在Nb/C比接近于理想化学配比的含Nb微合金钢中,用电解分离沉淀物的方法铡定出碳化铌在γ-Fe中的溶解度积公式为: lg([Nb]·[C]~(0.875))_γ=2.97—7500/T±0.06 利用较新的热力学数据推导而得的碳化铌在γ-Fe和α-Fe中的溶解度积公式分别为: lg([Nb]·[C]~(0.875))γ=3.24—7150/T(1100—1600K), lg([Nb]·[C]~(0.875))_α=4.87—10060/T(300—1000K)
The solubility of niobium carbide in γ-Fe of a microalloy steel, in which the Nb/C ratio is approximately equal to the stoichimetrie ratio of the carbide, has been determined by means of electrolytic extraction: lg([Nb]·[C]~(0.875))_v=2.97—7500/T±0.06(850—1200℃) The solubilities of it in γ-Fe and α-Fe have also been derived using the latest thermodynamic data, following results were obtained: lg([Nb]·[C]~(0.875))_v=3.24—7150/T(1100—1600K) lg([Nb]·[C]~(0.875))_0=4.87—10060/T(300—1000K)
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