镍基合金在熔银铜钯钎料中的溶解度和溶解速率

T. Ikeshoji, Y. Watanabe, A. Suzumura, T. Yamazaki
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引用次数: 3

摘要

在用Pd基钎料钎焊铁镍基高温合金管对火箭发动机喷嘴裙架总成进行钎焊过程中,有时会在管表面刻下侵蚀腐蚀坑。腐蚀被认为是由熔融钎焊填料的动态流动辅助的。为了估计侵蚀腐蚀的程度和防止侵蚀腐蚀,实验测量了Ni在钎料熔液中的溶解度和溶解速率。将加入Ag-Cu-Pd钎料的Ni坩埚加热至1320K,经过不同保温时间后进行淬火。利用图像处理技术对钎焊填料凝固后截面的显微组织进行了观察,并估算了Ni的溶解量。溶解度约为5.53mass%,初始溶出速率为6.28 × 10-3mass%/s。利用这些数据,将能够进行更精细的动态流动模拟。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Solubility and Dissolution Rate of Ni Base Alloy to Molten Ag-Cu-Pd Brazing Filler
During the brazing process of the rocket engine’s nozzle skirt assembly made from Fe-Ni based super alloy pipes with Pd based brazing filler, the erosion corrosion pits were sometimes engraved on those pipes’ surface. The corrosion is considered to be assisted by the dynamic flow of the molten brazing filler. In order to estimate the amount of erosion corrosion and to prevent it, the solubility and the dissolution rate of Ni to the molten Ag-Cu-Pd brazing filler are measured experimentally. The Ni crucible poured with the Ag-Cu-Pd brazing filler was heated up to 1320K and quenched after the various keeping time. The microstructure of the solidified brazing filler part’s cross sections was observed, and the amount of the dissolved Ni was estimated using the image processing technique. The solubility was about 5.53mass%and the initial dissolution rate was 6.28 × 10-3mass%/s. Using these data, more elaborate dynamic flow simulation will be able to conduct.
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