CN107490519B - The test method and stress relaxation method for numerical simulation of the mechanical property of alloy forged piece - Google Patents
The test method 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 test method of the mechanical property of alloy forged piece and stress relaxation, belong to mechanics performance testing technology field, and it is long to solve the problems, such as that tempering numerical simulation in the prior art obtains material mechanical performance hardly possible, experimental period.The test method includes the following steps: to carry out single organization's sample of multiple quenching states tempering heat treatment, under the different temperatures in temperature-rise period, samples and cooled down, obtain heating sample；Different time in insulating process, sampling are cooled down, and heat preservation sample is obtained；Under different temperatures in cooling procedure, sampling is cooled down, and obtains cooling samples.It will heat up sample, heat preservation sample and cooling samples and be warming up to probe temperature, after even temperature, progress stress-strain test obtains the mechanical property parameters of alloy forged piece.The test method 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 sides of the mechanical property of alloy forged piece
The method for numerical simulation of method and stress relaxation.
Background technique
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 link 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
It is precipitated, assembles in body, retained austenite can also decompose；Carbide in pearlite, ferrite can also occur modal
Variation.It changes so as to cause material mechanical performance, the variation of mechanical property caused by the process of above-mentioned complexity is can not be one by one
Reflect into simulation calculating.
Liu Zhuan of Tsinghua 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 variation 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 being precipitated completely
In, using calculated with weighted average method parameter value.But this method excessively simplifies, and embodies alloy forged piece with being unable to entirely accurate
Mechanical property variation 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 press machine (Gleeble), is obtained not
With the material mechanical performance under tempering temperature, the power for obtaining alloy forged piece in drawing process is then input in numerical model
Performance change is learned, however, the period is long, measures each tissue using the above method since large forgings heat treatment process is complicated
Stress-strain diagram not only takes time and effort, and greatly increases experimental cost.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of test method of mechanical property of alloy forged piece and stress pine
The method for numerical simulation of relaxation solves the problems, such as that tempering numerical simulation is difficult to obtain material mechanical performance data in the prior art,
The test method can ferrite, pearlite, bainite and/or martensitic structure in beta alloy forging in drawing process
Different phase stress-strain diagram, efficient quick greatly reduces experimental cost.
The purpose of the present invention is mainly achieved through the following technical solutions:
The present invention provides a kind of test methods of the mechanical property of alloy forged piece, include the following steps:
Step S1: during the tempering heat treatment of alloy forged piece, the practical tempering of the different location of alloy forged piece is obtained
It is heat-treated processing procedure；
Step S2: tempering heat treatment, tempering are carried out to single organization's sample of multiple quenching states made of alloy forged piece
It is identical as the practical tempering heat treatment processing procedure that step S1 is obtained to be heat-treated processing procedure；
Under the 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 a series of heating sample is obtained；
Different time in the insulating process of tempering heat treatment takes out single organization's sample of the quenching state by heat preservation
It is cooled down, obtains a series of heat preservation sample；
Under the 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 a series of cooling samples are obtained；
Step S3: will heat up sample, heat preservation sample and cooling samples and be warming up to probe temperature respectively, after heat preservation uniformly, into
Row stress-strain test measures stress-strain diagram of the quenching structure of alloy forged piece during tempering heat treatment, is closed
The mechanical property parameters of bodkin part.
Further, step S1 includes the following steps: during the tempering heat treatment of alloy forged piece, using temperature value
Analogy method obtains the practical tempering heat treatment processing procedure of the different location of alloy forged piece.
Further, step S1 includes the following steps: to survey during the tempering heat treatment of alloy forged piece using thermocouple
Warm method measures the practical tempering heat treatment processing procedure of the different location of alloy forged piece.
Further, step S2 includes the following steps:
Step S21: single organization's sample of multiple quenching states made of alloy forged piece is warming up to tempering temperature, is being risen
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, and is obtained
Obtain a series of heating sample；
Step S22: after being warming up to tempering temperature, to the single organization of the quenching state by heating remaining in step S21
Sample is kept the temperature, and in insulating process, takes out single organization's sample of a quenching state by heat preservation every 0.5h~5h,
And cooled down, obtain a series of heat preservation sample；
Step S23: after heat preservation, in step S22 it is remaining by heat preservation quenching state single organization's sample into
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 includes the following steps: single organization's examination of the quenching state made of alloy forged piece by multiple
Sample is warming up to tempering temperature, in specimen temperature from during rising to tempering temperature for 150 DEG C, takes out one every 50 DEG C~200 DEG C
Single organization's sample of a quenching state by heating, and cooled down, obtain a series of heating sample.
Further, in step S3, heating rate is greater 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 of body sample is a variety of.
Further, single organization's sample of quenching state is made with the following method:
Alloy forged piece is cut into multiple samples to be processed；
Sample to be processed is warming up to austenitizing temperature, keeps the temperature to sample whole austenitizing to be processed, 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 greater than or equal to 1m；The alloy that characteristic size is four times
The ratio of the section girth of the cross-sectional area and alloy forged piece of forging.
The present invention also provides a kind of stress relaxation method for numerical simulation of alloy forged piece, include the following steps: using upper
The test method 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 obtains 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 test method of the mechanical property of alloy forged piece provided by the invention, single organization's sample of quenching state is returned
The processing procedure intimately handled is identical as the processing procedure of practical tempering heat treatment of alloy forged piece, it is ensured that above-mentioned test method can be anti-
The variation for reflecting the mechanical property during the actual tempering heat treatment of alloy forged piece, exists so as to be truly reflected alloy forged piece
Temperature, Carbide Precipitation in drawing process are grown up, mechanical property variation caused by nodularization etc. changes.The above method will be used
The mechanical property parameters measured are applied in the numerical simulation of tempering heat treatment, and temper stress simulation and deformation numerical value can be improved
The accuracy of simulation, to realize the accurate control and prediction to alloy forged piece tempering heat treatment.
B) test method of the mechanical property of alloy forged piece provided by the invention, during tempering heat treatment, to taking-up
Sample cooled down, the tempered structure structure of the sample before cooling can be retained.
C) test method of the mechanical property of alloy forged piece provided by the invention can save the time of experiment, reduce equipment
Loss increases experiment exploitativeness and simplicity.
D) test method of the mechanical property of alloy forged piece provided by the invention can guarantee said sample quick again
Tissue will not change so as to reproduce the corresponding tempered structure of tempering stage before cooling in temperature-rise period.
E) test method of the mechanical property of alloy forged piece provided by the invention is particularly suitable for 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
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is surveyed in the test method for the mechanical property of the 2.25Cr-1Mo-0.25V material shell ring of the embodiment of the present invention one
Try the tempering temperature of bainite, the schematic diagram of sample point；
Fig. 2 is surveyed in the test method for the mechanical property of the 2.25Cr-1Mo-0.25V material shell ring of the embodiment of the present invention one
Try the tempering temperature of martensite, the schematic diagram of sample point；
Fig. 3 is in the test method of the mechanical property of the bainite of the SA508-3 steel welding base metal of the embodiment of the present invention three
Test the tempering temperature of bainite, the schematic diagram of sample point.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention.
In a first aspect, including the following steps: the present invention provides a kind of test method of the mechanical property of alloy forged piece
Step S1: during the tempering heat treatment of alloy forged piece, the practical tempering of the different location of alloy forged piece is obtained
It is heat-treated processing procedure.
Step S2: carrying out tempering heat treatment to single organization's sample of multiple quenching states made of above-mentioned alloy forged piece,
Tempering heat treatment processing procedure is identical as the practical 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 carries out cooling (for example, water quenching or furnace are cold), obtains
A series of heating sample；Different time in the insulating process of tempering heat treatment takes out the list of the quenching state by heat preservation
One tissue sample is cooled down, and a series of heat preservation sample is obtained；Under the different temperatures in the cooling procedure of tempering heat treatment,
It takes out single organization's sample through overcooled quenching state to be cooled down, obtains a series of cooling samples.
Step S3: above-mentioned heating sample, heat preservation sample and cooling samples are warming up to probe temperature respectively, heat preservation is uniform
Afterwards, stress-strain test is carried out, stress-strain diagram of the quenching structure of alloy forged piece during tempering heat treatment is measured, from
And obtain the mechanical property parameters of alloy forged piece.
Compared with prior art, in the test method 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 as the processing procedure of practical tempering heat treatment of alloy forged piece, it is ensured that above-mentioned
Test method is able to reflect the variation of the mechanical property 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, mechanical property variation caused by nodularization etc. changes.
The mechanical property parameters measured using the above method are applied in the numerical simulation of tempering heat treatment, temper stress can be improved
The accuracy of simulation and deformation numerical simulation, to realize the 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 is reduced, increases experiment exploitativeness and simplicity
Property.
Specifically, in above-mentioned steps S1, the difference of above-mentioned alloy forged piece can be obtained using temperature value analogy method
The practical tempering heat treatment processing procedure of position；Alternatively, the difference of above-mentioned alloy forged piece can also be measured using thermocouple temperature measurement method
The practical 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 practical tempering heat treatment processing procedure set, does not limit one by one herein.
For step S2 comprising following steps:
Step S21: single organization's sample of multiple quenching states made of alloy forged piece is warming up to tempering temperature, is being risen
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, and is obtained
Obtain a series of heating sample.
Step S22: after being warming up to tempering temperature, to the single organization of the quenching state by heating remaining in step S21
Sample is kept the temperature, and in insulating process, takes out single organization's sample of a quenching state by heat preservation every 0.5h~5h,
And cooled down, obtain a series of heat preservation sample.
Step S23: after heat preservation, in step S22 it is remaining by heat preservation quenching state single organization's sample into
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
The single organization's sample for DEG C taking out a quenching state by heating, and is cooled down, obtains a series of heating sample.This is
Because the temperature of single organization's sample of quenching state at 150 DEG C hereinafter, the tissue of alloy material will not send out variation, therefore,
It in order to further save experimental period, can choose after being warming up to 150 DEG C, take out a quenching state every 50 DEG C~200 DEG C
Single organization's sample.
For step S3 comprising following steps:
Heating sample, heat preservation sample and cooling samples that step S2 is obtained are processed into 10 × 15mm of φ compression examination of standard
Multiple compression samples are warming up to probe temperature after heat preservation uniformly respectively and are answered on Gleeble thermal simulation press machine by sample
Stress-strain test, measures stress-strain diagram of the quenching structure of alloy forged piece during tempering heat treatment, to be closed
The mechanical property parameters of bodkin part.
In order to guarantee to heat up, sample, heat preservation sample and cooling samples are in temperature-rise period or tissue will not change, on
It states in step S3, heating rate should be greater than or equal to 5 DEG C/s, and since heating rate is fast, heating not will cause additional carbonization
The precipitation of object and other variations, organize so as to guaranteeing said sample in rapid heating condition again will not to change from
And the corresponding tempered structure of tempering stage before cooling can be reproduced.
It should be noted that the single organization of above-mentioned quenching state refer to martensite, bainite, pearlite, in ferrite
It is one or more, then, correspondingly, single organization's sample of quenching state refers to martensite sample, bainite sample, pearlite examination
One of sample, ferrite sample are a variety of.
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 samples to be processed；
Above-mentioned sample to be processed is warming up to austenitizing temperature, is kept the temperature to above-mentioned sample whole austenitizing to be processed,
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 of family name's body is cooling, and single organization's sample of quenching state is made.
When using above-mentioned test method testing large alloy forged piece, compared with the prior art, the time tested is being saved,
Equipment loss is reduced, the advantage for increasing experiment exploitativeness and simplicity is particularly evident, it should be noted that large-scale alloy forged piece
Refer to that the characteristic size of cross section is greater than or equal to the alloy forged piece of 1m.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 shape of the cross section of alloy forged piece is circle, spy
Levy size=4 π R2/ 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 shape of the cross section of alloy forged piece is rectangle, characteristic size=4AB/2 (A+B), wherein A is length
Rectangular width, B are rectangular length.
Second aspect, the present invention provides a kind of method for numerical simulation of the stress relaxation of alloy forged piece, including walk as follows
It is rapid: the quenching structure of alloy forged piece is measured in tempering heat treatment process using the test method 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, 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
Similar to the beneficial effect of the test method of the mechanical property of above-mentioned alloy forged piece, details are not described herein.
Embodiment one
Present embodiments provide a kind of 2.25Cr-1Mo-0.25V material bainite, mechanics of the martensite in drawing process
The test method 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 woven in the test method of the stress-strain diagram in drawing process to bainite, marquench group,
Include the following steps:
Step SA: temperature value analogy method is used, the tempering heat treatment of 2.25Cr-1Mo-0.25V material shell ring is measured
Processing procedure (temperature curve), wherein tempering heating rate is 50 DEG C/h, and tempering temperature is 710 DEG C, tempering insulation time 6h, is returned
The fiery type of cooling is that furnace is cold；
Step SB: by spark cutting means, by 2.25Cr-1Mo-0.25V material shell ring be cut into 30 φ 15 ×
20mm sample to be processed；
Step SC: 15 samples to be processed are loaded onto heat-treatment furnace respectively, and with the rate of 5 DEG C/s be rapidly heated to
900 DEG C, 5min is kept the temperature, is then cooled to room temperature with the cooling rate of 50 DEG C/min, respectively obtains 15 bainite samples；
15 samples to be processed are loaded onto heat-treatment furnace respectively, and are rapidly heated with the rate of 5 DEG C/s to 900 DEG C,
5min is kept the temperature, is then cooled to room temperature with 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 are returned
Burning hot processing, wherein tempering heating rate is 50 DEG C/h, and tempering temperature is 710 DEG C, tempering insulation time 6h, tempering cooling
Mode is that furnace 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 carry out water quenching immediately, obtain a system
The heating bainite sample and heating martensite sample of column；
Step SF: after being warming up to 710 DEG C of tempering temperature, to bainite sample remaining in step SE and martensite sample into
Row heat preservation at the beginning of holding stage, intermediate time and finish time, takes out a bayesian in insulating process respectively
Body sample and a martensite sample, and water quenching is carried out immediately, obtain a series of heat preservation bainite sample and heat preservation martensite
Sample；
Step SG: after heat preservation, cooling down bainite sample remaining in step SF and martensite sample,
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, heat preservation bainite sample, heat preservation martensite
10 × 15mm of φ of standard is processed into sample, cooling bainite sample and cooling martensite sample (P29~P41, Q29~Q41)
Compress sample；
Step SI: the compression sample processed is installed on Gleeble thermal simulation press machine, and with the rate of 5 DEG C/s
It is warming up to probe temperature respectively, 10s is kept the temperature, then with 0.001s-1 strain rate compression 20%, measures bainite, martensite
Stress-strain diagram of 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 material shell ring
Method includes the following steps:
Bainite is measured using the test method of embodiment one, marquench group is woven in answering during tempering heat treatment
Stress-strain curve obtains bainite, marquench group is woven in the mechanical property parameters during tempering heat treatment；
Above-mentioned mechanical property parameters are input in the numerical simulator for adding hydrogen shell ring Tempering and Quenching Deformation Prediction, are obtained
Aberration nephogram after to tempering, to predict the heat-treatment distortion of 2.25Cr-1Mo-0.25V material shell ring.
Embodiment three
Present embodiments provide a kind of survey of mechanical property of the bainite of SA508-3 steel welding base metal in drawing process
Method for testing, as shown in Figure 3.
The present embodiment is woven in the stress during tempering heat treatment to the Bainitic hardening group of SA508-3 steel welding base metal and answers
The test method of varied curve, includes the following steps:
Step SA: using temperature value analogy method, and the tempering heat treatment process temperatures for obtaining SA508-3 test piece for welding are bent
Line, wherein tempering heating rate is 25 DEG C/h, and tempering temperature is 620 DEG C, tempering insulation time 40h, and the tempering type of cooling is
15 DEG C/h furnace is cold；
Step SB: by spark cutting means, it is to be processed that SA508-3 test piece for welding is 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
Rate is 25 DEG C/h, and tempering temperature is 620 DEG C, tempering insulation time 40h, and the tempering type of cooling is that 15 DEG C/h furnace is cold；
Step SD: each to take out an examination when specimen temperature is room temperature, 300 DEG C in the temperature-rise period of tempering heat treatment
Sample, and water quenching is carried out immediately, obtain a series of heating sample；
Step SE: after being warming up to 620 DEG C of tempering temperature, remaining sample in step SD is kept the temperature, 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, a series of heat preservation sample is obtained；
Step SF: after heat preservation, 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 carry out water quenching immediately, obtains a series of cooling samples；
Step SG: by above-mentioned heating sample, heat preservation 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 press machine, and with the rate of 5 DEG C/s
It is warming up to probe temperature respectively, 10s is kept the temperature, then with 0.001s-1Strain rate compression 20%, measure SA508-3 steel welding
The Bainitic hardening group of base material is woven 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:
It is woven at tempering heat using the Bainitic hardening group that the test method of embodiment three measures SA508-3 steel welding base metal
Stress-strain diagram during reason obtains the mechanical property parameters of SA508-3 steel welding base metal；
Above-mentioned mechanical property parameters are input in the numerical simulator of post weld heat treatment, to answer post weld heat treatment
The prediction of power relaxation.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of test method of the mechanical property of alloy forged piece, which comprises the steps of:
Step S1: it during the tempering heat treatment of alloy forged piece, obtains at the practical tempering heat of the different location of alloy forged piece
Manage processing procedure；
Step S2: tempering heat treatment, tempering are carried out to single organization's sample of multiple quenching states made of the alloy forged piece
It is identical as the practical tempering heat treatment processing procedure that step S1 is obtained to be heat-treated processing procedure；
Under the different temperatures in the temperature-rise period of tempering heat treatment, take out by heating quenching state single organization's sample into
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 heat preservation carry out
It is cooling, obtain a series of heat preservation sample；
Under the different temperatures in the cooling procedure of tempering heat treatment, take out single organization's sample through overcooled quenching state into
Row cooling, obtains a series of cooling samples；
Step S3: being warming up to probe temperature for the heating sample, heat preservation sample and cooling samples respectively, after heat preservation uniformly, into
Row stress-strain test measures stress-strain diagram of the quenching structure of alloy forged piece during tempering heat treatment, obtains
Obtain the mechanical property parameters of the alloy forged piece.
2. the test method of the mechanical property of alloy forged piece according to claim 1, which is characterized in that the step S1 packet
Include following steps:
During the tempering heat treatment of alloy forged piece, the different positions of the alloy forged piece are obtained using temperature value analogy method
The practical tempering heat treatment processing procedure set.
3. the test method of the mechanical property of alloy forged piece according to claim 1, which is characterized in that the step S1 packet
Include following steps:
During the tempering heat treatment of alloy forged piece, the different location of the alloy forged piece is measured using thermocouple temperature measurement method
Practical tempering heat treatment processing procedure.
4. the test method of the mechanical property of alloy forged piece according to claim 1, which is characterized in that the step S2 packet
Include following steps:
Step S21: single organization's sample of multiple quenching states made of the alloy forged piece is warming up to tempering temperature, is being risen
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, and is obtained
Obtain a series of heating sample；
Step S22: after being warming up to tempering temperature, to single organization's sample of the quenching state by heating remaining in step S21
It is kept the temperature, in insulating process, every single organization's sample that 0.5h~5h takes out a quenching state by heat preservation, is gone forward side by side
Row cooling, obtains a series of heat preservation sample；
Step S23: after heat preservation, single organization's sample of the quenching state by heat preservation remaining in step S22 is carried out cold
But, in cooling procedure, every 50 DEG C~200 DEG C taking-ups, one single organization's sample through overcooled quenching state, and carry out
It is cooling, obtain a series of cooling samples.
5. the test method of the mechanical property of alloy forged piece according to claim 4, which is characterized in that the step S21
Include the following steps:
Single organization's sample of multiple quenching states made of the alloy forged piece is warming up to tempering temperature, specimen temperature from
During 150 DEG C rise to tempering 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 test method of the mechanical property of alloy forged piece according to claim 1, which is characterized in that the step S3
In, heating rate is greater than or equal to 5 DEG C/s.
7. the test method of the mechanical property of alloy forged piece according to any one of claims 1 to 6, which is characterized in that institute
State quenching state single organization's sample be one of martensite sample, bainite sample, pearlite sample, ferrite sample or
It is a variety of.
8. the test method of the mechanical property of alloy forged piece according to any one of claims 1 to 6, which is characterized 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 samples to be processed；
The sample to be processed is warming up to austenitizing temperature, keeps the temperature to the sample whole austenitizing to be processed, 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 is cooling, and single organization's sample of the quenching state is made.
9. the test method of the mechanical property of alloy forged piece according to any one of claims 1 to 6, which is characterized in that institute
The characteristic size for stating the cross section of alloy forged piece is greater than or equal to 1m；
The ratio of the section girth of the cross-sectional area and alloy forged piece for the alloy forged piece that the characteristic size is four times.
10. a kind of stress relaxation method for numerical simulation of alloy forged piece, which comprises the steps of:
The alloy forged piece is measured using the test method of the mechanical property of the described in any item alloy forged pieces of claim 1 to 9
Stress-strain diagram of quenching structure during tempering heat treatment, obtain the mechanical property parameters of the alloy forged piece；It 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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