| 摘要 |
PURPOSE:To manufacture clad steel at high rolling yield, by build-up welding a cladding material on the surface of base metal different in thickness stepwise to form a slab uniform in thickness and dividing parts of different clad ratio after hot rolling. CONSTITUTION:A stepped base metal 6 having different thicknesses T1 and T2 is manufactured and an angle theta of the surface of the base metal 6 is made greater than 100 deg.. Cladding materials 4 of different kinds are build-up welded on the surface of the base metal 6 to build-up thicknesses of t1, t2 to effect T1+ t1=T2+t2. The build-up welded slab is heated uniformly to about 1,200 deg.C in a heating furnace and hot-rolled to obtain a clad steel plate having different clad ratios in the same steel plate. By dividing this clad steel plate into steel plates of the same clad ratio, clad plates having desired clad ratio and size can be obtained. |
