Cutter composed of Ni-Cr-Al Alloy
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United States of America Patent
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Mar 23, 2010
Grant Date -
Dec 11, 2008
app pub date -
Aug 4, 2008
filing date -
May 15, 2002
priority date (Note) -
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Abstract
A cutter is composed of a Ni—Cr—Al alloy containing from 32 to 44 mass percent of Cr, from 2.3 to 6.0 mass percent of Al, the balance being Ni, impurities, and additional trace elements and having a Rockwell C hardness of 52 or more. This Ni—Cr—Al alloy provides a cutter produced with a superior workability and by a significantly simplified process, having a low deterioration in the hardness even when heated in use, having excellent corrosion resistance and low-temperature embrittlement resistance, and satisfactorily maintaining the cutting performance for a long time.
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