CN103436739B - A kind of rhenium-containing High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy - Google Patents
A kind of rhenium-containing High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy Download PDFInfo
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- CN103436739B CN103436739B CN201310334251.9A CN201310334251A CN103436739B CN 103436739 B CN103436739 B CN 103436739B CN 201310334251 A CN201310334251 A CN 201310334251A CN 103436739 B CN103436739 B CN 103436739B
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 62
- 239000000956 alloy Substances 0.000 title claims abstract description 62
- 229910052702 rhenium Inorganic materials 0.000 title claims abstract description 14
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims description 26
- 239000012535 impurity Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 24
- 230000007797 corrosion Effects 0.000 abstract description 22
- 229910000601 superalloy Inorganic materials 0.000 description 16
- 239000000126 substance Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 238000005530 etching Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- BKUKXOMYGPYFJJ-UHFFFAOYSA-N 2-ethylsulfanyl-1h-benzimidazole;hydrobromide Chemical compound Br.C1=CC=C2NC(SCC)=NC2=C1 BKUKXOMYGPYFJJ-UHFFFAOYSA-N 0.000 description 1
- 229910000691 Re alloy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 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
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention provides a kind of rhenium-containing High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy, the moiety of this alloy is formed and the mass percentage of each composition is: Cr:8.0 ~ 12.0%, Co:8.0 ~ 12.0%, Mo:0.5 ~ 3.0%, W:3.0 ~ 6.0%, Ta:4.0 ~ 8.0%, Al:3.0 ~ 5.0%, Ti:3.0 ~ 5.0%, Re:1.0 ~ 3.0%, C:0 ~ 0.4%, all the other are Ni, 6.5≤Al+Ti≤9, Al/Ti≤1.This alloy not only has excellent hot corrosion resistance, also has higher mechanical behavior under high temperature, good structure stability.Both go for ground and naval gas turbine high-temperature component, go for again space flight, high-temperature unit of aircraft engine.
Description
Technical field
The invention belongs to nickel-base high-temperature single crystal alloy technical field, be specifically related to a kind of strength nickel-base single crystal super alloy of the component being mainly applicable to bear higher stress under High Temperature Hot-corrosion Behaviorof condition.
Background technology
Carrier-borne aircraft under ocean environment, the development of the sciemtifec and technical spheres such as ground gas turbine, requires that engine material is with good mechanical property and excellent corrosion and heat resistant ability.Along with the raising of engine and burning machine inlet temperature, not only require the hot corrosion resistance that alloy keeps excellent, its mechanical property is had higher requirement simultaneously.The corrosion and heat resistant nickel-base high-temperature single crystal alloy of current China development mainly contains DD8, DD10 and DD413 etc., and these alloys have good hot corrosion resistance, but intensity does not far reach the level of domestic and international the second generation single crystal superalloy.Therefore, the corrosion and heat resistant single crystal alloy kind at home at present with high strength is less.
For above-mentioned background, people expect to obtain a kind of corrosion and heat resistant nickel-base high-temperature single crystal alloy, while there is good hot corrosion resistance, the high strength s-generation corrosion and heat resistant single crystal super alloy that the mechanical property such as lasting is suitable with the high-strength single crystal alloy of the typical s-generation.
Summary of the invention
The object of this invention is to provide a kind of rhenium-containing High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy, this alloy, while acquisition with the suitable mechanical property of the high-strength single crystal super alloy of the typical s-generation, has good hot corrosion resistance.
The invention provides a kind of rhenium-containing High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy, the moiety of described alloy is formed and the mass percentage of each composition meets following requirement:
Cr:8.0 ~ 12.0%, Co:8.0 ~ 12.0%, Mo:0.5 ~ 3.0%, W:3.0 ~ 6.0%, Ta:4.0 ~ 8.0%, Al:3.0 ~ 5.0%, Ti:3.0 ~ 5.0%, Re:1.0 ~ 3.0%, C:0 ~ 0.4%, all the other are Ni, 6.5≤Al+Ti≤9, Al/Ti≤1.
High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy provided by the invention, the moiety of described alloy is formed and the mass percentage of each composition meets following requirement:
Cr:9.0 ~ 11.0%, Co:9.0 ~ 11.0%, Mo:1.0 ~ 2.0%, W:3.5 ~ 5.5%, Ta:5.0 ~ 7.0%, Al:3.3 ~ 4.3%, Ti:3.6 ~ 4.6%, Re:1.5 ~ 2.5%, C:0 ~ 0.2%, all the other are Ni, 6.9≤Al+Ti≤8.9, Al/Ti≤1.
High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy provided by the invention, in described nickel-base high-temperature single crystal alloy, the composition of impurity and mass percentage meet following requirement: O≤0.003, N≤0.002, S≤0.004, P≤0.018, Si≤0.2, Pb≤0.0005, Bi≤0.00005.
The chemical composition design of alloy of the present invention (alloy designations is named as DD420) is mainly based on following reason:
Alloying constituent is the key factor affecting thermal etching, can promote that alloy surface stablizes the formation of oxide film, falling low-alloyed thermal etching speed by adding alloying element.In superalloy, Cr improves the most effective alloying element of Alloy Anti hot corrosion resistance, and certain Cr content can form corrosion and heat resistant Cr2O3 protective membrane.But the precipitation of topological solid matter phase (TCP) can be caused in alloy during Cr too high levels.So Cr content is 8.0 ~ 12.0% in corrosion-resistant superalloy.
Co has restraining effect to TCP phase, expand heat treatment window, but too high Co content can reduce solid solubility temperature, causes the reduction of alloy high-temp performance, and for ensureing the high-temperature behavior of alloy, Co content controls 8.0 ~ 12.0%.
Mo, W are most important solution strengthening element in superalloy, but they are all promote TCP phase forming element, and the structure stability for alloy is very unfavorable.And W, Mo are under high-temperature oxidation environment, very easily generate volatile oxide compound, difficulty or ease form fine and close oxide film, are having Na
2sO
4environment in, easily cause acid frit reaction, produce serious thermal etching, particularly the alloy of high Mo, normal catastrophic corrosion occurs.Therefore, the content limiting Mo, W is less than 3.0% and 6.0% respectively.
Al, Ti, Ta are topmost precipitation strength γ ' phase forming elements in superalloy.Ti also helps and carries heavy alloyed hot corrosion resistance, and Al can significantly improve the antioxidant property of alloy, but liquid towards Na
2sO
4barrier propterty extreme difference, so the Ti/Al ratio of alloy is greater than 1, and 6.5≤Al+Ti≤9.Ta is except effectively putting forward heavy alloyed heat resistance, can also increase the antioxidant property of alloy, corrosion resistance nature and castability, but Ta is too high, in alloy, eutectic content is high simultaneously, the thermal treatment of alloy is made to become very difficulty, in conjunction with these factors the present invention control Ta content 4.0 ~ 8.0%.
Re is effective solution strengthening element in superalloy, can reduce the Elements Diffusion speed in high temperature creep, lasting process, significantly improve the mechanical property of alloy.Meanwhile, the hot corrosion resistance of Re alloy is useful.But Re forms volatile oxide compound in oxidising process, the integrity of infringement oxide film, worsens antioxidant property.In addition, excessive Re also can promote that TCP phase is separated out.Therefore, the content of Re is controlled 1.0 ~ 3.0%.
Adding of the addition of C can put forward heavy alloyed castability, falls and generates small sized particles shape carbide and can strengthen crystal boundary adding of low-alloyed recrystallize tendency, particularly C, thus improve the low angle boundary tolerance limit of single crystal alloy, and then put forward heavy alloyed yield rate.But excessive C adds the performance that membership reduces alloy, therefore, controls C content at 0-0.4%.
Nickel-base high-temperature single crystal alloy of the present invention utilizes the melting in vacuum induction furnace of the elements such as pure Ni, Co, Cr, W, Mo, Ta, Ti, Al, Re, C, and pour into the satisfactory mother alloy of chemical composition, and then by apparatus for directional solidification (high speed freezing method or liquid metal method of cooling) remelting, utilize spiral crystal selector or young crystallization directional freeze to become monocrystalline coupon.Need through Overheating Treatment before using.
For prior art background, the present invention has developed a kind of rhenium-containing High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy, and its hot corrosion resistance and M38 alloy phase are worked as, and mechanical property has met or exceeded the high-strength single crystal super alloy level of the typical s-generation.
Advantage of the present invention and beneficial effect are described as follows:
(1) compared with other nickel-base high-temperature single crystal alloy existing, alloy of the present invention has excellent hot corrosion resistance, and 900 DEG C of thermal etching abilities are suitable with M38.
(2) enduring quality of alloy of the present invention and typical the second generation single crystal superalloy quite even more excellent, 982 DEG C/248MPa >200h lower creep rupture life, 1000 DEG C/235MPa >100h lower creep rupture life is high-strength corrosion and heat resistant single crystal super alloy.
(3) alloy of the present invention is at 900 DEG C of Long-term Aging tissue stabilization.
Accompanying drawing explanation
Fig. 1 is the Larson-Miller curve comparison diagram of first-generation single crystal super alloy PWA1483 and the second generation single crystal superalloy Re ń eN5 in alloy of the present invention and prior art;
Fig. 2 is the test of alloy of the present invention 900 ° of C hot corrosion resistances;
Fig. 3 is microstructure after alloy of the present invention 900 ° of C Long-term Aging 2000h.
Embodiment
Following examples will be further described the present invention, but not thereby limiting the invention.
Concrete preparation method requires: adopt vacuum induction melting, first pour into the satisfactory mother alloy of chemical composition, and then prepare monocrystalline coupon, must through Overheating Treatment before using.
Embodiment 1-3:
The chemical composition of nickel-base high-temperature single crystal alloy sample of the present invention is all see table 1.Conveniently contrast,
Also the chemical composition of typical first-generation nickel-base high-temperature single crystal alloy PWA1483 and typical the second generation single crystal superalloy Re ń eN5 is listed in table 1.
Chemical composition composition list (wt.%) of table 1 alloy of the present invention (embodiment 1-8) and PWA1483, Re ń eN5
| Alloy | Cr | Co | W | Mo | Ta | Al | Ti | Re | C | Ni |
| Embodiment 1 | 9.2 | 9 | 4 | 2 | 5.7 | 3.4 | 4.2 | 2.1 | 0.04 | More than |
| Embodiment 2 | 10 | 9 | 3.9 | 1.9 | 5.3 | 3.3 | 4 | 2 | 0.02 | More than |
| Embodiment 3 | 10.2 | 9 | 4 | 1.5 | 5 | 3.2 | 4 | 1.9 | 0.03 | More than |
| PWA1483 | 12.0 | 9 | 4 | 1.9 | 5 | 3.4 | 4 | - | 0.06 | More than |
| Reńe N5 | 7 | 8 | 5.0 | 2 | 7 | 6.2 | - | 3 | - | More than |
Note: in table, " remaining " implication on Ni content one hurdle is " surplus ".
Embodiment 4:
The Larson-Miller curve of the embodiment of the present invention 1 alloy and typical first-generation nickel-base high-temperature single crystal alloy PWA1483 and typical the second generation single crystal superalloy Re ń eN5 compares sees Fig. 1.The enduring quality of alloy of the present invention is suitable with Re ń eN5, higher than PWA1483.
Embodiment 5:
900 ° of C hot corrosion resistances of the 2-in-1 gold of the embodiment of the present invention are shown in Fig. 2 with comparing of hot-corrosion-resistant alloy M38.
Embodiment 6:
After the complete thermal treatment of alloy, carry out 900 ° of C Long-term Aging experiments, after Long-term Aging 2000h, do not have TCP phase to separate out.After the 2-in-1 golden Long-term Aging of the embodiment of the present invention, tissue is shown in Fig. 3.
Claims (3)
1. a rhenium-containing High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy, is characterized in that: the moiety of described alloy is formed and the mass percentage of each composition meets following requirement:
Cr:8.0 ~ 12.0%, Co:8.0 ~ 12.0%, Mo:0.5 ~ 2.0%, W:3.0 ~ 6.0%, Ta:4.0 ~ 5.7%, Al:3.0 ~ 5.0%, Ti:3.0 ~ 5.0%, Re:1.0 ~ 3.0%, C:0 ~ 0.4%, all the other are Ni, 6.5≤Al+Ti≤9, Al/Ti≤1.
2. according to rhenium-containing High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy according to claim 1, it is characterized in that, the moiety of described alloy is formed and the mass percentage of each composition meets following requirement:
Cr:9.0 ~ 11.0%, Co:9.0 ~ 11.0%, Mo:1.0 ~ 2.0%, W:3.5 ~ 5.5%, Ta:5.0 ~ 5.7%, Al:3.3 ~ 4.3%, Ti:3.6 ~ 4.6%, Re:1.5 ~ 2.5%, C:0 ~ 0.2%, all the other are Ni, 6.9≤Al+Ti≤8.9, Al/Ti≤1.
3. according to the High-strength hot-corrosion-resistnickel-base nickel-base monocrystal high-temperature alloy described in claim 1 or 2, it is characterized in that: in described nickel-base high-temperature single crystal alloy, the composition of impurity and mass percentage meet following requirement: O≤0.003, N≤0.002, S≤0.004, P≤0.018, Si≤0.2, Pb≤0.0005, Bi≤0.00005.
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| CN108913952A (en) * | 2018-07-27 | 2018-11-30 | 南京工程学院 | A kind of high temperature alloy and preparation method thereof |
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| CN103966671A (en) * | 2014-03-31 | 2014-08-06 | 中国科学院金属研究所 | High-strength hot-corrosion-resistant Ni-based single crystal superalloy and preparation method |
| CN103952595A (en) * | 2014-05-15 | 2014-07-30 | 中国人民解放军第五七一九工厂 | Laser-cladding powder for repairing directional solidified nickel-based high-temperature alloy blade |
| GB2536940A (en) | 2015-04-01 | 2016-10-05 | Isis Innovation | A nickel-based alloy |
| ITUA20161551A1 (en) * | 2016-03-10 | 2017-09-10 | Nuovo Pignone Tecnologie Srl | LEAGUE HAVING HIGH RESISTANCE TO OXIDATION AND APPLICATIONS OF GAS TURBINES THAT USE IT |
| CN109136654A (en) * | 2017-06-19 | 2019-01-04 | 中国科学院金属研究所 | A kind of low rhenium corrosion and heat resistant long-life high intensity second generation nickel-base high-temperature single crystal alloy and its heat treatment process |
| CN109371288A (en) * | 2018-09-30 | 2019-02-22 | 东方电气集团东方汽轮机有限公司 | The nickel-base high-temperature single crystal alloy and its manufacturing method of low rhenium, high-intensitive corrosion and heat resistant |
| CN112176224A (en) * | 2020-09-08 | 2021-01-05 | 中国科学院金属研究所 | High-strength nickel-based single crystal superalloy with excellent comprehensive performance |
| CN113265563B (en) * | 2021-05-06 | 2022-04-29 | 中国联合重型燃气轮机技术有限公司 | Ni high-temperature alloy with good heat corrosion resistance and preparation method thereof |
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