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Journal Articles International Journal of Cast Metals Research, The Year : 2008

Effect of antimony on the eutectic reaction of heavy section spheroidal graphite castings

Peio Larrañaga
  • Function : Author
Iker Asenjo
  • Function : Author
Jon Sertucha
  • Function : Author
Ramon Suarez
  • Function : Author
Inaki Ferrer
  • Function : Author

Abstract

There is a strong demand for heavy section castings made of spheroidal graphite with a fully ferritic matrix, e.g. for manufacturing hubs for windmills. Such castings with slow solidification process are prone to graphite degeneration that leads to a dramatic decrease of the mechanical properties of the cast parts. Chunky graphite is certainly the most difficult case of graphite degeneracy, though it has long been known that the limited and controlled addition of antimony may help eliminate it. The drawback of this remedy is that too large Sb additions lead to other forms of degenerate graphite, and also that antimony is a pearlite promoter. As part of an investigation aimed at mastering low level additions to cast iron melts before casting, solidification of large blocks with or without Sb added was followed by thermal analysis. Comparison of the cooling curves and of the microstructures of these different castings gives suggestions to understand the controlling nucleation and growth mechanisms for chunky graphite cells.

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hal-03574643 , version 1 (15-02-2022)

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Peio Larrañaga, Iker Asenjo, Jon Sertucha, Ramon Suarez, Inaki Ferrer, et al.. Effect of antimony on the eutectic reaction of heavy section spheroidal graphite castings. International Journal of Cast Metals Research, The, 2008, 22 (1-4), pp.192-195. ⟨10.1179/136404609X367669⟩. ⟨hal-03574643⟩
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