Production of Compacted Graphite Irons Through Two-Step Treatment Method

Authors

  • O. M. Suarez
  • C. R. Loper Jr.

Abstract

A study of compacted graphite iron production in a laboratory environment was conducted by carefully monitoring the chemical composition of the charge material, the thermal history of the melt and the addition of trimming alloys. The procedure, consisting of a two-stage process, was based on the reoxidation of a magnesium-treated melt by pouring the treatment ladle into the post-treatment furnace where the melt was reheated above 1400ºC. An in-stream inoculation with 75% ferrosilicon inoculant was incorporated during final pouring. After final inoculation, the resulting microstructure was that of a compacted graphite iron with no carbide formation. The experimental process produced graphite with consistent compacted morphology without the use of titanium that could have been detrimental to tool life upon machining.

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Published

2013-09-05

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Section

Articles