抄録
The purpose of this experiment is to make self fluxing nickel alloy for trial as a basis of eventual industrial production. Alloying elements were charged in a vacuum melting furnace, using Ni-B, Fe-B and metallic boron as boron source.
The melt was cast and then pulverized by atomizing process. The powder was sprayed to the coating 1-1.5mm thick, which was investigated concerning self fluxing, and corrosion and heat resistivity, comparing with the Colmonoy No. 6, Metco 16C and 14C.
The result was as follows:
1) The specimens melted with Fe-B and Ni-B (thermit) were rather difficult in metallizing and its high aluminum content and made its melting point high.
2) The specimens melted with the metallic boron and Ni-B (deoxidization by silicon) were easy in metallizing.
3) With Geiger counter X ray diffractiometer the characteristic lines of CrB, Cr2B and Cr3B4 were observed with all the powders.
4) Corrosion resistivity in HCl and H2SO4 acid solution of the metallized specimen is much higher than that of 18-8 stainless steel.
