Abstract ▼ AI-Helper

It is the purpose of this study to clarity the influence of carbon content on the thermal properties of CV graphite cast iron. Therefore the thermal expansion coefficient and thermal conductivity of DCI (ductile cast iron) and GC (gray cast iron) were compared with CV (compacted vermicular graphite ...

It is the purpose of this study to clarity the influence of carbon content on the thermal properties of CV graphite cast iron. Therefore the thermal expansion coefficient and thermal conductivity of DCI (ductile cast iron) and GC (gray cast iron) were compared with CV (compacted vermicular graphite cast iron), and investigated, having the change of the 5 steps about content of carbon from 2.7 wt% to 3.6 wt% C. The main results obtained by theoretical considerations are as follows; 1. As the carbon content in CV and DCI is increasing, graphite is coarsening and the number is decreasing, and GC has changed into A type and B type from E type. 2. The hardness of cast iron is decreasing as to the increasing in the content of carbon and GC is much wider than DCI and CV in the range of decrease. 3. Under the same condition, wear resistance is superior in the order of DCI, CV and GC but the sliding speed giving rise to abrasive wear is rapider in the order of DCI, CV and GC representing the maximum wear resistance around 22.9 wt% of the content of carbon. 4. Thermal expansion coefficient in cast iron is growing in the order of DCI, CV and GC, and tends to grow a little as the content of carbon is increasing , but the width of growth is very small. 5. Thermal conductivity in cast iron is growing in the order of GC, CV and DCI, as the content of carbon is increasing, and the width of growth is much bigger in GC, CV than DCI.

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