溶融 Ni-Cu および Ni-Co 合金の珪素による脱酸平衡

概要

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The deoxidation of liquid nickel-copper and nickel-cobalt binary alloys with silicon has been studied at the temperatures ranging from 1450℃ to 1650℃ using silica crucible. On the nickel basis in nickel-copper binary, the deoxidation product, logK′_<Si(Ni-Cu)>, which increased with the addition of copper, was expressed to be : logK′_<Si(Ni-Cu)>=logK_<Si(Ni)>+0.0342[%Cu]-0.0004[%Cu]^2 Cu<40%, 0.5%Si, 1550℃∿1650℃ The effect of temperature on the equilibrium constants of the deoxidation reaction in copper, obtained by extrapolation, was estimated as follows : logK_<Si(Cu)>=-15680/T+2.16 1450℃∿1550℃ while the value of logK′_<Si(Ni-Cu)> on the copper basis was given by the expression : logK′_<Si(Ni-Cu)>=log K_<Si(Cu)>+0.012[%Ni]-0.0001[%Ni]^2 Ni<40%, 0.5%Si, 1450℃∿1550℃ On the nickel basis in nickel-cobalt binary, logK′_<Si(Ni-Co)> was represented to be as follows : logK′_<Si(Ni-Co)>=logK_<Si(Ni)>+0.005[%Co] Co<20%, 0.55%Si, 1550℃∿1650℃ The temperature dependence of the equilibrium constants for the deoxidation of cobalt was expressed to be : logK′_<Si(Co)>=-15270/T+1.81 1550℃∿1650℃ whereas logK′_<Si(Ni-Co)> on the cobalt basis was found to be : logK′_<Si(Ni-Co)>=logK′_<Si(Co)>-0.001[%Ni] Ni<60%, 0.55%Si, 1550℃∿1650℃ Using the values of deoxidation product, the interaction parameters of various alloying elements were calculated.
社団法人日本鉄鋼協会の論文
1991-03-01