Austenitic heat-resistant cast steel and method for manufacturing the same
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United States of America Patent
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Mar 10, 2016
app pub date -
Mar 18, 2014
filing date -
Mar 22, 2013
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Abstract
An austenitic heat-resistant cast steel includes 0.1% to 0.6% by mass of C, 1.0% to 3.0% by mass of Si, 0.5% to 1.5% by mass of Mn, 0.05% by mass or less of P, 0.05% to 0.3% by mass of S, 9% to 16% by mass of Ni, 14% to 20% by mass of Cr, 0.1% to 0.2% by mass of N, and the balance of iron and inevitable impurities, in which a matrix structure of the austenitic heat-resistant cast steel is composed of austenite crystal grains, and a ferrite phase is dispersed and interposed between the austenite crystal grains so as to cover the austenite crystal grains.
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