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Vol.26, No.2, 96 ~ 108, 1988
Title
The Characteristics of SCC Crack Propagation in 22Cr - 5.5 Ni - 3 Mo Duplex Stainless Steel Weldment
김충언Choong Un Kim, 강춘식Choon Sik Kang
Abstract
The characteristics of SCC crack propagation in duplex stainless steel weldment made by SMAW GTAW and GMAW processes were investigated in 42% MgCl₂,142℃ boiling solution. From these experiments, it could be concluded that the strycture anisotrpy of y phase as well as the phase ratio played an important role in SCC resistance. GTA and GMA weld metal showed higher SCC resistance than base meta1 because of randomly distributed γ phase. The crack in weld metal had same opportunity of receiving keying effect as that in base metal, but it had less possibility of intersecting γ phase. The SCC resistance of the SMA weld metal and the HAZ was lower than that of the base metal because their phase ratio deviated from the proper phase ratio.
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