CN110132826A - The test method of nickel-base high-temperature single crystal alloy hot corrosion resistance - Google Patents
The test method of nickel-base high-temperature single crystal alloy hot corrosion resistance Download PDFInfo
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Abstract
This disclosure relates to which a kind of test method of nickel-base high-temperature single crystal alloy hot corrosion resistance, belongs to heat erosion test field.The test method includes: to provide multiple nickel-base high-temperature single crystal alloy testpieces to be tested；Multiple and different salting liquids are provided, wherein one or more salting liquids include vanadium；The salt film of one layer of preset quality is deposited on each testpieces surface using each salting liquid, and heat erosion is carried out to each testpieces with salt film and is tested to obtain test data；According to the test data that heat erosion is tested, heat erosion rate constant is determined.On the one hand the disclosure supplements the salting liquid containing vanadium and carries out heat erosion test to testpieces, provide the experimental enviroment for being more bonded the practical Service Environment of high temperature alloy, improve the reliability of test；On the other hand, it is precisely controlled the salt film content on testpieces surface, to obtain accurate test data, is conducive to the quantitative analysis for carrying out hot corrosion resistance, improves the accuracy and repeatability of test.
Description
Technical field
This disclosure relates to which field is tested in heat erosion, in particular to a kind of nickel-base high-temperature single crystal alloy hot corrosion resistance
Test method.
Background technique
Nickel-base high-temperature single crystal alloy has excellent mechanical behavior under high temperature, anti-oxidant and corrosive nature, is widely used in navigating
The manufacture of empty or industrial engine turbo blade.In order to obtain superior croop property and good structure stability, a new generation
Reduce the addition that can produce protective oxide constituent content for Al (aluminium), Cr (chromium) etc. in high temperature alloy manufacture, makes
It obtains alloy and shows relatively poor anti-oxidant and heat and corrosion resistant performance under higher service temperature.
Heat erosion refers to a kind of accelerated oxidation phenomenon of Crystal Nickel-based Superalloy at high temperature.When single crystal alloy long-term work exists
When hot environment containing the combustion gas such as S (sulphur), V (vanadium) and saliferous, alloy surface can adhere to one layer and contain Na2SO4(sulfuric acid
Sodium), NaCl (sodium chloride), V2O5The deposition salt of (vanadic anhydride), these deposition salt can destroy the protective layer of alloy surface and draw
Play the heat erosion phenomenon of alloy.The heat erosion of alloy can accelerate the germinating of turbine blade surface crackle, extension, when the heat of alloy is rotten
When erosion is with creep, fatigue interaction, it will cause the failure of blade, substantially reduce the service life and reliability of turbo blade.
Therefore, it is urgent to provide a kind of heat erosion environment of practical Service Environment of fitting, to carry out heat erosion to nickel-base high-temperature single crystal alloy
Test.
It should be noted that information is only used for reinforcing the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The test method for being designed to provide a kind of nickel-base high-temperature single crystal alloy hot corrosion resistance of the disclosure, to be bonded
Heat erosion test is carried out to nickel-base high-temperature single crystal alloy in the heat erosion environment of practical Service Environment.
According to one aspect of the disclosure, a kind of test method of nickel-base high-temperature single crystal alloy hot corrosion resistance is provided, is wrapped
It includes:
Multiple nickel-base high-temperature single crystal alloy testpieces to be tested are provided；
Multiple and different salting liquids are provided, wherein one or more described salting liquids include vanadium；
The salt film of one layer of preset quality is deposited on each testpieces surface using each salting liquid, and to each with salt film
Testpieces carries out heat erosion and tests to obtain test data,
According to the test data that the heat erosion is tested, heat erosion rate constant is determined.
In a kind of exemplary embodiment of the disclosure, the multiple various salts include:
First salting liquid, including Na2SO4；
Second salting liquid, including Na2SO4And NaCl；
Third salting liquid, including Na2SO4, NaCl and V2O5。
In a kind of exemplary embodiment of the disclosure, in the third salting liquid, the V2O5Weight ratio be 1
~15%.
In a kind of exemplary embodiment of the disclosure, in the third salting liquid, the Na2SO4Weight ratio be
The weight ratio of 75%, the NaCl are 20%, the V2O5Weight ratio be 5%.
It is described to deposit one on each testpieces surface using each salting liquid in a kind of exemplary embodiment of the disclosure
The salt film of layer preset quality, and heat erosion test is carried out to obtain test data to the testpieces for respectively having salt film and includes:
Step 1, by each salting liquid even application to each testpieces surface, and the salt film of preset quality is formed；
Step 2, the testpieces for respectively having salt film is kept the temperature under preset temperature；
Step 3, after keeping the temperature preset duration, each testpieces is taken out and is obtained test data, the test data
Including each testpieces quality and surface area；
Step 4, step 1 is repeated to step 3 more times.
In a kind of exemplary embodiment of the disclosure, the salt content every square centimeter on the testpieces surface is 3mg,
The salt film of the preset quality is to be determined according to the surface area and salt content every square centimeter of each testpieces.
In a kind of exemplary embodiment of the disclosure, the preset temperature is between 600 DEG C -1200 DEG C.
In a kind of exemplary embodiment of the disclosure, the heat preservation total duration of each testpieces is in 100-300 hours
Between；The preset duration kept the temperature every time is between 10-50 hours.
In a kind of exemplary embodiment of the disclosure, the test data tested according to the heat erosion determines heat
Corrosion rate constant includes:
The weight gain of each testpieces of each heat erosion stage is determined according to each testpieces quality of each heat erosion stage, and
Each testpieces surface area before occurring in conjunction with each heat erosion stage determines that unit area of each testpieces in each heat erosion stage increases
Weight；
Using heating time as abscissa, is increased weight with the unit area of testpieces as ordinate, existed according to each testpieces
The unit area weight gain data in each heat erosion stage, draw heat erosion dynamic curve diagram；
According to heat erosion dynamics formula, each testpieces heat erosion kinetic curve is simulated, and determines each testpieces
Heat erosion rate constant.
In a kind of exemplary embodiment of the disclosure, the heat erosion dynamics formula is
△W2=Kp·t+C
Wherein △ W is the unit area weight gain after testpieces heat erosion, KpFor heat erosion rate constant, when t is heat erosion
Between, C is heat erosion kinetic constant.
As shown from the above technical solution, the disclosure provides a kind of test side of nickel-base high-temperature single crystal alloy hot corrosion resistance
Method, advantage and has the active effect that
On the one hand a kind of test method for nickel-base high-temperature single crystal alloy hot corrosion resistance that the disclosure provides supplements and contains
The salting liquid of vanadium carries out heat erosion test to testpieces, and Control experiment part comes into full contact with sky during heat erosion is tested
Gas provides the experimental enviroment for being more bonded the practical Service Environment of nickel-base high-temperature single crystal alloy, improves the reliability of test；Separately
On the one hand, the salt film that one layer of preset quality is deposited on testpieces surface, is precisely controlled the salt film content on testpieces surface, to obtain
Accurate test data is taken, the quantitative analysis for carrying out hot corrosion resistance is conducive to, improves the accuracy and repeatability of test.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure
Example, and together with specification for explaining the principles of this disclosure.It should be evident that the accompanying drawings in the following description is only the disclosure
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 schematically shows the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance in disclosure exemplary embodiment
Flow diagram；
Fig. 2 schematically shows the nickel-based monocrystal high temperature for the embodiment that the disclosure is provided according to step 3 in Fig. 1 and step 4
The flow diagram of the test method of alloy hot corrosion resistance；
Fig. 3 schematically shows in the disclosure exemplary embodiment nickel-based monocrystal high temperature under the salt film component of the first salting liquid
The practical heat erosion weight gain curve graph of alloy testpieces；
Fig. 4 schematically shows in the disclosure exemplary embodiment nickel-based monocrystal high temperature under the salt film component of the first salting liquid
The fitting heat erosion kinetic curve of alloy testpieces；
Fig. 5 schematically shows in the disclosure exemplary embodiment nickel-based monocrystal high temperature under the salt film component of the second salting liquid
The practical heat erosion weight gain curve of alloy testpieces；
Fig. 6 schematically shows in the disclosure exemplary embodiment nickel-based monocrystal high temperature under the salt film component of the second salting liquid
The fitting heat erosion kinetic curve of alloy testpieces；
Fig. 7 schematically shows in the disclosure exemplary embodiment nickel-based monocrystal high temperature under the salt film component of third salting liquid
The practical heat erosion weight gain curve of alloy testpieces；
Fig. 8 schematically shows in the disclosure exemplary embodiment nickel-based monocrystal high temperature under the salt film component of third salting liquid
The fitting heat erosion kinetic curve of alloy testpieces；
Fig. 9 schematically shows in the disclosure exemplary embodiment nickel-based monocrystal high temperature under the salt film component of three kinds of salting liquids
The fitting heat erosion dynamics comparison diagram of alloy testpieces；
Figure 10 shows the nickel-based monocrystal high temperature conjunction under the salt film component of the first salting liquid in disclosure exemplary embodiment
Golden testpieces is in 200 hours rear surface pattern optical microscopes of heat erosion；
Figure 11 shows the nickel-based monocrystal high temperature conjunction under the salt film component of the second salting liquid in disclosure exemplary embodiment
Golden testpieces is in 200 hours rear surface pattern optical microscopes of heat erosion；
Figure 12 shows the nickel-based monocrystal high temperature conjunction under the salt film component of third salting liquid in disclosure exemplary embodiment
Golden testpieces is in 200 hours rear surface pattern optical microscopes of heat erosion.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to example set forth herein；On the contrary, thesing embodiments are provided so that the disclosure will more
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, knot
Structure or characteristic can be incorporated in any suitable manner in one or more embodiments.In the following description, it provides perhaps
More details fully understand embodiment of the present disclosure to provide.It will be appreciated, however, by one skilled in the art that can
It is omitted with technical solution of the disclosure one or more in the specific detail, or others side can be used
Method, constituent element, device, step etc..In other cases, be not shown in detail or describe known solution to avoid a presumptuous guest usurps the role of the host and
So that all aspects of this disclosure thicken.
In this specification using term "one", " one ", "the" and " described " to indicate there are one or more elements/
Component part/etc.；Term " comprising " and " having " is to indicate the open meaning being included and refer in addition to listing
Element/component part/also may be present except waiting other element/component part/etc.；Term " first " and " second " etc. are only made
It is used for label, is not the quantity limitation to its object.
In the related technology, it mainly uses for the heat erosion test of alloy with NaCl, Na2SO4Two kinds of salt are applied as heat erosion
The crucible assay of salt environment.But with the addition of V impurity element in combustion gas, salt environment of the alloy under practical Service Environment
Become NaCl, Na2SO4、V2O5The combination of these three substances.Therefore, in NaCl and Na2SO4Heat erosion test under both salt
Research and the practical Service Environment of alloy produce difference.
In addition, the hot corrosion test method of common alloy has crucible assay, electrochemical test method and burner
Test method(s) etc..Wherein crucible assay, which refers to, immerses sample among the fused salt in crucible, and surveys by heat erosion temperature and time
Random sample quality, the quality for recycling salt and the method for measuring composition transfer.Under the experimental condition, alloy is in salt ring abundant
Under border, but the oxygen content for participating in test is less, and test result cannot really reflect the heat erosion of aero-engine hot-end component
Situation.Poor repeatability of the alloy under the hot corrosion test method.Electrochemical test method is similar with crucible assay, is made with sample
For working electrode, form electrolytic cell with reference electrode, auxiliary electrode, test corrosion current, polarization resistance change with time with
Reflect the corrosion rate of alloy.This method is not suitable for the corrosion measurement of solid salt, and test device is complicated, generally less to make
With.Burner test method(s), simulates the use environment of gas turbine and aero-engine, and test device is complicated, at high cost.
Fig. 1 schematically shows the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance in disclosure exemplary embodiment
Flow diagram.
A kind of test method for nickel-base high-temperature single crystal alloy hot corrosion resistance that the disclosure provides, advantage and good effect
It is:
The disclosure provide a kind of nickel-base high-temperature single crystal alloy hot corrosion resistance test method, this method may include as
Lower step: multiple nickel-base high-temperature single crystal alloy testpieces to be tested are provided；Multiple and different salting liquids are provided, one of them or it is more
A salting liquid includes vanadium；The salt film of one layer of preset quality is deposited on each testpieces surface using each salting liquid, and to having
Each testpieces of salt film carries out heat erosion and tests to obtain test data；According to the test data that heat erosion is tested, determine that heat is rotten
Lose rate constant.
On the one hand a kind of test method for nickel-base high-temperature single crystal alloy hot corrosion resistance that the disclosure provides supplements and contains
The salting liquid of vanadium carries out heat erosion test to testpieces, and Control experiment part comes into full contact with sky during heat erosion is tested
Gas provides the experimental enviroment for being more bonded the practical Service Environment of nickel-base high-temperature single crystal alloy, improves the reliability of test；Separately
On the one hand, the salt film that one layer of preset quality is deposited on testpieces surface, is precisely controlled the salt film content on testpieces surface, to obtain
Accurate test data is taken, the quantitative analysis for carrying out hot corrosion resistance is conducive to, improves the accuracy and repeatability of test.
In step 1, multiple nickel-base high-temperature single crystal alloy testpieces to be tested can be provided.Wherein, each testpieces
Shape can be three-dimensional polygon, such as cube shaped.Firstly the need of by pre-processing, after treatment measures each testpieces
And obtain each testpieces mass M1(mg) and surface area a1(cm2)。
Specifically, pre-processing may include: with each testpieces surface of sand paper polishing；Testpieces is cleaned, sample is removed
Surface and oil contaminant simultaneously uses hair dryer cold air drying.Then can be used vernier caliper (0~200mm of testing range, measuring accuracy ±
The actual size of sample 0.02mm) is measured, and calculates specimen surface product a1(cm2/ square centimeter)；Using assay balance (precision ±
The quality for 0.1mg) weighing each testpieces, is weighed as M1(mg/ milligrams).
In step 2, multiple and different salting liquids can be provided, wherein one or more salting liquids may include vanadium.
Since the salt film component in traditional experiment in the formation of testpieces surface is mainly by NaCl and Na2SO4Two kinds at being grouped as, this hair
It is bright to be based on that V is generated after impurity containing V in combustion gas2O5, provide at least one salting liquid containing vanadium.
For the ease of comparative analysis, distilled water, Na are used2SO4、NaCl、V2O5Three kinds of salting liquids are prepared, are respectively as follows:
First salting liquid may include Na2SO4, and Na2SO4Weight ratio be 100%.
Second salting liquid may include Na2SO4And NaCl, and Na2SO4Weight ratio can be for 75%, NaCl
Weight ratio be can be 25%；
Third salting liquid may include Na2SO4, NaCl and V2O5, and Na2SO4Weight ratio can be 75%,
The weight ratio of NaCl be can be 20%, V2O5Weight ratio can be 5%.
Wherein, about in salting liquid, Na2SO4, NaCl and V2O5Weight ratio, the disclosure do not do special limit herein
It is fixed, in other embodiments, Na can also be adjusted separately according to test demand2SO4, NaCl and V2O5Weight ratio, wherein
V2O5Weight ratio can be 1~15%.
Fig. 2 schematically shows the high according to the nickel-based monocrystal of step 3 in Fig. 1 and an embodiment of step 4 of disclosure offer
The flow diagram of the test method of temperature alloy hot corrosion resistance.
In the following, step 3 and step 4 are described in detail referring to Fig. 2.
In step 3, it can use each salting liquid and deposit the salt film of one layer of preset quality on each testpieces surface, and to band
There is each testpieces of salt film to carry out heat erosion to test to obtain test data.It can specifically include following steps:
Step 31, salt is precisely applied, and forms the salt film of preset quality.Specifically, prepared each salting liquid is packed into
In spray bottle, after each testpieces is preheated to 100 DEG C -120 DEG C in clean heating dish, it is divided into three groups and sample is uniformly sprayed respectively
Apply the first salting liquid, the second salting liquid, third salting liquid.Since the temperature of testpieces is higher during spraying salt, it is attached to
Moisture in the solution on testpieces surface can evaporate at any time, testpieces surface forming salt film immediately.
You need to add is that there are six facings for tool since testpieces is using cube shaped, it can be according to testpieces table
The area of each facing of salt content and testpieces every square centimeter in face, precomputes the salt film of each facing
Amount.For example, can be 3mg (milligram) with the salt content every square centimeter on design experiment part surface according to test requirements document.It is spraying
Weigh sample mass at any time in the process, five surfaces of even application sample and after reaching the salt film of preset quality overturn sample
And another surface of sample is sprayed, to form the salt film of preset quality.
Step 32, the testpieces for respectively having salt film is kept the temperature under preset temperature.In the heat erosion for carrying out testpieces
Before test, the corundum ceramic crucible of test can be placed in chamber type electric resistance furnace in advance and be dried up to constant weight, to avoid earthenware
The influence that crucible tests heat erosion.In order to enable all surface of testpieces both participates in heat erosion test, salt film can will be coated with
Testpieces inclination be put into the crucible of constant weight.It, can be equipped with examination in order to avoid the influence of other experimental factors such as temperature field
The different zones that the crucible of part is divided into three groups, and is orderly put into the same chamber type electric resistance furnace according to the case where salt film component are tested,
900 DEG C of test temperature of setting.In some embodiments, test temperature may be between 600 DEG C -1200 DEG C.
Step 33, it desalts and measures testpieces quality, size.After keeping the temperature preset duration, each testpieces is taken out
And testpieces quality and size are measured, the testpieces that test data may include each testpieces quality, is calculated according to size
Surface area.Specifically, after current generation heat preservation duration reaches preset duration, stop heating, it is cooling to resistance in-furnace temperature
Afterwards, total Test part is taken out.In order to remove testpieces salt film remained on surface, the testpieces of taking-up need to be impregnated 15 in boiling water
Minute or so, then after the cooling drying in ventilation, testpieces mass M after test is desalted2(mg) and surface area a2(cm2)。
According to test demand, the heat preservation total duration that each testpieces can be set was between 100-300h (hour)；Every time
The preset duration of heat preservation is between 10-50 hours.For example, in this exemplary embodiment, it is 200h that heat preservation total duration, which can be set,
(hour), can also be arranged High Temperature Hot-corrosion Behaviorof sample time be respectively 10h, 30h, 50h, 75h, 100h, 125h, 150h,
175h,200h.You need to add is that the heat erosion situation of testpieces can occur significantly to become in the incipient stage of heat erosion
Change, therefore for the situation of change of accurate capture assay part heat erosion incipient stage, can start to keep the temperature in testpieces
In the preceding 100h of time, the setting sampling frequencys more to the greatest extent, such as 5-8 times, shorten sampling interval time, such as 10-20h.
Step 34, step 31 is repeated to step 33 more times, until the heat erosion duration of testpieces reaches heat preservation total duration.
In step 4, the test data that can be tested according to heat erosion, determines heat erosion rate, so that it is determined that heat erosion
Rate constant.It can specifically include:
Step 41, heat erosion rate is calculated.Each testpieces quality measured according to each heat erosion stage, determines each heat erosion
The weight gain Δ M=(M of stage each testpieces2-M1) (mg), and combine each testpieces surface area a before the generation of each heat erosion stage1
(cm2), determine each testpieces in the unit area weight gain Δ W (g/cm in each heat erosion stage2):
Δ W=Δ M/a1(g/cm2) (1)
Further, the time Δ T (h) that can also be increased weight according to the unit area in the stage with stage experience, calculates
The heat erosion rate of testpieces, i.e. unit area rate of gain V (g/m2/ h):
V=Δ M/a/ Δ T (g/m2/h) (2)
Step 42, heat erosion rate constant is calculated.With heating time T (h) for abscissa, increased with the unit area of testpieces
Weight Δ W (g/cm2) it is ordinate, the unit area weight gain data according to each testpieces in each heat erosion stage, using Origin
Software on Drawing alloy with the heat erosion time unit area increase weight curve graph；It is exploratory quasi- and according to heat erosion dynamics formula
Each testpieces heat erosion kinetic curve is closed, and according to the coefficient R of matched curve2With 1 degree of closeness, judgment curves
It is fitted fine or not degree, selects the best heat erosion kinetic curve of alloy, and then calculate the heat erosion rate constant of alloy
Kp。
Wherein, heat erosion dynamics formula is
△W2=Kp·t+C (3)
Wherein △ W is the unit area weight gain after testpieces heat erosion, KpFor heat erosion rate constant, when t is heat erosion
Between, C is heat erosion kinetic constant.
In the following, being obtained using the test that the method that the disclosure provides carries out a nickel-base high-temperature single crystal alloy hot corrosion resistance
Test data, and test data is handled and analyzed according to step 4.
Fig. 3-Fig. 8 be shown respectively in one embodiment of the disclosure the first salting liquid, the second salting liquid, third salting liquid salt
The practical heat erosion weight gain curve and fitting heat erosion kinetic curve of nickel-base high-temperature single crystal alloy testpieces under film component；
Fig. 9 shows the alloy heat erosion kinetic curve comparison diagram being fitted under the salt film component of three kinds of salting liquids；
Figure 10-Figure 12 is shown respectively in disclosure exemplary embodiment in the first salting liquid, the second salting liquid, third salt
Nickel-base high-temperature single crystal alloy testpieces is in 200 hours rear surface pattern optical microscopes of heat erosion under the salt film component of solution；
Table 1- table 3 respectively illustrate the first salting liquid, the second salting liquid, third salting liquid salt film component under Ni-based list
The related data of the heat erosion kinetic curve of brilliant high temperature alloy testpieces fitting.
Wherein, coordinate system is with heating time T (h) for abscissa in each figure, with the unit area weight gain Δ W of testpieces
(g/cm2) it is ordinate.Type-1 represents the salt film component of the first salting liquid, Type-2 represent the salt film of the second salting liquid at
Point, Type-3 represents the salt film component of third salting liquid.In addition, can be used simultaneously to improve the accuracy of test data
Multiple testpieces carry out parallel test.In this test, the testpieces quantity of each salting liquid spraying all can be three, in each figure
The test data of one of testpieces is respectively represented with dot, square, triangle.
The alloy heat erosion kinetic curve related data being fitted under the salt film component of 1. first salting liquid of table
The alloy heat erosion kinetic curve related data being fitted under the salt film component of 2. second salting liquid of table
The alloy heat erosion kinetic curve related data being fitted under the salt film component of 3. third salting liquid of table
It is as follows referring to above-mentioned Fig. 3-Figure 12, table 1- table 3, conclusion (of pressure testing):
1), nickel-base high-temperature single crystal alloy is under conditions of 900 DEG C, salt film component Type-1, in 0~30h stage, heat erosion
Rate constant Kp=0.06816mg/ (cm)2/ h, the incubation period in heat erosion；In 50h~200h stage, heat erosion rate is normal
Number Kp=29.54231 (mg/ (cm)2/h)2, the accelerated corrosion stage in heat erosion.
Nickel-base high-temperature single crystal alloy is under conditions of 900 DEG C, salt film component Type-2, in 0~10h stage, heat erosion speed
Rate constant Kp=0.26938mg/ (cm)2/ h, the incubation period in heat erosion；In 50h~200h stage, heat erosion rate constant
Kp=23.33036 (mg/ (cm)2/h)2, the accelerated corrosion stage in heat erosion.
Nickel-base high-temperature single crystal alloy does not observe the incubation period of heat erosion under 900 DEG C, salt film component Type-3 type,
The only accelerated corrosion phase of heat erosion.In 0~30h stage, heat erosion rate constant Kp=0.44295mg/ (cm)2/h；In 30h
~200h stage, heat erosion rate constant Kp=25.50334 (mg/ (cm)2/h)2。
The heat erosion rate constant of alloy is successively increased according to tri- kinds of salt film component sequences of Type-1, Type-2, Type-3,
Heat erosion situation successively aggravates.
2), heat erosion rate of the alloy under the three kinds of salt film components rule that changes with time all shows first to increase and subtracts afterwards
Small variation tendency.Unlike, under Type-1 salt film component, within the scope of preceding 30h, the heat erosion rate of alloy close to 0,
Illustrate that sample is in the stage almost without generation weight gain；It and is the not no trend under Type-2 and Type-3 salt film component.Knot
The analysis of kinetic curve is closed, hot corrosion behavior of the sample under Type-1 salt film component has apparent heat erosion incubation period；
And hot corrosion behavior of the sample under Type-2 and Type-3 salt film component is mainly shown as apparent heat erosion accelerated period, without bright
Aobvious heat erosion incubation period.
3) the heat erosion dynamics that, comparison nickel-base high-temperature single crystal alloy is fitted under the salt film component of three kinds of salting liquids is bent
Line.As shown in figure 9, alloy has longer heat erosion incubation period under Type-1 salt film component, under Type-2 salt film component
Alloy heat erosion incubation period is relatively short, and the heat erosion incubation period of alloy is not observed under Type-3 salt film component.
The total heat surrosion under three kinds of salt film components after sample heat erosion 200h is compared it is found that under Type-1 salt film component
Sample heat erosion total augment weight is close with sample heat erosion total augment weight under Type-3 salt film component, and is all larger than Type-2 salt film component
Lower sample heat erosion total augment weight.But heat erosion kinetic curve weight gain trend and Type-3 salt film component under Type-2 salt film component
Lower heat erosion kinetic curve weight gain trend is increasingly similar.
Above-mentioned described feature, structure or characteristic can be incorporated in one or more embodiment party in any suitable manner
In formula, if possible, it is characterized in discussed in each embodiment interchangeable.In the above description, it provides many specific thin
Section fully understands embodiments of the present invention to provide.It will be appreciated, however, by one skilled in the art that this can be practiced
The technical solution of invention, or can be using other methods, component, material without one or more in the specific detail
Material etc..In other cases, known features, material or operation are not shown in detail or describe to avoid each side of the invention is obscured
Face.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
Claims (10)
1. a kind of test method of nickel-base high-temperature single crystal alloy hot corrosion resistance characterized by comprising
Multiple nickel-base high-temperature single crystal alloy testpieces to be tested are provided；
Multiple and different salting liquids are provided, wherein one or more described salting liquids include vanadium；
The salt film of one layer of preset quality, and each test to salt film is had are deposited on each testpieces surface using each salting liquid
Part carries out heat erosion test to obtain test data；
According to the test data that the heat erosion is tested, heat erosion rate constant is determined.
2. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 1, which is characterized in that described
Multiple and different salting liquids include:
First salting liquid, including Na2SO4；
Second salting liquid, including Na2SO4And NaCl；
Third salting liquid, including Na2SO4, NaCl and V2O5。
3. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 2, which is characterized in that in institute
It states in third salting liquid, the V2O5Weight ratio be 1~15%.
4. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 3, which is characterized in that in institute
It states in third salting liquid, the Na2SO4Weight ratio be 75%, the weight ratio of the NaCl is 20%, the V2O5's
Weight ratio is 5%.
5. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 1-4, feature
It is, it is described to deposit the salt film of one layer of preset quality on each testpieces surface using each salting liquid, and to respectively with salt film
Testpieces carry out heat erosion and test to obtain test data include:
Step 1, by each salting liquid even application to each testpieces surface, and the salt film of preset quality is formed；
Step 2, the testpieces for respectively having salt film is kept the temperature under preset temperature；
Step 3, after keeping the temperature preset duration, each testpieces is taken out and is obtained test data, the test data includes
Each testpieces quality and surface area；
Step 4, step 1 is repeated to step 3 more times.
6. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 5, which is characterized in that described
The salt content every square centimeter on testpieces surface is 3mg, and the salt film of the preset quality is the table according to each testpieces
Area and salt content every square centimeter determine.
7. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 6, which is characterized in that described
Preset temperature is between 600 DEG C -1200 DEG C.
8. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 7, which is characterized in that each institute
The heat preservation total duration for stating testpieces was between 100-300 hours；The preset duration kept the temperature every time is between 10-50 hours.
9. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 8, which is characterized in that described
According to the test data that the heat erosion is tested, determine that heat erosion rate constant includes:
The weight gain of each testpieces of each heat erosion stage is determined according to each testpieces quality of each heat erosion stage, and is combined
Each testpieces surface area before each heat erosion stage generation determines that unit area of each testpieces in each heat erosion stage increases weight；
Using heating time as abscissa, increased weight with the unit area of testpieces for ordinate, according to each testpieces in each heat
The unit area weight gain data in corrosion stage, draw heat erosion dynamic curve diagram；
According to heat erosion dynamics formula, each testpieces heat erosion kinetic curve is simulated, and determines the heat of each testpieces
Corrosion rate constant.
10. the test method of nickel-base high-temperature single crystal alloy hot corrosion resistance according to claim 9, which is characterized in that institute
Stating heat erosion dynamics formula is
△W2=Kp·t+C
Wherein △ W is the unit area weight gain after testpieces heat erosion, KpFor heat erosion rate constant, t is the heat erosion time, and C is
Heat erosion kinetic constant.
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