Influence of Si, Ce ,Sb and Sn on Chunky Graphite Formation
The thirteen mother alloys, C％ + 1/3 Si％=4.45％, differing in their Si, Ce, Sb and Sn contents, were prepared using electrolytic iron, high purity Si and graphite, pure Ce, Sb and Sn. Seventy grams of these alloys was remelted in a high purity alumina crucible at 1450℃ under an Ar atmosphere, then cooled at 30Klmin for obtAlning their cooling curves. Their graphite morphologies were observed using an optical microscope, and an SEM for observing the threedimensional shapes using the samples, their matrix dissolved off by an acid-aqua solution, to confirm the chunky graphite. For discussing the influence of the Si and Ce contents on the chunky graphite formation, two experiments were carried out. In the first one,we changed the Si contents from 0 to 4％Si in the 0.15％Ce alloys,and for the second one,we used the 3.5 and 4％Si samples that differed in the Ce contents of 0.1 and 0.2％. In the third experiment, the influence of Sb and Sn on the chunky graphite formation was investigated using the 4％Si and O. 1％Ce samples. If the Si content is greater than 3.0％ , the volume fraction of the chunky graphite increases. We then discussed the interaction between the Si and Ce contents on the chunky graphite formation. The difference in the Si contents, 3.5％ and 4.0％ ,on the chunky graphite formation cannot be confirmed, nevertheless, we confirmed that the chunky graphite volume fraction in the 0.2％ Ce samples is higher than that of the O. 1％ Ce samples. The effect of the Sb and Sn additions on the prevention of chunky graphite formation cannot be confirmed due to their high Si contents. Therefore,we need further studies in this field.
chunky graphite spheroidal graphite graphite morphology solidification of cast iron
Hideo Nakae Masayuki Fukami Takayuki Kltazawa Ying Zou
Lab. for Mater. Sci. and Tech. ,Waseda Univ. ,169 -00512 -8 -26,Nishiwaseda,Shinjuku,Tokyo Japan Appl. Mech. and Eng. ,Waseda Univ. ,Present address ,JFE Steel Corp. Japan Appl. Mech. and Eng. ,Waseda Univ. ,Present address, Nippon Steel Corp Appl. Mech. and Eng. ,Waseda Univ.
国际会议
69th World Foundry Congress(第69届世界铸造会议 WFC 2010)
杭州
英文
393-397
2010-10-16（万方平台首次上网日期，不代表论文的发表时间）