| 摘要 |
PURPOSE:To minimize the amt. of costly cladding materials to be used and to obtain a corrosion resistant clad steel pipe having high quality inexpensively, by forming only the cladding metals on both marginal sides that form the seam of a clad steel plate (or steel strip) to a thick wall. CONSTITUTION:A clad steel plate is produced by cladding a steel base material 2 and a cladding metal 3 consisting of a corrosion resistant raw material. The thickness over the entire part thereof is made roughly uniform, and the cladding material 3 in the central part is formed at the min. wall thickness t1 required for forming a corrosion resistant covering. The wall thickness t2 on both marginal sides 3a, 3b to be welded of the cladding metal is increased so as to provide the sound covering of the cladding metal after welding. The wall thickness on both marginal sides of the material 2 is correspondingly decreased. The widths Wa, Wb in the thick wall parts on the sides 3a, 3b are made larger than at least the widths allowing for the margins for edge preparation and the width of penetration in welding stage. |
