溶融Ni-Si-B系合金と固体ステンレス鋼(SUS304)との界面反応

概要

論文の詳細を見る
In this study, the kinetics of growth of the many kinds of phases at the brazed joint was investigated by using two types of the brazing foils, i.e., Nibal-4.5 mass % Si-3.2 mass %B (BNi-3) and Nibal-7.3 mass % Si-2.2 mass %B (Ni-Si-B) and by using SUS 304 stainless steel on the market as the base metal. The cross-sectional microstructures at the brazed joint were consisted of the microstructures of the base metal, the reaction layer and the remained brazed layer. From the results of EPMA analysis, it was found that the reaction layer contained chromium, boron and carbon elements. The thickness of the reaction layer was increased by increasing brazing time and temperature. The reaction layer at the brazed joint made with BNi-3 was thicker than the reaction layer at the brazed joint made with Ni-Si-B. It was elucidated that the reaction layer growth could be expressed by a parabola type equation. However, at long time brazing, the reaction layer growth could not be expressed by a parabola type equation. This phenomenon was caused by drying up of the element in the molten brazing foil. This phenomenon was named as the exhaustion phenomenon of the element. From the consideration of activation energy for reaction layer growth, it may be deduced that the growth of reaction layer at the brazed joint made with BNi-3 was controlled by diffusion of boron element in the reaction layer from the molten brazing filler metal and that the growth of reaction layer at the brazed joint made with Ni-Si-B was controlled by diffusion of chromium and/or nickel element from the molten brazing filler metal.
東海大学の論文

溶融Ni-Si-B系合金と固体ステンレス鋼(SUS304)との界面反応

スポンサーリンク

概要

著者

関連論文

スポンサーリンク