CN103331302A - Device and method for improving finishing temperature of oriented silicon steel - Google Patents
Device and method for improving finishing temperature of oriented silicon steel Download PDFInfo
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- CN103331302A CN103331302A CN2013102912407A CN201310291240A CN103331302A CN 103331302 A CN103331302 A CN 103331302A CN 2013102912407 A CN2013102912407 A CN 2013102912407A CN 201310291240 A CN201310291240 A CN 201310291240A CN 103331302 A CN103331302 A CN 103331302A
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Abstract
The invention relates to a device and method for improving a finishing temperature of oriented silicon steel. The device comprises two hot mill rails, a steel template and a heat insulation plate are arranged on the hot mill rails, the steel template is arranged on the hot mill rails along the hot mill rails, the two sides of the steel template are bent downward to form side plates, the two hot mill rails are clamped between the two side plates, the two ends of the steel template are bent downward to form baffles, the two hot mill rails are clamped between the two baffles at the two ends of the steel template, the heat insulation plate is arranged on the steel template, and the heat insulation plate is fixed on the steel template through pressing strips. The method includes the step of enabling a forging stock to keep making contact with the heat insulation plate which is fixed on the hot mill rails. Through the device and method for improving the finishing temperature of the oriented silicon steel, the average finishing temperature of hot rolled plates is increased from 865 DEG C to 901 DEG C, the average magnetic induction intensity is increased from 1.865T to 1.895T, and the product percent of pass is increased from 52% to 93%.
Description
Technical field
The present invention relates to a kind of devices and methods therefor that improves the orientation silicon steel finishing temperature.
Background technology
Especially low-temperature heat of orientation silicon steel (1150 ℃～1250 ℃) orientation silicon steel is that temperature is high as far as possible to the requirement of finishing temperature, and the raising finishing temperature is recrystallization and the grain growth in order to promote hot rolled plate.Low-temperature heat, high-temperature final rolling be difficult point and the weak link of low-temperature heating oriented silicon steel hot rolling technology just.In order to guarantee finishing temperature and uniformity thereof, the prior art scheme is to increase intermediate blank thickness, perhaps at hot rolling line induction type limit portion heater is installed.Increase the restriction that intermediate blank thickness is subjected to milling train finish rolling ability, in order to guarantee hot rolled plate plate shape and final products magnetic property, the hot rolling reduction ratio also has the certain limit restriction simultaneously, and it is very limited that intermediate blank thickness increases scope.Therefore, increase the method narrow application range that intermediate blank thickness guarantees the orientation silicon steel hot rolling finishing temperature, especially be not suitable for the thinner orientation silicon steel of final products, as 0.23mm, 0.20mm and 0.18mm product.At hot rolling line induction type limit portion heater is installed, for improving finishing temperature and guaranteeing that temperature has certain effect along hot rolled plate cross direction profiles uniformity, but this plant investment height especially is not suitable for the low profile thermal milling equipment of small-sized orientation silicon steel factory or scientific research institutions.
Summary of the invention
In order to overcome the existing above-mentioned deficiency that improves the device of orientation silicon steel finishing temperature, it is low to the invention provides a kind of production cost, the device of raising orientation silicon steel finishing temperature simple in structure.A kind of method that improves the orientation silicon steel finishing temperature is provided simultaneously.
Design of the present invention is to utilize that heat-barrier material (as asbestos) is heat-resisting, the characteristics of poor thermal conductivity, at hot-rolling mill track upper berth thermal insulation board, under the prerequisite that does not influence hot rolling technology execution and plate shape, satisfied the hot rolling technology requirement of orientation silicon steel low-temperature heat, high-temperature final rolling, the temperature of having avoided the milling train track to contact with hot rolled plate simultaneously causing has guaranteed the uniformity of hot rolling finishing temperature along the inhomogeneous problem of hot rolled plate cross direction profiles.Thermal insulation board must be fixed on the steel form that can play a supporting role and be complementary with the hot-rolling mill track, the stainless steel cold-rolled plate of heat-resisting, easy processing that steel form is selected for use, thickness 2 ~ 4mm.
The device of this raising orientation silicon steel finishing temperature comprises two hot-rolling mill tracks, it is characterized in that: steel form and thermal insulation board are installed on the hot-rolling mill track, the material of steel form is the cold-reduced sheet of thickness 2 ~ 4mm, steel form is installed (button) as the gripper shoe of thermal insulation board on the hot-rolling mill track along the hot-rolling mill track, the both sides of steel form are converted into side plate downwards, two hot-rolling mill tracks are stuck between two side plates, two ends at steel form are bent into baffle plate downwards, the rarest baffle plate of each end, two hot rolling tracks are stuck between the baffle plate at two ends.(button) thermal insulation board is installed on steel form, and the width of thermal insulation board is not more than steel form (width) 10mm, and thermal insulation board is fixed on the steel form with press strip, and two ends and the steel form of press strip weld together.
The device of above-mentioned raising orientation silicon steel finishing temperature is characterized in that: the material stainless steel cold-rolled plate of described steel form.
The device of above-mentioned raising orientation silicon steel finishing temperature is characterized in that: described thermal insulation board is that thickness is asbestos board or the micarex of 3-5mm.
The device of above-mentioned raising orientation silicon steel finishing temperature is characterized in that: described thermal insulation board is that thickness is asbestos board or the micarex of 3-4mm.
The method of this raising orientation silicon steel finishing temperature be forging stock in course of hot rolling, all the time be fixed on the hot-rolling mill track above thermal insulation board directly contact.Thermal insulation board is to be fixed together by steel form and the hot-rolling mill track installed on (being buckled in) hot-rolling mill track.
The method of above-mentioned raising orientation silicon steel finishing temperature is characterized in that: described thermal insulation board is that thickness is asbestos board or the micarex of 3-5mm.
The temperature that method of the present invention has been avoided hot-rolling mill bar shaped track and hot rolled plate directly to contact causing has guaranteed the uniformity of hot rolling finishing temperature along the inhomogeneous problem of hot rolled plate cross direction profiles.Simultaneously, hot rolled plate directly contacts with the track of band heat-barrier material, has reduced hot conduction, has satisfied the hot rolling technology requirement of orientation silicon steel low-temperature heat, high-temperature final rolling.
Beneficial effect of the present invention
Can improve finishing temperature, finishing temperature is obviously improved along hot rolled plate cross direction profiles uniformity, and corresponding final products magnetic property disqualification rate reduces.According to orientation silicon steel magnetic strength and the test of hot rolling finishing temperature relation, iron loss and hot rolling finishing temperature relation, the test of product percent of pass, the structure that adopts track to cover with the thermal insulation board shop, average finishing temperature is brought up to 901 ℃ from 865 ℃, average magnetic induction intensity is brought up to 1.895T from 1.865T, and product percent of pass brings up to 93% by 52%.
Description of drawings
Fig. 1 is the vertical view of the device embodiment of this raising orientation silicon steel finishing temperature.
Fig. 2 is the left view corresponding with Fig. 1, and Fig. 1 amplifies relatively, left-handed 90 °, and rail supported base plate partly cut-away.
Fig. 3 is the cutaway view along A among Fig. 1-A line, and Fig. 1 amplifies relatively, left-handed 90 °.
Among the above-mentioned figure
:
1-steel form, 2-asbestos board, 3-press strip, 4-siding track, 5-hot-rolling mill track
6-baffle plate, 7-side plate 8-flat board 9-rail supported base plate.
The specific embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing and embodiment, but the specific embodiment of the present invention is not limited to following embodiment.
Device embodiment
The structure of present embodiment is seen Fig. 1, Fig. 2 and Fig. 3, it is on two hot-rolling mill tracks 5 of ￠ 450 * 350mm two-roller reversible Rapid Thermal milling train, buckle steel form 1 as the gripper shoe of the asbestos board 2 of thermal insulation board along hot-rolling mill track 5, the both sides of steel form 1 are converted into side plate 7 downwards, dull and stereotyped 8 cover on two hot-rolling mill tracks 5 above, two hot-rolling mill tracks 5 are stuck between two side plates 7, two ends at steel form 1 are bent into baffle plate 6 downwards, each end has two baffle plates 6, the two ends of each root hot-rolling mill track 5 respectively have 6, two hot-rolling mill tracks 5 of a baffle plate to be stuck between four baffle plates 6.The asbestos board 2 that width equates with steel form 1 is installed on steel form 1, and asbestos board 2 usefulness press strips 3 are fixed on steel form 1, and the two ends of press strip 3 and steel form 1 weld together.
The steel form 1 of present embodiment is that the thickness of asbestos board 2 is 3mm with the stainless steel cold-rolled plate of thickness 2mm.
Method embodiment
The mass percent of C, Si, Mn, Als, N and the Cr of the orientation silicon steel forging stock of the following examples hot rolling is:
C 0.053％； Si 3.45％； Mn 0.12％； Als 0.028％；
N 0.0078％； Cr 0.12％；
The length of orientation silicon steel forging stock is 110mm, and thickness is 35mm, and it is thick to be hot-rolled down to 2.02mm.
Forging stock is in the operation of rolling, all the time be fixed on hot-rolling mill track 5 above asbestos board 2 directly contact, the temperature of having avoided hot-rolling mill track 5 and hot rolled plate directly to contact causing has guaranteed the uniformity of hot rolling finishing temperature along the inhomogeneous problem of hot rolled plate cross direction profiles.Simultaneously, satisfied the hot rolling technology requirement of orientation silicon steel low-temperature heat, high-temperature final rolling.
It is thick to adopt the once cold rolling method to be cold-rolled to 0.23mm after regular practice is handled, and after operations such as decarburizing annealing, nitriding, high annealing, finished product detects through epstein frame, and five embodiment of the present invention and three comparative examples' magnetic property and qualification rate see Table 1.
Table 1
| Embodiment | Track structure | Finishing temperature (℃) | Magnetic induction intensity (T) |
| | Track is installed with asbestos board | 896 | 1.885 |
| | Track is installed with asbestos board | 898 | 1.887 |
| | Track is installed with asbestos board | 901 | 1.890 |
| | Track is installed with asbestos board | 903 | 1.901 |
| | Track is installed with asbestos board | 905 | 1.910 |
| Comparative example 1 | Track does not have asbestos board | 863 | 1.864 |
| Comparative example 2 | Track does not have asbestos board | 865 | 1.866 |
| Comparative example 3 | Track does not have asbestos board | 866 | 1.865 |
Claims (6)
1. device that improves the orientation silicon steel finishing temperature, it comprises two hot-rolling mill tracks, it is characterized in that:
Steel form and thermal insulation board are installed on the hot-rolling mill track, the material of steel form is the cold-reduced sheet of thickness 2 ~ 4mm, steel form is installed on the hot-rolling mill track along the hot-rolling mill track as the gripper shoe of thermal insulation board, the both sides of steel form are converted into side plate downwards, two hot-rolling mill tracks are stuck between two side plates, two ends at steel form are bent into baffle plate downwards, the rarest baffle plate of each end, and two hot rolling tracks are stuck between the baffle plate at two ends; Thermal insulation board is installed on steel form, and the width of thermal insulation board is not more than steel form 10mm, and thermal insulation board is fixed on the steel form with press strip.
2. the device of raising orientation silicon steel finishing temperature according to claim 1 is characterized in that: the material stainless steel cold-rolled plate of described steel form.
3. the device of raising orientation silicon steel finishing temperature according to claim 1 and 2, it is characterized in that: described thermal insulation board is that thickness is asbestos board or the micarex of 3-5mm.
4. the device of raising orientation silicon steel finishing temperature according to claim 3, it is characterized in that: described thermal insulation board is that thickness is asbestos board or the micarex of 3-4mm.
5. method that improves the orientation silicon steel finishing temperature, it be forging stock in course of hot rolling, all the time be fixed on the hot-rolling mill track above thermal insulation board directly contact.
6. the method for raising orientation silicon steel finishing temperature according to claim 5, it is characterized in that: described thermal insulation board is that thickness is asbestos board or the micarex of 3-5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310291240.7A CN103331302B (en) | 2013-07-12 | 2013-07-12 | Device and method for improving finishing temperature of oriented silicon steel |
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| CN201310291240.7A CN103331302B (en) | 2013-07-12 | 2013-07-12 | Device and method for improving finishing temperature of oriented silicon steel |
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| CN103331302B CN103331302B (en) | 2015-07-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107597843A (en) * | 2017-07-31 | 2018-01-19 | 山西太钢不锈钢股份有限公司 | The method for rolling stainless steel hot plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463585A (en) * | 1977-05-04 | 1984-08-07 | Laws William R | Heat shield arrangement for a rolling mill |
| JPH0225212A (en) * | 1988-07-12 | 1990-01-26 | Sumitomo Metal Ind Ltd | Heat keeping method for high temperature steel material carrying line |
| CN1743127A (en) * | 2005-09-29 | 2006-03-08 | 东北大学 | Method for producing oriented silicon steel band by continuous casting and rolling of thin plate slab |
| CN101939119A (en) * | 2008-01-17 | 2011-01-05 | Ihi金属生产设备科技株式会社 | Carrying apparatus and hot-rolling apparatus, and carrying method and hot-rolling method |
| CN102102141A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Hot rolling process for improving structural homogeneity of oriented silicon steel plate |
-
2013
- 2013-07-12 CN CN201310291240.7A patent/CN103331302B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463585A (en) * | 1977-05-04 | 1984-08-07 | Laws William R | Heat shield arrangement for a rolling mill |
| JPH0225212A (en) * | 1988-07-12 | 1990-01-26 | Sumitomo Metal Ind Ltd | Heat keeping method for high temperature steel material carrying line |
| CN1743127A (en) * | 2005-09-29 | 2006-03-08 | 东北大学 | Method for producing oriented silicon steel band by continuous casting and rolling of thin plate slab |
| CN101939119A (en) * | 2008-01-17 | 2011-01-05 | Ihi金属生产设备科技株式会社 | Carrying apparatus and hot-rolling apparatus, and carrying method and hot-rolling method |
| CN102102141A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Hot rolling process for improving structural homogeneity of oriented silicon steel plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107597843A (en) * | 2017-07-31 | 2018-01-19 | 山西太钢不锈钢股份有限公司 | The method for rolling stainless steel hot plate |
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