銅及び銅合金鋳物の溶接性に及ぼす脱酸剤の影響
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概要
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To investigate how hot cracking occurs during welding, arc spot testing and MIG welding were conducted on cast copper plates produced under different deoxidizing conditions for improving weldability. Hot cracked surfaces were examined analytically by scanning electron microscopy. Much more cracks formed in the cast copper plates deoxidized by P than in the plates deoxidized by Si. Hot cracks occured at the grain boundary and the characteristics of liquation cracking were observed on cracked surfaces. Substances having low melting points were likely to be formed at the grain boundary which may be a result of excess deoxidizer, P, or complex reaction products, CuO-P2O5, after deoxidation. Although hot cracks formed rarely in cast copper plates deoxidized by Si, castability was not so good with respect to fluidity during casting.
- 日本鋳造工学会の論文
日本鋳造工学会 | 論文
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