Ni—Cr—Mo—Nb alloy
AssigneeNippon Yakin Kogyo Co., Ltd.
InventorsTaiki Maeda, Fugao Wei
Life of this patent
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Abstract
A Ni—Cr—Mo—Nb alloy consists of, in mass %, C: not more than 0.020%, Si: 0.02 to 1.0%, Mn: 0.02 to 1.0%, P: not more than 0.03%, S: not more than 0.005%, Cr: 18.0 to 24.0%, Mo: 8.0 to 10.0%, Al: 0.005 to 0.4%, Ti: 0.1 to 1.0%, Fe: not more than 5.0%, Nb: 2.5 to 5.0%, N: 0.002 to 0.02%, and at least one of W: 0.02 to 0.3% and V: 0.02 to 0.3%, and Ni as a remainder and inevitable impurities, in which an freely selected cross section of alloy, sum of number of particles of NbC carbide and (Ti, Nb)N nitride is 100 to 1000 particles/mm2, number of particles of the NbC carbide is not more than 40 particles/mm2, and number of particles of the (Ti, Nb)N nitride is 100 to 1000 particles/mm2.
Claims8
A Ni—Cr—Mo—Nb alloy consisting of:
- in mass %, C:
- not more than 0.020%, Si:
- 0.02 to 1.0%, Mn:
- 0.02 to 1.0%, P:
- not more than 0.03%, S:
- not more than 0.005%, Cr:
- 18.0 to 24.0%, Mo:
- 8.0 to 10.0%, Al:
- 0.005 to 0.4%, Ti:
- 0.1 to 1.0%, Fe:
- not more than 5.0%, Nb:
- 2.5 to 5.0%, N:
- 0.002 to 0.02%, and at least one of W:
- 0.02 to 0.3% and V:
- 0.02 to 0.3%, and Ni as a remainder and inevitable impurities,
- wherein in a freely selected cross section of alloy, a sum of number of particles of NbC carbide and number of particles of (Ti, Nb) N nitride is 100 to 1000 particles/mm2, the number of particles of NbC carbide is not greater than 40 particles/mm2, and the number of particles of (Ti, Nb) N nitride is 100 to 1000 particles/mm2.
Dependencies are inferred from the claim text.