Four-wire submerged arc welding process with DC-AC power combination for production of high toughness line pipe.
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概要
- 論文の詳細を見る
The method for improving the weld metal toughness and new welding process for high speed welding have been investigated.The formation of acicular ferrite microstructure is essential for high weld metal toughness, for which Ti-B bearing low oxygen weld metal is needed.Highly basic fused flux has been developed, which could maintain low oxygen content in spite of increasing the welding speed.To increase the welding speed, use of DC power supply for first arc is effective. Based on the knowledge for three-wire welding process, DC AC-AC-AC powered four-wire submerged arc welding process has been developed and applied for line pipe production, which contributed to high productivity and high quality.
- The Iron and Steel Institute of Japanの論文
The Iron and Steel Institute of Japan | 論文
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