CN100430718C - Equipment and method for detecting steel solidification shrinkage rate - Google Patents
Equipment and method for detecting steel solidification shrinkage rate Download PDFInfo
- Publication number
- CN100430718C CN100430718C CNB2004100172165A CN200410017216A CN100430718C CN 100430718 C CN100430718 C CN 100430718C CN B2004100172165 A CNB2004100172165 A CN B2004100172165A CN 200410017216 A CN200410017216 A CN 200410017216A CN 100430718 C CN100430718 C CN 100430718C
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- corundum crucible
- shrinkage rate
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 23
- 239000010959 steel Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007711 solidification Methods 0.000 title claims abstract description 16
- 230000008023 solidification Effects 0.000 title claims abstract description 16
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 21
- 239000010431 corundum Substances 0.000 claims abstract description 21
- 229910016006 MoSi Inorganic materials 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 4
- 229910020968 MoSi2 Inorganic materials 0.000 abstract 2
- 238000005266 casting Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
The present invention relates to an appliance and a method for testing, particularly to an appliance and a method for detecting the solidification shrinkage rate of steel, which solves the defect of the insufficient reality of the present test of the solidification shrinkage rate of steel. In the appliance for detecting the solidification shrinkage rate of steel, a sample is put into a corundum crucible, the corundum crucible is arranged in an MoSi2 furnace, an electric heat couple is respectively connected with the sample and a temperature controller positioned outside the corundum crucible, an X-ray penetrating device and an image enhancing screen are respectively positioned at both sides of the MoSi2 furnace, a high-pressure generator is connected with the image enhancing screen, the image enhancing screen amplifies a received signal and inputs the signal into a charge coupled device, and the charge coupled device is respectively connected with a computer, a video recorder and a monitor. The shrinkage rate of the volume of various kinds of steel in the whole solidifying process of a liquid state to a solid state is accurately and continuously measured by an X-ray transmitting method, and the real characteristic of the solidification shrinkage rate of steel can be obtained. The present invention has significance for accurately and reasonably determining a continuous casting technology and the relevant appliance parameters of the continuous casting technology and enhancing the quality and the success ratio of casting blanks.
Description
(1) technical field
The present invention relates to a kind of testing apparatus and method of testing, particularly a kind of checkout equipment of steel solidification shrinkage rate and detection method.
(2) background technology
Have two kinds for the common way of the calculating of steel solidification shrinkage rate: a kind of is that thermal expansivity is got constant, and another kind is that austenite gets 2.2 * 10 in calculating
-5℃
-1, and ferrite gets 1.55 * 10
-5℃
-1But the result of calculation that adopts these two kinds of methods to obtain often is difficult to the genuine property of the solidification shrinkage of embodiment steel.
(3) summary of the invention:
The technical issues that need to address of the present invention are: realization obtains the genuine property of the solidification shrinkage of steel.
Technical scheme of the present invention is that a kind of solidification shrinkage rate checkout equipment of steel is characterized in that checkout equipment is by watertight device, MoSi
2Stove, roentgenoscope, temperature controller, thermopair, corundum crucible, sample, video strengthen parts such as screen, high pressure generator, charge-coupled device (CCD), computing machine, video tape recorder, monitor and form, sample is contained in the corundum crucible, and corundum crucible is loaded on MoSi
2In the stove, thermopair connects sample respectively and is positioned at the outer temperature controller of corundum crucible, and roentgenoscope and video strengthen screen and lay respectively at MoSi
2The both sides of stove, high pressure generator connect video and strengthen screen, and high pressure generator provides operating voltage for video strengthens screen; Video strengthens screen the signal of accepting is amplified and the input charge-coupled device (CCD), charge-coupled device (CCD) connects computing machine, video tape recorder, monitor respectively, charge-coupled device (CCD) is converted into the depth map picture signals of sample with the signal that receives and by the video tape recorder recording storage, the monitor playing image, the shrinkage factor of COMPUTER CALCULATION tapping in process of setting; The concrete processing step of detection method is as follows:
(1), will measure with the steel sample and be processed into cylindricality barred body sample, in the corundum crucible of packing into, at room temperature vertically put airtight MoSi then into
2In the electric furnace, the logical Ar protection of corundum crucible in heat temperature raising and experimentation, Ar discharges through the watertight device;
(2), the sample heating was incubated 10-30 minute then until fusing fully in 5-6 hour;
(3), after insulation finishes, by thermopair and temperature controller control MoSi
2Electric furnace is with the speed cooling of 0.5-2 ℃/min, in temperature-fall period, every specimen length data of uniform temperature interval measurement, each measurement point insulation 2-5 minute, measuring method is: utilize roentgenoscope to observe sample, the perspective signal that obtains projects video and strengthens screen, and video strengthens screen the signal of accepting is amplified and the input charge-coupled device (CCD), charge-coupled device (CCD) is converted into the depth map picture signals of sample with the signal that receives and by the video tape recorder recording storage, the monitor playing image;
(4), the depth map image signal of each measurement point sample passes to computing machine, the shrinkage factor of computing program calculating tapping in process of setting that the computing machine utilization is special.
The invention has the advantages that: by the method for X ray transmission, the various steel of continuous coverage are from the volumetric shrinkage of liquid state to the solid-state whole process of setting exactly.
(4) description of drawings
Accompanying drawing is a process chart of the present invention:
1-watertight device, 2-MoSi
2Stove, 3-X roentgenoscopeX, 4-temperature controller, 5-thermopair, 6-corundum crucible, 7-sample, 8-video strengthen screen, 9-high pressure generator, 10-charge-coupled device (CCD), 11-computing machine, 12-video tape recorder, 13-monitor.
(5) embodiment:
With reference to accompanying drawing, a kind of solidification shrinkage rate checkout equipment of steel is by watertight device 1, MoSi
2Stove 2, roentgenoscope 3, temperature controller 4, thermopair 5, corundum crucible 6, sample 7, video strengthen parts such as screen 8, high pressure generator 9, charge-coupled device (CCD) 10, computing machine 11, video tape recorder 12, monitor 13 and form, sample 7 is contained in the corundum crucible 6, and corundum crucible 6 is loaded on MoSi
2In the stove 2, thermopair 5 connects sample 7 and the temperature controller 4 that is positioned at outside the corundum crucible 6 respectively, and roentgenoscope 3 and video strengthen screen 8 and lay respectively at MoSi
2The both sides of stove 2, high pressure generator 9 connect video and strengthen screen 8, and high pressure generator 9 provides operating voltage for video strengthens screen 8; Video strengthens screen 8 signal of accepting is amplified and input charge-coupled device (CCD) 10, charge-coupled device (CCD) 10 connects computing machine 11, video tape recorder 12, monitor 13 respectively, charge-coupled device (CCD) 10 is converted into the depth map picture signals of sample with the signal that receives and by video tape recorder 12 recording storage, monitor 13 playing image, the shrinkage factor of COMPUTER CALCULATION tapping in process of setting; The solidification shrinkage rate of steel detects concrete processing step: will measure the cylindricality barred body sample 7 that is processed into Φ 5 * 56mm with the steel sample, Φ packs into
Internal diameterIn the corundum crucible 6 of 5 * 100mm, at room temperature vertically put airtight MoSi then into
2In the electric furnace 2, in order to prevent sample 7 oxidation takes place in heating process, adopt the Ar protection in heat temperature raising and experimentation, the Ar flow is 2L/min; The steel sample is incubated 20 minutes then being heated to 5-6 hour until fusing fully, after insulation finishes, with MoSi
2 Electric furnace 2 is with the speed cooling of 1 ℃/min; In temperature-fall period, 1568 ℃,, 1550 ℃, 1540 ℃, 1500 ℃, 1480 ℃, 1454 ℃, 1440 ℃, 1420 ℃, 1400 ℃, 1345 ℃, 1290 ℃, 1250 ℃, 1200 ℃, 1150 ℃, 1100 ℃, 1038 ℃ and 1000 ℃ measure data respectively, and each measuring point insulation 3 minutes; Utilize roentgenoscope 3 observation samples and record the volume change of each measurement point sample down by charge-coupled device (CCD) 10 and video tape recorder 12, pass to computing machine 11 then and utilize the computing program to calculate the shrinkage factor of tapping in process of setting, concrete sample calculation is as follows:
δ=(H-H
0) * S/ (H
0* S) (formula 1);
δ: volumetric shrinkage; H: the back specimen length heats up; H
0: initial specimen length is 56mm;
S: sample cross is long-pending, S=π D
2/ 4; D: specimen finish is 5mm.
After sample heated up, when temperature was reduced to 1550 ℃, the specimen length H of survey was 58.8mm, brings H into formula 1, and drawing δ is 5%.Result of calculation sees the following form:
The present invention exactly the various steel of continuous coverage from the volumetric shrinkage of liquid state to the solid-state whole process of setting, detection obtains the genuine property of the solidification shrinkage of steel, for determining that reasonably and accurately continuous casting process and relevant device parameter and raising slab quality and lumber recovery are significant.
Claims (2)
1, a kind of solidification shrinkage rate checkout equipment of steel is characterized in that checkout equipment is by watertight device, MoSi
2Stove, roentgenoscope, temperature controller, thermopair, corundum crucible, sample, video strengthen screen, high pressure generator, charge-coupled device (CCD), computing machine, video tape recorder, monitor composition, and sample is contained in the corundum crucible, and corundum crucible is loaded on MoSi
2In the stove, thermopair connects sample respectively and is positioned at the outer temperature controller of corundum crucible, and roentgenoscope and video strengthen screen and lay respectively at MoSi
2The both sides of stove, high pressure generator connect video and strengthen screen, and high pressure generator provides operating voltage for video strengthens screen; Video strengthens screen the signal of accepting is amplified and the input charge-coupled device (CCD), charge-coupled device (CCD) connects computing machine, video tape recorder, monitor respectively, charge-coupled device (CCD) is converted into the depth map picture signals of sample with the signal that receives and by the video tape recorder recording storage, the monitor playing image, the shrinkage factor of COMPUTER CALCULATION tapping in process of setting.
2, a kind of solidification shrinkage rate detection method of steel is characterized in that, the concrete processing step of detection method is as follows:
(1), will measure with the steel sample and be processed into cylindricality barred body sample, in the corundum crucible of packing into, at room temperature vertically put airtight MoSi then into
2In the electric furnace, the logical Ar protection of corundum crucible in heat temperature raising and experimentation, Ar discharges through the watertight device;
(2), the sample heating was incubated 10-30 minute then until fusing fully in 5-6 hour;
(3), after insulation finishes, by thermopair and temperature controller control MoSi
2Electric furnace is with the speed cooling of 0.5-2 ℃/min, in temperature-fall period, every specimen length data of uniform temperature interval measurement, each measurement point insulation 2-5 minute, measuring method is: utilize roentgenoscope to observe sample, the perspective signal that obtains projects video and strengthens screen, and video strengthens screen the signal of accepting is amplified and the input charge-coupled device (CCD), charge-coupled device (CCD) is converted into the depth map picture signals of sample with the signal that receives and by the video tape recorder recording storage, the monitor playing image;
(4), the depth map image signal of each measurement point sample passes to computing machine, the shrinkage factor of computing program calculating tapping in process of setting that the computing machine utilization is special.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100172165A CN100430718C (en) | 2004-03-25 | 2004-03-25 | Equipment and method for detecting steel solidification shrinkage rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100172165A CN100430718C (en) | 2004-03-25 | 2004-03-25 | Equipment and method for detecting steel solidification shrinkage rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1673726A CN1673726A (en) | 2005-09-28 |
| CN100430718C true CN100430718C (en) | 2008-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100172165A Expired - Fee Related CN100430718C (en) | 2004-03-25 | 2004-03-25 | Equipment and method for detecting steel solidification shrinkage rate |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011051561A1 (en) * | 2011-07-05 | 2013-01-10 | BÄHR-Thermoanalyse GmbH | Dilatometer for the measurement of metallic samples |
| CN102928339A (en) * | 2012-10-16 | 2013-02-13 | 大连理工大学 | Method for visually testing internal molding shrinkage characteristic of high polymer material |
| CN108375602B (en) * | 2018-03-02 | 2019-04-16 | 上海大学 | A kind of steel coagulating property high throughput test device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03245048A (en) * | 1990-02-22 | 1991-10-31 | Nec Corp | Thermal-expansion-coefficient measuring apparatus |
| JPH03269352A (en) * | 1990-03-20 | 1991-11-29 | Toray Res Center:Kk | Method and instrument for measuring thermal expansion coefficient of long sized sample |
| US5414648A (en) * | 1990-05-31 | 1995-05-09 | Integrated Diagnostic Measurement Corporation | Nondestructively determining the dimensional changes of an object as a function of temperature |
| WO1997007514A1 (en) * | 1995-08-11 | 1997-02-27 | Koppel Louis N | X-ray thickness gauge |
| CN1129775C (en) * | 1996-07-03 | 2003-12-03 | 高级研究及应用有限公司 | Straddle inspection system |
-
2004
- 2004-03-25 CN CNB2004100172165A patent/CN100430718C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03245048A (en) * | 1990-02-22 | 1991-10-31 | Nec Corp | Thermal-expansion-coefficient measuring apparatus |
| JPH03269352A (en) * | 1990-03-20 | 1991-11-29 | Toray Res Center:Kk | Method and instrument for measuring thermal expansion coefficient of long sized sample |
| US5414648A (en) * | 1990-05-31 | 1995-05-09 | Integrated Diagnostic Measurement Corporation | Nondestructively determining the dimensional changes of an object as a function of temperature |
| WO1997007514A1 (en) * | 1995-08-11 | 1997-02-27 | Koppel Louis N | X-ray thickness gauge |
| CN1129775C (en) * | 1996-07-03 | 2003-12-03 | 高级研究及应用有限公司 | Straddle inspection system |
Non-Patent Citations (4)
| Title |
|---|
| 应用软X射线对薄材料的测量. 陈曰中.物理测试，第5期. 1995 |
| 应用软X射线对薄材料的测量. 陈曰中.物理测试，第5期. 1995 * |
| 模具用锌基合金收缩率的研究. 王守实，南泰渊，赵庭良.机械工程材料，第2期. 1991 |
| 模具用锌基合金收缩率的研究. 王守实，南泰渊，赵庭良.机械工程材料，第2期. 1991 * |
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| CN1673726A (en) | 2005-09-28 |
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