Odlévání experimentální slitiny MoNiCr (Ni-14Mo-6Cr) pro reaktory IV. generace chlazené roztavenými solemi – MSR

to a new class of IVth generation reactors that
should be one of the possible energy source in the future.
It is necessary to develop and optimize new kinds
of materials for these purposes. nickel alloy Monicr
(ni-14Mo-6cr) was chosen due to high corrosion resistance
in condition of fluoride molten salts. this
single-phase alloy exhibits high deformation strengthening
and poor recrystallization during hot forming.
several melts of the Monicr alloy was carried out in range of 50 – 450 kg in a vacuum induction furnace
with a target to optimize the whole production process.
the alloy was cast into a sand mould with a binder
based on furan resin and into cast iron moulds. each
melt was differently deoxidized by elements with high
affinity to oxygen (al, Zr, si or their mixture). Impact of
deoxidation was evaluated by chemical analysis, metallographic
analysis including seM + eDX and by the
change of mechanical properties.