| 摘要 |
PURPOSE:To prevent the carburization of the surface of a member by using a member not subjected to descaling as the material of the heat exchanger tube of a middle heat exchanger for FBR. CONSTITUTION:A member not subjected to surface descaling such as an sustenitic stainless steel member is used as the material of the heat exchanger tube of a middle heat exchanger for FBR. When the member having residual oxide scale on the surface is used, carburization is inhibited, so reduction in the ductility of the steel material and the embrittlement of the material due to carburization can be reduced. |
