CN112692061A - Hot rolling method for improving surface quality of steel plate - Google Patents
Hot rolling method for improving surface quality of steel plate Download PDFInfo
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- CN112692061A CN112692061A CN202011446344.7A CN202011446344A CN112692061A CN 112692061 A CN112692061 A CN 112692061A CN 202011446344 A CN202011446344 A CN 202011446344A CN 112692061 A CN112692061 A CN 112692061A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
Abstract
The invention relates to a hot rolling method for improving the surface quality of a steel plate, which comprises the following steps: slab continuous casting, heating by a heating furnace, primary high-pressure water descaling, rolling by a roughing mill set (edge folding by an attached vertical roller), head and tail cutting by a shear, secondary high-pressure water descaling, rolling by a seven-stand finishing mill set, cooling treatment and coiling by a coiler; wherein the side pressure of the vertical roll for edge folding of the vertical roll is 15mm to 35mm, and the cooling treatment is strip steel laminar cooling. Edge defects can be effectively reduced or even eliminated by edge folding of the vertical roller; the r value is improved, so that the formability of the strip steel is better; the roughness of the working roll of the F7 frame is improved, and the influence of grinding knife patterns on the surface of the strip steel is eliminated; working rollers from the F1 stand to the F4 stand are high-speed steel rollers and rolling oil input is controlled, the surface quality of the strip steel is improved, and the defect of pressing of iron scales is overcome; the rapid cooling can reduce the cooling difference of the edge part and the center part of the strip steel and improve the uniformity of the structure and the crystal grains of the strip steel.
Description
Technical Field
The invention relates to the technical field of hot rolling of steel plates, in particular to a hot rolling method for improving the surface quality of a steel plate.
Background
The hot rolling is rolling at a temperature above the recrystallization temperature, the hot rolling can improve the processing technological properties of metals and alloys, namely, coarse grains in a casting state are crushed, cracks are obviously healed, casting defects are reduced or eliminated, an as-cast structure is converted into a deformed structure, and the processing properties of the alloys are improved.
Therefore, there is a need to develop a hot rolling method for improving the surface quality of a steel sheet, which can effectively remove the strip defects after the stamping of a cold-rolled strip steel, and improve the surface quality of the steel sheet.
Disclosure of Invention
The present invention is directed to solving one of the technical problems of the prior art or the related art.
Therefore, the invention provides a hot rolling method for improving the surface quality of a steel plate.
In view of the above, the present invention provides a hot rolling method for improving the surface quality of a steel sheet, the hot rolling method comprising the steps of:
slab continuous casting, heating by a heating furnace, primary high-pressure water descaling, rolling by a roughing mill set (edge folding by an attached vertical roller), cutting by a head and tail by a flying shear, secondary high-pressure water descaling, rolling by a seven-stand finishing mill set, cooling treatment and coiling by a coiler;
the side pressure of the vertical roll for edge folding of the vertical roll is 15 mm-35 mm, and the cooling treatment is strip steel laminar cooling.
Further, the heating furnace is a walking beam heating furnace, and the time of the plate blank in the walking beam heating furnace is not longer than 220 min.
Further, the tapping temperature of the plate blank is 1200-1240 ℃, and the finishing temperature of the strip steel is 910-950 ℃.
Further, the seven-stand finishing mill group comprises F1 stands to F7 stands, wherein working rolls of the F1 stands to the F4 stands are high-speed steel rolls, and rolling oil input of the seven-stand finishing mill group is controlled.
Further, the working rolls of the F1 frame to the F7 frame are all finish grinding rolls, wherein the roughness of the working rolls of the F7 frame is not more than 0.8 μm.
Furthermore, the working roll period of the seven-stand finishing mill unit is 10km to 30km, the initial rolling material and the transition material are mainly medium carbon steel and low carbon or ultra-low carbon steel with higher coiling temperature, and the target thickness after the strip steel is rolled exceeds 4.0 mm.
Furthermore, in the service cycle of the supporting rollers R1 and R2 of the roughing mill group, the service cycle of the front 1/2 produces strip steel with the width more than 1500mm, and the service cycle of the rear 1/2 produces strip steel with the width less than 1500 mm.
Further, the first high-pressure water descaling is a double-row scale removal spraying header with a pressure value of more than 225bar, and the second high-pressure water descaling is a single-row scale removal spraying header with a pressure value of more than 225 bar.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
edge defects can be effectively reduced or even eliminated by edge folding of the vertical roller; the r value is improved, so that the formability of the strip steel is better; the roughness of the working roll of the F7 frame is improved, and the influence of grinding knife patterns on the surface of the strip steel is eliminated; working rollers from the F1 stand to the F4 stand are high-speed steel rollers and rolling oil input is controlled, the surface quality of the strip steel is improved, and the defect of pressing of iron scales is overcome; the rapid cooling can reduce the cooling difference of the edge part and the center part of the strip steel and improve the uniformity of the structure and the crystal grains of the strip steel.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a hot rolling method for improving the surface quality of a steel sheet according to an embodiment of the present invention;
FIG. 2a shows a schematic representation of an equiaxed ferrite structure at high finishing temperature conditions in accordance with one embodiment of the present disclosure;
FIG. 2b shows a schematic representation of the equiaxed ferrite structure at low finishing temperature conditions in accordance with one embodiment of the present disclosure;
FIG. 3a shows the difference between the microstructure of the surface layer and the microstructure of the core at a high finishing temperature according to an embodiment of the present invention;
fig. 3b shows the difference of the skin structure and the core structure at a low finishing temperature according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Practice ofExample (b)
Fig. 1 is a schematic flow chart illustrating a hot rolling method for improving the surface quality of a steel sheet according to an embodiment of the present invention.
The embodiment provides a hot rolling method for improving the surface quality of a steel plate, which comprises the following steps:
slab continuous casting, heating by a heating furnace, primary high-pressure water descaling, rolling by a roughing mill set (edge folding by an attached vertical roller), head and tail cutting by a shear, secondary high-pressure water descaling, rolling by a seven-stand finishing mill set, cooling treatment and coiling by a coiler;
wherein the side pressure of the vertical roll for edge folding of the vertical roll is 15mm to 35mm, and the cooling treatment is strip steel laminar cooling.
The normal process is a step of a fixed width press, but the fixed width press is only used in the case of large side pressure, and the fixed width press is put into the normal process when the side pressure reaches more than 35 mm; when the pressure measurement is less than 35mm, the slab only passes through the position of the sizing mill, the side pressure is not generated, and the width adjustment (namely the side pressure) is only completed by using the attached vertical roll edge closing on the rough rolling stand.
Through the value of restriction edger roll pressure measurement volume, can reduce or even eliminate limit portion defect, quick cooling can reduce the cooling difference of steel sheet limit portion and core, makes its tissue and crystalline grain more even, and then improves the surface quality of steel sheet.
It should be noted that after the rolling is completed, the steel coils are stacked at a position with good convection ventilation, so as to accelerate the cooling speed.
Furthermore, the heating furnace is a walking beam heating furnace, and the time of the plate blank in the walking beam heating furnace is not longer than 220 min.
The time of the plate blank in the walking beam heating furnace is not longer than 220min, so that the phenomenon that the oxide scales on the surface of the plate blank in the heating furnace grow too thick can be prevented, the oxide scales are not easy to remove in subsequent rolling, and the quality of a steel plate in the subsequent production process is improved.
The walking beam heating furnace can be used for heating the four sides of a plate blank in the furnace, the heat efficiency is high, the heating time is short, the iron oxide scale is few, the decarburization possibility is low, steel sticking can not be generated, the surface of a steel material can not be scratched, black marks can be eliminated, the heating quality is improved, in addition, the energy consumption of the walking beam heating furnace is low, and the operation is flexible and convenient.
Further, the tapping temperature of the plate blank is 1200 ℃ to 1240 ℃, and the finishing temperature of the strip steel is 910 ℃ to 950 ℃.
It should be noted that the coiling temperature of the strip steel is 700 ℃ to 750 ℃, and the higher finishing temperature, tapping temperature and coiling temperature are adopted, so that the defects of stamping stripes of the steel plate can be improved and even eliminated, and the qualification rate of the steel plate is greatly improved.
Further, the seven-stand finishing mill group comprises F1 stands to F7 stands, wherein the working rolls of the F1 stands to the F4 stands are high-speed steel rolls, and the rolling oil input of the seven-stand finishing mill group is controlled.
The rolling oil is usually put into lubrication rolling, which is a function configured in a finishing mill group, a switch can be controlled according to the steel type and the production specification, the function is switched on during the production of the steel plate, the steel plate is lubricated by using the function, the surface quality of the steel plate can be improved, and the generation of the press-in defect of iron scale can be avoided.
Further, the working rolls of the F1 frame to the F7 frame are all finish grinding rolls, wherein the roughness of the working rolls of the F7 frame is not more than 0.8 μm.
The roughness of the working roll of the F7 frame is not more than 0.8 mu m, and the surface quality of the outlet roll of the seven-frame finishing mill group is improved, so that the influence of grinding knife patterns on the surface of the steel plate is eliminated, and the surface quality of the steel plate is improved.
Furthermore, the working roll period of the seven-stand finishing mill group is 10km to 30km, the initial rolling material and the transition material mainly comprise medium carbon steel and low carbon or ultra-low carbon steel with higher coiling temperature, and the target thickness after the plate blank is rolled exceeds 4.0 mm.
The working roll period refers to the length of the strip steel rolled between the seven stands of the finishing mill after all rolls are changed (the working rolls are changed), and the length of the strip steel is calculated by an F7 stand, wherein the initial rolling material and the transition material refer to the requirements on the steel type composition and the process of the rolled steel plate within the first 6km (about 15 steel coils) of the rolling start of the new period.
Generally speaking, a good and favorable working rolling cycle is that after a hot roll and a transition material, a dense and stable oxide film is formed on the surface of the working roll, and measures such as lubrication, roll cooling and the like are matched, so that the optimal surface quality of a steel plate in the working rolling cycle can be obtained; after the rolling length exceeds a certain length, such as 30km, due to the reasons of the rise of the temperature of the roller, the change of the specification of the steel plate, various alternating stresses born by the roller for a long time and the like, the oxide film on the surface of the working roller gradually has uneven thickness, thickened, deteriorated, even peeled and the like, so that the surface defects of the steel plate are generated, the roller is well ironed and transited, the control of the rolling length is realized, and the surface quality of the steel plate rolled in the optimal stage of one working roller period can be ensured.
Further, the front 1/2 use cycle of the support rolls of R1 and R2 of the roughing mill train produces slabs with a width of 1500mm or more, and the rear 1/2 use cycle produces slabs with a width of 1500mm or less.
The roughing train comprises two roughing mills, respectively designated R1 and R2, R1 being two-high mills with roll change cycles of 20 ten thousand tons, R2 being four-high mills with roll change cycles of 7 ten thousand tons and 20 ten thousand tons, respectively, of the support rolls. After one service cycle is finished, if the roll changing cycle is 7 ten thousand tons, namely after 7 ten thousand tons of rolling are finished, the supporting roll needs to be changed, the old supporting roll is removed from the mill for grinding treatment, the automobile sheet production requirement is that the specification of the production width is more than 1500mm in the first half cycle of the supporting roll, and the specification of the production width is less than 1500mm in the second half cycle, so that the purpose is to ensure that an intermediate product (supplied to a finishing mill group) rolled by a roughing mill group has an excellent model (considering the abrasion of the roll shape of the supporting roll).
Further, the first high-pressure water descaling is carried out by two rows of scale removing water spraying headers, the pressure value is more than 225bar, and the second high-pressure water descaling is carried out by a single row of scale removing water spraying headers, and the pressure value is more than 225 bar.
The high-pressure water descaling is respectively arranged in front of a rough rolling unit and a finishing rolling unit, and is designed as a descaling box, namely a first descaling and a second descaling, wherein two descaling water spray headers are arranged in the descaling box, and the design is usually considered for one use and one spare use. In order to ensure the surface quality of an automobile plate, the high-pressure water descaling box in front of the rough rolling unit is required to be put together by two rows of descaling headers, the high-pressure water descaling box in front of the fine rolling unit is required to be put together by one row of headers so as to ensure the descaling effect, and the descaling requirements for two times are both required to be more than 225bar, so that the descaling effect is improved.
The descaling box in front of the roughing mill set adopts a double-row header feeding mode, so that the descaling efficiency is increased when the slab is firstly descaled, and meanwhile, the slab is thick, so that large temperature drop cannot be caused, and the stability of subsequent rolling is ensured.
Comparative example 1
By increasing the finish rolling temperature and the coiling temperature in the hot rolling method according to the hot rolling method of example 1, uniform and fine ferrite grains and coarse and sparse precipitates after rolling can be obtained, and more equiaxed grains can be obtained while longitudinal streak defects are eliminated, and the ductility can be improved, as shown in table 1.
TABLE 1 comparison table of mechanical properties
As can be seen from Table 1, the yield strength, tensile strength and n value are not changed greatly, which indicates that the r value is improved, i.e. the forming performance is improved, on the basis of ensuring the original performance of the steel plate by the increased temperature, so that the formability of the steel plate is better and the quality of the steel plate is improved.
Comparative example 2
FIG. 2a shows a schematic representation of an equiaxed ferrite structure at high finishing temperature conditions in accordance with one embodiment of the present disclosure; FIG. 2b shows a schematic of the equiaxed ferrite structure at low finishing temperature conditions in accordance with one embodiment of the present invention.
As can be seen from the comparison between fig. 2a and fig. 2b, the effect of the high finishing temperature on the strip structure is mainly focused on the uniformity, and the grain structure is larger, which is different from the fine-grained, ferrite equiaxed grain (as shown in fig. 2 a), which is a very favorable structure for the strip, and is beneficial to reducing or eliminating the anisotropy of the structure, whereas if the control is not good, the strip structure (as shown in fig. 2 b) appears, which is larger in anisotropy and has an adverse effect on the performance of the finished strip.
Comparative example 3
FIG. 3a shows the difference between the microstructure of the surface layer and the microstructure of the core at a high finishing temperature according to an embodiment of the present invention; fig. 3b shows the difference of the skin structure and the core structure at a low finishing temperature according to an embodiment of the present invention.
As shown in fig. 3a and fig. 3b, when the temperature difference between the surface layer and the core of the strip steel is large (as shown in fig. 2 b), the difference of the structures in the thickness direction of the strip steel is large, especially when the low-temperature finish rolling is performed, in order to reach the target temperature, a large amount of cooling water enables the cooling speed of the surface and the edge of the strip steel to be far higher than that of the core, so that the local part of the strip steel does not reach the recrystallization temperature of the IF steel, and therefore, a non-recrystallized structure appears on the surface layer, the non-recrystallized structure on the surface layer is inherited to a cold-rolled finished product strip steel, and in the stamping process, a fine and dense 'stripe' defect with alternate light and dark colors appears; the finishing temperature is increased, the unrecrystallized structure (shown in figure 2 a) is reduced or eliminated, and the defect of stamping stripes of the automobile outer plate is eliminated.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. A hot rolling method for improving the surface quality of a steel sheet, characterized by comprising the steps of:
slab continuous casting, heating by a heating furnace, primary high-pressure water descaling, rolling by a roughing mill set (edge folding by an attached vertical roller), head and tail cutting by a shear, secondary high-pressure water descaling, rolling by a seven-stand finishing mill set, cooling treatment and coiling by a coiler;
the side pressure of the vertical roll of the edge closing of the attached vertical roll is 15 mm-35 mm, and the cooling treatment is strip steel laminar cooling.
2. A hot rolling method for improving the surface quality of a steel sheet according to claim 1, wherein the heating furnace is a walking beam heating furnace, and the slab is in the walking beam heating furnace for a time not longer than 220 min.
3. A hot rolling method for improving the surface quality of a steel sheet according to claim 1, characterized in that the tapping temperature of the slab is 1200 ℃ to 1240 ℃ and the finishing temperature of the strip is 910 ℃ to 950 ℃.
4. The hot rolling method for improving the surface quality of a steel sheet according to claim 1, wherein the seven-stand finishing mill group comprises F1 stands to F7 stands, wherein working rolls of the F1 stands to the F4 stands are high-speed steel rolls, and rolling oil input of the seven-stand finishing mill group is controlled.
5. The hot rolling method for improving the surface quality of a steel sheet according to claim 4, wherein the working rolls of the F1 stand to the F7 stand are all finish grinding rolls, and wherein the roughness of the working rolls of the F7 stand is not more than 0.8 μm.
6. A hot rolling method for improving the surface quality of a steel sheet according to claim 4, wherein the work roll period of the seven-stand finishing mill group is 10km to 30km, the initial rolling material and the transition material are mainly medium carbon steel, low carbon steel or ultra-low carbon steel with higher coiling temperature, and the target thickness after the strip steel is rolled exceeds 4.0 mm.
7. A hot rolling method for improving the surface quality of a steel sheet according to claim 1, wherein the first 1/2 of the use period of the supporting rolls of R1 and R2 of the roughing mill train produces a strip having a width of 1500mm or more, and the second 1/2 of the use period produces a strip having a width of 1500mm or less.
8. A hot rolling method according to any one of claims 1 to 7, characterized in that the first high pressure water descaling is a double row descaling header with a pressure value of 225bar or more, and the second high pressure water descaling is a single row descaling header with a pressure value of 225bar or more.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113290047A (en) * | 2021-05-21 | 2021-08-24 | 新余钢铁股份有限公司 | Processing method of low-carbon acid-washing steel substrate |
| CN114192578A (en) * | 2021-12-10 | 2022-03-18 | 武安市裕华钢铁有限公司 | Efficient release process and equipment for rolling efficiency of strip steel |
| CN115058659A (en) * | 2022-06-13 | 2022-09-16 | 首钢集团有限公司 | Medium-high carbon steel with high edge quality and manufacturing method thereof |
| CN116083800A (en) * | 2022-12-30 | 2023-05-09 | 宝钢德盛不锈钢有限公司 | Silver-containing austenitic antibacterial stainless steel and manufacturing method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483521A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket |
| CN1840252A (en) * | 2005-03-28 | 2006-10-04 | 鞍钢集团新钢铁有限责任公司 | Production process of continuous-casting tandem-rolling coiled sheet of medium thick plate |
| CN101811134A (en) * | 2010-01-26 | 2010-08-25 | 宁波钢铁有限公司 | Manufacture method for preventing edge crack generated during low-carbon cold rolling of paper-thin strip steel |
| CN105013819A (en) * | 2015-07-20 | 2015-11-04 | 北京首钢股份有限公司 | Manufacturing method for hot-rolled electrical steel |
| CN105779872A (en) * | 2016-05-12 | 2016-07-20 | 本钢板材股份有限公司 | High-titanium and low-cost Q345B hot-rolled acid washing plate and production method thereof |
| CN106311745A (en) * | 2016-08-29 | 2017-01-11 | 首钢京唐钢铁联合有限责任公司 | Hot-rolling method used for reducing red rust on surface of hot-rolled strip steel |
| CN107812786A (en) * | 2017-09-15 | 2018-03-20 | 宁波钢铁有限公司 | A kind of hot rolling technology for being used to produce the electrical sheet without metal flow accumulation defect |
| CN108411202A (en) * | 2018-04-03 | 2018-08-17 | 本钢板材股份有限公司 | A kind of think gauge cold-rolled biphase steel and preparation method thereof |
| CN111346914A (en) * | 2020-03-18 | 2020-06-30 | 本钢板材股份有限公司 | Hot rolling process method for improving surface quality of automobile outer plate |
-
2020
- 2020-12-09 CN CN202011446344.7A patent/CN112692061A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483521A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket |
| CN1840252A (en) * | 2005-03-28 | 2006-10-04 | 鞍钢集团新钢铁有限责任公司 | Production process of continuous-casting tandem-rolling coiled sheet of medium thick plate |
| CN101811134A (en) * | 2010-01-26 | 2010-08-25 | 宁波钢铁有限公司 | Manufacture method for preventing edge crack generated during low-carbon cold rolling of paper-thin strip steel |
| CN105013819A (en) * | 2015-07-20 | 2015-11-04 | 北京首钢股份有限公司 | Manufacturing method for hot-rolled electrical steel |
| CN105779872A (en) * | 2016-05-12 | 2016-07-20 | 本钢板材股份有限公司 | High-titanium and low-cost Q345B hot-rolled acid washing plate and production method thereof |
| CN106311745A (en) * | 2016-08-29 | 2017-01-11 | 首钢京唐钢铁联合有限责任公司 | Hot-rolling method used for reducing red rust on surface of hot-rolled strip steel |
| CN107812786A (en) * | 2017-09-15 | 2018-03-20 | 宁波钢铁有限公司 | A kind of hot rolling technology for being used to produce the electrical sheet without metal flow accumulation defect |
| CN108411202A (en) * | 2018-04-03 | 2018-08-17 | 本钢板材股份有限公司 | A kind of think gauge cold-rolled biphase steel and preparation method thereof |
| CN111346914A (en) * | 2020-03-18 | 2020-06-30 | 本钢板材股份有限公司 | Hot rolling process method for improving surface quality of automobile outer plate |
Non-Patent Citations (2)
| Title |
|---|
| 周建男: "《轧钢机》", 30 April 2009, 冶金工业出版社 * |
| 张景进等: "《板带冷轧生产》", 30 April 2006, 冶金工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113290047A (en) * | 2021-05-21 | 2021-08-24 | 新余钢铁股份有限公司 | Processing method of low-carbon acid-washing steel substrate |
| CN114192578A (en) * | 2021-12-10 | 2022-03-18 | 武安市裕华钢铁有限公司 | Efficient release process and equipment for rolling efficiency of strip steel |
| CN115058659A (en) * | 2022-06-13 | 2022-09-16 | 首钢集团有限公司 | Medium-high carbon steel with high edge quality and manufacturing method thereof |
| CN116083800A (en) * | 2022-12-30 | 2023-05-09 | 宝钢德盛不锈钢有限公司 | Silver-containing austenitic antibacterial stainless steel and manufacturing method thereof |
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