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US 2023/0416877 A1Published application
Super-heat-resistant alloy
AssigneeKorea Institute of Materials Science
InventorsJeong Hyeon DO, In Soo KIM, Joong Eun JUNG, Baig Gyu CHOI, Woo Young SEOK, Yu Hwa LEE
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Abstract
Provided is a super-heat-resistant alloy consisting of aluminum (Al): 4.0 wt % to 5.2 wt %, cobalt (Co): 1.0 wt % to 10.0 wt %, chromium (Cr): 5.0 wt % to 8.0 wt %, molybdenum (Mo): 0.5 wt % to 2.0 wt %, tantalum (Ta): 7.0 wt % to 10.0 wt %, titanium (Ti): 0 wt %<Ti≤1.5 wt %, tungsten (W): 7.0 wt % to 10.5 wt %, and nickel (Ni): balance, and not containing rhenium (Re).
Claims7
A super-heat-resistant alloy consisting of aluminum (Al):
- 4.0 wt % to wt %, cobalt (Co):
- 1.0 wt % to 10.0 wt %, chromium (Cr):
- 5.0 wt % to 8.0 wt %, molybdenum (Mo):
- 0.5 wt % to 2.0 wt %, tantalum (Ta):
- 7.0 wt % to 10.0 wt %, titanium (Ti):
- 0 wt %<Ti≤1.5 wt %, tungsten (W):
- 7.0 wt % to 10.5 wt %, and nickel (Ni):
- balance, and not containing rhenium (Re),
- wherein a creep resistance sustainability of the super-heat-resistant alloy according to Equations 1 and 2 below is greater than or equal to 60%.
- Stable creep resistance time (hours)=tmax−tmin <Equation 1>
- in a period of time satisfying
- [εt(i)−εt(i−1)]/[t(i)−t(i−1)]≤0.005(%/hours)
- (where εt(i) denotes a creep strain of the super-heat-resistant alloy at time t(i), εt(i−1) denotes a creep strain of the super-heat-resistant alloy at time t(i−1), tmax denotes a maximum time value in the period of time, and tmin denotes is a minimum time value in the period of time.)
- Creep resistance sustainability=[(Stable creep resistance time)/(Total CreepLife)×100] <Equation 2>
- (where the stable creep resistance time and the total creep life are measured under conditions of 1100° C. and 137 MPa.)
12 more elements
A super-heat-resistant alloy consisting of aluminum (Al):
- 4.0 wt % to wt %, cobalt (Co):
- 1.0 wt % to 10.0 wt %, chromium (Cr):
- 5.0 wt % to 8.0 wt %, molybdenum (Mo):
- 0.5 wt % to 2.0 wt %, tantalum (Ta):
- 7.0 wt % to 10.0 wt %, titanium (Ti):
- 0 wt %<Ti≤1.5 wt %, tungsten (W):
- 7.0 wt % to 10.5 wt %, hafnium (Hf):
- 0 wt %<Hf≤1.5 wt %, and nickel (Ni):
- balance, and not containing rhenium (Re),
- wherein a creep resistance sustainability of the super-heat-resistant alloy according to Equations 1 and 2 below is greater than or equal to 60%.
- Stable creep resistance time (hours)=tmax−tmin <Equation 1>
- in a period of time satisfying
- [εt(i)−εt(i−1)]/[t(i)−t(i−1)]≤0.005(%/hours)
- (where εt(i) denotes a creep strain of the super-heat-resistant alloy at time t(i), εt(i−1) denotes a creep strain of the super-heat-resistant alloy at time t(i−1), tmax denotes a maximum time value in the period of time, and tmin denotes is a minimum time value in the period of time.)
- Creep resistance sustainability=[(Stable creep resistance time)/(Total CreepLife)×100] <Equation 2>
- (where the stable creep resistance time and the total creep life are measured under conditions of 1100° C. and 137 MPa.)
13 more elements
Dependencies are inferred from the claim text.