Apparatus for semi-solid processing of a metal
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United States of America Patent
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Dec 7, 1999
Grant Date -
N/A
app pub date -
Nov 4, 1996
filing date -
Nov 4, 1996
priority date (Note) -
Expired
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Abstract
A fully dense powder metal cobalt-base article having high resistance to semi-solid metal wear and corrosion. The article has a constituent composition of C in an amount of about 0.65 to less than about 1%, W in an amount of about 3 to about 5%, Cr in an amount of about 25 to about 30%, Co in an amount principally comprising the balance of the article. The article has a hardness of greater than 42HRC and more preferably 45HRC, a bend fracture strength of greater than 330 ksi and substantial dimensional and mechanical property stability during exposure to temperatures in range of about 1100.degree. F. to 1500.degree. F.
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