脱酸劑を含む鋼用ガス熔接棒の化学組成および熔接諸條件の影響について(第 2 報) : 熔接棒径, 火口内径, アセチレンの状況および火焔型式の影響

概要

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In this report, effects of rod-diameter, nozzle-diameter, acetylene-condition and flame-type on usability of gas welding rod and mechanical properties of gas weld steels were investigated, using the welding rod III containing 1.37% Mn and 0.13% Si and by the same way as the report 1. The results obtained are as follows : 1. In case of thicker base plates, excellent welds were obtained by adopting comparatively large diameters of rod and nozzle. 2. Bend test results of welded joints obtained by the use of genetator acetylene were little different from those by by the use of dissolved acetylene. 3. When an extreme carburizing flame or an oxidizing flame, whose core-length was below about 8mm in case of the nozzle number "500", was adopted, the bend test result of welded joint was bad.
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