溶接学会論文集
Print ISSN : 0288-4771
フェライト単相で凝固するCr-Ni系ステンレス鋼溶接金属の凝固・変動挙動
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4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. 292-304

詳細
抄録

In Fe-Cr-Ni stainless steel weld metals which solidify as ferritic single phase, austenite first precipitates at ferrite grain boundaries on cooling. Then continuous intergranular austenite is formed by the coalescence of globular austenite along grain boundaries. The austenite has the K-S relationship with ferrite of both side, selecting different combinations of close-packed plane and direction for each ferrite. Subsequently, Widmanstatten austenite, which has the same cystallographic characteris-tics of the intergranular austenite, grow into the ferrite grain. In duplex stainless steel weld metals containing nitrogen, intragranular austenite precipitates after the formation of intergranular austenite. Diffusion of nitrogen primarily controls the precipitation of both inter- and intragranular austenite. With increasing Cr and Ni contents, the precipitation of the intragranular austenite increase due to the increase in microsegregation during solidification.

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