鋳鉄溶接部のピンホール発生に及ぼす母材成分の影響 [in Japanese] Influence of Component Elements of Flake Graphite Cast Iron on Pinhole Generation during Arc Welding [in Japanese]
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Cast iron specimens containing different contents of component elements were prepared for bead-on-pleat test. The results show that the amount of pinholes increases with increasing C, Si, Mn, Ni and Cu contents, while the amount of pinholes decreases with increasing P, S, Cr, Mo and Mg contents. The following conclusions were obtained. (1) Graphitizing elements, such as C, Si, Ni, and Cu and oxide forming elements such as Mn, Si at the interface between graphite and matrix, tend to promote the generation of pinholes easily. (2) Elements with give oxidation resistance or graphite growth resistance to cast irons, elements which tend to form oxide film on the cast iron surface, elements which segregate near the eutectic cell boundary, and elements which form more stable oxides than carbon monoxide all tend to reduce pinholes.
- THE JOURNAL OF THE JAPAN FOUNDRYMEN'S SOCIETY
THE JOURNAL OF THE JAPAN FOUNDRYMEN'S SOCIETY 79(1), 9-16, 2007-01-25
Japan Foundry Engineering Society