Fe—Cr—Ni alloy and method for production thereof

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United States of America Patent

PATENT NO 11118250
APP PUB NO 20200347488A1
SERIAL NO

16335042

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Abstract

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Ti, N, Al, Mg, and Ca concentrations are controlled in order to prevent aggregation of TiN inclusions. Furthermore, not only is a Fe—Cr—Ni alloy having superior surface property provided, but also a method is proposed in which the Fe—Cr—Ni alloy is produced at low cost using commonly used equipment. The Fe—Cr—Ni alloy includes C≤0.05%, Si: 0.1 to 0.8%, Mn: 0.2 to 0.8%, P≤0.03%, S≤0.001%, Ni:16 to 35%, Cr: 18 to 25%, Al: 0.2 to 0.4%, Ti: 0.25 to 0.4%, N≤0.016%, Mg: 0.0015 to 0.008%, Ca≤0.005%, O: 0.0002 to 0.005%, freely selected Mo: 0.5 to 2.5% in mass % and Fe and inevitable impurities as the remainder, wherein Ti and N satisfy % N×% Ti≤0.0045 and the number of TiN inclusions not smaller than 5 μm is 20 to 200 pieces/cm2 at a freely selected cross section.

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Patent Owner(s)

Patent OwnerAddress
NIPPON YAKIN KOGYO CO LTD5-8 KYOBASHI 1-CHOME CHUO-KU TOKYO 104-0031

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baba, Yosuke Kawasaki, JP 10 53
Kobayashi, Yusuke Kawasaki, JP 210 868
Mizuno, Kenji Kawasaki, JP 34 235
Nishijima, Waki Kawasaki, JP 1 3
Todoroki, Hidekazu Kawasaki, JP 7 11

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