Ni-base alloy

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United States of America Patent

PATENT NO 9828656
APP PUB NO 20150010427A1
SERIAL NO

14375581

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Abstract

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In a Ni-base alloy, an area-equivalent diameter D is calculated. D is defined by D=A1/2 from an area A of a largest nitride in a field of view when an observation area S0 is observed. This process is repeated in n fields of view for measurement, where n is the number of the fields of view for measurement, so as to acquire n pieces of data on D, and the pieces are arranged in ascending order D1, D2, . . . , Dn to obtain a reduced variate yj. The obtained values are plotted on X-Y axis coordinates, where an X axis corresponds to D and a Y axis corresponds to yj. In a regression line yj=a×D+b, yj is obtained when a target cross-sectional area S is set to 100 mm2. When the obtained yj is substituted into the regression line, the estimated nitride maximum size is ≦25 μm in diameter.

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Patent Owner(s)

Patent OwnerAddress
HITACHI METALS MMC SUPERALLOY LTDSAITAMA 3638510

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukuda, Tadashi Kitamoto, JP 54 265
Itoh, Masato Okegawa, JP 13 47
Matsui, Takanori Kitamoto, JP 15 21
Yaguchi, Kenichi Okegawa, JP 11 227

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