The Study of Vacuum Brazing Inconel 600 Using Three Fillers
Date Issued
2015
Date
2015
Author(s)
Chou, Shih-Kai
Abstract
The plate heat exchanger is featured with compact size as well as high efficiency, so it is widely applied in the field of high-performance heat exchanger. The technology of brazing is one of the most important factors to improve performance of heat exchanger. The plate heat exchanger is currently made by Cu brazing stainless steels for most major heat exchanger manufacturers in the world. However, Cu cannot be used in severely corrosive environment due to its insufficient corrosion resistance. Other alloy such as Inconel 625 has good corrosion resistance, but it is suffered from high cost or insufficient pressure resistance. In this research, three kinds of fillers, Cu foil, Ni/Fe-based VZ2106 foil, and Ni-based MBF51 foil, are applied in brazing Inconel 600 substrate in order to develop novel plate heat exchangers featured with low cost, high pressure resistance and high corrosion resistance. Based on the experimental result, Inconel600/VZ2106/Inconel600 and Inconel 600/MBF51/Inconel 600 brazed joints include BCr precipitates, but brazed joints still have good bonding strength. The mechanical strength of VZ2106 and MBF51 brazed joints are close to that of Inconel 600 substrate, so they are good filler alloys applied in making novel plate heat exchangers.
Subjects
Cu filler
Ni-based filler
Ni/Fe-based filler
Ni-based alloy
Microstructure
Shear strength
Type
thesis
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ntu-104-R02527008-1.pdf
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