metal piece are heated, pressed and joined prior to the finishing hot rolling. An alternating magnetic field running through the metal pieces in the thickness direction thereof is generated in an end

According to the invention, the rear end of a preceding metal piece and a front end of a succeeding metal piece are heated, pressed and joined prior to the finishing hot rolling. An alternating magnetic field running through the metal pieces in the thickness direction thereof is generated in an end region on opposed faces of the respective metal pieces to perform heating. Another alternating magnetic field whose direction is reverse with respect to that of the former alternating magnetic field is partially generated in the end region on the opposed faces of the metal pieces and in either a region where the metal pieces exist or a region outside width ends of the metal pieces. This assures a uniform heating of the end region on the opposed faces of the metal pieces over their full width to reliably join the both metal pieces to each other.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for joining metal pieces wherein a rear end of a preceding metal piece and a front end of a succeeding metal piece are heated and the metal pieces are pressed against each other for joining before hot finishing rolling, characterized in that:the rear end of the

[ What is claimed is:] [1.]1. A method for joining metal pieces wherein a rear end of a preceding metal piece and a front end of a succeeding metal piece are heated and the metal pieces are pressed against each other for joining before hot finishing rolling, characterized in that:the rear end of the preceding metal piece and the front end of the succeeding metal piece are opposed to each other with a space therebetween, and an alternating magnetic field running through the metal pieces in the thickness direction is generated at end regions of the opposed faces of the respective metal pieces to perform heating, wherein conductive members are provided to both width ends of at least one of the rear end of the preceding metal piece and the front end of the succeeding metal piece, thereby improving the heating efficiency of the metal piece in the width direction thereof by the conductive members.