ALLOY CAST IRON AND MANUFACTURING METHOD OF ROLLING PISTON USING THE SAME
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United States of America Patent
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May 16, 2013
app pub date -
Nov 13, 2012
filing date -
Nov 14, 2011
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Abstract
An alloy cast iron, and a method of manufacturing a rolling piston for a rotary compressor includes, by weight, 3.0˜3.5% carbon (C), 2.2˜2.4% silicon (Si), 0.5˜1.0% manganese (Mn), 0.1˜0.3% phosphorus (P), 0.06˜0.08% sulfur (S), 0.7˜1.0% chrome (Cr), 0.6˜1.0% copper (Cu), and a residue formed of Fe and inevitable impurities, wherein 3˜8 vol % steadite structure is formed.
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