著者

木俣 登 安藤 精一

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.40, no.9, pp.917-928, 1971-09-25 (Released:2011-08-05)

参考文献数

8

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In report 1, the manual arc welding of austenitic manganese steel to high carbon steel was studied, the main characteristic of which was to butter, before joining, the groove face of high carbon steel with austenitic covered electrode.This paper describes the results of some experiments on welding of the above two dissimilar metals by gas shielded arc welding process.To select appropriate welding wire and welding conditions for buttering, single bead weld test and FISCO cracking test were made using high carbon steel as base metal, five austenitic welding wire as electrode, and CO2, CO2-A, A or N2 as shielding gas.16 Mn-16 Cr and 25 Cr-20 Ni welding wire are available for buttering electrode and CO2-A for shielding gas from the viewpoints of weld metal hardness, microstructure, weld defects and crack susceptibility of weld metal.Carbon steel rail and austenitic manganese steel rail (50 PS type) were then welded together automatically by gas shielded arc welding process: The groove face of the former was buttered vertically with above-mentioned wires and shielding gas and rail welding apparatus, which could be used not only for rail joining by welding but also for buttering with some modifications. An austenitic manganese steel rail was welded to the buttered carbon steel rail with I-groove and almost the same welding conditions as in the case of gas shielded arc welding of austenitic manganese steel rails investigated previously by the authors. The values of maximum load and deflection in bending tests of welded rails were 75-85 t and 56-84 mm with head-up (span 1 m, load applied at mid span) and they are almost equal to the welds by manual arc welding with V-or I-groove joint.Welding takes about 11 minutes for buttering and 7.5 minutes for joining.