Study of the effect of solidification on graphite flakes microstructure and mechanical properties of an ASTM a-48 gray cast iron using steel molds

Songklanakarin Journal of Science and Technology (SJST)

关键词: solidification;    graphite flakes microstructure;    mechanical properties;    ASTM A-48 gray cast iron;   

DOI  :  

来源: DOAJ

【 摘 要 】

The analysis of heat conduction is a widely used technique for control of metallurgical process and solidified eutecticalloy investigation. The objectives of this research are studies about the effect of solidification on graphite flakes microstructureand mechanical properties of an ASTM A-48 gray cast iron using SKD 11 tool steel, S45C medium carbon steel andSS400 hot-rolled steel molds. These three steel molds are important for heat conduction and different from other works. Thisanalysis involving thermocouples immersed in the molten cast alloy is convenient to quickly obtain solidified ingot data onthe behavior of solidification processing. This research intends to describe the thermal analysis using thermocouples, shapeof thermal field and the experimental boundary conditions. The Newtonian thermal analysis and the Fourier thermal analysisdiffer because of the number of used thermocouples. Mechanical properties of structural ASTM A-48 gray cast iron materialsstrongly depend on their microstructure. Metallographic sections are observed to quantitatively measure the relevant microstructuralparameters, as graphite lamellas morphology, eutectic cell size and inclusions content. Results are correlated tothe measured mechanical properties: reduced graphite content increases the tensile strength.

【 授权许可】

Unknown