Solubility Product of VN in Austenite of High Cr Heat Resistant Steel
2003 年 43 巻 11 号 p. 1807-1813
詳細
2003 年 43 巻 11 号 p. 1807-1813
Dissolved V in austenite of 7%Cr-0.4%V-0.09%N steel (hereinafter, % means mass%) was measured and the solubility product of VN was determined as follows:
log([%V][%N]) = 4.38−(8436/T)
where T is the absolute temperature in K. The solubility product obtained is 3 to 5 times larger than those in the literature and about one order larger than that for iron. The decrease in the activity coefficient of nitrogen due to the presence of Cr and V in the experimental steel is responsible for the increase in the solubility product of VN.
