텅스텐이 첨가된 슈퍼 2상 스테인리스강의 내식성에 미치는 시효처리의 영향

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 23; no. 6; pp. 87 - 92
• Main Authors: 김수천(Soo-Chun Kim), 최한글(Han-Gul Choi), 김윤규(Yun-Kyu Kim), 이종문(Jong-Mun Lee), 박진환(Jin-Hwan Park), 강창룡(Chang-Yong Kang)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2009
• Subjects: 해양공학; Sigma phase σ상; Substitution of W 텅스텐의 치환; Super duplex stainless steel 슈퍼 2상 스테인리스강; Aging treatment 시효처리; Corrosion resistance 내식성; sigma; 2
• ISSN: 1225-0767; 2287-6715

The effect of aging on the precipitation of the $\sigma$ phase and the corrosion resistance in tungsten substituted super duplex stainless steels was investigated. The volume fraction of the $\sigma$ phase and the current density increased with aging at temperatures up to $750^{\circ}C$ and then decreased. With an increase in aging time, the volume fraction of the $\sigma$ phase and the current density also increased. The $\sigma$ phase hardly influenced the corrosion resistance. With the substitution of tungsten for molybdenum in super duplex stainless steel, the volume fraction of the $\sigma$ phase and the current density decreased remarkably.