炭酸ガスレーザによるステンレス鋼薄板の突合わせ溶接部の熱サイクル，組織および強度について

Abstract

The purpose of the present paper is to examine the thermal cycles and discuss the influences of thermal cycles upon structure and tensile strength at the butt welding parts of thin stainless plate (SUS 304) by CO2 gas laser. However, there are few researches hitherto which deal with those problems. So, in this paper the authors have measured temperature, structure at the butt welding parts by using of PR thermocouple and electron probe microanalyser. Moreover, the measuredresults of temperature were compared with the experimental results in the case of bead on plate method and the theoretically calculated results. The conclusions are as follows. (1) By this research, the thermal cycles of the welding parts at each welding velocity were shown and the influences of those cycles upon structure and tensile strength of the welding part could be clarified. (2) The experimental values of the temperature at the butt welding parts are higher than those of the case of bead on plate method and theoretical calculation. (3) The practical formula describing the temperature at the butt welding parts is able to derived.