US2011041960A1PendingUtilityA1

High rigidity, high damping capacity cast iron

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Assignee: TOSHIBA MACHINE CO LTDPriority: May 30, 2008Filed: Nov 5, 2010Published: Feb 24, 2011
Est. expiryMay 30, 2028(~1.9 yrs left)· nominal 20-yr term from priority
Inventors:Sakae TakahashiRyousuke FujimotoNaoki Sakamoto
C22C 33/08B22D 27/20C21D 5/00C22C 37/10C22C 37/00B22D 25/06C21D 6/00
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Abstract

A high rigidity, high damping capacity cast iron, which is a cast iron containing 3 to 7% of Al, and produced by heating at 280 to 630° C. after casting, and then cooling.

Claims

exact text as granted — not AI-modified
1 . A high rigidity, high damping capacity cast iron, consisting of a cast iron containing 3 to 7% of Al, and produced by heating at 280 to 630° C. after casting, and then cooling. 
     
     
         2 . A high rigidity, high damping capacity cast iron, consisting of a cast iron containing 3 to 7% of Al and 0.03 to 0.20% of Sn, and produced by heating at 280 to 630° C. after casting, and then cooling. 
     
     
         3 . A high rigidity, high damping capacity cast iron, consisting of a cast iron containing 3 to 7% of Al, and C and Si in such amounts that a carbon equivalent represented by formula (1) below is from 3.30 to 3.95, and produced by heating at 280 to 630° C. after casting, and then cooling:
   Carbon equivalent (%)=C content (%)+(⅓)×Si content (%)  (1)

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