ニッケルおよびコバルトに溶解する炭素飽和溶解度および第3元素の影響
1961 年 47 巻 7 号 p. 897-902
詳細
1961 年 47 巻 7 号 p. 897-902
1) The solubility of graphite in pure cobalt and nickel was determined at various temperatures. Temperature dependence of graphite solubility in nickel and cobalt was as follows:
a) Nickel logNc=-875/T 0.521
b) Cobalt logNc=-1050/T-0.265
(2) The solubility of graphite in nickel-cobalt solutions was also determind at 1400°C. From these data, excess partial molar free energy was calculated to be about -300 cal/gram atom, and it showed that the solution of this alloy was not an ideal.
(3) Effects of alloying elements such as Si, Mn, Cr, V and Mo on the solubility of graphite in liquid Ni and Co were investigated at 1400°C. The interaction parameter of Wagner εXC=-(∂ln NXC/∂NX) was calculated and found comparable with that of liquid iron.
(4) With the systems Ni-Cr-Mn-C and Co-Cr-Mn-C the solubilities of graphite were determind at 1400°C. The experimental results were in good agreement with calculations from the ternary systems in dilute solution.
