Thermodynamics of Iron-Carbon-Lead and Iron-Carbon-Bismuth Solutions

用一种适应的等静力技术研究了铋和铅在液态和固态铁碳溶液中的热力学。在自由加工钢中使用铋代替铅，以及从自由加工废钢中去除铅，将受益于更好地了解炼钢操作中铅和铋在各相（液体、固体和蒸汽）之间的分布。本研究改进了先前铁铅和铁铋合金体系的研究结果。它包括添加碳含量对液态合金和δ铁铁氧体中铋和铅的化学势的影响。重点是确定模拟液态铁碳（铋，铅）溶液所需的相互作用系数作为温度和成分的函数。这项研究产生了对炼钢系统中铋和铅的分布进行可靠估计所需的热力学数据。它提高了美国高温热力学研究水平***

9419560 Schlesinger The thermodynamics of bismuth and lead in liquid and solid iron-carbon solutions are investigated using an adapted isopiestic technique. The use of bismuth in place of lead in free-machining steels and the removal of lead from free-machining steel scrap will benefit from a better understanding of lead and bismuth distribution between the phases (liquid, solid, and vapor) in steelmaking operations. This research improves on the results of previous investigations of the iron-lead and iron-bismuth alloy systems. It includes the effects of added carbon content on the chemical potential of bismuth and lead in liquid alloys and delta iron ferrite. The focus is on determining the interaction coefficients needed for modeling liquid iron-carbon-(bismuth, lead) solutions as a function of temperature and composition. %%% This research produces thermodynamic data needed for reliable estimates of the disposition of bismuth and lead in steelmaking systems. It advances the level of high temperature thermodynamic research performed in the U.S. ***