Welding material for ferritic heat-resistant steel, welded joint for ferritic heat-resistant steel, and method for producing welded joint for ferritic heat-resistant steel

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United States of America Patent

PATENT NO 11090755
APP PUB NO 20180354059A1
SERIAL NO

16060121

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Abstract

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The present invention provides a welding material for ferritic heat-resistant steel, a welded joint for ferritic heat-resistant steel, and a method for producing the welded joint for to form a weld metal having a high creep strength and a high toughness in welding a ferritic heat-resistant steel that contains B. The welding material for ferritic heat-resistant steel has a chemical composition containing, in mass %, C: 0.06 to 0.10%, Si: 0.1 to 0.4%, Mn: 0.3 to 0.7%, Co: 2.6 to 3.4%, Ni: 0.01 to 1.10%, Cr: 8.5 to 9.5%, W: 2.5 to 3.5%, Nb: 0.02 to 0.08%, V: 0.1 to 0.3%, Ta: 0.02 to 0.08%, B: 0.007 to 0.015%, N: 0.005 to 0.020%, with the balance being Fe and impurities, and satisfying Formula (1):

description='In-line Formulae' end='lead'0.5≤Cr+6Si+1.5W+11V+5Nb+10B−40C−30N−4Ni−2Co−2Mn≤10.0  (1).description='In-line Formulae' end='tail'

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Patent Owner(s)

  • 501 NIPPON STEEL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hamaguchi, Tomoaki Tokyo, JP 6 14
Hirata, Hiroyuki Tokyo, JP 60 410
Jotoku, Kana Tokyo, JP 18 13
Ono, Toshihide Tokyo, JP 17 56
Tanaka, Katsuki Tokyo, JP 14 6

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