US 2026/0146308 A1Published application

Ni-cr-fe-mo alloys with excellent surface properties and their production methods

AssigneeNippon Yakin Kogyo Co., Ltd.

InventorsKenji MIZUNO, Daiki OGASAWARA

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Abstract

An Ni—Cr—Fe—Mo alloy consists of: in mass %, C: 0.03 to 0.30%, Si: 0.05 to 1.50%, Mn: 0.05 to 2.00%, P: not greater than 0.05%, S: not greater than 0.005%, Cr: 18.0 to 28.0%, Mo: 6.0 to 15.0%, Cu: not greater than 1.0%, Al: 0.01 to 0.50%, Ti: 0.01 to 0.40%, Nb: 0.02 to 0.60%, Fe: 15.0 to 22.0%, Co: 0.5 to 4.0%, W: 0.10 to 2.00%, B: 0.0001 to 0.0100%, N: 0.005 to 0.100%, O: 0.0001 to 0.0060%, Mg: 0.0001 to 0.0300%, Ca: 0.0001 to 0.0080%, and Ni and inevitable impurities as the remainder, in which at least one kind selected from MgO, CaO, MgO—CaO type oxide and MgO—CaO—NbO—TiO2 type oxide is contained as non-metallic inclusion, and the MgO—CaO—NbO—TiO2 type oxide contains, in mass %, NbO: 0.1 to 5.0% and TiO2: not greater than 20%.

Claims4

Dependent claims

A Ni—Cr—Fe—Mo alloy consisting of:

in mass %, C:
0.03 to 0.30%, Si:
0.05 to 1.50%, Mn:
0.05 to 2.00%, P:
not greater than 0.05%, S:
not greater than 0.005%, Cr:
18.0 to 28.0%, Mo:
6.0 to 15.0%, Cu:
not greater than 1.0%, Al:
0.01 to 0.50%, Ti:
0.01 to 0.40%, Nb:
0.02 to 0.60%, Fe:
15.0 to 22.0%, Co:
0.5 to 4.0%, W:
0.10 to 2.00%, B:
0.0001 to 0.0100%, N:
0.005 to 0.100%, O:
0.0001 to 0.0060%, Mg:
0.0001 to 0.0300%, Ca:
0.0001 to 0.0080%, and Ni and inevitable impurities as the remainder, wherein
at least one kind selected from MgO, CaO, MgO—CaO type oxide and MgO—CaO—NbO—TiO2 type oxide is contained as non-metallic inclusion, and
the MgO—CaO—NbO—TiO2 type oxide contains, in mass %, NbO:
0.1 to 5.0% and TiO2:
not greater than 20%, in a case in which the MgO—CaO—NbO—TiO2 type oxide is contained.

21 more elements

Dependencies are inferred from the claim text.