溶接学会論文集
Print ISSN : 0288-4771
フェライト単相で凝固するオーステナイト系ステンレス鋼溶接金属におけるアシキュラー状組織の形成に及ぼすマッシブ変態の影響
Cr-Ni系ステンレス鋼溶接金属の凝固・変態に関する研究(第5報)
井上 裕滋小関 敏彦大北 茂藤 雅雄
著者情報
ジャーナル フリー

1997 年 15 巻 2 号 p. 305-313

詳細
抄録

In austenitic stainless steel weld metals solidified as ferritic single phase, subsequent ferrite-to-austenite transformation could be massive when the postsolidification cooling is rapid as in GTA welding. On the other hand, this GTA weld metal shows acicular structure of ferrite and austenite at room temperature microstructure. The effect of massive transformation on the formation of acicular structure was investigated in this study using different thermal cycle patterns and quenching technique. Massive transformation occurs below the T0 temperature within the two-phase region of ferrite and austenite at a cooling rate of approximately 100K/sec. On cooling after the massive transformation, austenite continues to grow into retained ferrite epitaxially from massive austenite while ferrite precipitates again at twin boundaries within the massive austenite. This suggests that acicular structure of ferrite and austenite is formed even if the massive transformation occur. In this case, the grain refinement and rapid progress of structure formation are expected as compared with weld metals in which massive transformation does not occur.

著者関連情報
© 一般社団法人 溶接学会
前の記事 次の記事
feedback
Top