CN111321369A - Ion nitriding device and ion nitriding method for oriented silicon steel production - Google Patents
Ion nitriding device and ion nitriding method for oriented silicon steel production Download PDFInfo
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- CN111321369A CN111321369A CN202010146110.4A CN202010146110A CN111321369A CN 111321369 A CN111321369 A CN 111321369A CN 202010146110 A CN202010146110 A CN 202010146110A CN 111321369 A CN111321369 A CN 111321369A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
- C23C8/38—Treatment of ferrous surfaces
Abstract
The invention provides an ion nitriding device for oriented silicon steel production, which is applied to the technical field of metallurgy, and also relates to an ion nitriding method for oriented silicon steel production, wherein an inlet (2) and an outlet (3) are arranged on a nitriding furnace (1) of the ion nitriding device for oriented silicon steel production, an inlet conductive sealing roller (4) is arranged in the nitriding furnace (1) and close to the inlet (2), an outlet conductive sealing roller (5) is arranged in the nitriding furnace (1) and close to the outlet (3), an electrode (6) is also arranged in the nitriding furnace (1), the inlet conductive sealing roller (4), the outlet conductive sealing roller (5) and the electrode (6) are respectively connected with a power supply (7), the ion nitriding device for oriented silicon steel production realizes the purpose of nitrogen ionization in the process of nitriding and nitriding oriented silicon steel in a continuous production line, the rapid ion nitriding is achieved, the nitriding quality is stable, and the problem that the processing quality of the existing steel belt is influenced is effectively solved.
Description
Technical Field
The invention belongs to the technical field of metallurgy, particularly relates to the technical field of processing devices and processing methods for electrical steel production, and more particularly relates to an ion nitriding device for oriented silicon steel production.
Background
The oriented electrical steel strip is produced by smelting qualified molten steel through a converter and RH, continuously casting the molten steel into thick steel billets, and hot-rolling and thinning the thick steel billets to a thickness suitable for cold rolling through high-temperature heating. The hot rolled steel strip is subjected to normalizing, shot blasting, acid pickling, cold rolling, decarburization annealing, coating, long-period high-temperature annealing (1200 ℃), and hot drawing leveling to obtain a magnetic material with very low longitudinal iron loss and very high magnetic induction. Generally, in order to obtain magnetic properties of an oriented electrical steel strip having very low longitudinal iron loss and very high magnetic induction, under conditions where chemical composition control is very strict (endogenous inhibitors), the steel strip is heated to 1300 ℃ or more or about 1200 ℃ by hot rolling, and before final high-temperature annealing, an external inhibitor (nitriding) is introduced, thereby obtaining a great improvement in longitudinal magnetic properties. Nitriding methods generally include gas methods, solid methods, and ion methods, all of which are long-cycle annealing (over 5 hours) of a workpiece. For electrical steel, in order to simplify the production flow, nitriding is carried out on a continuous annealing production line, a steel strip is very thin (the thickness is 0.15mm-0.30mm generally), the nitriding time is very short, the nitriding quality is difficult to control, and the length of the production line and the control difficulty are increased.
In the prior art, the oriented electrical steel is processed, because of the quality requirement, the thickness is thinner and thinner, and therefore decarburization and nitridation in the production process are finished in a continuous production line. Because the sections of the continuous production line are connected together, the protective atmosphere of oxidation, the decarbonization atmosphere containing moisture and the mixed atmosphere of nitriding hydrogen, nitrogen and ammonia need to be mutually isolated, and the difficulty is very high in order to achieve the function purpose. It is very difficult to maintain the surface activity of the steel strip through a continuous production line. Because the surface cleaning and activation of the steel strip are not considered, the incubation period of nitriding is longer, and a series of problems (or reduction of the running speed of the production line, reduction of the yield and the quality) such as unstable product quality or increase of the length of the production line are caused.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects of the prior art, the ion nitriding device for the oriented silicon steel production is simple in structure, realizes the purpose of nitrogen ionization in the decarburization and nitriding process of the oriented silicon steel (electrical steel) in a continuous production line, achieves quick ion nitriding and stable nitriding quality, effectively solves the problem that the processing quality of steel strips is influenced by long nitriding time and unstable nitriding layer in the existing processing method, and improves the production quality and stability of the steel strips.
To solve the technical problems, the invention adopts the technical scheme that:
the invention relates to an ion nitriding device for producing oriented silicon steel, which comprises a nitriding furnace, wherein an inlet and an outlet are arranged on the nitriding furnace, an inlet conductive sealing roller is arranged in the nitriding furnace close to the inlet, an outlet conductive sealing roller is arranged in the nitriding furnace close to the outlet, an electrode is also arranged in the nitriding furnace, the inlet conductive sealing roller, the outlet conductive sealing roller and the electrode are respectively connected with a power supply, and the silicon steel strip to be treated passes through the nitriding furnace.
The silicon steel strip to be treated is arranged into a structure which can enter the nitriding furnace through an inlet and leave the nitriding furnace through an outlet, the nitriding furnace comprises an ion nitriding cavity, and nitrogen and hydrogen/ammonia are introduced into the ion nitriding cavity.
The electrode is disposed within the ion-nitriding chamber.
The conductive sealing roller of import include the multiunit, every group import conductive sealing roller includes two conductive sealing roller subassemblies, the conductive sealing roller of export include the multiunit, every group export conductive sealing roller includes two conductive sealing roller subassemblies.
The ion nitriding device for oriented silicon steel production further comprises a plurality of reversing rollers, and a to-be-treated silicon steel strip input by the inlet conductive sealing rollers is arranged to sequentially bypass the plurality of reversing rollers and then pass through the outlet conductive sealing rollers to be output.
An inlet non-contact sealing roller is arranged in the nitriding furnace of the ion nitriding device for oriented silicon steel production, close to the inlet, and an outlet non-contact sealing roller is arranged in the nitriding furnace, close to the outlet. The inlet non-contact sealing rollers comprise two sealing rollers and two eccentric rollers, and the outlet non-contact sealing rollers comprise two sealing rollers and two eccentric rollers.
The invention also relates to an ion nitriding method for producing the oriented silicon steel, which has simple steps, realizes the aim of nitrogen ionization in the process of decarburization and nitriding of the oriented silicon steel (oriented electrical steel and electrical steel) in a continuous production line, achieves quick ion nitriding and stable nitriding quality, and effectively solves the problem that the steel strip processing quality is influenced by long nitriding time and unstable nitriding layer in the existing processing method, thereby improving the production quality and stability of the steel strip.
The ion nitriding method for producing the oriented silicon steel comprises the following ion nitriding steps: 1) the silicon steel strip to be treated enters the nitriding furnace through the inlet and leaves the nitriding furnace through the outlet; 2) after entering the inlet, the silicon steel strip to be treated is contacted with the inlet conductive sealing roller and is connected with a power supply; 3) the silicon steel strip to be treated passing through the inlet conductive sealing roller enters an ion nitriding cavity for nitriding; 4) after entering the outlet, the silicon steel strip to be treated after nitriding treatment is contacted with the outlet conductive sealing roller, and the silicon steel strip to be treated is connected with a power supply; 5) so that the silicon steel strip to be treated is output to the outlet to finish the ion nitriding treatment.
When the silicon steel strip to be treated is contacted with the inlet conductive sealing roller, the electrode sequentially forms an electric loop with ionized nitrogen, the silicon steel strip to be treated, the inlet conductive sealing roller and the power supply; when the silicon steel strip to be treated contacts the outlet conductive sealing roller, the electrode sequentially forms an electric loop with ionized nitrogen, the silicon steel strip to be treated, the outlet conductive sealing roller and the power supply.
After the silicon steel strip to be treated enters the ion nitriding cavity, nitrogen and hydrogen/ammonia gas are introduced into the ion nitriding cavity, and the passing steel strip is subjected to rapid nitriding treatment after nitrogen ionization is realized by high voltage under the low vacuum condition.
The silicon steel strip to be treated is a preheated steel strip before entering the nitriding furnace through an inlet, and the preheating temperature of the preheated steel strip is over 1000 ℃.
By adopting the technical scheme of the invention, the following beneficial effects can be obtained:
according to the ion nitriding device and the ion nitriding method for producing the oriented silicon steel, the nitriding furnace is a part for fixing the foundation of other parts and forming vacuum. The silicon steel strip to be treated is preheated when entering the nitriding furnace, has the condition of ion nitriding and is continuously input into the nitriding furnace. The function of the inlet conductive sealing roller is conductive and sealing. The inlet conductive sealing roller part is a steel belt surface cleaning and activating section which is in a low-pressure and full-hydrogen state, and high-temperature gas generates abnormal glow (high voltage) by applying voltage. Under the condition, ionized hydrogen can quickly and efficiently clean and activate the surface of the silicon steel strip to be treated, and preparation is made in advance for quick and uniform nitriding and good quality. The inlet conductive sealing roller simultaneously keeps the surface cleaning and activating sections of the steel strip in a required vacuum state. The ion nitriding cavity is a steel strip ion nitriding section, and after a surface-activated silicon steel strip (steel strip) to be treated enters the ion nitriding cavity, nitrogen and hydrogen/ammonia (one selected from hydrogen and ammonia) are introduced into the ion nitriding cavity, so that nitrogen is ionized by high voltage under low vacuum, and the ionized nitrogen rapidly nitrifies the passing steel strip. And the nitrided steel strip is contacted with the outlet conductive sealing roller, so that the steel strip and a power supply form a loop. Meanwhile, the outlet conductive sealing roller keeps the required vacuum of the ion nitriding section and is isolated from the cooling section. The ion nitriding device for oriented silicon steel production has a simple structure, realizes the purpose of nitrogen ionization in the decarburization and nitriding process of oriented silicon steel (electrical steel) in a continuous production line, achieves quick ion nitriding and stable nitriding quality, and effectively solves the problem that the processing quality of a steel strip is influenced by long nitriding time and unstable nitriding layer in the existing processing method. The ion nitriding device and the ion nitriding method for oriented silicon steel production can effectively ensure the surface activity of the steel belt passing through the ion nitriding device, the steel belt can continuously run, and the required vacuum degree and gas purity can be maintained after the steel belt enters a nitriding section. Can keep the nitrogen ionization stable, realize stable and quick nitriding, and improve the production quality and the production efficiency of the steel belt.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic structural view of an ion nitriding apparatus for oriented silicon steel production according to the present invention;
in the drawings, the reference numbers are respectively: 1. nitriding furnace; 2. an inlet; 3. an outlet; 4. an inlet conductive seal roller; 5. an outlet conductive seal roller; 6. an electrode; 7. a power source; 8. silicon steel strips to be treated; 9. a reversing roller; 10. an inlet non-contact seal roller; 11. an outlet non-contact seal roller; 12. an ion nitriding cavity; 13. a front sealed cavity; 14. and the rear sealing cavity.
Detailed Description
The following detailed description of the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations among the components, the functions and operation principles of the components, will be made by referring to the accompanying drawings and the description of the embodiments:
as shown in the attached drawing 1, the invention relates to an ion nitriding device for oriented silicon steel production, which comprises a nitriding furnace 1, wherein an inlet 2 and an outlet 3 are arranged on the nitriding furnace 1, an inlet conductive sealing roller 4 is arranged in the nitriding furnace 1 at a position close to the inlet 2, an outlet conductive sealing roller 5 is arranged in the nitriding furnace 1 at a position close to the outlet 3, an electrode 6 is also arranged in the nitriding furnace 1, the inlet conductive sealing roller 4, the outlet conductive sealing roller 5 and the electrode 6 are respectively connected with a power supply 7, and a silicon steel strip 8 to be processed passes through the nitriding furnace 1. Above-mentioned structure adopts brand-new thinking and scheme, improves the structure that is used for the ion nitriding device of oriented silicon steel production for nitriding furnace 1 is inside to form ion nitriding cavity 12, makes pending silicon steel strip 8 get into nitriding furnace 1 through import 2, leaves the whole in-process of nitriding furnace 1 through export 3, and nitriding distance and nitriding time are lengthened, improve the nitriding effect. The ion nitriding device for oriented silicon steel production is a complete sealing system, an air supply system, a vacuum system and a power supply system (ion nitriding). Meanwhile, the steel strip 8 to be treated can continuously pass through an ion nitriding device for oriented silicon steel production. The nitriding furnace 1 is a base for fixing other parts and a part for forming a vacuum. The silicon steel strip 8 to be treated is preheated when entering the nitriding furnace, has the condition of ion nitriding and is continuously input into the nitriding furnace. The function of the inlet conductive sealing roller 4 is conductive and sealing. The part of the inlet conductive sealing roller 4 is a steel belt surface cleaning and activating section which is in a low-pressure and full-hydrogen state, and high-temperature gas generates abnormal glow (high voltage) by applying voltage. Under the condition, ionized hydrogen can quickly and efficiently clean and activate the surface of the silicon steel strip 8 to be treated, so that preparation is made in advance for quick and uniform nitriding and good quality. The inlet conductive sealing roller 4 simultaneously keeps the surface cleaning and activating section of the steel strip in a required vacuum state. The ion nitriding cavity 12 is a steel strip ion nitriding section, and after the surface-activated silicon steel strip 8 (steel strip) to be treated enters the ion nitriding cavity, nitrogen and hydrogen/ammonia (one selected from hydrogen and ammonia) are introduced into the ion nitriding cavity, so that nitrogen is ionized by high voltage under low vacuum, and the ionized nitrogen rapidly nitrifies the passing steel strip. And the nitrided steel strip is contacted with the outlet conductive sealing roller 5, so that the steel strip and a power supply form a loop. Meanwhile, the outlet conductive sealing roller 5 keeps the required vacuum of the ion nitriding section, and removes the oxide layer. The ion nitriding device for oriented silicon steel production has a simple structure, realizes the aim of nitrogen ionization in the decarburization and nitriding process of oriented silicon steel (electrical steel) in a continuous production line, achieves quick ion nitriding and stable nitriding quality, and effectively solves the problem that the processing quality of a steel strip is influenced by long nitriding time and unstable nitriding layer in the existing processing method. The ion nitriding device for oriented silicon steel production ensures the surface activity of the steel strip passing through the ion nitriding device, the steel strip can continuously run, and the required vacuum degree and gas purity can be maintained after the steel strip enters a nitriding section. Can keep the nitrogen ionization stable, realize stable and quick nitriding, and improve the production quality and the production efficiency of the steel belt. Finally, the oriented electrical steel with very low longitudinal iron loss and very high magnetic induction can be effectively obtained.
The silicon steel strip 8 to be treated is arranged to be capable of entering the nitriding furnace 1 through the inlet 2 and leaving the nitriding furnace 1 through the outlet 3, the nitriding furnace 1 comprises an ion nitriding cavity 12, and nitrogen and hydrogen/ammonia are introduced into the ion nitriding cavity 12. Above-mentioned structure, pending silicon steel strip 8 gets into the import, and the electrically conductive seal roller 4 in import carries out steel band surface cleaning, activation treatment, and then the steel band gets into ion nitriding cavity 12, carries out ion nitriding treatment, and through the export again, the electrically conductive seal roller 5 in export carries out steel band surface cleaning activation treatment, then exports the nitriding furnace outside.
The inlet conductive sealing rollers 4 comprise a plurality of groups, each group of inlet conductive sealing rollers 4 comprises two conductive sealing roller assemblies, and all or one of the two conductive sealing roller assemblies is driven by a motor to clamp and convey the silicon steel strip 8 to be processed. The outlet conductive seal rollers 5 comprise a plurality of sets, and each set of outlet conductive seal rollers 5 comprises two conductive seal roller assemblies. All or one of the two conductive sealing roller assemblies is driven by a motor to clamp and convey the silicon steel strip 8 to be treated
The ion nitriding device for oriented silicon steel production further comprises a plurality of reversing rollers 9, and the silicon steel strip 8 to be treated input by the inlet conductive sealing roller 4 is arranged to sequentially bypass the plurality of reversing rollers 9 and then output by the outlet conductive sealing roller 5. With the structure, the running direction of the silicon steel strip 8 to be treated in the nitriding furnace can be changed through the reversing roller. The arrangement of the reversing rollers is three, the first reversing roller enables the silicon steel strip 8 to be treated to turn from an inlet to enter the ion nitriding cavity 12, the second reversing roller enables the silicon steel strip 8 to be treated to bypass the ion nitriding cavity 12, and the third reversing roller enables the silicon steel strip 8 to be treated to go from the ion nitriding cavity 12 to an outlet. Thus, the steel strip passes through the ion nitriding chamber 12, i.e. the nitriding process is performed. The steel belt can start nitriding when entering the nitriding section, and the nitriding effect and the nitriding efficiency are effectively improved.
An inlet non-contact sealing roller 10 is arranged in a nitriding furnace 1 of the ion nitriding device for oriented silicon steel production, close to an inlet 2, and an outlet non-contact sealing roller 11 is arranged in the nitriding furnace 1, close to an outlet 3. The inlet non-contact sealing roll 10 includes two sealing rolls and two eccentric rolls, and the outlet non-contact sealing roll 11 includes two sealing rolls and two eccentric rolls. In the above structure, the inlet non-contact sealing roll 10 includes a sealing roll and an eccentric roll. The sealing roller is of a hollow structure, is opposite to the steel strip, is provided with a slit or discontinuous small holes, and discharges hydrogen or nitrogen from the slit or the discontinuous small holes to form a curtain. The distance between the non-contact sealing roll and the steel strip is very small and fixed. When the steel strips with different thicknesses are produced, the distance between the sealing roller and the steel strips is ensured to be fixed through the adjustment of the eccentric roller. The outlet non-contact seal roller 11 includes a seal roller, an eccentric roller. The sealing roller is of a hollow structure, is opposite to the steel strip, is provided with a slit or discontinuous small holes, and discharges hydrogen or nitrogen from the slit or the discontinuous small holes to form a curtain. The distance between the non-contact sealing roll and the steel strip is very small and fixed. When the steel strips with different thicknesses are produced, the distance between the sealing roller and the steel strips is ensured to be fixed through the adjustment of the eccentric roller.
In the structure of the invention, a closed front sealing cavity 13 is formed between the inlet conductive sealing roller 4 and the inlet non-contact sealing roller 10, so that the vacuum degree is ensured to be kept, and the oriented silicon steel can be conveniently cleaned and activated by hydrogen input into the front sealing cavity when passing through the front sealing cavity. And a closed rear seal cavity 14 is formed between the outlet conductive seal roller 5 and the outlet non-contact seal roller 11, so that the vacuum degree is kept, and when the oriented silicon steel passes through the rear seal cavity, an oxide layer on the surface of the electrical steel can be removed through hydrogen input into the front seal cavity.
The invention also relates to an ion nitriding method for producing the oriented silicon steel, which has simple steps, realizes the aim of nitrogen ionization in the process of decarburization and nitriding of the oriented silicon steel (electrical steel) in a continuous production line, achieves quick ion nitriding and stable nitriding quality, and effectively solves the problem that the steel strip processing quality is influenced by long nitriding time and unstable nitriding layer in the existing processing method, thereby improving the production quality and stability of the steel strip.
The ion nitriding method for producing the oriented silicon steel comprises the following ion nitriding steps: 1) the silicon steel strip 8 to be treated enters the nitriding furnace 1 through the inlet 2 and leaves the nitriding furnace 1 through the outlet 3; 2) after entering the inlet 2, the silicon steel strip 8 to be treated is contacted with the inlet conductive sealing roller 4, and the silicon steel strip 8 to be treated is connected with the power supply 7; 3) the silicon steel strip 8 to be treated passing through the inlet conductive sealing roller 4 enters an ion nitriding cavity 12 for nitriding; 4) after entering the outlet 3, the silicon steel strip 8 to be treated after nitriding treatment contacts with the outlet conductive sealing roller 5, and the silicon steel strip 8 to be treated is connected with a power supply 7; 5) so that the silicon steel strip 8 to be treated is output from the outlet 3 to finish the ion nitriding treatment. The method can safely and conveniently realize the high-quality and stable production of the oriented silicon steel strip. 1) The induction period of the nitriding process is reduced to be close to zero, so that the steel strip enters the nitriding section to start the nitriding process. 2) The steel strip can continuously run, and enters a cleaning and activating section after being heated or decarburized, so that the required vacuum degree and gas purity are maintained. 3) The steel strip can continuously run and enters a nitriding section to keep the required vacuum degree and gas purity. Can keep the nitrogen ionization stable, thereby realizing stable and rapid nitriding. 4) Because the nitriding process can be controlled, the nitriding is uniform, the magnetic performance of the product is improved, and the stability is ensured. 5) The production cost is reduced.
When the silicon steel strip 8 to be treated is contacted with the inlet conductive sealing roller 4, the electrode 6 sequentially forms an electric loop with ionized nitrogen, the silicon steel strip 8 to be treated, the inlet conductive sealing roller 4 and the power supply 7; when the silicon steel strip 8 to be treated contacts the outlet conductive sealing roller 5, the electrode 6 sequentially forms an electric loop with ionized nitrogen, the silicon steel strip 8 to be treated, the outlet conductive sealing roller 5 and the power supply 7. After the silicon steel strip 8 to be treated enters the ion nitriding cavity 12, nitrogen and hydrogen/ammonia gas are introduced into the ion nitriding cavity 12, under the condition of low vacuum, nitrogen ionization is realized by high voltage, and then the passing steel strip is subjected to rapid nitriding treatment.
The silicon steel strip 8 to be treated is a preheated steel strip before entering the nitriding furnace 1 through the inlet 2, and the preheating temperature of the preheated steel strip is over 1000 ℃.
According to the ion nitriding device and the ion nitriding method for producing the oriented silicon steel, the nitriding furnace is a part for fixing the foundation of other parts and forming vacuum. The silicon steel strip to be treated is preheated when entering the nitriding furnace, has the condition of ion nitriding and is continuously input into the nitriding furnace. The function of the inlet conductive sealing roller is conductive and sealing. The inlet conductive sealing roller part is a steel belt surface cleaning and activating section which is in a low-pressure and full-hydrogen state, and high-temperature gas generates abnormal glow (high voltage) by applying voltage. Under the condition, ionized hydrogen can quickly and efficiently clean and activate the surface of the silicon steel strip to be treated, and preparation is made in advance for quick and uniform nitriding and good quality. The inlet conductive sealing roller simultaneously keeps the surface cleaning and activating sections of the steel strip in a required vacuum state. The ion nitriding cavity is a steel strip ion nitriding section, and after a surface-activated silicon steel strip (steel strip) to be treated enters the ion nitriding cavity, nitrogen and hydrogen/ammonia (one selected from hydrogen and ammonia) are introduced into the ion nitriding cavity, so that nitrogen is ionized by high voltage under low vacuum, and the ionized nitrogen rapidly nitrifies the passing steel strip. And the nitrided steel strip is contacted with the outlet conductive sealing roller, so that the steel strip and a power supply form a loop. Meanwhile, the outlet conductive sealing roller keeps the required vacuum of the ion nitriding section and is isolated from the cooling section. The ion nitriding device for oriented silicon steel production has a simple structure, realizes the purpose of nitrogen ionization in the decarburization and nitriding process of oriented silicon steel (electrical steel) in a continuous production line, achieves quick ion nitriding and stable nitriding quality, and effectively solves the problem that the processing quality of a steel strip is influenced by long nitriding time and unstable nitriding layer in the existing processing method. The ion nitriding device and the ion nitriding method for oriented silicon steel production can effectively ensure the surface activity of the steel belt passing through the ion nitriding device, the steel belt can continuously run, and the required vacuum degree and gas purity can be maintained after the steel belt enters a nitriding section. Can keep the nitrogen ionization stable, realize stable and quick nitriding, and improve the production quality and the production efficiency of the steel belt.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, changes and equivalents of the embodiments of the invention, and its application to other applications without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides an ionic nitriding device for oriented silicon steel production which characterized in that: including nitriding furnace (1), nitriding furnace (1) on set up import (2) and export (3), be close to import (2) position in nitriding furnace (1) and set up import electrically conductive seal roller (4), be close to export (3) position in nitriding furnace (1) and set up export electrically conductive seal roller (5), still set up electrode (6) in nitriding furnace (1), import electrically conductive seal roller (4) and export electrically conductive seal roller (5), electrode (6) are connected with power (7) respectively, pending silicon steel strip (8) through nitriding furnace (1).
2. The ion nitriding apparatus for oriented silicon steel production of claim 1, wherein: the silicon steel strip (8) to be treated is arranged to be capable of entering the nitriding furnace (1) through the inlet (2) and leaving the nitriding furnace (1) through the outlet (3), the nitriding furnace (1) comprises an ion nitriding cavity (12), and nitrogen and hydrogen/ammonia are introduced into the ion nitriding cavity (12).
3. The ion nitriding apparatus for oriented silicon steel production according to claim 1 or 2, wherein: the inlet conductive sealing rollers (4) comprise multiple groups, each group of inlet conductive sealing rollers (4) comprises two conductive sealing roller assemblies, the outlet conductive sealing rollers (5) comprise multiple groups, and each group of outlet conductive sealing rollers (5) comprises two conductive sealing roller assemblies.
4. The ion nitriding apparatus for oriented silicon steel production according to claim 1 or 2, wherein: the ion nitriding device for oriented silicon steel production further comprises a plurality of reversing rollers (9), and a to-be-treated silicon steel strip (8) input by the inlet conductive sealing roller (4) is arranged to sequentially bypass the plurality of reversing rollers (9) and then output by the outlet conductive sealing roller (5).
5. The ion nitriding apparatus for oriented silicon steel production according to claim 1 or 2, wherein: a nitriding furnace (1) of an ion nitriding device for oriented silicon steel production in be close to import (2) position and set up import non-contact seal roller (10), nitriding furnace (1) in be close to export (3) position and set up export non-contact seal roller (11).
6. The ion nitriding apparatus for oriented silicon steel production of claim 5, wherein: the inlet non-contact sealing roller (10) comprises two sealing rollers and two eccentric rollers, and the outlet non-contact sealing roller (11) comprises two sealing rollers and two eccentric rollers.
7. An ion nitriding method for oriented silicon steel production is characterized in that: the ion nitriding method for producing the oriented silicon steel comprises the following ion nitriding steps: 1) the silicon steel strip (8) to be treated enters the nitriding furnace (1) through the inlet (2) and leaves the nitriding furnace (1) through the outlet (3); 2) after entering the inlet (2), the silicon steel strip (8) to be treated is contacted with the inlet conductive sealing roller (4), and the silicon steel strip (8) to be treated is connected with the power supply (7); 3) the silicon steel strip (8) to be treated passing through the inlet conductive sealing roller (4) enters an ion nitriding cavity (12) for nitriding; 4) after entering the outlet (3), the silicon steel strip (8) to be treated after nitriding treatment contacts with the outlet conductive sealing roller (5), and the silicon steel strip (8) to be treated is connected with a power supply (7); 5) so that the silicon steel strip (8) to be treated is output to the outlet (3) to finish the ion nitriding treatment.
8. The ion nitriding method for oriented silicon steel production according to claim 7, characterized in that: when the silicon steel strip (8) to be treated is contacted with the inlet conductive sealing roller (4), the electrode (6) sequentially forms an electric loop with ionized nitrogen, the silicon steel strip (8) to be treated, the inlet conductive sealing roller (4) and the power supply (7); when the silicon steel strip (8) to be treated contacts the outlet conductive sealing roller (5), the electrode (6) sequentially forms an electric loop with ionized nitrogen, the silicon steel strip (8) to be treated, the outlet conductive sealing roller (5) and the power supply (7).
9. The ion nitriding method for oriented silicon steel production according to claim 7 or 8, characterized in that: after the silicon steel strip (8) to be treated enters the ion nitriding cavity (12), nitrogen and hydrogen/ammonia gas are introduced into the ion nitriding cavity (12), and the passing steel strip is subjected to rapid nitriding treatment after nitrogen ionization is realized by high voltage under the condition of low vacuum.
10. The ion nitriding method for oriented silicon steel production according to claim 7 or 8, characterized in that: the silicon steel strip (8) to be treated is a preheated strip before entering the nitriding furnace (1) through the inlet (2), and the preheating temperature of the preheated strip is above 1000 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07197231A (en) * | 1993-12-29 | 1995-08-01 | Kobe Steel Ltd | Continuous carburizing or nitriding furnace |
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2020
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| JPH07197231A (en) * | 1993-12-29 | 1995-08-01 | Kobe Steel Ltd | Continuous carburizing or nitriding furnace |
| CN104995327A (en) * | 2013-02-18 | 2015-10-21 | 杰富意钢铁株式会社 | Nitriding method for oriented electromagnetic steel plates and nitriding device |
| CN105074044A (en) * | 2013-02-18 | 2015-11-18 | 杰富意钢铁株式会社 | Apparatus and method for nitriding grain-oriented electrical steel sheet |
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