| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method where, even under welding conditions of high efficiency, a B-containing stainless steel slab is hot-worked without generating welding cracks upon the operation and edge cracks after the rolling, and to provide a steel after the working. <P>SOLUTION: Regarding the B-containing stainless steel slab, a protect material composed of a stainless steel comprising, by mass, ≤0.3% B is joined and integrated into at least confronted two faces other than the working face of a stainless steel slab comprising 0.3 to 2.5% B by a stainless steel weld metal, the chemical composition of the stainless steel weld metal satisfies the relation expressed by fundamental inequalities of (1) to (3), and also, the shape coefficient Q (Wcm/Wn) in the cross-section of a weld bead shown by a ratio between the bead width Wcm at the central part of the cross-section in the weld bead and the bead width Wn at the inlet part is 0.8 to 1.4; wherein, 15≤Creq≤30 (1), 4≤Creq-Nieq≤17 (2), and Px≥0 (3). <P>COPYRIGHT: (C)2007,JPO&INPIT |
