CN1030578C - Nickel-based high temp. casting alloy - Google Patents
Nickel-based high temp. casting alloy Download PDFInfo
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- CN1030578C CN1030578C CN 92104346 CN92104346A CN1030578C CN 1030578 C CN1030578 C CN 1030578C CN 92104346 CN92104346 CN 92104346 CN 92104346 A CN92104346 A CN 92104346A CN 1030578 C CN1030578 C CN 1030578C
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- turning vane
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Abstract
The present invention relates to a nickel-base cast super-alloy which comprises the chemical components of 13.0 to 14.8 wt% of Cr, 7.5 to 8.8 wt% of Co, 6.3 to 7.4 wt% of Mo, B0.005 to 0.016 wt% of B, al 3.9 to 4.4 wt% of Al, 10 to 0.18 wt% of Co, 3.3 to 3.8 wt% of Ti, 0.005 to 0.03 wt% of Ce and Ni as the rest. The present invention has better thermal shock resistance, anti-oxidation corrosion performance and excellent plastic ductility and enduring quality at room temperature. The present invention is suitable for guide blades, guides, etc. of aircraft engines.
Description
The invention belongs to the nickel-base alloy field.Be mainly used in the turning vane of aircraft engine etc.
Turning vane or block cast guide material are born the thermal shocking and the oxidation corrosion effect of high-temperature fuel gas in gas turbine, and improving constantly along with aero-engine performance, the gas turbine turning vane requires the use temperature of its material more and more high, and require more and more long work-ing life.Therefore, employed superalloy not only requires the hot strength height, and requires heat shock resistance and antioxidant anticorrosive performance good.Cobalt-based and nickel base superalloy that the present turning vane that uses is used all can not satisfy this requirement.
The described C1023 nickel base superalloy of English Patent GB955016 is a kind of turning vane material, but because solution strengthening constituent contents such as Cr, Co, Mo are too high in the composition design, B content is low excessively, make the plasticity and toughness of room temperature relatively poor, persistence difference and thermal shock resistance are not high, alloy is at high temperature separated out excessive T.C.P phase behind the life-time service, should not be as the long lifetime turning vane of high temperature use.
Three patents of US4140555, US3850624 and CN86108748A are the nickel-base cast superalloy that adds magnesium or add calcium, owing on composition, do not consider the work characteristics of turning vane, promptly there is not enough to consider the performance of antioxidant anticorrosive and heat shock resistance aspect, cause the requirement that to satisfy this respect, thereby also be not suitable for the turning vane of high-temperature long-life life.In addition, nickel-base cast superalloy is melting and casting forming under vacuum all, and pure magnesium is difficult to join in the alloy melt, so must make the Ni-Mg master alloy earlier.And charge into the rare gas element of certain pressure, make complicated operation, difficulty.
The object of the present invention is to provide that a kind of ductility and toughness at room temperature is good, high temperature endurance performance is high and antioxidant anticorrosive and cold-and-heat resistent fatigue property good, be applicable to the nickel-base cast superalloy of high performance and long service life aircraft engine turning vane or guider etc.
Based on above-mentioned purpose, and consider that the working stress that turning vane bears is little, so r ' strengthening phase content is 45%(weight) about be advisable, simultaneously in order to improve the antioxidant anticorrosive performance, except that Cr, Ti, also added a certain amount of rare-earth element cerium Ce,, also added The addition of C o, Mo etc. in order to keep an amount of room temperature and hot strength.
The chemical ingredients of nickel-base cast superalloy of the present invention (weight %) is: Cr13.0～14.8%, Co7.5～8.8%, Mo6.3～7.4%, B0.005～0.016%; Al3.9～4.4%, C0.10～0.18%, Ti3.3～3.8%, Ce0.005～0.03%, surplus is Ni.
In the alloy, the effect of each element and the selection of content range thereof are presented below:
The main effect of Cr is the antioxidant anticorrosive performance that improves alloy.Cr＜13% o'clock, the antioxidant anticorrosive performance deficiency of alloy; Cr＞14.8% causes alloy to have becoming fragile tendency, and mechanical property descends, and T.C.P separates out too much mutually, so this alloy Cr content is 13.0～14.8%.
The Co solid solution in r mutually and r ' mutually, the solution strengthening effect is arranged, can improve r ' phase solid solubility temperature, and matrix r is stablized mutually, when Co＜7.5%, above-mentioned effect is relatively poor, Co＞8.8% o'clock is unhelpful to the plasticity and toughness of alloy, so Co content is advisable with 7.5～8.8%.
Mo is main solution strengthening element, and the intensity of alloy and enduring quality etc. are had bigger effect.When Mo＞7.4%, the plasticity and toughness of alloy descend, and cause the antioxidant anticorrosive mis-behave, have promoted the excessive of T.C.P phase to separate out, so the Mo that contains of alloy measures and is advisable with 6.2～7.4%.
B segregation in alloy and forms M in crystal boundary
3B
2, can strengthen crystal boundary, an amount of B can also improve the plasticity and the creep rupture strength of alloy.When B＜0.005%, little to the strengthening effect of alloy, and B＞0.016% o'clock, M
3B
2Mutually too much, easily cause hot tearing, so B content is advisable with 0.005～0.016%.
Rare earth element ce and O, S have higher avidity, can reduce O and S content in the alloy, and the Ce segregation can purify crystal boundary in crystal boundary, and makes carbide refinement, improve the plasticity and toughness and the high temperature endurance performance of alloy, and simultaneously, appropriate C e content can promote alloy surface Cr
2O
3The generation of fine and close protective membrane improves alloy antioxidant anticorrosive ability.The suitable add-on of Ce is 0.005～0.03% in this alloy.
Al is with Ti and forms r ' Ni mutually
3The element of (Al, Ti), involutory gold utensil has the precipitation strength effect, guarantees the hot strength and the enduring quality of alloy; In addition, Al plays antioxygenation to alloy; Ti then has heat resistanceheat resistant and anti-sulphur corrosion effect, and this alloy is for guaranteeing enough intensity and enduring quality, and the Al amount is controlled at 3.9～4.4%, and the Ti amount is controlled at 3.4～4.4%.
In order to reduce being mingled with of alloy, guarantee the good plasticity and toughness of alloy, the control of the content of all the other elements is as follows in the alloy: Si＜0.2%, Mn＜0.4%, Fe＜0.5%, S＜0.01%, P＜0.01%.
The present invention can the different smelting furnaces under vacuum in melting, be cast into blanks such as required turning vane and guider.
Compared with prior art, the present invention has thermal shock resistance (as shown in table 1) and antioxidant anticorrosive performance (as shown in table 2) preferably.In addition, the present invention also has good ductility and toughness at room temperature and enduring quality.δ 5＞7% under the room temperature, impelling strength Ak＞2.6kg-m/cm
2; Under 900 ℃ and the 20kg load, creep rupture life＞520 hour.
In addition, the casting forming function of alloy of the present invention and good welding performance can satisfy turning vane complex-shaped, that the wall thickness difference is big, and particularly the cast form of block cast guider and blade are reprocessed the requirement of soldering.
The thermal shock resistance of table 1 alloy of the present invention
Temperature (℃) cycle index (N)
20＝850 120-144
20＝900 57-59
The antioxidant anticorrosive performance of table 2 alloy of the present invention
Temperature-time oxidation concentration
(℃) (hour) gram/rice
2Hour
1000 100 0.086
Embodiment
The chemical ingredients scope of alloy according to the present invention, in vacuum induction furnace melting four stove alloys, and the four batches of turning vanes of under vacuum, having cast.Meanwhile, the coupon of drawability and the enduring quality test usefulness of also having cast, the test plate (panel) that thermal shock test is used.Four stove alloy at room temperature tensile properties, impelling strength and enduring quality have been tested.The chemical ingredients of four stove alloys is as shown in table 3, and The performance test results is as shown in table 4.
The chemical ingredients (weight %) of table 3 embodiment alloy
Element Cr Co Mo Al Ti C B Ce Ni
Heat (batch) number
Surplus in the of 1 14.76 8.73 7.36 4.20 3.56 0.12 0.009 0.005
Surplus in the of 2 14.09 6.80 4.02 4.02 3.59 0.13 0.012 0.01
Surplus in the of 3 13.55 7.20 3.97 3.97 3.60 0.11 0.015 0.02
Surplus in the of 4 14.0 6.50 4.20 4.20 3.60 0.16 0.010 0.02
The performance of table 4 embodiment alloy
Furnace chamber temperature tensile property impelling strength h creep rupture life
σb σ0.2 δ5 Ak 900℃ 850℃
Number MPa MPa % kg-m/cm
220kg 32kg
1 1029 / 7.2 3.18 529 /
2 1045 835 10.2 3.54 621 /
3 1040 360 8.4 2.64 / 291
4 1050 827 9.6 4.1 / 263
Claims (2)
1, a kind of nickel-base cast superalloy is characterized in that chemical ingredients (weight %) is: Cr13.0～14.8%, Co7.5～8.8%, Mo6.3～7.4%, B0.005～0.016%, A13.9～4.4%, Co10～0.18%, Ti3.3～3.8%, Ce0.005～0.03%, surplus is Ni.
2, alloy according to claim 1 is characterized in that the controlled contents (weight %) of all the other elements is: Si＜0.2%, Mn＜0.4%, Fe＜0.5%, S＜0.01%, P＜0.01%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92104346 CN1030578C (en) | 1992-06-11 | 1992-06-11 | Nickel-based high temp. casting alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92104346 CN1030578C (en) | 1992-06-11 | 1992-06-11 | Nickel-based high temp. casting alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1066298A CN1066298A (en) | 1992-11-18 |
| CN1030578C true CN1030578C (en) | 1995-12-27 |
Family
ID=4940760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92104346 Expired - Fee Related CN1030578C (en) | 1992-06-11 | 1992-06-11 | Nickel-based high temp. casting alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030578C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086208C (en) * | 1998-12-18 | 2002-06-12 | 中国科学院金属研究所 | High-temp Ni-based cast alloy |
| JP3916484B2 (en) * | 2002-03-05 | 2007-05-16 | 独立行政法人科学技術振興機構 | Ni alloy heat resistant material excellent in high temperature oxidation resistance and method for producing the same |
| JP4835771B1 (en) * | 2010-06-14 | 2011-12-14 | 住友金属工業株式会社 | Welding material for Ni-base heat-resistant alloy, weld metal and welded joint using the same |
| CN103184896B (en) * | 2011-12-27 | 2015-12-16 | 中航商用航空发动机有限责任公司 | A kind of turborotor |
| CN110735067B (en) * | 2019-11-28 | 2021-05-25 | 中国科学院金属研究所 | Purification smelting process of nickel-based high-temperature alloy rich in active elements |
-
1992
- 1992-06-11 CN CN 92104346 patent/CN1030578C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1066298A (en) | 1992-11-18 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| ASS | Succession or assignment of patent right |
Owner name: BEIJING IRON AND STEEL GAONA TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: GENERAL RESEARCH INST. OF IRON AND STEEL, MINISTRY OF METALLURGICAL INDUSTRY Effective date: 20031218 |
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Effective date of registration: 20031218 Address after: 100081 No. 76 South College Road, Beijing, Haidian District Patentee after: Beijing steel Gaona technology limited liability company Address before: 100081 No. 76 South College Road, Beijing, Haidian District Patentee before: Iron and Steel Central Research Institute of Ministry of Metallurgical Industry |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19951227 |