CN110333146A - A kind of hot compress test sample and hot compress test method - Google Patents
A kind of hot compress test sample and hot compress test method Download PDFInfo
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- CN110333146A CN110333146A CN201910651045.8A CN201910651045A CN110333146A CN 110333146 A CN110333146 A CN 110333146A CN 201910651045 A CN201910651045 A CN 201910651045A CN 110333146 A CN110333146 A CN 110333146A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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Abstract
This application discloses a kind of hot compress test sample and hot compress test methods, wherein hot compress test sample includes main part, the main part includes at least the first order frustum of a cone and the second level frustum of a cone of the axial arranging along central axis, the first order frustum of a cone is located at the axially external of the second level frustum of a cone, the main part is centrosymmetric structure, and the main part can be along its axial carrying pressure；Also, the main part is structure as a whole.Hot compress test sample provided herein, by rationally designing multi-level cone platform sample, the eurytopic local equivalents strain constant region of width can be obtained, its corresponding relationship with equivalent strain can be accurately established by characterizing Deformation structure, and then broader equivalent strain range is obtained, to improve the efficiency of high-throughput experiment.
Description
Technical field
This application involves metal material heat processing fields, try more particularly to a kind of hot compress test sample and hot compression
Proved recipe method.
Background technique
In metal material hot-working field, for the heat processing technique window for establishing metal material, generally use cylinder sample into
Row different temperatures, differently strained rate and differently strained hot compress test obtain, strain-tissue of Lai Jianli metal material
Relationship.
However, strain gradient is precipitous, and strain-tissue of foundation closes due to Strain Distribution narrow range after cylinder sample deformation
It is that data volume is limited, in the prior art, by introducing double cone platform sample, can be obtained more inside a double cone platform sample
Wide scope, more continuously distributed strain field, the experiment effect of multiple cylinder samples is reached as a kind of high throughput method.
Simultaneously as during the cylinder test of different batches, there are temperature, heating rate, head velocity, coefficient of frictions
Etc. othernesses, in contrast so that double cone platform test experimental precision and data reliability it is higher, such as Fig. 1 (a) and Fig. 2 (a)
It is shown, although the strain field distribution inside double cone platform sample is gentler compared to cylinder sample, from sample center to edge still
The variation tendency continuously declined is presented, causes acquisition local train-Deformation structure correlation can only be in very narrow range of strain
Interior progress, it is difficult to establish the mapping relations between accurate Deformation Parameters and material structure.
Therefore, corresponding relationship between the Deformation Parameters and material structure of testing resulting metal material how is effectively improved
Accuracy is a technical problem that technical personnel in the field need to solve at present.
Apply for content
The purpose of the application is to provide a kind of hot compress test sample and hot compress test method, for realizing to metal
The target of the topically effective strain constant control of material, biggish part section obtains constant Deformation structure inside sample,
Be conducive to establish the correlation of accurate deformation parameter-tissue.
To achieve the above object, the application provides the following technical solutions:
A kind of hot compress test sample, including main part, the main part include at least the axial direction along central axis
The first order frustum of a cone and the second level frustum of a cone of arrangement, the axis that the first order frustum of a cone is located at the second level frustum of a cone are outside
Side, the main part are centrosymmetric structure, and the main part can be along its axial carrying pressure；Also, the main part
It is divided into integral structure.
Preferably, there is first order frustum of a cone table top and the first order frustum of a cone conical surface on the first order frustum of a cone, it is described
There is second level frustum of a cone table top and the second level frustum of a cone conical surface on the frustum of a cone of the second level；The second level frustum of a cone table top is in ring
Shape, between the first order frustum of a cone conical surface and the second level frustum of a cone conical surface, and the second level frustum of a cone table top
Perpendicular to the extending direction of the central axis.
Preferably, further include the third level frustum of a cone, there is third level frustum of a cone table top and the on the third level frustum of a cone
The three-level frustum of a cone conical surface, the third level frustum of a cone table top in a ring, are located at the second level frustum of a cone conical surface and the third
Between the grade frustum of a cone conical surface, extending direction of the third level frustum of a cone table top perpendicular to the central axis.
Preferably, the axial middle part of the main part is equipped with middle section, and the axial sides of the middle section are extremely
It is placed with the first order frustum of a cone and the second level frustum of a cone less, and the structure of the axial sides of the middle section is about the circle
Cylinder is symmetrical.
A kind of hot compress test method, using above-mentioned hot compress test sample, comprising the following steps:
Step S1: the hot compress test sample is obtained；
Step S2: hot pressing is carried out along the axial direction for stating hot compress test sample；
Step S3: the equivalent strain for obtaining inside center to the edge of the hot compress test sample is distributed；
Step S4: material member of the hot compress test sample in equivalent strain section is obtained；
Step S5: the mapping relations of deformation parameter and material structure are established.
Preferably, in the step S2, the temperature of the hot pressing is 940-960 DEG C, speed 0.01/s.
Preferably, in the step S2, as the 30-70% to the hot compress test with sample hot pressing to maximum deformation quantity
After stop hot pressing.
Hot compress test sample provided herein, including main part, the main part include at least in
The first order frustum of a cone and the second level frustum of a cone of the axial arranging of mandrel, the first order frustum of a cone are located at the second level circular cone
Platform it is axially external, the main part is centrosymmetric structure, the main part can along its axial carrying pressure, also,
The main part is structure as a whole.Hot compress test sample provided herein, by rationally designing multi-level cone platform
Sample can obtain width eurytopic local equivalents strain constant region, by characterize Deformation structure can accurately establish its with etc.
The corresponding relationship that effect becomes, and then broader equivalent strain range is obtained, to improve the efficiency of high-throughput experiment.
Hot compress test method provided herein, by using above-mentioned hot compress test sample, due to the heat
Compression test is had above-mentioned technique effect with sample, therefore, using the hot compress test method of above-mentioned hot compress test sample
It should also be as that there is corresponding technical effect.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 (a) is a kind of structural representation of specific embodiment of provided hot compress test sample in the prior art
Figure；
Fig. 1 (b) is a kind of structural schematic diagram of specific embodiment of hot compress test sample provided herein；
Fig. 1 (c) is the structural schematic diagram of second of specific embodiment of hot compress test sample provided herein；
Fig. 1 (d) is the structural schematic diagram of the third specific embodiment of hot compress test sample provided herein；
Fig. 1 (e) is the structural schematic diagram of the 4th kind of specific embodiment of hot compress test sample provided herein；
Fig. 2 (a) is the inside equivalent strain field pattern of hot compress test sample after hot-pressing shown in Fig. 1 (a)；
Fig. 2 (b) is the inside equivalent strain field pattern of hot compress test sample after hot-pressing shown in Fig. 1 (b)；
Fig. 2 (c) is the inside equivalent strain field pattern of hot compress test sample after hot-pressing shown in Fig. 1 (c)；
Fig. 2 (d) is the inside equivalent strain field pattern of hot compress test sample after hot-pressing shown in Fig. 1 (d)；
Fig. 2 (e) is the inside equivalent strain field pattern of hot compress test sample after hot-pressing shown in Fig. 1 (e)；
Fig. 3 is influence of the height of middle section to Shi Zaili needed for hot pressing；
Fig. 4 be Fig. 1 (a), Fig. 1 (b), hot compress test sample shown in Fig. 1 (e) after hot-pressing sample inside center to side
The distribution of edge equivalent strain；
Fig. 5 is the second level frustum of a cone height of hot compress test sample shown in Fig. 1 (b), Fig. 1 (c) in sample inside
The influence that the heart is distributed to edge equivalent strain；
Fig. 6 is the second level frustum of a cone mesa width of hot compress test sample shown in Fig. 1 (b), Fig. 1 (c) in sample
The influence that portion center is distributed to edge equivalent strain；
Fig. 7 is a kind of stereochemical structure signal of specific embodiment of hot compress test sample provided by the present embodiment
Figure；
Fig. 8 is the main view of hot compress test sample shown in Fig. 7；
Wherein: the first order frustum of a cone (1), first order frustum of a cone table top (1-1), the first order frustum of a cone conical surface (1-2), second
The grade frustum of a cone (2), second level frustum of a cone table top (2-1), the second level frustum of a cone conical surface (2-2), the third level frustum of a cone (3), centre
Partially (4).
Specific embodiment
The core of the application is to provide a kind of hot compress test sample and hot compress test method, for realizing to metal
The target of the topically effective strain constant control of material, biggish part section obtains constant Deformation structure inside sample,
Be conducive to establish the correlation of accurate deformation parameter-tissue.
In order to make those skilled in the art more fully understand application scheme, with reference to the accompanying drawings and detailed description
The application is described in further detail.
Fig. 1 to Fig. 8 is please referred to, Fig. 1 (a) is a kind of specific implementation of provided hot compress test sample in the prior art
The structural schematic diagram of mode, the sample abbreviation double cone platform sample or single order sample；Fig. 1 (b) is hot pressing provided herein
A kind of structural schematic diagram of specific embodiment of contracting test sample, -1 sample of sample abbreviation second order；Fig. 1 (c) is the application
The structural schematic diagram of provided hot compress test second of specific embodiment of sample, -2 sample of sample abbreviation second order；
Fig. 1 (d) is the structural schematic diagram of the third specific embodiment of hot compress test sample provided herein, sample letter
Claim -3 sample of second order；Fig. 1 (e) is that the structure of the 4th kind of specific embodiment of hot compress test sample provided herein is shown
It is intended to, the sample referred to as three rank samples；Fig. 2 (a) is that the inside of hot compress test sample after hot-pressing shown in Fig. 1 (a) is equivalent
Strain field distribution figure；Fig. 2 (b) is the inside equivalent strain field distribution of hot compress test sample after hot-pressing shown in Fig. 1 (b)
Figure；Fig. 2 (c) is the inside equivalent strain field pattern of hot compress test sample after hot-pressing shown in Fig. 1 (c)；Fig. 2 (d) is
Inside equivalent strain field pattern of the hot compress test shown in Fig. 1 (d) with sample after hot-pressing；Fig. 2 (e) is heat shown in Fig. 1 (e)
Inside equivalent strain field pattern of the compression test with sample after hot-pressing；Fig. 3 is that the height of middle section is applied to needed for hot pressing
Carry the influence of power；Fig. 4 is Fig. 1 (a), Fig. 1 (b), hot compress test sample shown in Fig. 1 (e) sample inside center after hot-pressing
It is distributed to edge equivalent strain；Fig. 5 is the second level frustum of a cone height pair of hot compress test sample shown in Fig. 1 (b), Fig. 1 (c)
The influence that sample inside center is distributed to edge equivalent strain；Fig. 6 is hot compress test sample shown in Fig. 1 (b), Fig. 1 (c)
The influence that second level frustum of a cone mesa width is distributed sample inside center to edge equivalent strain；Fig. 7 is mentioned by the present embodiment
For a kind of schematic perspective view of specific embodiment of hot compress test sample；Fig. 8 is hot compress test shown in Fig. 7
With the main view of sample；Dimensional units are mm in figure.
In this embodiment, hot compress test sample includes main part, and the middle part of main part is equipped with central axis,
Main part includes at least the first order frustum of a cone 1 and the second level frustum of a cone 2 of the axial arranging along central axis, the first order frustum of a cone
1 is located at the axially external of the second level frustum of a cone 2, and main part is centrosymmetric structure, i.e., in the central axis of main part
Axial direction on, be sequentially distributed first frustum of a cone, the second level frustum of a cone 2, the second level frustum of a cone 2 and the first order frustum of a cone 1, main body
It part can be along its axial carrying pressure, i.e., when carrying out autoclave test, on the surface for two first order frustums of a cone 1 for being located at two sides
Pressure；Also, main part is structure as a whole, such as can cut for large-sized metal material.
Hot compress test sample provided herein can obtain width by rationally designing multi-level cone platform sample
Eurytopic local equivalents strain constant region, can accurately establish its pass corresponding with equivalent strain by characterizing Deformation structure
System, and then broader equivalent strain range is obtained, to improve the efficiency of high-throughput experiment.
On the basis of the respective embodiments described above, there is first order frustum of a cone table top 1-1 and first on the first order frustum of a cone 1
Grade frustum of a cone conical surface 1-2, has second level frustum of a cone table top 2-1 and second level frustum of a cone conical surface 2-2 on the second level frustum of a cone 2；
Second level frustum of a cone table top 2-1 in a ring, between first order frustum of a cone conical surface 1-2 and second level frustum of a cone conical surface 2-2, and
Extending direction of the second level frustum of a cone table top 2-1 perpendicular to central axis.That is first order frustum of a cone conical surface 1-2 and the second level frustum of a cone
By the 2-1 transition of second level frustum of a cone table top between conical surface 2-2, when the central axis of main part extends along the vertical direction, the
Second level frustum of a cone table top 2-1 is located at horizontality.
On the basis of the respective embodiments described above, further includes the third level frustum of a cone 3, there is third on the third level frustum of a cone 3
Grade 3 table top of the frustum of a cone and 3 conical surface of the third level frustum of a cone, 3 table top of the third level frustum of a cone in a ring, are located at the second level frustum of a cone conical surface
Between 3 conical surface of 2-2 and the third level frustum of a cone, extending direction of 3 table top of the third level frustum of a cone perpendicular to central axis.It needs exist for
It is bright, the equivalent strain range point of the widths affect of 3 table top of second level frustum of a cone table top 2-1 and third level frustum of a cone sample
Cloth, in practical applications, can by change second level frustum of a cone table top 2-1 and 3 table top of the third level frustum of a cone width, into
Row adjustment.
On the basis of the respective embodiments described above, the axial middle part of main part is equipped with middle section 4, middle section 4
Axial sides are at least placed with the first order frustum of a cone 1 and the second level frustum of a cone 2, and the knot of the axial sides of middle section 4
Structure is symmetrical about cylindrical body.Preferably, middle section 4 is cylindrical, and the height of middle section 4 is the side of entire sample
Face height H.
Specifically, in order to match with the structure of double cone platform sample in the prior art, also, by changing middle part
Divide 4 height H, adjustable Shi Zaili.
Specifically, reducing intermediate in the identical situation of diameter of the total height and middle section 4 of retention value main part
The height H of part 4 can increase equivalent strain range inside sample, and required Shi Zaili is declined, as shown in Figure 3.
In addition to above-mentioned hot compress test sample, present invention also provides a kind of hot compress test methods.
The hot compress test method the following steps are included:
Step S1: hot compress test sample is obtained；
Step S2: hot pressing is carried out along the axial direction for stating hot compress test sample；
Step S3: the equivalent strain for obtaining inside center to the edge of hot compress test sample is distributed；
Step S4: material member of the hot compress test sample in equivalent strain section is obtained；
Step S5: the mapping relations of deformation parameter and material structure are established.
On the basis of the respective embodiments described above, in step S2, the temperature of hot pressing is 940-960 DEG C, speed 0.01/s,
Deflection i.e. per second is the 1% of maximum deformation quantity.
On the basis of the respective embodiments described above, in step S2, when to hot compress test sample hot pressing to maximum distortion
Stop hot pressing after the 50% of amount.What needs to be explained here is that above-mentioned maximum deformation quantity refers to when sample carries maximum load
Deflection.
Specifically, hot compress test sample and hot compress test method provided by the present embodiment, in order to compare this Shen
Please in multi-level cone platform sample and double cone platform sample in the prior art test effect, secure frustum of a cone sample most
Major diameter and maximum height.Such as: the diameter of each middle section 4 shown in the drawings Fig. 1 is 24mm, the total height of main part
For 10mm.
Fig. 1 (b), Fig. 1 (c) and Fig. 1 (d) are the size design of the second order frustum of a cone, and analog result is shown such as table 1, the second level
The height h of the frustum of a cone 2 determines the effective strain range and obtained constant strain size inside sample.
Constant equivalent strain size and equivalent strain range after 1 double cone of table and 950 DEG C of the second order frustum of a cone, 0.01/S hot pressing
As shown in Figure 4, constant equivalent strain width is suitable with second level frustum of a cone table top 2-1 width in the second order frustum of a cone,
Also, the N rank frustum of a cone can get N-1 constant equivalent strain sections；It will be appreciated from fig. 6 that the second level frustum of a cone in the second order frustum of a cone
During the horizontal distance of table top 2-1 and sample axis determines that the equivalent strain from sample center to edge is distributed, constant equivalent strain
The horizontal position that area occurs.
The sample of the present embodiment can get N-1 constant strain region, single order circular cone after N rank frustum of a cone sample hot pressing
The strain at platform sample hot pressing rear center to edge is successively decreased in near-linear, does not have constant strain area；There is a perseverance in the second order frustum of a cone
Determine strain regions, the three rank frustums of a cone occur two, and constant strain sector width is suitable with the rotary table mesa width of corresponding stage；It is keeping
In the case that the base diameter and height of the single order frustum of a cone are constant, the effects such as the height h decision part of the second level frustum of a cone 2 is constant
Variate, with the reduction of second level cone height h, equivalent strain range increases；As shown in figure 5, working as the second level frustum of a cone 2 a height of first
The sum of the height of the grade frustum of a cone 1 and the second level frustum of a cone 2 87.5% when, such as -1 sample of second order, there is constant equivalent strain value
It is 0.72, equivalent strain range 0.21~0.96 inside sample；When a height of first order frustum of a cone 1 and second of the second level frustum of a cone 2
The sum of the height of the grade frustum of a cone 2 62.5% when, such as -2 sample of second order, there is constant equivalent strain value and fall to 0.48, sample
Internal equivalent strain range increases to 0.13~1.36, is more than double cone platform sample, i.e. single order sample, internal equivalent strain range
Value 0.17~1.17, high throughput preparation effect are more significant；It will be appreciated from fig. 6 that axis of the second level frustum of a cone table top 2-1 away from sample
Closer, constant strain area reaches fastlyer in the Strain Distribution from center to edge.
Novel circular frustum sample provided by the present embodiment, available local wider range is constant equivalent upon compression
Strain region is conducive to structure observation and other characterizations, is conducive to establish accurate Deformation Parameters and microdeformation tissue
Correlation.More broadly, by rationally designing multistage frustum of a cone sample, the eurytopic local equivalents strain of width can be obtained
Constant region can accurately establish itself and equivalent strain corresponding relationship by characterizing Deformation structure, available broader equivalent
Range of strain improves the efficiency of high-throughput experiment.
Hot compress test provided herein sample and hot compress test method are described in detail above.This
Specific case is applied in text, and the principle and implementation of this application are described, the explanation of above example is only intended to
Help understands the present processes and its core concept.It should be pointed out that for those skilled in the art,
Under the premise of not departing from the application principle, can also to the application, some improvement and modification can also be carried out, these improvement and modification are also fallen
Enter in the protection scope of the claim of this application.
Claims (7)
1. a kind of hot compress test sample, which is characterized in that including main part, the main part is included at least along center
The first order frustum of a cone (1) and the second level frustum of a cone (2) of the axial arranging of axis, the first order frustum of a cone (1) are located at described the
The second level frustum of a cone (2) it is axially external, the main part is centrosymmetric structure, and the main part can be along its axial carrying
Pressure；Also, the main part is structure as a whole.
2. hot compress test sample according to claim 1, which is characterized in that have on the first order frustum of a cone (1)
There are first order frustum of a cone table top (1-1) and the first order frustum of a cone conical surface (1-2), has second on the second level frustum of a cone (2)
Grade frustum of a cone table top (2-1) and the second level frustum of a cone conical surface (2-2)；The second level frustum of a cone table top (2-1) in a ring, is located at
Between the first order frustum of a cone conical surface (1-2) and the second level frustum of a cone conical surface (2-2), and the second level frustum of a cone platform
Extending direction of the face (2-1) perpendicular to the central axis.
3. hot compress test sample according to claim 2, which is characterized in that further include the third level frustum of a cone (3), institute
Stating has the third level frustum of a cone (3) table top and the third level frustum of a cone (3) conical surface on the third level frustum of a cone (3), the third level circle
Frustum (3) table top in a ring, between the second level frustum of a cone conical surface (2-2) and the third level frustum of a cone (3) conical surface,
Extending direction of the third level frustum of a cone (3) table top perpendicular to the central axis.
4. according to claim 1 to hot compress test sample described in 3 any one, which is characterized in that the main part
Axial middle part be equipped with middle section (4), the axial sides of the middle section (4) are at least placed with the first order frustum of a cone
(1) and the second level frustum of a cone (2), and the structure of the axial sides of the middle section (4) is right about the middle section (4)
Claim distribution.
5. a kind of hot compress test method, using the hot compress test sample as described in Claims 1-4 any one,
It is characterized in that, comprising the following steps:
Step S1: the hot compress test sample is obtained；
Step S2: hot pressing is carried out along the axial direction for stating hot compress test sample；
Step S3: the equivalent strain for obtaining inside center to the edge of the hot compress test sample is distributed；
Step S4: material member of the hot compress test sample in equivalent strain section is obtained；
Step S5: the mapping relations of deformation parameter and material structure are established.
6. hot compress test method according to claim 5, which is characterized in that in the step S2, the temperature of the hot pressing
Degree is 940-960 DEG C, speed 0.01/s.
7. hot compress test method according to claim 5, which is characterized in that in the step S2, when to the hot pressing
Stop hot pressing after contracting test sample hot pressing to the 30-70% of maximum deformation quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910651045.8A CN110333146B (en) | 2019-07-18 | 2019-07-18 | Sample for thermal compression test and thermal compression test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910651045.8A CN110333146B (en) | 2019-07-18 | 2019-07-18 | Sample for thermal compression test and thermal compression test method |
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| CN109946126B (en) * | 2019-03-04 | 2020-12-01 | 清华大学 | High-throughput experimental method for obtaining plastic forming process and performance relation of alloy material |
| CN109900560B (en) * | 2019-03-05 | 2021-05-18 | 中国科学院金属研究所 | Metal material deformation-structure relation testing method based on frustum-shaped sample |
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