CN1257936A - High-temp Ni-based cast alloy - Google Patents
High-temp Ni-based cast alloy Download PDFInfo
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- CN1257936A CN1257936A CN 98121097 CN98121097A CN1257936A CN 1257936 A CN1257936 A CN 1257936A CN 98121097 CN98121097 CN 98121097 CN 98121097 A CN98121097 A CN 98121097A CN 1257936 A CN1257936 A CN 1257936A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 38
- 239000000956 alloy Substances 0.000 title claims abstract description 38
- 238000005275 alloying Methods 0.000 claims description 5
- 239000000470 constituent Substances 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000002844 melting Methods 0.000 description 11
- 230000008018 melting Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 4
- 230000002045 lasting effect Effects 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000601 superalloy Inorganic materials 0.000 description 2
- 208000002193 Pain Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910007727 Zr V Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000036407 pain Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
A high-temp Ni-based cast alloy contains C (0.07-0.13 wt.%), B (0.007-0.012 wt.%), Ce (0.002-0.02 wt.%), Co (9-11 wt.%), Cr (8.5-9.5 wt.%), Mo (2.5-3.5 wt.%), Al (4.8-5.7 wt.%), Ti (4.1-4.7 wt.%) and Ni (the rest). The impurities in it are S (less than 0.01), P (less than 0.01), Si (less than 0.2), Pb (less than 0.0005), Bi (less than 0.0001), Mn (less than 0.2) and Fe (less than 0.5). Its advantages are higher initial smelting temp, high cold or hot fatigue resistance and low density. It can be used for aeroengine.
Description
The present invention relates to Materials science, a kind of casting nickel base superalloy that is used for aircraft engine is provided especially.
Along with development of Aeroengines, its turbine inlet temperature improves constantly, and requires turbine material that higher thermotolerance is arranged.Resembling turning vane, is one of part that is subjected on the engine thermal shocking maximum, so blade material must have higher initial melting temperature and good cold-and-heat resistent fatigue property, with fierceness changes and high temperature causes crackle and the burn of avoiding temperature.For turbine blade, though working temperature is lower than turning vane, but still will be subjected to the impact of high-temperature fuel gas, so cold-and-heat resistent fatigue is important performance requriements equally.Simultaneously, in order to improve the thrust-weight ratio of engine, turbine material will be at pains to reduce density.According to above-mentioned analysis as can be seen, developing one has high initial melting temperature, and high cold-and-heat resistent fatigue property, low-density blade alloy are very necessary.From existing cast blade alloy, when having low density often, initial melting temperature is lower, and has the alloy of high initial melting temperature, and density is higher again.
The object of the present invention is to provide a kind of cast blade alloy, not only have higher initial melting temperature, have high cold-and-heat resistent fatigue property and low density again, can satisfy the needs of the aircraft engine that higher use properties requirement is arranged.
The invention provides a kind of cast nickel-base alloy, it is characterized in that: alloying constituent following (wt%)
C B Ce Co Cr 0.07～0.13 0.007～0.012 0.002～0.02 9.0～11.0 8.5～9.5
Mo Al Ti Ni
2.5 surplus in the of～3.5 4.8～5.7 4.1～4.7
Its foreign matter content element is controlled to be: S≤0.01, P≤0.01, Si≤0.2, Pb≤0.0005, Bi≤0.0001, Mn≤0.2, Fe≤0.5.
Best composition is C 0.10 among the present invention, and B 0.01, and Ce 0.005, and Co 10.0, and Cr 9.0, Mo3.0, and Al 5.5, and Ti 4.4, and Ni is surplus.
The present invention is on the basis of K417G alloy, suitable adjustment content of elements such as C, B, V, Zr and Ce, the new cast superalloy that obtains by existing smelting, casting technique.
Evidence: C content is reduced to 0.10wt% by former alloy control composition 0.17wt%, can make that bulk carbide quantity reduces in the alloy, therefore descends at carbide and with probability that its body intersection cracks, and the cold and hot fatigue property of alloy is obviously improved; B content is reduced to 0.010wt% by former alloy control composition 0.017wt%, and the cold and hot fatigue property of alloy is improved, and the alloy initial melting temperature is significantly improved; Remove the V in the former alloy, do not reduce the alloy fundamental property, just can improve cold and hot fatigue property; Remove the Zr in the alloy, owing to reduced boundary's segregation of alloy significantly, thereby increase substantially the alloy initial melting temperature, can improve and reach 90 ℃; Add RE elements of Ce in the alloy, detrimental impurity such as S remaining in the alloy, O are obviously reduced, reduced their deleterious effect, can improve the alloy resistance of oxidation simultaneously, thereby not only improved the high temperature endurance performance of alloy, obviously improve cold and hot fatigue property simultaneously.But the rare earth residual volume can not be too high, otherwise harmful to performance.
Alloy of the present invention adopts vacuum induction furnace smelting mother alloy and cast sample and part.Casting technique is with the K417G alloy.
On former nickel-base alloy basis, the only suitable adjustment by micro-C, B, V, Zr and Ce, and developed a new alloy.It keeps the density of former alloy low, the intensity height in the time of outstanding advantage such as tissue is stable, makes the alloy initial melting temperature improve 85 ℃, cold and hot fatigue property has improved more than 70%, can satisfy the needs that the engine that higher use temperature and performance requriements are arranged is done blade material.
Below by embodiment in detail the present invention is described in detail.
Embodiment
1. alloying constituent (wt%)
Surplus the C B Zr V Ce Co Cr Mo Al Ti Ni 0.088 0.010 00 0.005 10.08 9.04 3.02 5.68 4.42
2. alloy preparation
Above-mentioned alloying constituent K417G alloy smelting technology is routinely smelted and casting.
3. performance
900 ℃ of stretching: σ
b691MPa, σ
0.2524MPa, δ 7.6%, and ψ 18.8%
900 ℃ of 314MPa are lasting: rupture time 138.5 hours, extend 5.2%
760 ℃ of 647MPa are lasting: rupture time 129 hours, extend 7.0%
Initial melting temperature: 1255 ℃
Cold and hot fatigue: 38.0 times
Density: 7.85g/cm
3
Comparative example
1. alloying constituent (wt%)
C B Zr V Ce Co Cr Mo Al Ti Ni
0.17 surplus in the of 0.018 0.081 0.73 0 10.08 9.04 3.02 5.68 4.42
2. alloy preparation
The same embodiment.
3. performance
900 ℃ of stretching: σ
b700MPa, σ
0.2563MPa, δ 8.2%, and ψ 13.6%
900 ℃ of 314MPa are lasting: rupture time 83 hours, extend 6.6%
760 ℃ of 647MPa are lasting: rupture time 155 hours, extend 6.4%
Initial melting temperature: 1170 ℃
Cold and hot fatigue: 21.3 times
Density: 7.85g/cm
3
With inventive embodiments more as can be seen, the invention alloy is when keeping former alloy low density, high tensile strength and enduring quality, initial melting temperature has improved 85 ℃, and cold and hot fatigue property improves more than 70%, can be used in more advanced engine and be used as blade material.
Claims (2)
1. a cast nickel-base alloy is characterized in that: alloying constituent following (wt%)
C B Ce Co Cr
0.07～0.13 0.007～0.012 0.002～0.02 9.0～11.0 8.5～9.5
Mo Al Ti Ni
2.5 surplus in the of～3.5 4.8～5.7 4.1～4.7
Foreign matter content: S≤0.01 wherein, P≤0.01, Si≤0.2, Pb≤0.0005, Bi≤0.0001, Mn≤0.2, Fe≤0.5.
2. according to the described cast nickel-base alloy of claim 1, it is characterized in that:
C B Ce Co Co Mo Al Ti Ni
0.10 surplus in the of 0.01 0.005 10.0 9.0 3.0 5.5 4.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98121097A CN1086208C (en) | 1998-12-18 | 1998-12-18 | High-temp Ni-based cast alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98121097A CN1086208C (en) | 1998-12-18 | 1998-12-18 | High-temp Ni-based cast alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1257936A true CN1257936A (en) | 2000-06-28 |
| CN1086208C CN1086208C (en) | 2002-06-12 |
Family
ID=5227009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98121097A Expired - Fee Related CN1086208C (en) | 1998-12-18 | 1998-12-18 | High-temp Ni-based cast alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1086208C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103890318A (en) * | 2011-11-15 | 2014-06-25 | 博格华纳公司 | Flow rotor, in particular turbine wheel |
| CN104630565A (en) * | 2015-02-06 | 2015-05-20 | 重庆材料研究院有限公司 | High-strength and high-plasticity Ni-Cr-Co based turbine disc blade material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030578C (en) * | 1992-06-11 | 1995-12-27 | 冶金工业部钢铁研究总院 | Nickel-based high temp. casting alloy |
-
1998
- 1998-12-18 CN CN98121097A patent/CN1086208C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103890318A (en) * | 2011-11-15 | 2014-06-25 | 博格华纳公司 | Flow rotor, in particular turbine wheel |
| CN104630565A (en) * | 2015-02-06 | 2015-05-20 | 重庆材料研究院有限公司 | High-strength and high-plasticity Ni-Cr-Co based turbine disc blade material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1086208C (en) | 2002-06-12 |
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