论文部分内容阅读
本文用溶解度法、化学平衡法、固体电解质浓差定氧法等不同的方法研究了Fe-C-Sb,Fe-C-Sb-Ce,Fe-C-Sb-Y,He-Nb-Ce溶液在钢铁冶炼温度范围内(1300～1700℃)的热力学性质,得到铁液中相互作用系数与温度的关系式;1600℃时铁液中相互作用系数;金属间化合物CeSb、YSb的标准生成自由能与温度的关系;1600℃时反应Ce_2O_2S=2[Ce]+2[O]+[S]的平衡常数。用金相显微镜、扫描电镜、电子探针等方法研究了稀土、镁及锑对稀土镁球铁中石墨形貌的影响,球墨铸铁中锑与硫含量的关系,铈、镁,硫等元素的分布及铈降低铸铁中锑的危害性机理。
Fe-C-Sb-Ce, Fe-C-Sb-Y and He-Nb-Ce solutions were studied by different methods such as solubility method, chemical equilibrium method and concentration electrolyte oxygen concentration method The relationship between the interaction coefficient and the temperature in the molten iron is obtained from the thermodynamic properties in the temperature range of the steel smelting (1300 ~ 1700 ℃); the interaction coefficient in the molten iron at 1600 ℃; the standard formation free energy of the intermetallic compounds CeSb and YSb And the temperature; the equilibrium constant of Ce 2 O 2 S = 2 [Ce] +2 [O] + [S] at 1600 ℃. The effects of rare earth, magnesium and antimony on the morphology of graphite in rare earth magnesium nodules were studied by means of metallographic microscope, scanning electron microscope and electron probe. The relationship between antimony and sulfur content in ductile iron, the content of cerium, magnesium and sulfur Distribution and Mechanism of Cerium in Reducing Antimony in Cast Iron.