Compacted graphite cast iron as a new cast iron is an ideal material for engine parts, but its production process difficult, long production quality has been unstable since the factory was a serious rejection rate, up to 31.47% when the rejection rate, which still shrinkage defects in the most serious air. In this paper,6M/6L vermicular iron cylinder head for the gas shrinkage defects technology research theme, causes shrinkage in the gas-depth analysis based on the proposed compacted graphite iron cylinder...
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