Barrack barrack manufacturing method and manufacturing equipment

摘要

PROBLEM TO BE SOLVED: To execute billet rolling thereafter without problem, by restraining the occurrence of a tearing-off flaw caused by melted-shaven slag of remaining on a surface of a rolling object material (for example, an intermediate bloom) of executing a hot scarf.SOLUTION: A billet manufacturing method for manufacturing a billet being an intermediate raw material of a steel product, comprises a hot scarf process of removing a surface defect of a rolling object material, a melted-shaven slag removal process of removing a melted-shaven slag stuck to a surface by jetting high pressure water to the rolling object material and a billet rolling process of rolling the rolling object material, in oder, and after finishing the melted-shaven slag removal process, the billet rolling process is started after passing 30 sec or more.SELECTED DRAWING: Figure 1