| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.19 ( November 1988 ) Steel Pipe ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Optimizing Welding Condition for Excellent
Corrosion Resistance in Duplex Stainless
Steel Linepipe Katsuomi Tamaki, Koichi Yasuda, Mitsuo Kimura, Hiroaki Kawasaki, Tatsufumi Uegaki |
| Synopsis: The corrosion resistance of the girth weld heat affected zone(HAZ) of duplex stainless steels was discussed in connection with hostile environment linepipe applications. The girth weld HAZ produced with a slow cooling rate welding procedure using a high pitting index base metal (Cr+3Mo+16N=34.0%) showed the same corrosion resistance as the base metal, even in the as-welded condition. This is considered that the slow cooling rate allows sufficient time for the chromium to heal the chromium depleted area adjacent to chromium nitride precipitates. |
| TextiPDF: 7P/416kbj |