CN107490519A - The method of testing and stress relaxation method for numerical simulation of the mechanical property of alloy forged piece - Google Patents
The method of testing and stress relaxation method for numerical simulation of the mechanical property of alloy forged piece Download PDFInfo
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Abstract
The present invention relates to the method for numerical simulation of a kind of method of testing of mechanical property of alloy forged piece and stress relaxation, belong to mechanics performance testing technology field, it is long to solve the problems, such as that tempering numerical simulation of the prior art obtains material mechanical performance hardly possible, experimental period.The method of testing comprises the following steps：To single organization's sample progress tempering heat treatment of multiple quenching states, under the different temperatures in temperature-rise period, sampling is cooled down, and obtains heating sample；Different time in insulating process, sampling are cooled down, and obtain insulation sample；Under different temperatures in cooling procedure, sampling is cooled down, and obtains cooling samples.It will heat up sample, insulation sample and cooling samples and be warming up to probe temperature, after even temperature, progress stress-strain test, obtain the mechanical property parameters of alloy forged piece.The method of testing of the mechanical property of alloy forged piece provided by the invention can be used for the mechanical property of beta alloy forging.
Description
Technical field
The present invention relates to a kind of mechanic property test method, more particularly to a kind of test side of the mechanical property of alloy forged piece
The method for numerical simulation of method and stress relaxation.
Background technology
With the fast development of computer technology, finite element modeling emulation technology is in alloy forged piece thermoplastic forming and Re Chu
Reason field is widely used.
Wherein, tempering is the important step of heat treatment, it is generally the case that tempering can reduce or eliminate residual stress, still,
The mechanism of stress relaxation is sufficiently complex, and carbide can be from martensite or bayesian in drawing process for the alloy material in alloy forged piece
Separate out, assemble in body, retained austenite can also decompose；Carbide in pearlite, ferrite can also occur modal
Change.So as to cause material mechanical performance to change, mechanical property change caused by above-mentioned complicated process is can not be one by one
Reflect to simulation in calculating.
Liu Zhuan of Tsing-Hua University et al. (research of Numerical Simulation of Tempering Process,《Heavy casting and forging》, the 2nd phase in 1998,
P1-7) when carrying out the numerical simulation of drawing process, complicated change of the alloy forged piece material in drawing process is simplified, with reality
The mechanical property parameters for surveying pearlite replace the mechanical property parameters of the alloy forged piece after tempering, in the process not separated out completely
In, using calculated with weighted average method parameter value.But this method excessively simplifies, it is impossible to embodies alloy forged piece to entirely accurate
Mechanical property change in drawing process.
P.Pheltlam et al. (Microstructure based flow stress modeling for quenched
And tempered low alloy steel, Materials＆Design (2015), 189-199) open describe be tempered
The model of Carbide Precipitation and flow stress in journey, but the model is only applicable to the drawing process of martensite, and in model
Parameter measurement workload it is very big.
In the prior art, directly sample can also be heat-treated on thermal simulation forcing press (Gleeble), obtained not
With the material mechanical performance under temperature, the power to obtain alloy forged piece in drawing process is then input in numerical model
Performance change is learned, however, because large forgings Technology for Heating Processing is complicated, cycle length, each tissue is determined using the above method
Stress-strain diagram, not only take time and effort, and greatly increase experimental cost.
The content of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of method of testing of mechanical property of alloy forged piece and stress pine
The method for numerical simulation of relaxation, solve the problems, such as that tempering numerical simulation is difficult to obtain material mechanical performance data in the prior art,
The method of testing can be in beta alloy forging ferrite, pearlite, bainite and/or martensitic structure in drawing process
Different phase stress-strain diagram, efficient quick, greatly reduce experimental cost.
The purpose of the present invention is mainly achieved through the following technical solutions：
The invention provides a kind of method of testing of the mechanical property of alloy forged piece, comprise the following steps：
Step S1：During the tempering heat treatment of alloy forged piece, the actual tempering of the diverse location of alloy forged piece is obtained
It is heat-treated processing procedure；
Step S2：To single organization's sample progress tempering heat treatment of multiple quenching states made of alloy forged piece, tempering
It is identical with the actual tempering heat treatment processing procedure that step S1 is obtained to be heat-treated processing procedure；
Under different temperatures in the temperature-rise period of tempering heat treatment, single organization's examination of the quenching state by heating is taken out
Sample is cooled down, and obtains a series of heating sample；
Different time in the insulating process of tempering heat treatment, take out single organization's sample of the quenching state by insulation
Cooled down, obtain a series of insulation sample；
Under different temperatures in the cooling procedure of tempering heat treatment, single organization's examination through overcooled quenching state is taken out
Sample is cooled down, and obtains a series of cooling samples；
Step S3：It will heat up sample, insulation sample and cooling samples and be warming up to probe temperature respectively, after insulation uniformly, enter
Row stress-strain test, stress-strain diagram of the quenching structure of alloy forged piece during tempering heat treatment is measured, is closed
The mechanical property parameters of bodkin part.
Further, step S1 comprises the following steps：During the tempering heat treatment of alloy forged piece, using Temperature numerical
Analogy method obtains the actual tempering heat treatment processing procedure of the diverse location of alloy forged piece.
Further, step S1 comprises the following steps：During the tempering heat treatment of alloy forged piece, surveyed using thermocouple
Warm method measures the actual tempering heat treatment processing procedure of the diverse location of alloy forged piece.
Further, step S2 comprises the following steps：
Step S21：By made of alloy forged piece single organization's sample of multiple quenching states be warming up to temperature, rising
During temperature, single organization's sample of a quenching state by heating is taken out every 50 DEG C~200 DEG C, and is cooled down, is obtained
Obtain a series of heating sample；
Step S22：After being warming up to temperature, to the single organization of the remaining quenching state by heating in step S21
Sample is incubated, and in insulating process, single organization's sample of a quenching state by insulation is taken out every 0.5h~5h,
And cooled down, obtain a series of insulation sample；
Step S23：After insulation terminates, single organization's sample of the remaining quenching state by insulation in step S22 is entered
Row is cooled down, and in cooling procedure, single organization's examination through overcooled quenching state is taken out every 50 DEG C~200 DEG C
Sample, and cooled down, obtain a series of cooling samples.
Further, step S21 comprises the following steps：The single organization of multiple quenching states made of alloy forged piece is tried
Sample is warming up to temperature, and in specimen temperature from during 150 DEG C rise to temperature, one is taken out every 50 DEG C~200 DEG C
Single organization's sample of the individual quenching state by heating, and cooled down, obtain a series of heating sample.
Further, in step S3, heating rate is more than or equal to 5 DEG C/s.
Further, single organization's sample of quenching state is martensite sample, bainite sample, pearlite sample, iron element
One or more in body sample.
Further, single organization's sample of quenching state is made with the following method：
Alloy forged piece is cut into multiple pending samples；
Pending sample is warming up to austenitizing temperature, is incubated to pending sample whole austenitizing, obtains Ovshinsky
The sample of body；
It is according to the overcooling austenite continuous cooling transformation (CCT) curve of alloy material in alloy forged piece, the sample of austenitizing is cold
But, single organization's sample of quenching state is made.
Further, the characteristic size of the cross section of alloy forged piece is more than or equal to 1m；Characteristic size is four times of alloy
The ratio of the cross-sectional area of forging and the section girth of alloy forged piece.
Present invention also offers a kind of stress relaxation method for numerical simulation of alloy forged piece, comprise the following steps：Using upper
The method of testing for stating the mechanical property of alloy forged piece measures stress of the quenching structure of alloy forged piece during tempering heat treatment
Strain curve, obtain the mechanical property parameters of alloy forged piece；By the drawing process stress of mechanical property parameters input alloy forged piece
In loose numerical model, the prediction to the stress relaxation of alloy forged piece is realized.
Compared with prior art, the present invention has the beneficial effect that：
A) in the method for testing of the mechanical property of alloy forged piece provided by the invention, single organization's sample of quenching state returns
The processing procedure intimately handled is identical with the processing procedure of the actual tempering heat treatment of alloy forged piece, it is ensured that above-mentioned method of testing can be anti-
The change for the mechanical property reflected during the actual tempering heat treatment of alloy forged piece, so as to truly reflect that alloy forged piece exists
Temperature, Carbide Precipitation in drawing process, grow up, the mechanical property change caused by change such as nodularization.The above method will be used
The mechanical property parameters measured are applied in the numerical simulation of tempering heat treatment, can improve temper stress simulation and deformation numerical value
The accuracy of simulation, so as to realize accurate control and prediction to alloy forged piece tempering heat treatment.
B) method of testing of the mechanical property of alloy forged piece provided by the invention, during tempering heat treatment, to taking out
Sample cooled down, the tempered structure structure of the sample before cooling can be retained.
C) method of testing of the mechanical property of alloy forged piece provided by the invention can save the time of experiment, reduce equipment
Loss, increase experiment exploitativeness and simplicity.
D) method of testing of the mechanical property of alloy forged piece provided by the invention can ensure said sample quick again
Tissue will not change so as to reproduce tempered structure corresponding to the tempering stage before cooling in temperature-rise period.
E) method of testing of the mechanical property of alloy forged piece provided by the invention is particularly suitable for use in the power of large-scale alloy forged piece
Learn the test of performance.
Other features and advantages of the present invention will illustrate in the following description, also, partial become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is only used for showing the purpose of specific embodiment, and is not considered as limitation of the present invention, in whole accompanying drawing
In, identical reference symbol represents identical part.
Fig. 1 is to be surveyed in the method for testing of the mechanical property of the 2.25Cr-1Mo-0.25V material shell rings of the embodiment of the present invention one
Try temperature, the schematic diagram of sample point of bainite；
Fig. 2 is to be surveyed in the method for testing of the mechanical property of the 2.25Cr-1Mo-0.25V material shell rings of the embodiment of the present invention one
Try temperature, the schematic diagram of sample point of martensite；
Fig. 3 is in the method for testing of the mechanical property of the bainite of the SA508-3 steel welding base metals of the embodiment of the present invention three
Test temperature, the schematic diagram of sample point of bainite.
Embodiment
The preferred embodiments of the present invention are specifically described below in conjunction with the accompanying drawings, wherein, accompanying drawing forms the application part, and
It is used for the principle for explaining the present invention together with embodiments of the present invention.
In a first aspect, the invention provides a kind of method of testing of the mechanical property of alloy forged piece, comprise the following steps：
Step S1：During the tempering heat treatment of alloy forged piece, the actual tempering of the diverse location of alloy forged piece is obtained
It is heat-treated processing procedure.
Step S2：Tempering heat treatment is carried out to the single organization sample of multiple quenching states made of above-mentioned alloy forged piece,
Tempering heat treatment processing procedure is identical with the actual tempering heat treatment processing procedure that step S1 is obtained；In the temperature-rise period of tempering heat treatment
Under different temperatures, the single organization's sample for taking out the quenching state by heating is cooled down (for example, water quenching or stove are cold), is obtained
A series of heating sample；Different time in the insulating process of tempering heat treatment, take out the list of the quenching state by insulation
One tissue sample is cooled down, and obtains a series of insulation sample；Under different temperatures in the cooling procedure of tempering heat treatment,
Take out single organization's sample through overcooled quenching state to be cooled down, obtain a series of cooling samples.
Step S3：Above-mentioned heating sample, insulation sample and cooling samples are warming up to probe temperature respectively, insulation is uniform
Afterwards, stress-strain test is carried out, measures stress-strain diagram of the quenching structure of alloy forged piece during tempering heat treatment, from
And obtain the mechanical property parameters of alloy forged piece.
Compared with prior art, in the method for testing of the mechanical property of alloy forged piece provided by the invention, the list of quenching state
The processing procedure of the tempering heat treatment of one tissue sample is identical with the processing procedure of the actual tempering heat treatment of alloy forged piece, it is ensured that above-mentioned
The change for the mechanical property that method of testing can reflect during the actual tempering heat treatment of alloy forged piece, so as to truly
Reflect temperature of the alloy forged piece in drawing process, Carbide Precipitation, grow up, the mechanical property change caused by change such as nodularization.
The mechanical property parameters measured using the above method are applied in the numerical simulation of tempering heat treatment, temper stress can be improved
Simulation and the accuracy of deformation numerical simulation, so as to realize accurate control and prediction to alloy forged piece tempering heat treatment.
Also, during tempering heat treatment, single organization's sample of the quenching state of taking-up is cooled down, can be retained
The tempered structure structure of the sample before cooling.
In addition, the above method can save the time of experiment, equipment loss, increase experiment exploitativeness and simplicity are reduced
Property.
Specifically, in above-mentioned steps S1, Temperature numerical analogy method can be used to obtain the difference of above-mentioned alloy forged piece
The actual tempering heat treatment processing procedure of position；Or the difference of above-mentioned alloy forged piece can also be measured using thermocouple temperature measurement method
The actual tempering heat treatment processing procedure of position.It is of course also possible to use other modes obtain the different positions of above-mentioned alloy forged piece
The actual tempering heat treatment processing procedure put, is not limited one by one herein.
For step S2, it comprises the following steps：
Step S21：By made of alloy forged piece single organization's sample of multiple quenching states be warming up to temperature, rising
During temperature, single organization's sample of a quenching state by heating is taken out every 50 DEG C~200 DEG C, and is cooled down, is obtained
Obtain a series of heating sample.
Step S22：After being warming up to temperature, to the single organization of the remaining quenching state by heating in step S21
Sample is incubated, and in insulating process, single organization's sample of a quenching state by insulation is taken out every 0.5h~5h,
And cooled down, obtain a series of insulation sample.
Step S23：After insulation terminates, single organization's sample of the remaining quenching state by insulation in step S22 is entered
Row is cooled down, and in cooling procedure, single organization's examination through overcooled quenching state is taken out every 50 DEG C~200 DEG C
Sample, and cooled down, obtain a series of cooling samples.
In order to further save experimental period, in above-mentioned steps S21, after 150 DEG C can be warming up to, every 50 DEG C~200
Single organization's sample of a quenching state by heating DEG C is taken out, and is cooled down, obtains a series of heating sample.This is
Because the temperature of single organization's sample of quenching state, below 150 DEG C, the tissue of alloy material will not send out change, therefore,
In order to further save experimental period, it can select after being warming up to 150 DEG C, every 50 DEG C~200 DEG C taking-ups, one quenching state
Single organization's sample.
For step S3, it comprises the following steps：
10 × 15mm of φ that heating sample, insulation sample and cooling samples that step S2 is obtained are processed into standard compress examination
Sample, multiple compression samples are warming up to probe temperature respectively, after insulation uniformly, answered on Gleeble thermal simulation forcing presses
Stress-strain is tested, and stress-strain diagram of the quenching structure of alloy forged piece during tempering heat treatment is measured, so as to be closed
The mechanical property parameters of bodkin part.
In order to ensure to heat up, sample, insulation sample and cooling samples are in temperature-rise period or tissue will not change, on
State in step S3, heating rate should be more than or equal to 5 DEG C/s, and because programming rate is fast, heating will not cause extra carbonization
The precipitation of thing and other changes, organize so as to ensureing said sample in rapid heating condition again to change from
And tempered structure corresponding to the tempering stage before cooling can be reproduced.
It should be noted that the single organization of above-mentioned quenching state refers in martensite, bainite, pearlite, ferrite
It is one or more, then, correspondingly, single organization's sample of quenching state refers to martensite sample, bainite sample, pearlite examination
One or more in sample, ferrite sample.
And the preparation of single organization's sample for quenching state, it can be made with the following method：
Alloy forged piece is cut into multiple pending samples；
Above-mentioned pending sample is warming up to austenitizing temperature, is incubated to above-mentioned pending sample whole austenitizing,
Obtain the sample of austenitizing；
According to the overcooling austenite continuous cooling transformation (CCT) curve (CCT curve) of alloy material in alloy forged piece, by above-mentioned Austria
The sample cooling of family name's body, single organization's sample of quenching state is made.
During using above-mentioned method of testing testing large alloy forged piece, compared to prior art, it is saving the time of experiment,
Equipment loss is reduced, exploitativeness is tested in increase and the advantage of simplicity is particularly evident, it is necessary to explanation, large-scale alloy forged piece
Refer to that the characteristic size of cross section is more than or equal to 1m alloy forged piece.Characteristic size refers to the cross section of four times of alloy forged piece
The ratio of the section girth of area and alloy forged piece, for example, when the cross section of alloy forged piece is shaped as circle, it is special
Levy the π R of size=42/ 2 π R=2R, that is to say, that circular characteristic size is its diameter D, wherein, R is circular radius, and D is
Circular diameter；When the cross section of alloy forged piece is shaped as rectangle, its characteristic size=4AB/2 (A+B), wherein, A is length
Square width, B are rectangular length.
Second aspect, the invention provides a kind of method for numerical simulation of the stress relaxation of alloy forged piece, including following step
Suddenly：The quenching structure of alloy forged piece is measured in tempering heat treatment process using the method for testing of the mechanical property of above-mentioned alloy forged piece
In stress-strain diagram, obtain the mechanical property parameters of alloy forged piece；By above-mentioned mechanical property parameters input alloy forged piece
In the numerical model of stress relaxation, so as to realize the prediction to the stress relaxation of alloy forged piece.
Compared with prior art, the beneficial effect of the method for numerical simulation of the stress relaxation of alloy forged piece provided by the invention
It is similar to the beneficial effect of the method for testing of the mechanical property of above-mentioned alloy forged piece, it will not be repeated here.
Embodiment one
Present embodiments provide a kind of 2.25Cr-1Mo-0.25V materials bainite, mechanics of the martensite in drawing process
The method of testing of performance, as shown in Figure 1 to Figure 2.Wherein, 2.25,1,0.25 mass percent for each meaning corresponding each element.
The present embodiment is organized in the method for testing of the stress-strain diagram in drawing process to bainite, marquench,
Comprise the following steps：
Step SA：Using Temperature numerical analogy method, the tempering heat treatment of 2.25Cr-1Mo-0.25V material shell rings is measured
Processing procedure (temperature curve), wherein, tempering heating rate is 50 DEG C/h, and temperature is 710 DEG C, tempering insulation time 6h, is returned
The fiery type of cooling is that stove is cold；
Step SB：By spark cutting means, by 2.25Cr-1Mo-0.25V material shell rings cut into 30 φ 15 ×
The pending samples of 20mm；
Step SC：15 pending samples are loaded onto heat-treatment furnace respectively, and with 5 DEG C/s speed be rapidly heated to
900 DEG C, 5min is incubated, room temperature is then cooled to 50 DEG C/min cooldown rate, respectively obtains 15 bainite samples；
15 pending samples are loaded onto heat-treatment furnace respectively, and are rapidly heated with 5 DEG C/s speed to 900 DEG C,
5min is incubated, room temperature is then cooled to the type of cooling of water cooling, obtains 15 martensite samples；
Step SD：Above-mentioned 15 bainite samples and 15 martensite samples are all put into heat-treatment furnace and returned
Burning hot processing, wherein, tempering heating rate is 50 DEG C/h, and temperature is 710 DEG C, tempering insulation time 6h, tempering cooling
Mode is that stove is cold；
Step SE：In the temperature-rise period of tempering heat treatment, specimen temperature be 150 DEG C, 250 DEG C, 380 DEG C, 450 DEG C,
At 520 DEG C, 650 DEG C, a bainite sample and a martensite sample are taken out respectively, and carries out water quenching immediately, obtain a system
The heating bainite sample and heating martensite sample of row；
Step SF：When be warming up to tempering temperature 710 DEG C after, remaining bainite sample and martensite sample in step SE are entered
Row insulation, in insulating process, quarter, intermediate time and finish time at the beginning of holding stage, a bayesian is taken out respectively
Body sample and a martensite sample, and water quenching is carried out immediately, obtain a series of insulation bainite sample and insulation martensite
Sample；
Step SG：After insulation terminates, remaining bainite sample and martensite sample in step SF are cooled down,
In cooling procedure, when specimen temperature is 650 DEG C, 520 DEG C, 450 DEG C, 380 DEG C, 250 DEG C, 150 DEG C, a bayesian is taken out respectively
Body sample and a martensite sample, and water quenching is carried out immediately, obtain a series of cooling bainite sample and cooling martensite
Sample；
Step SH：By above-mentioned heating bainite sample, heating martensite sample, insulation bainite sample, insulation martensite
Sample, cooling bainite sample and cooling martensite sample (P29~P41, Q29~Q41) are processed into 10 × 15mm of φ of standard
Compress sample；
Step SI：The compression sample processed is installed on Gleeble thermal simulation forcing presses, and with 5 DEG C/s speed
Probe temperature is warming up to respectively, 10s is incubated, then with 0.001s-1 strain rate compression 20%, measures bainite, martensite
Stress-strain diagram of the quenching structure during tempering heat treatment.
Embodiment two
Present embodiments provide a kind of numerical simulation side of the temper stress relaxation of 2.25Cr-1Mo-0.25V materials shell ring
Method, comprise the following steps：
Bainite is measured using the method for testing of embodiment one, marquench be organized in during tempering heat treatment should
Stress-strain curve, acquisition bainite, marquench are organized in the mechanical property parameters during tempering heat treatment；
Above-mentioned mechanical property parameters are input in the numerical simulator of hydrogenation shell ring Tempering and Quenching Deformation Prediction, obtained
Aberration nephogram after to tempering, so as to be predicted to the heat treatment deformation of 2.25Cr-1Mo-0.25V material shell rings.
Embodiment three
Present embodiments provide a kind of survey of mechanical property of bainite of SA508-3 steel welding base metal in drawing process
Method for testing, as shown in Figure 3.
The stress that Bainitic hardening of the present embodiment to SA508-3 steel welding base metals is organized in during tempering heat treatment should
The method of testing of varied curve, comprises the following steps：
Step SA：Using Temperature numerical analogy method, the tempering heat treatment process temperatures for obtaining SA508-3 tests piece for welding are bent
Line, wherein, tempering heating rate is 25 DEG C/h, and temperature is 620 DEG C, tempering insulation time 40h, and the tempering type of cooling is
15 DEG C/h stoves are cold；
Step SB：By spark cutting means, it is pending that SA508-3 tests piece for welding are cut into 26 15 × 20mm of φ
Sample；
Step SC：Above-mentioned 26 samples are all put into heat-treatment furnace and carry out tempering heat treatment, wherein, tempering heating
Speed is 25 DEG C/h, and temperature is 620 DEG C, tempering insulation time 40h, and the tempering type of cooling is that 15 DEG C/h stoves are cold；
Step SD：In the temperature-rise period of tempering heat treatment, specimen temperature be room temperature, 300 DEG C when, it is each to take out an examination
Sample, and water quenching is carried out immediately, obtain a series of heating sample；
Step SE：When be warming up to tempering temperature 620 DEG C after, remaining sample in step SD is incubated, in insulating process
In, respectively in 0h, 0.5h, 1h, 2h, 3h, 4h, 6h, 25h and 40h of tempering holding stage, a sample is respectively taken out, and immediately
Water quenching is carried out, obtains a series of insulation sample；
Step SF：After insulation terminates, remaining sample in step SE is cooled down, in cooling procedure, in sample
Temperature is 300 DEG C, room temperature, respectively takes out a sample, and carries out water quenching immediately, obtains a series of cooling samples；
Step SG：By above-mentioned heating sample, insulation sample and cooling samples (1#~12#) be processed into the φ 10 of standard ×
15mm compresses sample；
Step SH：The compression sample processed is installed on Gleeble thermal simulation forcing presses, and with 5 DEG C/s speed
Probe temperature is warming up to respectively, 10s is incubated, then with 0.001s-1Strain rate compression 20%, measure SA508-3 steel welding
The Bainitic hardening of mother metal is organized in the stress-strain diagram during tempering heat treatment.
Example IV
A kind of method for numerical simulation of the temper stress relaxation of SA508-3 steel welding base metal is present embodiments provided, including
Following steps：
The Bainitic hardening that SA508-3 steel welding base metals are measured using the method for testing of embodiment three is organized at tempering heat
Stress-strain diagram during reason, obtain the mechanical property parameters of SA508-3 steel welding base metals；
Above-mentioned mechanical property parameters are input in the numerical simulator of post weld heat treatment, so as to answer post weld heat treatment
The prediction of power relaxation.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.
Claims (10)
1. a kind of method of testing of the mechanical property of alloy forged piece, it is characterised in that comprise the following steps：
Step S1：During the tempering heat treatment of alloy forged piece, at the actual tempering heat for the diverse location for obtaining alloy forged piece
Manage processing procedure；
Step S2：To single organization's sample progress tempering heat treatment of multiple quenching states made of the alloy forged piece, tempering
It is identical with the actual tempering heat treatment processing procedure that step S1 is obtained to be heat-treated processing procedure；
Under different temperatures in the temperature-rise period of tempering heat treatment, the single organization's sample for taking out the quenching state by heating enters
Row cooling, obtains a series of heating sample；
Different time in the insulating process of tempering heat treatment, the single organization's sample for taking out the quenching state by insulation are carried out
Cooling, obtains a series of insulation sample；
Under different temperatures in the cooling procedure of tempering heat treatment, take out single organization's sample through overcooled quenching state and enter
Row cooling, obtains a series of cooling samples；
Step S3：Heating sample, insulation sample and the cooling samples are warming up to probe temperature respectively, after insulation uniformly, entered
Row stress-strain test, stress-strain diagram of the quenching structure of the alloy forged piece during tempering heat treatment is measured, is obtained
Obtain the mechanical property parameters of the alloy forged piece.
2. the method for testing of the mechanical property of alloy forged piece according to claim 1, it is characterised in that the step S1 bags
Include following steps：
During the tempering heat treatment of alloy forged piece, the different positions of the alloy forged piece are obtained using Temperature numerical analogy method
The actual tempering heat treatment processing procedure put.
3. the method for testing of the mechanical property of alloy forged piece according to claim 1, it is characterised in that the step S1 bags
Include following steps：
During the tempering heat treatment of alloy forged piece, the diverse location of the alloy forged piece is measured using thermocouple temperature measurement method
Actual tempering heat treatment processing procedure.
4. the method for testing of the mechanical property of alloy forged piece according to claim 1, it is characterised in that the step S2 bags
Include following steps：
Step S21：By made of the alloy forged piece single organization's sample of multiple quenching states be warming up to temperature, rising
During temperature, single organization's sample of a quenching state by heating is taken out every 50 DEG C~200 DEG C, and is cooled down, is obtained
Obtain a series of heating sample；
Step S22：After being warming up to temperature, to single organization's sample of the remaining quenching state by heating in step S21
It is incubated, in insulating process, every single organization's sample that 0.5h~5h takes out a quenching state by insulation, is gone forward side by side
Row cooling, obtains a series of insulation sample；
Step S23：After insulation terminates, single organization's sample of the remaining quenching state by insulation in step S22 is entered to advance
Row cooling, in cooling procedure, single organization's sample through overcooled quenching state is taken out every 50 DEG C~200 DEG C, and
Cooled down, obtain a series of cooling samples.
5. the method for testing of the mechanical property of alloy forged piece according to claim 4, it is characterised in that the step S21
Comprise the following steps：
Single organization's sample of multiple quenching states made of the alloy forged piece is warming up to temperature, specimen temperature from
During 150 DEG C rise to temperature, single organization's examination of a quenching state by heating is taken out every 50 DEG C~200 DEG C
Sample, and cooled down, obtain a series of heating sample.
6. the method for testing of the mechanical property of alloy forged piece according to claim 1, it is characterised in that the step S3
In, heating rate is more than or equal to 5 DEG C/s.
7. the method for testing of the mechanical property of the alloy forged piece according to any one of claim 1 to 6, it is characterised in that institute
State single organization's sample of quenching state for martensite sample, bainite sample, pearlite sample, one kind in ferrite sample or
It is a variety of.
8. the method for testing of the mechanical property of the alloy forged piece according to any one of claim 1 to 6, it is characterised in that institute
The single organization's sample for stating quenching state is made with the following method：
The alloy forged piece is cut into multiple pending samples；
The pending sample is warming up to austenitizing temperature, is incubated to the pending sample whole austenitizing, obtains
The sample of austenitizing；
According to the overcooling austenite continuous cooling transformation (CCT) curve of alloy material in the alloy forged piece, by the examination of the austenitizing
Sample cools down, and single organization's sample of the quenching state is made.
9. the method for testing of the mechanical property of the alloy forged piece according to any one of claim 1 to 6, it is characterised in that institute
The characteristic size for stating the cross section of alloy forged piece is more than or equal to 1m；
The characteristic size be four times alloy forged piece cross-sectional area and alloy forged piece section girth ratio.
10. the stress relaxation method for numerical simulation of a kind of alloy forged piece, it is characterised in that comprise the following steps：
The alloy forged piece is measured using the method for testing of the mechanical property of the alloy forged piece described in any one of claim 1 to 9
Stress-strain diagram of the quenching structure during tempering heat treatment, obtain the mechanical property parameters of the alloy forged piece；Will
In the numerical model of the drawing process stress relaxation of the mechanical property parameters input alloy forged piece, realize to the alloy forged piece
Stress relaxation prediction.
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| CN114113201A (en) * | 2021-09-30 | 2022-03-01 | 洛阳中重铸锻有限责任公司 | Physical simulation method for heat treatment performance of large-scale casting and forging |
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