Study on Minor Elements in Weld Steel with Submerged Arc Welding Using Fluxes of the System (CaO)-MnO-SiO_2
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概要
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Distributions of several non-metallic and alloying elements in low alloy steel welded with SAW method using the fluxes of the system CaO-MnO-SiO_2 were investigated with impulse fusion method and point analysis using IMA. The dependence of nitrogen increment upon CaO content in flux was remarkable and the increment increased with increasing CaO content whereas oxygen increment was scarcely changeable for the flux with constant SiO_2. These dependences were qualitatively interpreted from various properties of slag. However, it was indicated that investigations on fluxless welding process are necessitated in order to clarify the dependence on flux composition. Further, it was suggested that the maldis-tributions of calcium, aluminium, carbon and sulphur are attributed to the formation of inclusions. Distributions of silicon and manganese showed a little lower content in the middle region, respectively. It was also indicated that mass transfer process during welding must be clarified in order to explain the phenomenon.
- 大阪大学の論文
著者
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IWAMOTO Nobuya
Osaka University
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MAKINO Yukio
Osaka University
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Tsunawaki Yoshiaki
Osaka Sangyo Univ.
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TAIRA Tadaaki
Nippon Kokan K.K.
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AKAO Kazutaka
Nippon Kokan K.K.
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