特殊鋼熔接の基礎的研究(第3報) : 電弧熔着せる強靱鋼板の靜的彎曲破壊エネダギーに及ぼすガス焔局部後熱の影響について

概要

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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) mains 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 was arc-deposited with a single bead, if the suitable local post-heating is carried on, and the heat affected and hardened zone by deposition1 is softened, that is the enrgy maximum hardness is lowered, the energy necessary for the statical bending break of a long rectangular plate deposited with a longitudinal sangle bead, is very larger than that of plateis without the post-heating. In other 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 smgle 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.
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