CN103436688A - Method for detecting heat radiation coefficient of steel strips - Google Patents
Method for detecting heat radiation coefficient of steel strips Download PDFInfo
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- CN103436688A CN103436688A CN2013103735344A CN201310373534A CN103436688A CN 103436688 A CN103436688 A CN 103436688A CN 2013103735344 A CN2013103735344 A CN 2013103735344A CN 201310373534 A CN201310373534 A CN 201310373534A CN 103436688 A CN103436688 A CN 103436688A
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- heat radiation
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Abstract
The invention discloses a method for detecting heat radiation coefficients of steel strips. The method comprises the following steps: selecting a first steel trip with a known heat radiation coefficient to pass through an annealing furnace, and recording annealing temperature T1; selecting a second steel strip with a heat radiation coefficient to be detected to pass through the annealing furnace, and recording annealing temperature T2; adjusting the numerical value of the annealing temperature T2 to realize that T2 is equal to T1; recording the measured value of the heat radiation coefficient of the second steel strip when T2 is equal to the T1, wherein the structure parameters of the first steel strip and the second steel strip are the same. The annealing temperature of the annealing furnace is controlled stably in continuous production working process, namely when high-strength steel following the low-carbon steel to pass through the annealing furnace, and the method solves the problem of inaccurate temperature measurement caused since the heat radiation coefficients of the steel strips change when the high-strength steel with high alloy element is produced (the heat radiation coefficients of the high-strength steel is quite different from that of ordinary low-carbon steel). Moreover, the method has the characteristics of simple structure, easiness in operation and high measuring accuracy.
Description
Technical field
The invention belongs to the steel belt continuous annealing technical field, particularly a kind of for measuring the method for steel band heat emissivity coefficient.
Background technology
Continuous annealing furnace is widely used in continuous annealing and continuous hot galvanizing line, and its Main Function is by the heat under continuous running status and the cooling annealing process that completes cold-rolled steel strip.It is of paramount importance Control the content in annealing process that temperature is controlled, and just becomes as the radiation pyrometer of temperature control foundation the key of controlling annealing process.Radiation pyrometer is that the existence function relation between the quantity of radiant energy in whole wavelength region and its temperature is determined object temperature according to object, radiation coefficient is an of paramount importance constant in this funtcional relationship, generally, in continuous annealing furnace, the radiation coefficient used of radiation pyrometer is certain value, but, when producing the higher high-strength steel of alloying element, as DP780, the belt steel surface radiation coefficient can change, differ larger with ordinary low-carbon steel, if still use identical radiation coefficient can cause the measurement temperature inaccurate.Simultaneously, owing to being continuous production, if connect high-strength steel after soft steel, when weld seam by after the temperature of the high-strength steel measured of radiation pyrometer considerable change can occur, be unfavorable for the stable control of annealing temperature.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of for measuring the method for steel band heat emissivity coefficient, realize the stable annealing furnace annealing temperature of controlling in continuous production operation process, overcome the inaccurate problem of measurement temperature that the steel strip surface heat emissivity coefficient changes and causes when producing the higher high-strength steel of alloying element.
For solving the problems of the technologies described above, the invention provides a kind ofly for measuring the method for steel band heat emissivity coefficient, comprising: choose the first steel band of known heat emissivity coefficient by annealing furnace, record annealing temperature T
1; Choose the second steel band of heat emissivity coefficient to be measured by annealing furnace, record annealing temperature T
2; Adjust described annealing temperature T
2numerical value, realize T
2=T
1; Record T
2=T
1the heat emissivity coefficient observed value of Shi Suoshu the second steel band; Wherein, described the first steel band, described the second steel band structural parameter are identical.
Further, adjust annealing temperature T
2numerical value comprise: by radiation pyrometer, described the second steel band is set to different heat emissivity coefficients, and then realizes T
2=T
1.
Further, described structural parameter comprise: thickness of strips and/or width of steel band.
Further, described the first steel band is soft steel.
Further, described the second steel band is high-strength steel.
Further, the temperature of described annealing furnace remains unchanged.
Provided by the invention a kind of for measuring the method for steel band heat emissivity coefficient, in the actual measurement working process, successively pass through annealing furnace by the first steel band and the second steel band of choosing the same structure parameter, and record corresponding annealing temperature and heat emissivity coefficient, due to the first steel band, the second steel band structural parameter are identical, the second steel band by the time actual temperature should be identical with the first steel band, by setting different heat emissivity coefficients until the second steel band that radiation pyrometer shows is identical with the first temperature of steel strips first passed through, the heat emissivity coefficient that now radiation pyrometer is set is the heat emissivity coefficient of the second steel band.The present invention has realized the stable annealing furnace annealing temperature of controlling in continuous production operation process, has overcome the inaccurate problem of measurement temperature that the steel strip surface heat emissivity coefficient changes and causes when producing the higher high-strength steel of alloying element.
The accompanying drawing explanation
Fig. 1 for the embodiment of the present invention provide a kind of for measuring the method process flow sheet of steel band heat emissivity coefficient.
Embodiment
Below in conjunction with accompanying drawing, embodiment provided by the invention is described in further detail.
Referring to Fig. 1, what the embodiment of the present invention provided is a kind of for measuring the method for steel band heat emissivity coefficient, specifically comprises the steps:
Step S101: choose the first steel band of known heat emissivity coefficient by annealing furnace, record annealing temperature T
1;
Step S102: choose the second steel band of heat emissivity coefficient to be measured by annealing furnace, record annealing temperature T
2;
Step S103: adjust annealing temperature T
2numerical value, realize T
2=T
1;
Step S104: record T
2=T
1the time the second steel band the heat emissivity coefficient observed value;
Wherein, the first steel band, the second steel band structural parameter are identical.
Preferably, the first steel band is soft steel, and the second steel band is high-strength steel.And the first steel band, the second steel band structural parameter comprise: thickness of strips and/or width of steel band.
In the present embodiment, step S101 is the heat emissivity coefficient according to the first steel band by radiation pyrometer, records annealing temperature T
1.
In the present embodiment, step S102 sets different heat emissivity coefficients by radiation pyrometer to the second steel band, and then realizes T
2=T
1.
Simultaneously, identical for guaranteeing the first steel band, the second steel band actual environment temperature in measuring process, in step S101, step S102, the annealing furnace temperature remains constant.
Below, by measuring the heat emissivity coefficient of 780 ℃ of lower DP780D+Z steel bands of annealing temperature, select the design parameter example to be described in further detail for the method for measuring the steel band heat emissivity coefficient provided by the invention, to support technical problem to be solved by this invention:
1, choosing heat emissivity coefficient is 0.33 for cold-rolled low carbon steel band DC51D+Z and cold-rolled low carbon steel band DP780D+Z to be measured;
2, control 780 ℃ of annealing furnace annealing temperatures;
3, steel band DC51D+Z is passed through to annealing furnace, recording annealing temperature is 780 ℃;
4, steel band DP780D+Z is passed through to annealing furnace, now at the radiation pyrometer heat emissivity coefficient, being set as measuring steel band DP780D+Z temperature at 0.33 o'clock is 810 ℃;
5, change radiation pyrometer heat emissivity coefficient set(ting)value 0.34-0.43, when heat emissivity coefficient changes to 0.4, radiation pyrometer display measurement temperature is 780 ℃;
6, the heat emissivity coefficient of determining steel band DP780D+Z is 0.4.
Wherein, selected steel band DC51D+Z, steel band DP780D+Z are thickness 1.0mm, each volume of the steel band of width 1200mm.
Provided by the invention a kind of for measuring the method for steel band heat emissivity coefficient, in the actual measurement working process, by keeping annealing furnace temperature-resistant, use first steel band (soft steel) of same size successively to pass through annealing furnace with the second steel band (high-strength steel), and record corresponding annealing temperature and radiation coefficient, when the second steel band (high-strength steel) while passing through, due to the first steel band, the second steel band structural parameter are identical, and the annealing furnace temperature does not change, the second steel band (high-strength steel) by the time actual temperature should be identical with the first steel band (soft steel), by setting different heat emissivity coefficients until the second steel band (high-strength steel temperature) that radiation pyrometer shows is identical with the first steel band (soft steel) temperature of first passing through, the heat emissivity coefficient that now radiation pyrometer is set is the heat emissivity coefficient of the second steel band (high-strength steel).The present invention has realized in continuous production operation process, be the stable annealing furnace annealing temperature of controlling while after soft steel, connecing high-strength steel, overcome when producing the higher high-strength steel of the alloying element steel strip surface heat emissivity coefficient inaccurate problem of measurement temperature that (with ordinary low-carbon steel, differing larger) cause that changes.And the present invention also has characteristics simple in structure, easy to operate, that measuring accuracy is high.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to example, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (6)
1. one kind for measuring the method for steel band heat emissivity coefficient, it is characterized in that, comprising:
Choose the first steel band of known heat emissivity coefficient by annealing furnace, record annealing temperature T
1;
Choose the second steel band of heat emissivity coefficient to be measured by annealing furnace, record annealing temperature T
2;
Adjust described annealing temperature T
2numerical value, realize T
2=T
1;
Record T
2=T
1the heat emissivity coefficient observed value of Shi Suoshu the second steel band;
Wherein, described the first steel band, described the second steel band structural parameter are identical.
2. according to claim 1 for measuring the method for steel band heat emissivity coefficient, described adjustment annealing temperature T
2numerical value comprise:
By radiation pyrometer, described the second steel band is set to different heat emissivity coefficients, and then realize T
2=T
1.
3. according to claim 1 for measuring the method for steel band heat emissivity coefficient, it is characterized in that:
Described structural parameter comprise: thickness of strips and/or width of steel band.
4. according to claim 1 for measuring the method for steel band heat emissivity coefficient, it is characterized in that:
Described the first steel band is soft steel.
5. according to claim 1 for measuring the method for steel band heat emissivity coefficient, it is characterized in that:
Described the second steel band is high-strength steel.
6. according to claim 1 for measuring the method for steel band heat emissivity coefficient, it is characterized in that:
The temperature of described annealing furnace remains unchanged.
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|---|---|---|---|
| CN201310373534.4A CN103436688B (en) | 2013-08-23 | 2013-08-23 | For measuring the method for steel band heat emissivity coefficient |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373534.4A CN103436688B (en) | 2013-08-23 | 2013-08-23 | For measuring the method for steel band heat emissivity coefficient |
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| CN103436688A true CN103436688A (en) | 2013-12-11 |
| CN103436688B CN103436688B (en) | 2015-09-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113591276A (en) * | 2021-07-08 | 2021-11-02 | 首钢智新迁安电磁材料有限公司 | Method and system for obtaining radiation coefficient of strip steel of annealing furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201053908Y (en) * | 2007-06-19 | 2008-04-30 | 宝山钢铁股份有限公司 | Horizontal type continuous annealing oven radiation metal temperature meter calibration device |
| CN101487745A (en) * | 2009-02-18 | 2009-07-22 | 中冶赛迪工程技术股份有限公司 | Radiant panel thermometer detection apparatus and method for continuous annealing furnace |
| CN201358284Y (en) * | 2009-02-27 | 2009-12-09 | 宝山钢铁股份有限公司 | Strip steel temperature measurement roller for continuous annealing furnace |
-
2013
- 2013-08-23 CN CN201310373534.4A patent/CN103436688B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201053908Y (en) * | 2007-06-19 | 2008-04-30 | 宝山钢铁股份有限公司 | Horizontal type continuous annealing oven radiation metal temperature meter calibration device |
| CN101487745A (en) * | 2009-02-18 | 2009-07-22 | 中冶赛迪工程技术股份有限公司 | Radiant panel thermometer detection apparatus and method for continuous annealing furnace |
| CN201358284Y (en) * | 2009-02-27 | 2009-12-09 | 宝山钢铁股份有限公司 | Strip steel temperature measurement roller for continuous annealing furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113591276A (en) * | 2021-07-08 | 2021-11-02 | 首钢智新迁安电磁材料有限公司 | Method and system for obtaining radiation coefficient of strip steel of annealing furnace |
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| CN103436688B (en) | 2015-09-30 |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |
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