Ni-Cr-Si-B系ろう材を用いたインコネル600と軟鋼の接合

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In this paper, the brazeability of nickel base brazing foil and the kinetics of growth of the many kinds of phases at the brazed joint were investigated by using two types of the brazing foils, Nibal-13mass% Cr-4.2mass% Fe-4.5mass% Si-2.8mass% B (BNi-1) and Nibal-7mass% Cr-3mass% Fe-4.5mass% Si-3.2mass% B (BNi-2) and by using Inconel 600 and steel as the base metals. The T-joint method was adopted to investigate the brazeability of the brazing foils and the kinetics of growth of the many kinds of phases. After brazing, the good shape fillet was obtained on the brazed joint at every brazing condition. In the case of BNi-1,the reaction layer was only observed on the steel side near the interface. This reaction layer contained iron and carbon elements. The thickness of the reaction layer was increased by increasing brazing time and it was elucidated that the reaction layer growth could be expressed by parabola type equation except on short time brazing. In the case of BNi-2,two types of the reaction layer were only observed on the Inconel 600 side. The thickness of the two types of the reaction layer was increased by increasing brazing time. And it was elucidated that the reaction layer growth which was named the coarsed grain region could be expressed by parabola type equation except on long time brazing. At long time brazing the reaction layer growth could not be expressed by parabola type equation. It seemed that this phenomenon was caused by drying up of the element in the molten brazing foil.
東海大学の論文

Ni-Cr-Si-B系ろう材を用いたインコネル600と軟鋼の接合

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