CN101762428B - Method for testing high-temperature performance of metallic tube - Google Patents
Method for testing high-temperature performance of metallic tube Download PDFInfo
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- CN101762428B CN101762428B CN2009102174651A CN200910217465A CN101762428B CN 101762428 B CN101762428 B CN 101762428B CN 2009102174651 A CN2009102174651 A CN 2009102174651A CN 200910217465 A CN200910217465 A CN 200910217465A CN 101762428 B CN101762428 B CN 101762428B
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- metal pipe
- pipe material
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Abstract
The invention relates to a method for testing high-temperature performance of a metallic tube. The method aims to solve the problem that at present, the special method for testing the high-temperature performance of the metallic tube is unavailable. The method comprises the following process steps of: 1, making a metallic tube sample; 2, printing a grid; 3, closely clamping both ends of the metallic tube sample printed with the grids on upper and lower clamps of a material stretching testing machine; 4, heating the grid part of the sample of the metallic tube to 300 to 800 DEG C; 5, stretching the metallic tube sample; 6, measuring the deformed grid of the metallic tube sample; and 7, according to the data measured before and after the circular grids in matrix arrangement are deformed, obtaining the high-temperature performance data of the metallic tube. By the method, the high-temperature performance of the metallic tube can be accurately tested without a stretching meter.
Description
Technical field
The present invention relates to a kind of method for testing high-temperature performance of metallic tube.
Background technology
Metal pipe material occupies an important position in modern industry production, and all is widely used in departments such as aviation manufacturing, engineering machinery, petrochemical complex, communications and transportation.In recent years, widespread use along with new materials such as high-strength steel, high-performance aluminium alloy and titanium alloys, the external structure of new material metal pipe material also develops into diversified complex form, metal pipe material moulding difficulty is also increasing, wherein existing metal pipe material performance improves the difficulty of bringing, and the special complicacy of bringing of metal pipe material structure is also arranged.Because the raising of metal pipe material performance causes metal pipe material plasticity when room temperature poor, must improve plasticity by mould and metal pipe material are heated, realize the metal pipe material processing and forming, in the metal pipe material molding process, need the metal pipe material plastic deformation ability is estimated.The evaluation method of existing metal pipe material plastic deformation ability is the unilateral stretching experiment, unilateral stretching experiment is to carry out having on the cupping machine of extensometer, displacement and tensile force curve by in the computer data acquisition system acquisition sample marking distance scope obtain material property through data processing then.But extensometer scarcely can be high temperature resistant, the high-temperature behavior of metal pipe material often directly obtains to resemble a little performance indexs such as extensibility, strength degree by tension test, resemble stress-strain curve, the thick anisotropy index of material and can't obtain, do not have special-purpose method for testing high-temperature performance of metallic tube at present with the relation of deflection etc.
Summary of the invention
The objective of the invention is the problem that do not have special-purpose method for testing high-temperature performance of metallic tube at present for solving, and then a kind of method for testing high-temperature performance of metallic tube is provided.
A kind of method for testing high-temperature performance of metallic tube of the present invention is realized according to following steps:
Step 1, make the metal pipe material sample: choosing the metal pipe material that length is L, is the boundary with the axis 0 of metal pipe material, and the first half two ends symmetry of metal pipe material is respectively cut away a part, makes the shortest bus length L of the metal pipe material of remainder
1Be 0.6～0.8 times of the metal pipe material length L, inclined-plane orthogonal projection and the angle α between the perpendicular bisector that remainder forms are 5～10 °, thereby obtain the metal pipe material sample;
Step 2, print grid: elder generation is at outside surface coating one deck photoresist of the first half of metal pipe material sample, see through mask then the photoresist layer of the first half outside surface of metal pipe material sample is carried out the selectivity exposure, promptly the grid outline portion that will print is exposed, described to print the grid profile be circular grid profile of arranging with matrix or the square net profile of arranging with matrix, corrode the square net profile inside that circular grid profile inside of the matrix of exposed portion being arranged with metal erosion liquid or matrix are arranged, the square net that circular grid that matrix is arranged or matrix are arranged can be printed on the upper surface of metal pipe material sample, the length of side d of the square net that the diameter phi of the circular grid that the measurement matrix is arranged or measurement matrix are arranged;
Step 3, clamping metal pipe material sample: the metal bar of two xsect semicirculars in shape that will be equal with the identical length of metal pipe material sample internal diameter passes the metal pipe material sample together, the two ends of the metal bar of xsect semicircular in shape are packed on the last lower clamp of material stretch test machine by web member, make the grid of metal pipe material sample partly be positioned at heating furnace;
Step 4, heating metal pipe material sample: the grid of metal pipe material sample partly is heated to 300 ℃～800 ℃;
Step 5: stretching metal pipe material sample: start material stretch test machine, to have the metal pipe material sample of printing grid by last anchor clamps and lower clamp radially stretches, up to tension failure, after the tension failure, the circular grid that matrix is arranged becomes oval grid, and the square net that matrix is arranged becomes the rectangle grid;
Step 6: measure the grid after the distortion on the metal pipe material sample: after the cooling, the metal pipe material sample is unloaded the transverse length d after the distortion on the measurement metal pipe material sample from last lower clamp
1Or the rectangular long edge lengths d after the distortion on the measurement metal pipe material sample
2
Step 7: the different position strain stress=Ln[(d of data computation metal pipe material sample before and after the circular distortion of the mesh of arranging according to the matrix that records
1-φ)/φ] or the square net distortion of arranging according to the matrix that records before and after the different position strain stress=Ln[(d of data computation metal pipe material sample
2-d)/d], according to width, the thickness of tensile force F and metal pipe material sample diverse location, obtain stress again by Stress calculation, can obtain the hyperthermia stress-strain curve of metal pipe material sample.
The invention has the beneficial effects as follows: method for testing high-temperature performance of metallic tube of the present invention is printed grid at the upper surface of metal pipe material sample, can obtain a plurality of and performance-relevant parameter of high-temperature material such as stress-strain, hardenability value, thick anisotropy index by the deflection of printing grid before and after metal pipe material is stretched, reduce test number (TN), greatly reduce experimentation cost; The present invention does not need extensometer can test the high-temperature behavior of metal pipe material exactly.
Description of drawings
Fig. 1 is the clamping front view that has the metal pipe material sample of the circular grid that matrix arranges in the specific embodiment of the present invention one, Fig. 2 is the clamping front view that has the metal pipe material sample of the square net that matrix arranges in the specific embodiment of the present invention one, Fig. 3 is the left view of Fig. 1 or Fig. 2, Fig. 4 is the oval grid metal pipe material sample that matrix is arranged that has after breaking in the embodiment one, and Fig. 5 is the rectangle grid metal pipe material sample that matrix is arranged that has after breaking in the embodiment one.
Embodiment
Embodiment one: shown in Fig. 1～5, the method for testing high-temperature performance of metallic tube step of present embodiment is as follows:
Step 1, make the metal pipe material sample: choosing the metal pipe material that length is L, is the boundary with the axis 0 of metal pipe material, and the first half two ends symmetry of metal pipe material is respectively cut away a part, makes the shortest bus length L of the metal pipe material of remainder
1Be 0.6～0.8 times of the metal pipe material length L, inclined-plane orthogonal projection and the angle α between the perpendicular bisector that remainder forms are 5～10 °, thereby obtain the metal pipe material sample;
Step 2, print grid: elder generation is at outside surface coating one deck photoresist of the first half of metal pipe material sample, see through mask then the photoresist layer of the first half outside surface of metal pipe material sample is carried out the selectivity exposure, promptly the grid outline portion that will print is exposed, described to print the grid profile be circular grid profile of arranging with matrix or the square net profile of arranging with matrix, corrode the square net profile inside that circular grid profile inside of the matrix of exposed portion being arranged with metal erosion liquid or matrix are arranged, the square net that circular grid that matrix is arranged or matrix are arranged can be printed on the upper surface of metal pipe material sample, the length of side d of the square net that the diameter phi of the circular grid that the measurement matrix is arranged or measurement matrix are arranged;
Step 3, clamping metal pipe material sample: the metal bar of two xsect semicirculars in shape that will be equal with the identical length of metal pipe material sample internal diameter passes the metal pipe material sample together, be packed in the two ends of the metal bar of xsect semicircular in shape on the last lower clamp of material stretch test machine by web member, make the grid of metal pipe material sample partly be positioned at heating furnace, the producer of described material stretch test machine is that Shenzhen thinks carefully that newly group company, model are CMT5000;
Step 4, heating metal pipe material sample: the grid of metal pipe material sample partly is heated to 300 ℃～800 ℃:
Step 5: stretching metal pipe material sample: start material stretch test machine, to have the metal pipe material sample of printing grid by last anchor clamps and lower clamp radially stretches, up to tension failure, after the tension failure, the circular grid that matrix is arranged becomes oval grid, and the square net that matrix is arranged becomes the rectangle grid;
Step 6: measure the grid after the distortion on the metal pipe material sample: after the cooling, the metal pipe material sample is unloaded the transverse length d after the distortion on the measurement metal pipe material sample from last lower clamp
1Or the rectangular long edge lengths d after the distortion on the measurement metal pipe material sample
2
Step 7: the different position strain stress=Ln[(d of data computation metal pipe material sample before and after the circular distortion of the mesh of arranging according to the matrix that records
1-φ)/φ] or the square net distortion of arranging according to the matrix that records before and after the different position strain stress=Ln[(d of data computation metal pipe material sample
2-d)/d], according to width, the thickness of tensile force F and metal pipe material sample diverse location, obtain stress again by Stress calculation, can obtain the hyperthermia stress-strain curve of metal pipe material sample.
Embodiment two: shown in Fig. 1～2, the length L that the metal pipe material sample is chosen in the present embodiment step 1 is the metal pipe material of 35～45mm, the length L of the shortest bus of the metal pipe material of remainder
1Be 0.7 times of metal pipe material length L.Other is identical with embodiment one.
Embodiment three: shown in Fig. 1～2, remainder forms in the present embodiment step 1 oblique line projection and the angle α between the perpendicular bisector are 6～9 °.Can selecting the size of the angle between oblique line projection that remainder forms and the perpendicular bisector according to the diameter of metal pipe material sample, other is identical with embodiment one.
Embodiment four: shown in Fig. 1～2, remainder forms in the present embodiment step 1 oblique line projection and the angle α between the perpendicular bisector are 7～8 °.Can selecting the size of the angle between oblique line projection that remainder forms and the perpendicular bisector according to the diameter of metal pipe material sample, other is identical with embodiment three.
Embodiment five: as shown in Figure 1, the diameter phi of the circular grid that matrix is arranged described in the present embodiment step 2 is 4mm.Other is identical with embodiment one.
Embodiment six: as shown in Figure 2, the length of side d of the square net that matrix is arranged described in the present embodiment step 2 is 4mm.Other is identical with embodiment one.
Embodiment seven: the grid of metal pipe material sample described in the present embodiment step 4 partly is heated to 350 ℃～750 ℃.Can select corresponding heating-up temperature according to the metal pipe material sample of different materials.Other is identical with embodiment one.
Embodiment eight: the grid of metal pipe material sample described in the present embodiment step 4 partly is heated to 400 ℃～700 ℃.Can select corresponding heating-up temperature according to the metal pipe material sample of different materials.Other is identical with embodiment seven.
Embodiment nine: the grid of metal pipe material sample described in the present embodiment step 4 partly is heated to 450 ℃～650 ℃.Can select corresponding heating-up temperature according to the metal pipe material sample of different materials.Other is identical with embodiment eight.
Embodiment ten: the grid of metal pipe material sample described in the present embodiment step 4 partly is heated to 500 ℃～600 ℃.Can select corresponding heating-up temperature according to the metal pipe material sample of different materials.Other is identical with embodiment nine.
Claims (10)
1. method for testing high-temperature performance of metallic tube is characterized in that the step of described elevated temperature property testing method is as follows:
Step 1, make the metal pipe material sample: choosing the metal pipe material that length is L, is the boundary with the axis O of metal pipe material, and the first half two ends symmetry of metal pipe material is respectively cut away a part, makes the shortest bus length L of the metal pipe material of remainder
1Be 0.6～0.8 times of the metal pipe material length L, inclined-plane orthogonal projection and the angle α between the perpendicular bisector that remainder forms are 5～10 °, thereby obtain the metal pipe material sample;
Step 2, print grid: elder generation is at outside surface coating one deck photoresist of the first half of metal pipe material sample, see through mask then the photoresist layer of the first half outside surface of metal pipe material sample is carried out the selectivity exposure, promptly the grid outline portion that will print is exposed, described to print the grid profile be circular grid profile of arranging with matrix or the square net profile of arranging with matrix, corrode the square net profile inside that circular grid profile inside of the matrix of exposed portion being arranged with metal erosion liquid or matrix are arranged, the square net that circular grid that matrix is arranged or matrix are arranged can be printed on the upper surface of metal pipe material sample, the length of side d of the square net that the diameter phi of the circular grid that the measurement matrix is arranged or measurement matrix are arranged;
Step 3, clamping metal pipe material sample: the metal bar of two xsect semicirculars in shape that will be equal with the identical length of metal pipe material sample internal diameter passes the metal pipe material sample together, the two ends of the metal bar of xsect semicircular in shape are packed on the last lower clamp of material stretch test machine by web member, make the grid of metal pipe material sample partly be positioned at heating furnace;
Step 4, heating metal pipe material sample: the grid of metal pipe material sample partly is heated to 300 ℃～800 ℃;
Step 5: stretching metal pipe material sample: start material stretch test machine, to have the metal pipe material sample of printing grid by last anchor clamps and lower clamp radially stretches, up to tension failure, after the tension failure, the circular grid that matrix is arranged becomes oval grid, and the square net that matrix is arranged becomes the rectangle grid;
Step 6: measure the grid after the distortion on the metal pipe material sample: after the cooling, the metal pipe material sample is unloaded the transverse length d after the distortion on the measurement metal pipe material sample from last lower clamp
1Or the rectangular long edge lengths d after the distortion on the measurement metal pipe material sample
2
Step 7: the different position strain stress=Ln[(d of data computation metal pipe material sample before and after the circular distortion of the mesh of arranging according to the matrix that records
1-φ)/φ] or the square net distortion of arranging according to the matrix that records before and after the different position strain stress=Ln[(d of data computation metal pipe material sample
2-d)/d], according to width, the thickness of tensile force F and metal pipe material sample diverse location, obtain stress again by Stress calculation, can obtain the hyperthermia stress-strain curve of metal pipe material sample.
2. a kind of method for testing high-temperature performance of metallic tube according to claim 1 is characterized in that: the length L that the metal pipe material sample is chosen in the step 1 is the metal pipe material of 35～45mm, the length L of the shortest bus of the metal pipe material of remainder
1Be 0.7 times of metal pipe material length L.
3. a kind of method for testing high-temperature performance of metallic tube according to claim 1 is characterized in that: remainder forms in the step 1 oblique line projection and the angle α between the perpendicular bisector are 6～9 °.
4. a kind of method for testing high-temperature performance of metallic tube according to claim 3 is characterized in that: remainder forms in the step 1 oblique line projection and the angle α between the perpendicular bisector are 7～8 °.
5. a kind of method for testing high-temperature performance of metallic tube according to claim 1 is characterized in that: the diameter phi of the circular grid that matrix is arranged described in the step 2 is 4mm.
6. a kind of method for testing high-temperature performance of metallic tube according to claim 1 is characterized in that: the length of side d of the square net that matrix is arranged described in the step 2 is 4mm.
7. a kind of method for testing high-temperature performance of metallic tube according to claim 1 is characterized in that: the grid of the sample of metal pipe material described in the step 4 partly is heated to 350 ℃～750 ℃.
8. a kind of method for testing high-temperature performance of metallic tube according to claim 7 is characterized in that: the grid of the sample of metal pipe material described in the step 4 partly is heated to 400 ℃～700 ℃.
9. a kind of method for testing high-temperature performance of metallic tube according to claim 8 is characterized in that: the grid of the sample of metal pipe material described in the step 4 partly is heated to 450 ℃～650 ℃.
10. a kind of method for testing high-temperature performance of metallic tube according to claim 9 is characterized in that: the grid of the sample of metal pipe material described in the step 4 partly is heated to 500 ℃～600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102174651A CN101762428B (en) | 2009-12-30 | 2009-12-30 | Method for testing high-temperature performance of metallic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102174651A CN101762428B (en) | 2009-12-30 | 2009-12-30 | Method for testing high-temperature performance of metallic tube |
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| Publication Number | Publication Date |
|---|---|
| CN101762428A CN101762428A (en) | 2010-06-30 |
| CN101762428B true CN101762428B (en) | 2011-06-15 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359916B (en) * | 2011-08-17 | 2013-07-10 | 广东电网公司电力科学研究院 | High temperature aging testing method for metal with varying stress |
| CN102607446A (en) * | 2011-10-21 | 2012-07-25 | 中建工业设备安装有限公司 | Method for measuring steel structure welding deformation based on gridding |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660100A2 (en) * | 1993-12-10 | 1995-06-28 | Instituto Michanikis Ylikon Kai Geodomon A.E. | Specimen design for uniform triaxial tensile stress-strain distribution under high/low temperatures |
| CN101451813A (en) * | 2008-12-12 | 2009-06-10 | 华东理工大学 | High-temperature pipe fitting radial deformation sensing device |
-
2009
- 2009-12-30 CN CN2009102174651A patent/CN101762428B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660100A2 (en) * | 1993-12-10 | 1995-06-28 | Instituto Michanikis Ylikon Kai Geodomon A.E. | Specimen design for uniform triaxial tensile stress-strain distribution under high/low temperatures |
| CN101451813A (en) * | 2008-12-12 | 2009-06-10 | 华东理工大学 | High-temperature pipe fitting radial deformation sensing device |
Non-Patent Citations (3)
| Title |
|---|
| JP昭62-190437A 1987.08.20 |
| JP昭63-53440A 1988.03.07 |
| 何祝斌等.AZ31B镁合金挤压管材的内高压成形性能.《金属学报》.2007,第43卷(第5期),534-538. * |
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