Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Effects of Nickel, Cobalt, Tungsten, Molybdenum, Chromium and Tin on the Activity Coefficient of Oxygen in Liquid Iron
Activity of oxygen in liquid steel-I
Sachio MATOBATakeshi KUWANA
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JOURNALS FREE ACCESS

1965 Volume 51 Issue 2 Pages 163-169

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Abstract

The equilibrium of oxygen in liquid iron with H2-H2O mixtures has been studied at 1550°C, 1607°C and 1663°C respectively.
Effects of nickel, cobalt, tungsten, molybdenum, chromium and tin on the activity of oxygen in liquid iron have been studied at 1600°C.
The data obtained are summarized as follows:
1. H2+O=H2O
log K1[=PH2O/PH2·a0]=7, 480/T-3.421
ΔF01=-34, 220+15.65T
2. The interaction parameter of oxygen in liquid iron, e′0:
e′0[=∂log f′0/∂[%O]]=-10, 130/T+4.94
3. The effects of alloying elements on the activity coefficient of oxygen in liquid iron:
e(Ni)0=∂log f(Ni)0/∂[%Ni]=+0.0053 Ni<40%
e(Co)0=∂log f(Co)0/∂[%Co]=+0.0080 Co<40%
e(W)0=∂log f(W)0/∂[%W]=+0.0117 W<20%
e(Mo)0=∂log f(Mo)0/∂[%Mo]=+0.0117 Mo<10%
e(Cr)0=∂log f(Cr)0/∂[%Cr]=+0.0117 Cr<12%
e(Sn)0=∂log f(Sn)0/∂[%Sn]=+0.0117 Sn<14%

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© The Iron and Steel Institute of Japan
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