抄録
In the present work, attempts were made to develop a new type of cast iron, stainless spheroidal carbide cast iron whose chemical composition is x%C-20%Cr-10%Ni-y%V-Fe. This cast iron exhibits excellent characteristics in corrosion and abrasive resistance. In this cast iron, the morphology of vanadium-carbide was observed to change from flower-like carbide to spheroidal carbide when a proper quantity of Ni-Mg alloy was added.
After adding Ni-Mg alloy, when the melt is held at 1923K, spheroidal carbides are crystallized until 2700s When the melt is held 4200s or more, spheroidal carbides have a tendency to coagulate with each other and flower-like carbides are crystallized. We can conclude as follows.
1) In this cast iron, adding Ni-Mg alloy is effective for crystallizing spheroidal carbides.
2) When melt is held at 1923K after adding Ni-Mg alloy, fading of effect is slower than ductile cast iron.
