Nickel-based heat-resistant alloy

Details Nickel-based heat-resistant alloy Nickel-based heat-resistant alloy

2005-07-26

2005-07-26

Sheehan, John P. (Department: 1742)

Metal treatment

Stock

Containing over 50 per cent metal, but no base metal

C148S428000, C420S445000, C420S448000, C420S450000, C420S584100, C420S588000

Reexamination Certificate

active

06921442

ABSTRACT:
The present invention relates to a Ni base alloy having sufficient strength at high temperatures and high corrosion resistance at high temperatures in a high-temperature composite corrosive environment in which chlorination or sulfidation occurs simultaneously with high-temperature oxidation, without excessive cooling or surface protection. According to the present invention, a Ni base alloy having high-temperature strength and corrosion resistance includes Cr in a range of from 25 to 40 weight %, Al in a range of from 1.5 to 2.5 weight %, C in a range of from 0.1 to 0.5 weight %, W of 15 weight % or less, Mn of 2.0 weight % or less, Si in a range of from 0.3 to 6 weight %, Fe of 5% or less, and Ni of rest except inevitable impurities. When strength at high temperatures is allowed to be small, W is in a range of from 0 to 8%, and Si is in a range of from 0.3 to 1% or from 1 to 6%. In order to enhance strength at high temperatures, W is in a range of from 8 to 15, and Si is in a range of from 0.3 to 1% or from 1 to 6%.

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