DISTRIBUTION OF Ce AND S IN Fe-C-Si ALLOY AND THEIR INFLUENCE ON MORPHOLOGY OF GRAPHITE

Abstract

Abstract: Electrolytic extraction-radiometry and microradioautography techniques were used to study the distribution of nodulizing element Ce and anti-nodulizing element S in phases of high purity Fe-C-Si alloy.The results show that,besides forming inclusions,most of Ce atoms concentrate in graphite firstly.As the Ce content increases,the concentration of Ce in graphite tends to saturate,relatively large amount of Ce dissolves in the alloy.Usually,the sulphur also concentrates in graphite.However,it may exist in the form of FeS at the eutectic colony boundaries,if the concentration of S is at a quite high level.Very little amount of S dissolves in the alloy.The morphology of graphite depends upon the degree of saturation of Ce.It appears as nodular when Ce was saturated and,as vermicular while it was semi-saturated.

Key words: Ce.S.Fe-C-Si alloy, graphite

DU Weixi HAN Qiyong JIANG Qing ZHANG Zhongzhi ZHONG Weizhen LIU Shaoshou Jilin University of Technology,Changchun,China [Originally published in ACTA METALL SIN (CHINESE EDN) 24(5) 1988pp B313—B319,received 17 Octorber 1986;in revised form 3 April 19871 Beijing University of Science and Technology. DISTRIBUTION OF Ce AND S IN Fe-C-Si ALLOY AND THEIR INFLUENCE ON MORPHOLOGY OF GRAPHITE[J]. Acta Metallurgica Sinica (English Letters), 1989, 2(8): 87-93.

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DISTRIBUTION OF Ce AND S IN Fe-C-Si ALLOY AND THEIR INFLUENCE ON MORPHOLOGY OF GRAPHITE

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