炭酸ガス関口線材アーク熔接法について(第4報)

Abstract

According to our opinion, it is obious that the filler wire must contain more amount of deoxidizers than that for killed or semi-killed steel, in case of the C. S. Arc Welding of rimmed steel. And these amounts are to be variable according to the conditions of welding, e. g. thickness of plate, shape of groove and treatment of surface of plates to be welded.Authors reported already that one or two-pass welded joints of rimmed steel, 10mm in thickness, with the C. S. Arc Welding Process are very satisfactory. In this report, they investigated the sillicon content enough to perform multi-pass welding of thicker rimmed steel, 20mm in thickness. And it was decided that the content must be over 0.5%Then they studied transtion temperatures of weld metals, depositited by the C. S. Arc Welding Process using various filler wires, by means of V-notch chary impact test.The temperatures ranged from-34°C to-92°C. The absorption energies at 0°C ranged from 5.3kgm/cm2 to 19kgm/cm2. These values were compared with those obtained by the submerged warc elding and by the arc welding with coated electrode of low hydrogen type.It was recognized that carbon contents of weld matals by the C. S. Arc Welding Process using low carbon filler wires (0.01%C) increased over that of filler wires and their values became a constant, about 0.1%C. But the value of porous weld metal was 0.05%C.