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Effect of Mold Hardness on Microstructure and Contraction Porosity in Ductile Cast Iron

Khalil Allafi, J ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/S1006-706X(11)60048-4
  3. Publisher: 2011
  4. Abstract:
  5. The effect of mold hardness on the microstructure of ductile iron and the contraction porosity was investigated. Molds with different hardnesses (0.41, 0.48, 0.55, 0.62 MPa) and a sand mold prepared by Co2 method were used. The influence of silicon content on the induced expansion pressure owing to the formation of graphite was also investigated. The contraction during solidification can be compensated by an induced expansion owing to the graphite relief when the hardness of mold increases; therefore, the possibility of achieving a sound product without using any riser increases
  6. Keywords:
  7. Carbide ; Ductile iron ; Graphite ; Preheating temperature ; Shrinkage porosity
  8. Source: Journal of Iron and Steel Research International ; Volume 18, Issue 4 , 2011 , Pages 44-47+67 ; 1006706X (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1006706X11600484