CN106198605A - The method of evaluating performance of single crystal super alloy under a kind of special environment - Google Patents
The method of evaluating performance of single crystal super alloy under a kind of special environment Download PDFInfo
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- CN106198605A CN106198605A CN201610638797.7A CN201610638797A CN106198605A CN 106198605 A CN106198605 A CN 106198605A CN 201610638797 A CN201610638797 A CN 201610638797A CN 106198605 A CN106198605 A CN 106198605A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention discloses the method for evaluating performance of single crystal super alloy under a kind of special environment, belong to technical field of high temperature alloy.The method uses the method filling special gas in heat-resistant glass tube, manufactures the environment such as nitrogen, ammonia, is placed in one by the single crystal super alloy processed, is then placed in high temperature furnace by whole device and carries out heat treatment, cool down in atmosphere.By the performance of alloy after common universal tensile testing machine test processes.Use this method success evaluation nickel-base high-temperature single crystal alloy microstructure and impact of tensile property under high temperature nitrogen, ammonia environment, and effectively prevent the special equipment processing charges of cost intensive.Method is simply effective, is suitable to evaluate the special environment impact on material property.
Description
Technical field:
The present invention relates to technical field of high temperature alloy, be specifically related to the performance of single crystal super alloy under a kind of special environment and comment
Valency method.
Background technology:
It is known that single crystal super alloy is class advanced person's cast superalloy, the more common equiax crystal of its elevated temperature strength closes
Gold is significantly increased, and is currently advanced Aeronautics and Astronautics, the preferred material of enegy source engine hot-end component.Along with monocrystalline high temperature closes
The extensive application of gold, has the performance under many special environments increasingly to receive publicity, and the most this kind of material is at high temperature nitrogen, ammonia
Serviceability in environment.But, due at present both at home and abroad for performance study less of the material under this kind of special environment,
Relevant experimental data substantially belongs to blank, therefore when designing corresponding parts, substantially without data available reference.The opposing party
Face, does not has the method for maturation can accurately test single crystal super alloy performance under special environment in the market, does not has molding yet
Special equipment carries out this type of experiment.Therefore, need a kind of method of invention badly, the performance of single crystal super alloy under special environment is carried out
Accurate Determining, and then provide foundation for reliability evaluation that it is worked in particular circumstances.
Summary of the invention:
In order to solve the problem of the single crystal alloy performance evaluation lacking effective means at present to working under special environment, this
The method of evaluating performance of single crystal super alloy under a kind of special environment of bright offer, employing the method can be with accurate simulation high temperature bar
Under part, nitrogen or ammonia environment, the use state of single crystal super alloy part, it is possible to the material after atmosphere, heat etc. are acted on
Performance test and evaluate.
The technical scheme is that
The method of evaluating performance of single crystal super alloy under a kind of special environment, the method is to be put by single crystal super alloy sample
It is placed in cylindrical glass tube, after extracting glass inner air tube out, nitrogen and/or ammonia is charged in glass tubing, then closes glass
The two ends of glass pipe；Glass tubing after closing be placed in high temperature Muffle furnace be heated to temperature required after, be incubated 10-50h, take out glass
Glass pipe is also cooled to room temperature, after taking out sample, it is carried out performance test and evaluation from glass tubing.
Described special environment refers under nitrogen, ammonia and/or hot conditions, wherein: in glass tubing nitrogen pressure be 0～
0.02MPa, ammonia pressure is 0～0.02MPa, and glass tube heating temperature range is 0～1500 DEG C.
Described glass tubing is heat-resistant glass tube, and material is preferably quartz glass；Glass tubing length 100-200mm.
Described alloy is nickel-base high-temperature single crystal alloy.
Described cylindrical glass tube is double-decker, is filled with same in interlayer interior (between internal layer and outer layer) and inner layer glass tube
Sample kind and the gas of pressure.The diameter of inner pipe of double-decker glass tubing is 10-12mm, and outer tube diameter is 13-118mm, inner tube
It is 0.2-0.8mm with the pipe thickness of outer tube.
The invention has the beneficial effects as follows:
The present invention is directed to single crystal high-temperature alloy material, use simulation means to realize the use condition such as specific environment, temperature, for
The single crystal super alloy performance level used in the environment such as accurate evaluation nitrogen, ammonia provides hands simple, convenient, direct
Section.
Accompanying drawing illustrates:
Fig. 1 is ammonia environment sample structure figure；Wherein: before (a) ammonia processes；B () ammonia processes after.
Fig. 2 is that ammoniated gas disposal and non-nitrogen charging process sample strength and plasticity；Wherein: (a) intensity；(b) plasticity.
Fig. 3 is nitrogen environment sample structure figure；Wherein: before (a) nitrogen treatment；After (b) nitrogen treatment.
Fig. 4 is nitrogen environment properties of sample test result；Wherein: (a) intensity；(b) plasticity.
Detailed description of the invention:
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
The present invention is that nickel-base high-temperature single crystal alloy carries out method of evaluating performance in particular circumstances, and the method uses heat-resisting
Glass tubing, is encapsulated in wherein by sample after filling special environment gas (ammonia and/or nitrogen), is positioned over by packaged device
In high temperature furnace, carry out high-temperature process, can be with the tissue of high-temperature alloy material, performance change in accurate evaluation special atmosphere environment.
In following example, glass tubing used is double-deck cylindrical glass tube, and material is quartz glass, wherein interior
Managing a diameter of 10-12mm, outer tube diameter is 13-118mm, and the pipe thickness of inner and outer tubes is 0.2-0.8mm.
Embodiment 1
First single crystal super alloy (DD405 alloy) is processed into performance test sample, the performance test sample that will process
Product are positioned in the inner tube of glass tubing, after being extracted out by inner air tube, are filled with the ammonia of 0.02MPa pressure, then by glass tubing
Inner tube is closed, and glass tubing diameter of inner pipe is 13mm.
For preventing hot environment glass tubing from rupturing, use double-layer glass tube packing forms, by the most packaged glass
Pipe inner tube is positioned in the bigger glass tubing outer tube of diameter (diameter 15mm), after being extracted out by air in glass tubing interlayer, is re-filled with
The ammonia of 0.02MPa pressure, then by outer for glass tubing duct occlusion (such as Fig. 1).
Packaged sample is positioned in high temperature Muffle furnace, is warming up to 1000 DEG C, by glass after 1000 DEG C of insulation 30h
Pipe takes out, and takes out single crystal samples after cooling after being destroyed by glass tubing, uses universal tensile testing machine that sample is carried out performance test.
Test result 20 DEG C and 1100 DEG C shows, ammonia environment for the hot strength of DD405 alloy and plasticity without
Significantly affecting (such as Fig. 2), this explanation DD405 alloy can high-temperature stable work in ammonia environment.
Embodiment 2
First single crystal super alloy (DD405 alloy) is processed into performance test sample, the performance test sample that will process
Product are positioned in the inner tube of glass tubing, after being extracted out by inner air tube, are filled with the nitrogen of 0.02MPa pressure, then by glass tubing
Inner tube is closed, and glass tubing diameter of inner pipe is 13mm.
For preventing hot environment glass tubing from rupturing, use double-layer glass tube packing forms, by the most packaged glass
Pipe inner tube is positioned in the bigger glass tubing outer tube of diameter (diameter 15mm), after being extracted out by air in glass tubing interlayer, is re-filled with
The ammonia of 0.02MPa pressure, then by outer for glass tubing duct occlusion (such as Fig. 3).
Packaged sample is positioned in high temperature Muffle furnace, is warming up to 1000 DEG C, by glass after 1000 DEG C of insulation 30h
Pipe takes out, and takes out single crystal samples after cooling after being destroyed by glass tubing, uses universal tensile testing machine that sample is carried out performance test.
Test result 20 DEG C and 1100 DEG C shows, ammonia environment for the hot strength of DD405 alloy and plasticity without
Significantly affecting (such as Fig. 4), this explanation DD405 alloy can high-temperature stable work in ammonia environment.
Claims (6)
1. the method for evaluating performance of single crystal super alloy under a special environment, it is characterised in that: the method is by monocrystalline high temperature
Alloy sample is positioned in cylindrical glass tube, after extracting glass inner air tube out, nitrogen or ammonia is charged in glass tubing, then
The two ends of sealed glass tubes；Glass tubing after closing be placed in high temperature Muffle furnace be heated to temperature required after, be incubated 10-50h,
Take out glass tubing and be cooled to room temperature, after taking out sample from glass tubing, it being carried out performance test and evaluation.
The method of evaluating performance of single crystal super alloy under special environment the most according to claim 1, it is characterised in that: described
Special environment refers under nitrogen, ammonia and/or hot conditions, wherein: in glass tubing, nitrogen pressure is 0～0.02MPa, ammonia pressure
Power is 0～0.02MPa, and glass tube heating temperature range is 0～1500 DEG C.
The method of evaluating performance of single crystal super alloy under special environment the most according to claim 1 and 2, it is characterised in that:
Described glass tubing is heat-resistant glass tube, and material is quartz glass；Glass tubing length 100-200mm.
The method of evaluating performance of single crystal super alloy under special environment the most according to claim 1, it is characterised in that: described
Alloy is nickel-base high-temperature single crystal alloy.
The method of evaluating performance of single crystal super alloy under special environment the most according to claim 1, it is characterised in that: described
Cylindrical glass tube is double-decker, interior kind and the gas of pressure as being filled with in inner layer glass tube of interlayer.
The method of evaluating performance of single crystal super alloy under special environment the most according to claim 5, it is characterised in that: described
The diameter of inner pipe of glass tubing is 10-12mm, and outer tube diameter is 13-118mm, and the pipe thickness of inner and outer tubes is 0.2-0.8mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595828A (en) * | 2020-12-07 | 2021-04-02 | 中国科学院金属研究所 | Method for evaluating casting process performance of single crystal high-temperature alloy |
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| CN112595828A (en) * | 2020-12-07 | 2021-04-02 | 中国科学院金属研究所 | Method for evaluating casting process performance of single crystal high-temperature alloy |
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