CN212404188U - High magnetic induction oriented silicon steel production line - Google Patents
High magnetic induction oriented silicon steel production line Download PDFInfo
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- CN212404188U CN212404188U CN202020844661.3U CN202020844661U CN212404188U CN 212404188 U CN212404188 U CN 212404188U CN 202020844661 U CN202020844661 U CN 202020844661U CN 212404188 U CN212404188 U CN 212404188U
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Abstract
The utility model discloses a high magnetic induction grain-oriented silicon steel production line, which comprises a continuous casting mechanism, a hot rolling mechanism, a pickling mechanism, a cold rolling mechanism, a decarburization mechanism and an annealing mechanism which are connected in sequence; the decarburization mechanism is composed of a decarburization and nitridation device of a continuous annealing furnace; the output end of the decarburization mechanism is provided with a magnesium oxide coating mechanism; the annealing mechanism is composed of a hood-type annealing unit. The utility model discloses a high magnetic induction oriented silicon steel production line improves the process behind the high magnetic induction oriented silicon steel of production to all control according to the requirement every technological control key point that can influence surface color difference, surface color difference improves very obviously.
Description
Technical Field
The utility model relates to a high magnetic induction oriented silicon steel processing line, concretely relates to high magnetic induction oriented silicon steel production line belongs to high magnetic induction oriented silicon steel surface colour difference and improves production line technical field.
Background
The silicon content of the oriented silicon steel is about 3 percent (mass fraction), the oriented silicon steel consists of single Gauss oriented ({ 110} <001 >) crystal grains, the magnetic induction is very high and the iron loss is very low when the oriented silicon steel is magnetized along the rolling direction, and the oriented silicon steel is mainly used for producing transformer cores; according to the magnetic induction, the oriented silicon steel products can be divided into two types of common oriented silicon steel (CGO) and high magnetic induction oriented silicon steel (Hi-B), and the high magnetic induction oriented silicon steel has higher magnetic induction and lower iron loss; in the existing processing process of the high-magnetic-induction oriented silicon steel, because the air permeability of a steel coil during high-temperature annealing is influenced by the plate shape difference, the middle wave and the secondary wave are serious, the requirement on the control range of the oxygen content in the decarburization process is low, because the ratio of Fe2SiO4/SiO2 is directly influenced by the oxygen content, when Fe2SiO4/SiO2= 0.05-0.45, a good bottom layer is formed, when Fe2SiO4/SiO2 is more than 0.45, a plurality of bright points are generated, and when Fe2SiO4/SiO2 is less than 0.05, the bottom layer is damaged and uneven; the reason why the treatment of the combined water is not thorough in the high-temperature annealing process is that the d.p value is above zero before 650 ℃ during high-temperature annealing, which indicates that the combined water is seriously remained and damages the formation of a bottom layer when the temperature is raised to 950-1150 ℃.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a high magnetic induction oriented silicon steel production line improves the process behind the high magnetic induction oriented silicon steel of production to all control according to the requirement every technological control key point that can influence surface colour difference, surface colour difference improves very obviously.
The utility model discloses a high magnetic induction grain-oriented silicon steel production line, which comprises a continuous casting mechanism, a hot rolling mechanism, a pickling mechanism, a cold rolling mechanism, a decarburization mechanism and an annealing mechanism which are connected in sequence; the decarburization mechanism is composed of a decarburization and nitridation device of a continuous annealing furnace; the output end of the decarburization mechanism is provided with a magnesium oxide coating mechanism; the annealing mechanism consists of a cover type annealing unit; firstly, in the process of rolling to the thickness of a finished product at one time, rolling to the required thickness by the aid of set front and rear tension and auxiliary setting of a thickness gauge and a plate shape gauge through 6 passes of process setting, and enabling the plate shape to reduce the defects of secondary rib waves, middle waves and the like as much as possible by adjusting the front and rear tension, the convexity roller shape and the concentration of emulsion in the rolling process; secondly, controlling the carbon content within 30ppm, the oxygen content between 450 and 550ppm and the nitriding amount to be about 200ppm by a decarburization and nitriding process, coating magnesium oxide with the surface of about 6g/m2 and controlling the water content within 3 percent; and finally, controlling the temperature rise, the heat preservation temperature and the time during high-temperature cover annealing, adjusting the proportion and the flow rate of N2, H2 and AX gas introduced corresponding to each temperature stage through a flow valve, discharging the compound water before the temperature of the steel coil is 600 ℃ in the process of temperature rise, heat preservation and temperature reduction, forming secondary crystal grains at 950-1050 ℃, passing through a bottom layer of 2Mg + SiO2= Mg2SiO4, carrying out purification annealing in the process of heat preservation at 1200 ℃, removing sulfur and nitrogen in the steel, and simultaneously ensuring that the secondary crystal grains swallow and disperse residual primary crystal grains, the secondary crystal grain structure is more complete and the crystal boundary is smoother.
Further, the cold rolling mechanism is a 6-pass rolling line, and the cold rolling mechanism is provided with a front-back tension meter, a thickness meter and a plate shape meter.
Furthermore, the magnesium oxide coating mechanism comprises a coating double roller, a spray head arranged above the coating double roller and a hopper body arranged below the coating double roller.
Furthermore, the hood-type annealing unit is respectively connected with high-purity N2, H2 and AX gas pipelines through flow valves; high-purity N2, H2 and AX protective gas are adopted to ensure the purity of the protective gas, and the phenomenon that the formation of a bottom layer is influenced to influence the surface quality to generate chromatic aberration is avoided; h2 is both a shielding gas and a purified steel gas.
Compared with the prior art, the utility model discloses a high magnetic induction oriented silicon steel production line improves the process behind the high magnetic induction oriented silicon steel of production to all control according to the requirement with every technological control key point that can influence surface color difference, surface color difference improves very obviously.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
Example 1:
the high magnetic induction grain-oriented silicon steel production line shown in fig. 1 comprises a continuous casting mechanism, a hot rolling mechanism, an acid washing mechanism, a cold rolling mechanism, a decarburization mechanism and an annealing mechanism which are connected in sequence; the decarburization mechanism is composed of a decarburization and nitridation device of a continuous annealing furnace; the output end of the decarburization mechanism is provided with a magnesium oxide coating mechanism; the annealing mechanism consists of a cover type annealing unit; firstly, in the process of rolling to the thickness of a finished product at one time, rolling to the required thickness by the aid of set front and rear tension and auxiliary setting of a thickness gauge and a plate shape gauge through 6 passes of process setting, and enabling the plate shape to reduce the defects of secondary rib waves, middle waves and the like as much as possible by adjusting the front and rear tension, the convexity roller shape and the concentration of emulsion in the rolling process; secondly, controlling the carbon content within 30ppm, the oxygen content between 450 and 550ppm and the nitriding amount to be about 200ppm by a decarburization and nitriding process, coating magnesium oxide with the surface of about 6g/m2 and controlling the water content within 3 percent; and finally, controlling the temperature rise, the heat preservation temperature and the time during high-temperature cover annealing, adjusting the proportion and the flow rate of N2, H2 and AX gas introduced corresponding to each temperature stage through a flow valve, discharging the compound water before the temperature of the steel coil is 600 ℃ in the process of temperature rise, heat preservation and temperature reduction, forming secondary crystal grains at 950-1050 ℃, passing through a bottom layer of 2Mg + SiO2= Mg2SiO4, carrying out purification annealing in the process of heat preservation at 1200 ℃, removing sulfur and nitrogen in the steel, and simultaneously ensuring that the secondary crystal grains swallow and disperse residual primary crystal grains, the secondary crystal grain structure is more complete and the crystal boundary is smoother.
The cold rolling mechanism is a 6-pass rolling line, and the cold rolling mechanism is provided with a front-back tension meter, a thickness meter and a plate shape meter. The magnesium oxide coating mechanism comprises a coating double roller, a spray head arranged above the upper roller of the coating double roller and a hopper body arranged below the upper roller of the coating double roller. The hood-type annealing unit is respectively connected with high-purity N2, H2 and AX gas pipelines through flow valves; high-purity N2, H2 and AX protective gas are adopted to ensure the purity of the protective gas, and the phenomenon that the formation of a bottom layer is influenced to influence the surface quality to generate chromatic aberration is avoided; h2 is both a shielding gas and a purified steel gas.
The above-mentioned embodiment is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles of the present invention are included in the claims of the present invention.
Claims (4)
1. A high magnetic induction grain-oriented silicon steel production line comprises a continuous casting mechanism, a hot rolling mechanism, a pickling mechanism, a cold rolling mechanism, a decarburization mechanism and an annealing mechanism which are connected in sequence; the method is characterized in that: the decarburization mechanism is composed of a decarburization and nitridation device of a continuous annealing furnace; the output end of the decarburization mechanism is provided with a magnesium oxide coating mechanism; the annealing mechanism is composed of a hood-type annealing unit.
2. The high magnetic induction grain-oriented silicon steel production line of claim 1, wherein: the cold rolling mechanism is a 6-pass rolling line, and the cold rolling mechanism is provided with a front tension meter, a rear tension meter, a thickness gauge and a plate shape gauge.
3. The high magnetic induction grain-oriented silicon steel production line of claim 1, wherein: the magnesium oxide coating mechanism comprises a coating double roller, a spray head arranged above the upper roller of the coating double roller and a hopper body arranged below the upper roller of the coating double roller.
4. The high magnetic induction grain-oriented silicon steel production line of claim 1, wherein: the hood-type annealing unit is respectively connected with high-purity N2, H2 and AX gas pipelines through flow valves.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020844661.3U CN212404188U (en) | 2020-05-20 | 2020-05-20 | High magnetic induction oriented silicon steel production line |
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| CN202020844661.3U CN212404188U (en) | 2020-05-20 | 2020-05-20 | High magnetic induction oriented silicon steel production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115518983A (en) * | 2022-10-12 | 2022-12-27 | 海安华诚新材料有限公司 | Finished product effectual oriented silicon steel finished product preparation equipment |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115518983A (en) * | 2022-10-12 | 2022-12-27 | 海安华诚新材料有限公司 | Finished product effectual oriented silicon steel finished product preparation equipment |
| CN115518983B (en) * | 2022-10-12 | 2023-11-14 | 海安华诚新材料有限公司 | Oriented silicon steel finished product preparation equipment |
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