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本文使用液淬法配合自射线照相及电子探针测定了稀土元素铈在铸铁商温各相中的分布。发现:在不同铸铁中,铈的相对分布有差异。在球铁中,液相,球墨内的铈含量多于奥氏体内的铈含量;铈在球墨中的含量随其致密度的不同而有差异,致密的球墨中铈较多,松散的球墨中铈较少。在蠕铁中,液相中的铈多予蠕墨和奥氏体;在灰铁中,片墨及夹杂中含一定量的铈,液相和奥氏体中贫铈。另外,随凝固的先后不同,石墨中的铈含量也不同。先形成的球墨与最后凝固区域的枝晶间石墨中铈较多,粗蠕墨中铈较少,石墨与奥氏体的共晶程度影响铈在石墨中的分布。
In this paper, the liquid quenching method combined with self-radiography and electron probe determination of rare earth element cerium in cast iron temperature in the distribution of each phase. Found: in different cast iron, the relative distribution of cerium differences. In the ductile iron, the content of cerium in the liquid phase and the nodules is more than the content of cerium in the austenite. The content of cerium in the nodules is different with the density of the nodules. The dense nodules contain more cerium, Less CE. In vermicular iron, cerium in the liquid phase is mostly vermicular and austenitic. In gray iron, the flake ink and inclusions contain a certain amount of cerium, and the liquid phase and austenite are depleted in cerium. In addition, with the different coagulation has graphite in the cerium content is also different. The first intergranular graphite and the final solidified zone have more cerium in the intergranular graphite and less cerium in the coarse-grained graphite. The eutectic degree of graphite and austenite affects the distribution of cerium in the graphite.