Methods to eliminate edge peeling defects in high magnetic induction oriented silicon steel

Abstract

This invention discloses a method for eliminating edge peeling defects in high-magnetic-induction oriented silicon steel, relating to the field of steel rolling technology. The method includes: employing only one descaling step during high-pressure water descaling in roughing mills, and only one descaling step during flat-roll mill descaling in roughing mills; increasing the rolling speed of each pass in roughing mills without overflow or slippage; and controlling the side pressure in roughing mills by ensuring no side pressure in the first pass, side pressure in the third pass does not exceed a preset maximum side pressure, and side pressure in the fifth pass does not produce brittle steel. This method for eliminating edge peeling defects in high-magnetic-induction oriented silicon steel, by controlling the descaling method and number of passes, the rolling speed, and the side pressure, can minimize the temperature drop and the height of the "dog bone" (the vertical strut) during roughing milling, thereby eliminating edge peeling defects and significantly improving the yield of high-magnetic-induction oriented silicon steel.

Description

Technical Field

[0001] This invention relates to the field of steel rolling technology, and in particular to a method for eliminating edge peeling defects in high magnetic induction oriented silicon steel. Background Technology

[0002] refer to Figure 1 The existing 1549mm hot continuous rolling production line includes a furnace area, a roughing rolling area, a finishing rolling area, a laminar flow cooling area, and a coiling area arranged sequentially. The furnace area includes four heating furnaces arranged sequentially. The roughing rolling area includes a high-pressure water descaling box, a roughing vertical roll mill (VE0), a roughing horizontal roll mill (R0), and a heat insulation cover arranged sequentially. The finishing rolling area includes a rotary drum-type flying shear, a 7-stand finishing mill (F0 to F6 stands), a crown gauge and a straightness gauge, as well as a width gauge and a thickness gauge arranged sequentially. The laminar flow cooling area is equipped with laminar flow cooling equipment, and the coiling area has two coilers (C1 and C2). The hot continuous rolling process of the 1549mm hot continuous rolling production line is a production method for producing steel coils, usually using continuously cast slabs or primary rolled slabs as raw materials. The main production process of this hot strip mill is as follows: the slab is first heated in a furnace at the temperature specified by the process. After reaching the target temperature, it first enters the roughing mill for rolling. The vertical rolls control the width, and the horizontal rolls control the thickness. Reversible rolling is performed on the roughing mill, typically in 5-7 passes, with a minimum of 1 pass and a maximum of 9 passes. During the 1st, 3rd, 5th, and 7th passes (odd passes), the strip first enters the vertical rolls to control the width. After exiting the vertical rolls, the strip head enters the horizontal rolls to control the thickness. The rolling process involves both the horizontal and vertical rolls. During rolling, the exit speed of the vertical rolls is the same as the entry speed of the horizontal rolls. After the strip exits the vertical rolls, the portion between the horizontal and vertical rolls is rolled only by the horizontal rolls to complete the rolling of that pass. In the 2nd, 4th, and 6th even-pass rolling, only the horizontal rolls are rolled, and the opening of the vertical rolls is left uncontrolled. After being rolled by the roughing mill, the strip reaches the preset target thickness, width, and temperature. Then it enters the finishing mill for seven-stand horizontal roll continuous rolling to reach the preset target thickness and temperature. Finally, the strip is formed into a coil by the coiler.

[0003] During the production process, descaling of strip steel in the roughing rolling zone is mainly divided into two parts: one part is descaling in a high-pressure water descaling box, which includes two descaling stages: inlet descaling and outlet descaling. Usually, the inlet descaling is numbered as No. 1 descaling and the outlet descaling is numbered as No. 2 descaling. The second part is descaling in the roughing rolling mill (R0 descaling), which includes one descaling stage before and after the roughing rolling mill. In the direction from the furnace area to the finishing rolling area, the descaling before the roughing rolling mill is the inlet descaling, and the descaling after the roughing rolling mill is the outlet descaling. Usually, the inlet descaling before the mill is numbered as No. 3 descaling and the outlet descaling after the mill is numbered as No. 4 descaling.

[0004] High-magnetic-induction grain-oriented silicon steel is a high-performance electrical material with high magnetic permeability, low iron loss rate, and excellent dynamic magnetic properties. It is widely used in high-end manufacturing fields such as transformers, motors, generators, high-speed rotating machinery, high-precision measuring instruments, and high-speed train brakes. High-magnetic-induction grain-oriented silicon steel is produced through hot continuous rolling and then cold rolling before being delivered to users. However, currently, when producing high-magnetic-induction grain-oriented silicon steel using the aforementioned 1549mm hot continuous rolling production line, severe edge peeling defects occur in the continuous casting billets during hot continuous rolling. The width of the defect from the strip edge reaches 30-60mm. During cold rolling, these edge defects must be removed. Excessive edge removal reduces the cold-rolled yield, while insufficient removal renders the product unusable by end users and results in scrap. Summary of the Invention

[0005] To address some or all of the technical problems existing in the prior art, the present invention provides a method for eliminating edge peeling defects in high magnetic induction oriented silicon steel.

[0006] The technical solution of the present invention is as follows:

[0007] A method for eliminating edge peeling defects in high-magnetic-induction grain-oriented silicon steel is provided, the method comprising:

[0008] Only one descaling is used during high-pressure water descaling in roughing mills, and only one descaling is used during descaling in roughing mill flat roll mills.

[0009] On the premise that no overflow or slippage occurs in the roughing mill, increase the rolling speed of each pass in the roughing mill;

[0010] The roughing side pressure is controlled by not applying side pressure in the first pass, not exceeding the preset maximum side pressure in the third pass, and not producing brittle steel in the fifth pass.

[0011] In some alternative implementations, only outlet descaling is used during high-pressure water descaling in roughing mills, and only the second inlet descaling is used during descaling in roughing mills with flat rolls.

[0012] In some optional implementations, the rolling speeds for each pass of the roughing mill are selected as follows for different grades of high magnetic induction grain-oriented silicon steel:

[0013]

[0014] Among them, the rolling speed refers to the rolling speed of the flat roll. When the rolling speed is taken as a range value, the rolling speed value includes the lower boundary value but does not include the upper boundary value.

[0015] In some optional implementations, the maximum side pressure values ​​for each pass of the roughing mill are as follows, depending on the different grades of high magnetic induction oriented silicon steel:

[0016]

[0017]

[0018] In some optional implementations, the method further includes:

[0019] The target value of the billet width is controlled according to the method of "target billet width = target finished product width - 20mm".

[0020] In some alternative implementations, the method is applied to a 1549mm hot rolling mill production line.

[0021] The main advantages of the technical solution of this invention are as follows:

[0022] The method of the present invention for eliminating edge peeling defects in high magnetic induction oriented silicon steel is achieved by controlling the descaling method and number of times in rough rolling, controlling the rough rolling speed, and controlling the side pressure in rough rolling. This can minimize the temperature drop during the rough rolling process and minimize the dog bone height during the rough rolling process, thereby eliminating edge peeling defects in high magnetic induction oriented silicon steel and significantly improving the yield of high magnetic induction oriented silicon steel. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and constitute a part of this invention, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the equipment layout for an existing 1549mm hot strip mill production line.

[0025] Figure 2 A flowchart illustrating a method for eliminating edge peeling defects in high-magnetic-induction oriented silicon steel, provided by an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the metal flow extension direction of strip steel during rough rolling, provided in an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram showing the edge changes of the strip before and after roughing with vertical rollers and before and after roughing with horizontal rolls, as provided in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] refer to Figure 2 This invention provides a method for eliminating edge peeling defects in high magnetic induction oriented silicon steel. The method is used in a 1549mm hot continuous rolling production line and includes the following steps:

[0031] Only one descaling is used during high-pressure water descaling in roughing mills, and only one descaling is used during descaling in roughing mill flat roll mills.

[0032] On the premise that no overflow or slippage occurs in the roughing mill, increase the rolling speed of each pass in the roughing mill;

[0033] The roughing side pressure is controlled by not applying side pressure in the first pass, not exceeding the preset maximum side pressure in the third pass, and not producing brittle steel in the fifth pass.

[0034] refer to Figure 3 Research has revealed that in the roughing and rolling zone of strip steel, metal flow exists in both longitudinal and transverse directions. The central portion of the strip primarily exhibits longitudinal extension, while the edges show both longitudinal and transverse extension simultaneously. This results in an inconsistency between the longitudinal extension of the strip at the edges and at the center. Furthermore, because heat dissipates faster at the edges than at the center, the center temperature is higher than the edge temperature. Higher temperatures lead to greater extension, and lower temperatures to less extension. Based on this research, it was found that excessively rapid heat dissipation at the edges causes a large temperature drop, resulting in a significant difference in longitudinal extension between the edge and a certain contact area at the center. When this difference in longitudinal extension becomes significant enough, it leads to surface peeling of the strip. Further research indicates that the faster the heat dissipation during strip rolling, the greater the temperature drop at the edges, and the more prone the strip is to peeling.

[0035] Based on the above research and analysis, in the embodiments of the present invention, the temperature drop during the roughing rolling process is reduced by reducing the number of descaling passes and increasing the rolling speed of each pass of the roughing rolling, thereby reducing the edge peeling defects of the strip steel.

[0036] Specifically, in this embodiment of the invention, descaling during the roughing process is performed by "using only one descaling pass during high-pressure water descaling in roughing and only one descaling pass during flat roll mill descaling in roughing." This reduces the number of descaling passes, thereby lowering the temperature drop during the roughing process, while ensuring that the strip surface is free of incomplete descaling defects. Furthermore, controlling the rolling speed of the roughing process by "increasing the rolling speed of each pass in roughing without overflow or slippage" increases the rolling speed, thereby reducing the temperature drop during the roughing process, while ensuring the quality of the roughing roll.

[0037] refer to Figure 4 Research revealed that during roughing and rolling, the vertical rolls control the strip width through lateral pressure. Lateral deformation is mainly concentrated in localized areas along the strip's width, meaning deformation stops before reaching the center of the strip and is difficult to penetrate into the middle. At this point, a rigid zone exists within the deformation area, resulting in greater edge extension and less or no extension in the center. This causes the intermediate metal layer to hinder the extension of the surface metal, forcing it to widen and generating additional compressive stress. This increases the deformation resistance, causing the strip's sides to bulge and form a double-bulge shape, or a "dog-bone" profile. During flat rolling, the dog-bone portion widens, and its extension differs from the central area of ​​the strip. When this difference in extension reaches a certain level, edge peeling occurs. Further research showed that the larger the dog-bone, the more prone it is to peeling; that is, the greater the lateral pressure, the more likely peeling is to occur. Furthermore, the first pass has a much greater impact on dog-bone formation than the third pass, while the fifth pass has virtually no effect.

[0038] Based on the above research and analysis, in this embodiment of the invention, the rough rolling side pressure is controlled by not applying side pressure in the first pass, not exceeding the preset maximum side pressure in the third pass, and not producing brittle strips in the fifth pass, so as to minimize the height of the formed dog bones and thus reduce the edge peeling defects of the strip.

[0039] In this embodiment of the invention, "bowing steel" refers to the deformation of the strip caused by the lateral pressure of the vertical rolls, resulting in upward or downward bowing, which makes it difficult for the flat rolls to bite in and leads to scrap steel failure. The bowing steel phenomenon is more likely to occur when the strip becomes thinner, and generally occurs in the last pass of roughing rolling.

[0040] The method for eliminating edge peeling defects in high magnetic induction oriented silicon steel provided in this invention controls the descaling method and number of times during rough rolling, the rough rolling speed, and the side pressure during rough rolling. This can minimize the temperature drop during rough rolling and the height of the "dog bone" (the vertical strut) during rough rolling, thereby eliminating edge peeling defects in high magnetic induction oriented silicon steel and significantly improving the yield of high magnetic induction oriented silicon steel.

[0041] Furthermore, in this embodiment of the invention, only outlet descaling is used during high-pressure water descaling in the roughing mill, and only the second inlet descaling is used during descaling in the roughing mill flat roll mill.

[0042] In this embodiment of the invention, by performing descaling in the roughing process using only outlet descaling during high-pressure water descaling in roughing and only the second inlet descaling during roughing flat roll mill descaling, the temperature drop during the roughing process can be minimized, thereby reducing edge peeling defects in high magnetic induction oriented silicon steel, while ensuring that there are no defects of incomplete descaling on the strip surface.

[0043] Furthermore, in this embodiment of the invention, the rolling speed of each pass in the roughing mill is determined according to the following table for different grades of high magnetic induction oriented silicon steel:

[0044] Table 1. Rolling speed values ​​for each pass in roughing milling.

[0045]

[0046] In Table 1, when the rolling speed is set to a range, the rolling speed includes the lower boundary value but does not include the upper boundary value. That is, "2.8~3.0" means "2.8≤rolling speed<3.0".

[0047] It should be noted that, in the embodiments of the present invention, the rolling speed in the table above refers to the flat roll rolling speed, while the vertical roll rolling speed, flat roll biting speed and vertical roll biting speed of the roughing mill are directly calculated based on the determined flat roll rolling speed.

[0048] In this embodiment of the invention, by controlling the rolling speed of the roughing mill based on the above-defined rolling speed of each pass, the rolling speed of the roughing mill can be maximized, the temperature drop during the roughing mill rolling process can be reduced, thereby reducing the edge peeling defects of high magnetic induction oriented silicon steel, while ensuring that the roughing mill does not experience overflow or slippage, thus ensuring the quality of the roughing mill rolling.

[0049] Furthermore, in this embodiment of the invention, for different grades of high magnetic induction oriented silicon steel, the maximum side pressure of each pass in the roughing mill is determined according to the following table:

[0050] Table 2. Values ​​of maximum lateral pressure for each pass in roughing rolling.

[0051]

[0052] In this embodiment of the invention, by controlling the side pressure of rough rolling based on the maximum side pressure of each pass of rough rolling as defined above, the height of the dog bone formed can be reduced as much as possible, thereby reducing the edge peeling defects of high magnetic induction oriented silicon steel.

[0053] Furthermore, in this embodiment of the invention, based on controlling the roughing side pressure using the specifically defined maximum side pressure amount for each pass of the roughing mill, the method further includes:

[0054] The target value of the billet width is controlled according to the method of "target billet width = target finished product width - 20mm".

[0055] In this embodiment of the invention, by controlling the side pressure of roughing using the maximum side pressure of each pass of roughing as specifically defined above, and controlling the target value of the billet width according to the method of "target billet width = target finished product width - 20mm", the width control accuracy of high magnetic induction oriented silicon steel can be guaranteed.

[0056] To make the above technical solutions of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0057] Example 1

[0058] This embodiment describes the rolling of high magnetic induction oriented silicon steel, with steel grade: DQ02, steel coil number: 946407401, billet thickness 222mm, billet width 1053mm, finished product thickness 2.1mm, and target finished product width 1070mm.

[0059] The specific method for eliminating edge peeling defects in the high magnetic induction oriented silicon steel rolled in this embodiment is as follows:

[0060] High-pressure water descaling is introduced at the outlet of the roughing mill, and descaling is introduced at the inlet of the second pass of the roughing mill flat roll mill.

[0061] Based on Table 1, the rolling speeds of the horizontal rolls for each pass of the roughing mill were selected, and the rolling speeds of the vertical rolls, the horizontal roll biting speed, and the vertical roll biting speed for each pass were calculated based on the selected horizontal roll rolling speeds, resulting in the rolling speeds shown in the table below:

[0062]

[0063] According to Table 2, the maximum side pressure for each pass of the roughing mill was determined. Based on the determined maximum side pressure, the roughing mill width was calculated, and the results are shown in the table below:

[0064]

[0065] Based on the above limitations, the high magnetic induction oriented silicon steel was rolled. The strip rolling was stable, and the actual width of the finished product was 1078mm, which met the width control requirements of 0-20mm. The finished strip had no edge peeling defects and good surface quality.

[0066] Example 2

[0067] This embodiment describes the rolling of high magnetic induction oriented silicon steel, with steel grade: DQ02, steel coil number: 946408301, billet thickness 222mm, billet width 1087mm, finished product thickness 2.3mm, and target finished product width 1100mm.

[0068] The specific method for eliminating edge peeling defects in the high magnetic induction oriented silicon steel rolled in this embodiment is as follows:

[0069] High-pressure water descaling is introduced at the outlet of the roughing mill, and descaling is introduced at the inlet of the second pass of the roughing mill flat roll mill.

[0070] Based on Table 1, the rolling speeds of the horizontal rolls for each pass of the roughing mill were selected, and the rolling speeds of the vertical rolls, the horizontal roll biting speed, and the vertical roll biting speed for each pass were calculated based on the selected horizontal roll rolling speeds, resulting in the rolling speeds shown in the table below:

[0071]

[0072] According to Table 2, the maximum side pressure for each pass of the roughing mill was determined. Based on the determined maximum side pressure, the roughing mill width was calculated, and the results are shown in the table below:

[0073]

[0074] Based on the above limitations, the high magnetic induction oriented silicon steel was rolled. The strip rolling was stable, and the actual width of the finished product was 1115mm, which met the width control requirements of 0-20mm. The finished strip had no edge peeling defects and good surface quality.

[0075] Example 3

[0076] This embodiment describes the rolling of high magnetic induction oriented silicon steel, with steel grade: DQ03, steel coil number: 946441002, billet thickness 222mm, billet width 1059mm, finished product thickness 2.3mm, and target finished product width 1070mm.

[0077] The specific method for eliminating edge peeling defects in the high magnetic induction oriented silicon steel rolled in this embodiment is as follows:

[0078] High-pressure water descaling is introduced at the outlet of the roughing mill, and descaling is introduced at the inlet of the second pass of the roughing mill flat roll mill.

[0079] Based on Table 1, the rolling speeds of the horizontal rolls for each pass of the roughing mill were selected, and the rolling speeds of the vertical rolls, the horizontal roll biting speed, and the vertical roll biting speed for each pass were calculated based on the selected horizontal roll rolling speeds, resulting in the rolling speeds shown in the table below:

[0080]

[0081] According to Table 2, the maximum side pressure for each pass of the roughing mill was determined. Based on the determined maximum side pressure, the roughing mill width was calculated, and the results are shown in the table below:

[0082]

[0083] Based on the above limitations, the high magnetic induction oriented silicon steel was rolled. The strip rolling was stable, and the actual width of the finished product was 1087mm, which met the width control requirements of 0-20mm. The finished strip had no edge peeling defects and good surface quality.

[0084] Example 4

[0085] This embodiment describes the rolling of high magnetic induction oriented silicon steel, steel grade: DQ04, steel coil number: 946407701, billet thickness 222mm, billet width 1049mm, finished product thickness 2.5mm, and finished product width target 1070mm.

[0086] The specific method for eliminating edge peeling defects in the high magnetic induction oriented silicon steel rolled in this embodiment is as follows:

[0087] High-pressure water descaling is introduced at the outlet of the roughing mill, and descaling is introduced at the inlet of the second pass of the roughing mill flat roll mill.

[0088] Based on Table 1, the rolling speeds of the horizontal rolls for each pass of the roughing mill were selected, and the rolling speeds of the vertical rolls, the horizontal roll biting speed, and the vertical roll biting speed for each pass were calculated based on the selected horizontal roll rolling speeds, resulting in the rolling speeds shown in the table below:

[0089]

[0090]

[0091] According to Table 2, the maximum side pressure for each pass of the roughing mill was determined. Based on the determined maximum side pressure, the roughing mill width was calculated, and the results are shown in the table below:

[0092]

[0093] Based on the above limitations, the high magnetic induction oriented silicon steel was rolled. The strip rolling was stable, and the actual width of the finished product was 1077mm, which met the width control requirements of 0-20mm. The finished strip had no edge peeling defects and good surface quality.

[0094] Example 5

[0095] This embodiment describes the rolling of high magnetic induction oriented silicon steel, with steel grade: DQ05, steel coil number: 946409201, billet thickness 222mm, billet width 1053mm, finished product thickness 2.3mm, and a target finished product width of 1070mm.

[0096] The specific method for eliminating edge peeling defects in the high magnetic induction oriented silicon steel rolled in this embodiment is as follows:

[0097] High-pressure water descaling is introduced at the outlet of the roughing mill, and descaling is introduced at the inlet of the second pass of the roughing mill flat roll mill.

[0098] Based on Table 1, the rolling speeds of the horizontal rolls for each pass of the roughing mill were selected, and the rolling speeds of the vertical rolls, the horizontal roll biting speed, and the vertical roll biting speed for each pass were calculated based on the selected horizontal roll rolling speeds, resulting in the rolling speeds shown in the table below:

[0099]

[0100] According to Table 2, the maximum side pressure for each pass of the roughing mill was determined. Based on the determined maximum side pressure, the roughing mill width was calculated, and the results are shown in the table below:

[0101]

[0102] Based on the above limitations, the high magnetic induction oriented silicon steel was rolled. The strip rolling was stable, and the actual width of the finished product was 1079mm, which met the width control requirements of 0-20mm. The finished strip had no edge peeling defects and good surface quality.

[0103] As can be seen, the method for eliminating edge peeling defects in high magnetic induction oriented silicon steel provided by the embodiments of the present invention can eliminate edge peeling defects in high magnetic induction oriented silicon steel and significantly improve the yield of high magnetic induction oriented silicon steel.

[0104] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, the terms "front," "back," "left," "right," "upper," and "lower" in this document refer to the placement shown in the accompanying drawings.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for eliminating edge peeling defects in high magnetic induction oriented silicon steel, characterized in that, include: Only one descaling is used during high-pressure water descaling in roughing mills, and only one descaling is used during descaling in roughing mill flat roll mills. On the premise that no overflow or slippage occurs in the roughing mill, increase the rolling speed of each pass in the roughing mill; The roughing side pressure is controlled by not applying side pressure in the first pass, not exceeding the preset maximum side pressure in the third pass, and not producing brittle steel in the fifth pass. For different grades of high magnetic induction grain-oriented silicon steel, the maximum side pressure values ​​for each pass of roughing rolling are as follows: 。 2. The method for eliminating edge peeling defects in high magnetic induction oriented silicon steel according to claim 1, characterized in that, During high-pressure water descaling in roughing mills, only the outlet descaling is used; during descaling in roughing mills with flat rolls, only the second inlet descaling is used.

3. The method for eliminating edge peeling defects in high magnetic induction oriented silicon steel according to claim 1, characterized in that, The rolling speed values ​​for each pass of the roughing mill are as follows, depending on the different grades of high magnetic induction grain-oriented silicon steel: ； Among them, the rolling speed refers to the rolling speed of the flat roll. When the rolling speed is taken as a range value, the rolling speed value includes the lower boundary value but does not include the upper boundary value.

4. The method for eliminating edge peeling defects in high magnetic induction oriented silicon steel according to claim 1, characterized in that, The method further includes: The target value of the billet width is controlled according to the method of "target billet width = target finished product width - 20mm".

5. The method for eliminating edge peeling defects in high magnetic induction oriented silicon steel according to any one of claims 1-4, characterized in that, The method is applied to a 1549mm hot rolling mill production line.

Images