Abstract
In this research, the authors confirmed the effect of the local post-heating on the energies necessary for statical bending break of alloy steel plates deposited with a single bead, and, clarified the main cause of the lowering of the necessary energy for plates which were deposited and not postheated locally.
Namely, after Mn-Cr-Mo alloy steel plate wds arc-deposited with a single bead, if the suitable local post-heating is carried on. and the heat affected and hardened zone by deposition is softened, that is, the enrgy maximum hardnests is lowered, the energy necessary for the statical bending break of a long rectangular plate deposited with a longitudinal single Lead, is very larger than that of plates without the' post-heating.
In othen words, the following matter can be understood. The main cause of the lowering of the energy necessary for statical. bending break of alloy steel plates deposited with a single bead, is the existence of the hardenedl zone adjacent to the weld, and the post-heating being able to soften such a hardened zone gives a good effect on the increase of. the energy necessary for the break.
