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Some problems in the production of ductile （一些问题在生产的韧性）
Special Review
February 2008
Some problems in the production of
ductile irons by investment casting
Yu Bo, Cai Qizhou, Wei Bokang
(State Key Laboratory of Material Processing and Die Mould TechnologyI=Huazhong University of Science Technology, Wuhan
430074, P. R. China)
Abstract: Because of the excellent performance of ductile irons and the unique superiority of investment casting, the
preparation of complicated and thin-wall ductile iron castings by investment casting shows a good development
prospect. In this present work, combined with the actual product experiments, the characteristics of shell making,
spheroidization, inoculation and defect prevention are presented, and some suggestions are given for investment
casting of ductile iron.
Key Words: ductile iron; investment casting
CLC number: TG249.5 Document Code: A Article ID: 1672-6421(2008)01-007-05
1 Investment casting of ductile iron differences are as following: (1) the poor ability of slag-off and
difficulties in feeding presented in investment casting process
With the characteristics of high dimensional accuracy, good
because a complete gating and feeding system can not easily to
surface finish and being able to produce complex shape and ultra-
set up; (2) microstructures and properties of ductile irons are
thin wall castings, investment casting has already become an
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