Mixed graphite cast iron for automotive exhaust component applications

Abstract

Both spheroidal graphite iron and compacted graphite iron are used in the automotive industry. A recently proposed mixed graphite iron exhibits a microstructure between the conventional spheroidal graphite iron and compacted graphite iron. Evaluation results clearly indicate the suitability and benefits of mixed graphite iron for exhaust component applications with respect to casting, machining, mechanical, thermophysical, oxidation, and thermal fatigue properties. A new ASTM standard specification (A1095) has been created for compacted, mixed, and spheroidal graphite silicon-molybdenum iron castings. This paper attempts to outline the latest progress in mixed graphite iron published.

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Correspondence to De-lin Li.

Additional information

*De-lin Li Male, born in 1970, Ph.D., Sr. Research Scientist and casting group leader of CanmetMATERIALS, Natural Resources Canada. Research interests: cast irons, cast steels, steelmaking metallurgy, bio-steels and battery materials.

Funding for this work was provided by the Natural Resources Canada through the Program of Energy Research and Development. The paper is partly taken from Ref [3]. The author would like to thank Drs. M. S. Kozdras and S. Kuyucak for their insightful reviews. Wescast Industries Inc. permission of Figure 5 and publishing some results is acknowledged. (The Crown Copyright of Canada)

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Li, D. Mixed graphite cast iron for automotive exhaust component applications. China Foundry 14, 519–524 (2017). https://doi.org/10.1007/s41230-017-7080-4

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Keywords

  • SiMo iron
  • spheroidal graphite
  • compacted graphite
  • mixed graphite
  • exhaust components
  • brittleness at medium temperature
  • thermal fatigue cycles

CLC numbers

  • TG143.49/143.5

Document code

  • A