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Microstructure of Induction Brazed Interface between Cobalt-based Alloy and Martensitic Stainless Steel using Ag-Cu-Zn Filler Metal

E. Warinsiriruk, I. Phung-on


Erosion shield plate made of Cobalt-based alloy (Stellite Grade 6) was joined to Martensitic stainless steel (SUS410) by induction brazing uing Ag-Cu-Zn filler alloy at 650-790 °C and investigated. The interfacial microstructures across the brazed joint were comprehensively evaluated. The intermetallic phases were founded in thin layer and phase transformation principle was used for explanations. This could be beneficial to the joining of the sandwich structure in the last state stream turbine.


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