Method for eliminating edge peeling defect of high-magnetic-induction oriented silicon steel

Abstract

The invention discloses a method for eliminating the edge peeling defect of high-magnetic-induction oriented silicon steel, and relates to the technical field of steel rolling, which comprises the following steps: descaling only once during rough rolling high-pressure water descaling, and descaling only once during rough rolling flat rolling mill descaling; on the basis that overflowing and slipping phenomena do not occur in rough rolling, the rolling speed of each pass of rough rolling is increased; and rough rolling side pressure control is carried out in the mode that side pressure is not carried out in the first pass, the side pressure amount in the third pass does not exceed the preset maximum side pressure amount, and the side pressure in the fifth pass does not generate the eju steel. According to the method for eliminating the edge peeling defect of the high-magnetic-induction oriented silicon steel, the rough rolling descaling mode and frequency are controlled, the rough rolling speed is controlled, and the rough rolling side pressure amount is controlled, so that the temperature drop in the rough rolling process can be reduced as much as possible, the dog bone height in the rough rolling process can be reduced as much as possible, and the edge peeling defect of the high-magnetic-induction oriented silicon steel is overcome. And therefore, the edge peeling defect of the high-magnetic-induction oriented silicon steel is eliminated, and the yield of the high-magnetic-induction oriented silicon steel is remarkably improved.

Description

Technical Field

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

[0002] refer to Figure 1 The existing 1549mm hot rolling production line includes a furnace area, a rough rolling area, a finishing rolling area, a laminar cooling area and a coiling area arranged in sequence. The furnace area includes four heating furnaces arranged in sequence. The rough rolling area includes a high-pressure water descaling box, a rough rolling vertical roll mill (VE0), a rough rolling flat roll mill (R0) and a heat preservation cover arranged in sequence. The finishing rolling area includes a rotary drum head shear, a 7-stand finishing mill (F0~F6 stands), a convexity meter and a flatness meter, as well as a width gauge and a thickness gauge arranged in sequence. The laminar cooling area is equipped with laminar cooling equipment, and the coiling area is equipped with two coilers (C1, C2). The hot rolling process of the 1549mm hot rolling production line is a production method for producing steel coils, usually using continuous casting slabs or initial rolled slabs as raw materials. The main production process of the hot rolling production line is that the slab is first heated in the heating furnace according to the temperature specified by the process, and then enters the rough rolling mill for rolling after heating to the target temperature. The rough rolling vertical roll controls the width, and the rough rolling flat roll controls the thickness. Reversible rolling is carried out in the rough rolling unit, generally 5 to 7 times, with a minimum of 1 time and a maximum of 9 times. When rolling the 1st, 3rd, 5th, 7th and other odd times, the slab first enters the vertical roll rolling to control the width, and the strip head enters the flat roll rolling to control the thickness after exiting the vertical roll. The flat roll and vertical roll are rolled together to control the thickness. During rolling, the exit speed of the vertical roll is the inlet speed of the flat roll. After the tail of the strip leaves the vertical roll, the part between the flat roll and the vertical roll is rolled with the flat roll only to complete the rolling pass. During the 2nd, 4th, 6th and other even passes, only flat roll rolling is performed, and the opening of the vertical roll is released and not controlled. After rolling by the roughing mill, the strip reaches the preset target thickness, width and temperature. After that, it enters the finishing mill for seven-stand flat roll continuous rolling to achieve the preset target thickness and temperature. Finally, the strip is formed into a coil by a coiler.

[0003] During the production process, the descaling of the strip in the rough rolling area is mainly divided into two parts: one part is the descaling in the high-pressure water descaling box, including two descaling steps of entrance descaling and exit descaling. The entrance descaling is usually numbered as 1# descaling, and the exit descaling is numbered as 2# descaling; the second part is the descaling of the roughing flat roll mill (R0 descaling), including one descaling before and after the roughing flat roll mill. From the furnace area to the finishing area, the descaling before the roughing flat roll mill is the entrance descaling, and the descaling after the roughing flat roll mill is the exit descaling. The entrance descaling before the rolling mill is usually numbered as 3# descaling, and the exit descaling after the rolling mill is numbered as 4# descaling.

[0004] High magnetic induction 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, high-speed train brakes, etc. High magnetic induction oriented silicon steel is rolled through hot continuous rolling and cold rolled in the cold rolling process before being handed over to users. However, when the above-mentioned 1549mm hot continuous rolling production line is used to produce high magnetic induction oriented silicon steel, the high magnetic induction oriented silicon steel continuous casting billet has serious edge peeling defects during the hot continuous rolling process. The defect is 30 to 60mm wide from the edge of the strip. The edge defects must be removed during the cold rolling process. If the edge is cut too much, the cold rolling yield will decrease. If the edge is cut too little, it will cause the end user to be unable to use it and become waste. Summary of the invention

[0005] In order to solve part or all of the technical problems existing in the above-mentioned prior art, the present invention provides a method for eliminating the peeling defect at the edge of 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 of high magnetic induction oriented silicon steel is provided, the method comprising:

[0008] Only one descaling is used in rough rolling with high pressure water descaling, and only one descaling is used in rough rolling with flat roll mill descaling;

[0009] On the basis of preventing over-current and slipping during rough rolling, the rolling speed of each pass of rough rolling is increased;

[0010] The rough rolling side pressure is controlled in such a way that no side pressure is applied in the first pass, the side pressure in the third pass does not exceed the preset maximum side pressure, and the side pressure in the fifth pass does not cause steel to bulge.

[0011] In some optional embodiments, only the outlet descaling is used during rough rolling high-pressure water descaling, and only the second inlet descaling is used during rough rolling flat roll mill descaling.

[0012] In some optional implementations, for different grades of high magnetic induction oriented silicon steel, the rolling speed of each rough rolling pass is as follows:

[0013]

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

[0015] In some optional implementations, for different grades of high magnetic induction oriented silicon steel, the maximum side pressure of each rough rolling pass is as follows:

[0016]

[0017]

[0018] In some optional embodiments, the method further comprises:

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

[0020] In some optional embodiments, the method is applied to a 1549mm hot rolling production line.

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

[0022] The method for eliminating edge peeling defects of high magnetic induction oriented silicon steel of the present invention can reduce the temperature drop during rough rolling as much as possible, and reduce the dog bone height during rough rolling as much as possible by controlling the rough rolling descaling method and number of times, controlling the rough rolling speed, and controlling the rough rolling side pressure, thereby eliminating the edge peeling defects of high magnetic induction oriented silicon steel and significantly improving the yield rate of high magnetic induction oriented silicon steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the equipment layout of an existing 1549mm hot rolling production line;

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

[0026] Figure 3 A schematic diagram of the metal flow extension direction of a steel strip during rough rolling provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the edge changes of the strip before and after roughing vertical rolling and before and after roughing flat rolling provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

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

[0030] refer to Figure 2 The embodiment of the present invention provides a method for eliminating the peeling defect of the edge of high magnetic induction oriented silicon steel, which is used in a 1549mm hot rolling production line, and comprises the following steps:

[0031] Only one descaling is used in rough rolling with high pressure water descaling, and only one descaling is used in rough rolling with flat roll mill descaling;

[0032] On the basis of preventing over-current and slipping during rough rolling, the rolling speed of each pass of rough rolling is increased;

[0033] The rough rolling side pressure is controlled in such a way that no side pressure is applied in the first pass, the side pressure in the third pass does not exceed the preset maximum side pressure, and the side pressure in the fifth pass does not cause steel to bulge.

[0034] refer to Figure 3 , it is found that in the rough rolling flat roll rolling area, there are two directions of metal flow, longitudinal extension and transverse extension. The center of the strip is mainly longitudinally extended, while the edge of the strip has both transverse extension and longitudinal extension. In this way, in the rolling direction (longitudinal), there is an inconsistency between the extension of the edge of the strip and the center of the strip; at the same time, due to the fast heat dissipation of the edge and the slow heat dissipation of the center, the center temperature is higher than the edge temperature. The higher the temperature, the more extension, and the lower the temperature, the less extension. Based on the above research, it is found that when the heat dissipation of the edge of the strip is too fast, it will cause a large temperature drop at the edge, resulting in a large difference in the longitudinal extension of a certain contact area between the edge and the center. When the difference in longitudinal extension is large to a certain extent, it will cause the strip surface to peel. Further research has found that when the heat dissipation is faster during the rolling process of the strip, the greater the temperature drop at the edge, the easier it is to cause peeling.

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

[0036] Specifically, in an embodiment of the present invention, descaling in the rough rolling process is performed in a manner of "only one descaling is performed during rough rolling high-pressure water descaling, and only one descaling is performed during rough rolling flat roll mill descaling". This can reduce the number of descaling passes to reduce the temperature drop during the rough rolling process while ensuring that there are no incomplete descaling defects on the surface of the strip; and the rough rolling speed is controlled by "increasing the rolling speed of each rough rolling pass on the basis of no overcurrent and slipping in the rough rolling". This can increase the rough rolling speed to reduce the temperature drop during the rough rolling process while ensuring the rough rolling quality.

[0037] refer to Figure 4 , it is found that during the rough rolling odd pass, the vertical roller controls the width of the strip through the side pressure, and the side pressure deformation is mainly concentrated in the local area of ​​the plate width edge, that is, the deformation stops before it extends to the center of the rolled piece, and it is difficult to penetrate into the middle part of the rolled piece; at this time, there is a rigid area in the deformation zone, resulting in large extension of the edge, small extension in the middle, or even no extension, so that the middle layer metal hinders the extension of the surface metal, thus forcing the surface metal to widen and generate additional compressive stress, which increases the deformation resistance, so that the side of the rolled piece bulges to form a double drum shape, that is, the section surface is "dog bone" shaped. The dog bone part will produce dog bone widening during the flat roll rolling process, and its extension is inconsistent with the center area of ​​the strip. When the difference between the two extensions reaches a certain degree, the edge peeling phenomenon will occur. Further research found that the larger the dog bone, the easier it is to cause peeling, that is, the greater the side pressure, the easier it is to cause peeling, and the first pass has a much greater impact on the formation of dog bones than the third pass, while the fifth pass has basically no effect.

[0038] Based on the above research and analysis, in an embodiment of the present invention, the rough rolling side pressure is controlled in such a way that no side pressure is performed in the first pass, the side pressure in the third pass does not exceed the preset maximum side pressure, and the side pressure in the fifth pass does not produce dog bones, so as to reduce the height of the formed dog bones as much as possible, thereby reducing the peeling defect on the edge of the strip.

[0039] In the embodiments of the present invention, the "ju steel" means that the strip is deformed into an upward or downward bow under the action of the side pressure of the vertical roll, which makes it difficult for the flat roll to bite and causes scrap steel failure. The "ju steel" phenomenon is easy to occur when the strip becomes thinner, and generally occurs in the last pass of rough rolling.

[0040] The method for eliminating edge peeling defects of high magnetic induction oriented silicon steel provided in an embodiment of the present invention can reduce the temperature drop during rough rolling as much as possible, and reduce the dog bone height during rough rolling as much as possible by controlling the rough rolling descaling method and number of times, controlling the rough rolling speed, and controlling the rough rolling side pressure, thereby eliminating the edge peeling defects of high magnetic induction oriented silicon steel and significantly improving the yield rate of high magnetic induction oriented silicon steel.

[0041] Furthermore, in the embodiment of the present invention, only the outlet descaling is adopted in the rough rolling high-pressure water descaling, and only the second pass inlet descaling is adopted in the rough rolling flat roll mill descaling.

[0042] In the embodiment of the present invention, by performing descaling in the rough rolling process in the manner of "only using outlet descaling in rough rolling high-pressure water descaling, and only using second-pass entrance descaling in rough rolling flat roll mill descaling", the temperature drop in the rough rolling process can be minimized, thereby reducing the edge peeling defects of high magnetic induction oriented silicon steel, and at the same time ensuring that there are no incomplete descaling defects on the surface of the strip.

[0043] Further, in the embodiment of the present invention, for different steel grades of high magnetic induction oriented silicon steel, the rolling speed of each rough rolling pass is taken according to the following table:

[0044] Table 1 Rolling speed values ​​for each pass of rough rolling

[0045]

[0046] Among them, in Table 1, when the value of the rolling speed is a range value, the value of 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 embodiment of the present invention, the rolling speed in the above table refers to the flat roll rolling speed, and the vertical roll rolling speed, flat roll biting speed and vertical roll biting speed of rough rolling are directly calculated based on the determined flat roll rolling speed.

[0048] In the embodiment of the present invention, by controlling the rolling speed of rough rolling based on the rolling speed of each rough rolling pass specified above, the rough rolling speed can be maximized, the temperature drop during the rough rolling process can be reduced, and the edge peeling defects of high magnetic induction oriented silicon steel can be reduced. At the same time, it can ensure that there is no overcurrent and slipping in the rough rolling, thereby ensuring the quality of the rough rolling.

[0049] Further, in the embodiment of the present invention, for different steel grades of high magnetic induction oriented silicon steel, the maximum lateral pressure of each rough rolling pass is taken according to the following table:

[0050] Table 1 Maximum side pressure values ​​for each rough rolling pass

[0051]

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

[0053] Further, in the embodiment of the present invention, on the basis of using the above-specifically defined maximum side pressure amount of each rough rolling pass to control the rough rolling side pressure, the method further includes:

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

[0055] In an embodiment of the present invention, by controlling the rough rolling side pressure based on the maximum side pressure of each rough rolling pass specifically defined above, the target value of the billet width is controlled in the manner of "billet width target = finished product width target - 20 mm", thereby ensuring the width control accuracy of high magnetic induction oriented silicon steel.

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

[0057] Example 1

[0058] This embodiment rolls high magnetic induction oriented silicon steel, steel type: DQ02, steel coil number: 946407401, billet thickness 222mm, billet width 1053mm, finished product thickness 2.1mm, and finished product width target 1070mm.

[0059] For the high magnetic induction oriented silicon steel rolled in this embodiment, the method for eliminating the peeling defect at the edge of the high magnetic induction oriented silicon steel is as follows:

[0060] Descaling is done at the outlet of the rough rolling high-pressure water descaling machine, and descaling is done at the second entrance of the rough rolling flat roll mill;

[0061] According to Table 1, the flat roll rolling speed of each rough rolling pass is selected, and the vertical roll rolling speed, flat roll biting speed, and vertical roll biting speed of each pass are calculated according to the selected flat roll rolling speed, and the rolling speeds shown in the following table are obtained:

[0062]

[0063] According to Table 2, the maximum side pressure of each rough rolling pass is determined. Based on the determined maximum side pressure, the rough rolling width is calculated, and the results shown in the following table are obtained:

[0064]

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

[0066] Example 2

[0067] This embodiment rolls high magnetic induction oriented silicon steel, steel type: DQ02, steel coil number: 946408301, billet thickness 222mm, billet width 1087mm, finished product thickness 2.3mm, finished product width target 1100mm.

[0068] For the high magnetic induction oriented silicon steel rolled in this embodiment, the method for eliminating the peeling defect at the edge of the high magnetic induction oriented silicon steel is as follows:

[0069] Descaling is done at the outlet of rough rolling high-pressure water descaling, and descaling is done at the second entrance of rough rolling flat roll mill;

[0070] According to Table 1, the flat roll rolling speed of each rough rolling pass is selected, and the vertical roll rolling speed, flat roll biting speed, and vertical roll biting speed of each pass are calculated according to the selected flat roll rolling speed, and the rolling speeds shown in the following table are obtained:

[0071]

[0072] According to Table 2, the maximum side pressure of each rough rolling pass is determined. Based on the determined maximum side pressure, the rough rolling width is calculated, and the results shown in the following table are obtained:

[0073]

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

[0075] Example 3

[0076] This embodiment rolls high magnetic induction oriented silicon steel, steel type: DQ03, steel coil number: 946441002, billet thickness 222mm, billet width 1059mm, finished product thickness 2.3mm, and finished product width target 1070mm.

[0077] For the high magnetic induction oriented silicon steel rolled in this embodiment, the method for eliminating the peeling defect at the edge of the high magnetic induction oriented silicon steel is as follows:

[0078] Descaling is done at the outlet of rough rolling high-pressure water descaling, and descaling is done at the second entrance of rough rolling flat roll mill;

[0079] According to Table 1, the flat roll rolling speed of each rough rolling pass is selected, and the vertical roll rolling speed, flat roll biting speed, and vertical roll biting speed of each pass are calculated according to the selected flat roll rolling speed, and the rolling speeds shown in the following table are obtained:

[0080]

[0081] According to Table 2, the maximum side pressure of each rough rolling pass is determined. Based on the determined maximum side pressure, the rough rolling width is calculated, and the results shown in the following table are obtained:

[0082]

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

[0084] Example 4

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

[0086] For the high magnetic induction oriented silicon steel rolled in this embodiment, the method for eliminating the peeling defect at the edge of the high magnetic induction oriented silicon steel is as follows:

[0087] Descaling is done at the outlet of the rough rolling high-pressure water descaling machine, and descaling is done at the second entrance of the rough rolling flat roll mill;

[0088] According to Table 1, the flat roll rolling speed of each rough rolling pass is selected, and the vertical roll rolling speed, flat roll biting speed, and vertical roll biting speed of each pass are calculated according to the selected flat roll rolling speed, and the rolling speeds shown in the following table are obtained:

[0089]

[0090]

[0091] According to Table 2, the maximum side pressure of each rough rolling pass is determined. Based on the determined maximum side pressure, the rough rolling width is calculated, and the results shown in the following table are obtained:

[0092]

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

[0094] Example 5

[0095] This embodiment rolls high magnetic induction oriented silicon steel, steel type: DQ05, steel coil number: 946409201, billet thickness 222mm, billet width 1053mm, finished product thickness 2.3mm, finished product width target 1070mm.

[0096] For the high magnetic induction oriented silicon steel rolled in this embodiment, the method for eliminating the peeling defect at the edge of the high magnetic induction oriented silicon steel is as follows:

[0097] Descaling is done at the outlet of the rough rolling high-pressure water descaling machine, and descaling is done at the second entrance of the rough rolling flat roll mill;

[0098] According to Table 1, the flat roll rolling speed of each rough rolling pass is selected, and the vertical roll rolling speed, flat roll biting speed, and vertical roll biting speed of each pass are calculated according to the selected flat roll rolling speed, and the rolling speeds shown in the following table are obtained:

[0099]

[0100] According to Table 2, the maximum side pressure of each rough rolling pass is determined. Based on the determined maximum side pressure, the rough rolling width is calculated, and the results shown in the following table are obtained:

[0101]

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

[0103] It can be seen that the method for eliminating the edge peeling defect of high magnetic induction oriented silicon steel provided by the embodiment of the present invention can eliminate the edge peeling defect of high magnetic induction oriented silicon steel and significantly improve the yield rate of high magnetic induction oriented silicon steel.

[0104] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for eliminating the peeling defect of the edge of high magnetic induction oriented silicon steel, characterized in that: include: Only one descaling is used in rough rolling with high pressure water descaling, and only one descaling is used in rough rolling with flat roll mill descaling; On the basis of preventing over-current and slipping during rough rolling, the rolling speed of each pass of rough rolling is increased; The rough rolling side pressure is controlled in such a way that no side pressure is applied in the first pass, the side pressure in the third pass does not exceed the preset maximum side pressure, and the side pressure in the fifth pass does not cause steel to bulge.

2. The method for eliminating edge peeling defects of high magnetic induction oriented silicon steel according to claim 1, characterized in that: During rough rolling high-pressure water descaling, only the outlet descaling is used, and during rough rolling flat roll mill descaling, only the second entrance descaling is used.

3. The method for eliminating edge peeling defects of high magnetic induction oriented silicon steel according to claim 1, characterized in that: For different grades of high magnetic induction oriented silicon steel, the rolling speed of each pass of rough rolling is as follows: The rolling speed refers to the flat roll rolling speed. When the rolling speed is a range value, the rolling speed includes the lower boundary value but does not include the upper boundary value.

4. The method for eliminating edge peeling defects of high magnetic induction oriented silicon steel according to claim 1, characterized in that: For different grades of high magnetic induction oriented silicon steel, the maximum side pressure of each rough rolling pass is as follows:

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

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

Images