CN108714624B - Processing method of low-carbon aluminum killed steel pickled plate - Google Patents
Processing method of low-carbon aluminum killed steel pickled plate Download PDFInfo
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- CN108714624B CN108714624B CN201810387617.1A CN201810387617A CN108714624B CN 108714624 B CN108714624 B CN 108714624B CN 201810387617 A CN201810387617 A CN 201810387617A CN 108714624 B CN108714624 B CN 108714624B
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- killed steel
- aluminum killed
- carbon aluminum
- rolling
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 36
- 229910000655 Killed steel Inorganic materials 0.000 title claims abstract description 35
- 238000003672 processing method Methods 0.000 title claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 38
- 238000005554 pickling Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- 238000010079 rubber tapping Methods 0.000 claims description 26
- 230000002441 reversible effect Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 34
- 238000010422 painting Methods 0.000 abstract description 19
- 229910052742 iron Inorganic materials 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 15
- 239000000047 product Substances 0.000 description 20
- 239000010410 layer Substances 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000013067 intermediate product Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000374 eutectic mixture Substances 0.000 description 1
- 229910052840 fayalite Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
-
- 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
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B2001/225—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 plates, strips, bands or sheets of indefinite length by hot-rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a processing method of a low-carbon aluminum killed steel pickled plate, wherein the pickled plate is a pickled plate finished product formed by the steps of heating, rough rolling, finish rolling, cooling, coiling and pickling of a plate blank, and the method further comprises the following steps: the mass content of silicon in the low-carbon aluminum killed steel is controlled to be below 0.03 percent. The method solves the technical problem of serious landscape painting on the surface of the low-carbon aluminum killed steel pickled plate, and achieves the technical effects of reducing iron scales, removing the iron scales to the maximum extent and controlling the appearance of the landscape painting.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a processing method of a low-carbon aluminum killed steel pickled plate.
Background
The acid pickling plate is an intermediate product which takes a high-quality hot-rolled sheet as a raw material and is subjected to oxide layer removal by an acid pickling unit, and the surface quality and the use requirement of the intermediate product are between those of a hot-rolled plate and a cold-rolled plate, so that the acid pickling plate has high cost performance and development prospect, and is widely applied to the industries of automobiles and household appliances.
However, in the process of implementing the technical solution in the embodiment of the present application, the inventor of the present application finds that the above prior art has at least the following technical problems:
landscape paintings generally exist on the surface of a low-carbon aluminum killed steel pickled plate, and have great influence on subsequent electroplating and electrophoresis processing technologies. The method is a defect of winding and filiform distribution similar to a landscape painting in a traditional Chinese painting on the surface of a low-carbon aluminum killed steel pickling plate.
Relevant researches show that a substance with strong adhesion and mainly comprising iron oxide on the surface layer of strip steel is the root cause for generating the landscape painting, the main component of the substance is FeO/Fe2SiO4 eutectic mixture, the substance is easy to appear in steel with the Si content of more than 0.5 percent, macroscopically and obviously shows red rust defects, while the low-carbon aluminum killed steel has relatively low Si content, the red rust defects can not be macroscopically shown but can be microscopically gathered, so the defects can not be found in the hot rolling process and can be shown after acid washing, and the effect of improving the landscape painting by adjusting acid washing process parameters is not obviously shown
Disclosure of Invention
The invention provides a processing method of a low-carbon aluminum killed steel pickled plate, which solves the technical problem of serious landscape painting on the surface of the low-carbon aluminum killed steel pickled plate, and achieves the technical effects of reducing iron scales, removing the iron scales to the maximum degree and controlling the landscape painting.
The invention provides a processing method of a low-carbon aluminum killed steel pickled plate, wherein the pickled plate is a pickled plate finished product formed by the steps of heating, rough rolling, finish rolling, cooling, coiling and pickling of a plate blank, and the method further comprises the following steps: the mass content of silicon in the low-carbon aluminum killed steel is controlled to be below 0.03 percent.
Preferably, the method further comprises: and under the condition of ensuring enough tapping time, controlling the tapping temperature of the low-carbon aluminum killed steel to be between 1130 and 1200 ℃ according to different thickness layers of the hot rolled finished product.
Preferably, the method further comprises: when the thickness of the hot-rolled finished product is [2.0,3.0mm), the tapping temperature is reduced to 1180-1200 ℃.
Preferably, the method further comprises: when the thickness of the hot-rolled finished product is [3.0,5.0mm), the tapping temperature is reduced to 1130-1180 ℃.
Preferably, the method further comprises: when the thickness of the hot rolled product is [5.0,6.0], the tapping temperature is reduced to 1130-1170 ℃.
Preferably, the method further comprises: the two reversible rolling mills for rough rolling are rolled for 6 times.
Preferably, the method further comprises: 6 passes of the two reversible rolling mills for rough rolling adopt a 3+3 mode.
Preferably, the method further comprises: in 6 passes of rough rolling, the rough descaling pass is promoted to 5-6 passes, the first pass descaling of rough rolling R1 and R2 is ensured, and R2 has at least one reverse pass descaling.
Preferably, the method further comprises: in the finish rolling process, the F1-F4 anti-stripping water is completely opened, and the pressure of the descaling water between the racks is more than or equal to 20 MPa.
One or more technical solutions in the embodiments of the present invention at least have one or more of the following technical effects:
1. the embodiment of the invention provides a processing method of a low-carbon aluminum killed steel pickled plate, which is characterized in that a finished pickled plate is formed by a plate blank through the steps of heating, rough rolling, finish rolling, cooling, coiling and pickling, wherein the method further comprises the following steps: the mass content of silicon in the low-carbon aluminum killed steel is controlled to be below 0.03 percent. The method solves the technical problem of serious landscape painting on the surface of the low-carbon aluminum killed steel pickled plate, and achieves the technical effects of reducing iron scales, removing the iron scales to the maximum extent and controlling the appearance of the landscape painting.
2. The tapping temperature of the low-carbon aluminum killed steel is controlled to be 1130-1200 ℃ according to different thickness layers of a hot rolled finished product under the condition of ensuring enough tapping time, so that the heating temperature of a plate blank in a hot rolling link is greatly reduced, and the technical effect of avoiding the generation of a landscape painting after pickling on the aspect of the generation condition of a sticky iron sheet is achieved by controlling the parameters of a processing process.
3. According to the embodiment of the invention, in 6 passes of rough rolling, the rough descaling pass is increased to 5-6 passes, so that the first pass of rough rolling R1 and R2 is guaranteed, and at least one reverse pass of R2 is used for descaling, and the technical effect of removing the generated scale to the maximum extent is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
FIG. 1 is a flow chart of a method for processing a low-carbon aluminum killed pickled steel plate according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a processing method of a low-carbon aluminum killed steel pickled plate, which solves the technical problem of serious landscape painting on the surface of the low-carbon aluminum killed steel pickled plate, and achieves the technical effects of reducing iron scales, removing the iron scales to the maximum degree and controlling the appearance of the landscape painting.
The technical scheme in the embodiment of the invention has the following overall structure:
the invention provides a processing method of a low-carbon aluminum killed steel pickled plate, wherein the pickled plate is a pickled plate finished product formed by the steps of heating, rough rolling, finish rolling, cooling, coiling and pickling of a plate blank, and the method further comprises the following steps: the mass content of silicon in the low-carbon aluminum killed steel is controlled to be below 0.03 percent. The method solves the technical problem of serious landscape painting on the surface of the low-carbon aluminum killed steel pickled plate, and achieves the technical effects of reducing iron scales, removing the iron scales to the maximum extent and controlling the appearance of the landscape painting.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment of the invention provides a processing method of a low-carbon aluminum killed steel pickled plate, which refers to fig. 1, wherein a pickled plate finished product is formed by a plate blank through the steps of heating, rough rolling, finish rolling, cooling, coiling and pickling; wherein the method further comprises: the mass content of silicon in the low-carbon aluminum killed steel is controlled to be below 0.03 percent.
Specifically, the low-carbon aluminum killed steel pickled plate is formed by the steps of heating, rough rolling, finish rolling, cooling, coiling and pickling of the plate blank. And the silicon content of the plate blank for steelmaking production needs to be controlled below 0.03 percent, so that the plate blank processed by the steps can be ensured to be a qualified finished product of the pickled plate. On the premise of ensuring enough in-furnace time, the tapping temperature of the low-carbon aluminum killed steel is controlled, the tapping temperature is reduced to 1130-plus-1200 ℃ according to different thickness layers of a hot rolled finished product, and the finish rolling temperature and the coiling temperature are kept unchanged. According to different thickness layers of the hot rolled finished product, the tapping temperature is reduced to 1130-1200 ℃, and the finishing temperature and the coiling temperature are kept unchanged. In addition, the rough rolling descaling pass is increased to 5-6 passes, the first pass descaling of R1 and R2 is ensured, and R2 has at least one reverse pass descaling
Further, the method further comprises: and under the condition of ensuring enough tapping time, controlling the tapping temperature of the low-carbon aluminum killed steel to be between 1130 and 1200 ℃ according to different thickness layers of the hot rolled finished product.
Further, the method further comprises: when the thickness of the hot-rolled finished product is [2.0,3.0mm), the tapping temperature is reduced to 1180-1200 ℃.
Further, the method further comprises: when the thickness of the hot-rolled finished product is [3.0,5.0mm), the tapping temperature is reduced to 1130-1180 ℃.
Further, the method further comprises: when the thickness of the hot rolled product is [5.0,6.0], the tapping temperature is reduced to 1130-1170 ℃.
Specifically, the thickness and tapping temperature of the hot-rolled finished product are different in order to ensure the quality of the pickled plate. When the thickness of the hot-rolled finished product is [2.0,3.0mm), the tapping temperature is reduced to 1180-1200 ℃; when the thickness of the hot-rolled finished product is [3.0,5.0mm), the tapping temperature is reduced to 1130-1180 ℃; when the thickness of the hot rolled product is [5.0,6.0], the tapping temperature is reduced to 1130-1170 ℃.
Further, the method further comprises: the two reversible rolling mills for rough rolling are rolled for 6 times.
Further, the method further comprises: in 6 passes of rough rolling, the rough descaling pass is promoted to 5-6 passes, the first pass descaling of rough rolling R1 and R2 is ensured, and R2 has at least one reverse pass descaling.
Specifically, in 6 passes of rough rolling, the rough descaling pass is increased to 5-6 passes, the first pass of rough rolling R1 and R2 is guaranteed to be descaled, and R2 has at least one reverse pass to descale. In 6 passes of rough rolling, except the last pass, the other 5 passes are descaled, so that the technical effects of reducing the generation of iron scales and removing the generated iron scales to the maximum degree are achieved.
Further, the method further comprises: 6 passes of the two reversible rolling mills for rough rolling adopt a 3+3 mode.
Specifically, when the pickled plate is produced, the rough rolling and the two reversible rolling mills carry out 6 passes in total, and the two reversible rolling mills have two modes of 3+3 and 1+5, wherein the 3+3 mode is preferably selected.
Further, the method further comprises: in the finish rolling process, the F1-F4 anti-stripping water is completely opened, the pressure of the descaling water between the racks is more than or equal to 20MPa, and the technical effect of removing the generated iron scale to the maximum extent is achieved.
One or more technical solutions in the embodiments of the present invention at least have one or more of the following technical effects:
1. the embodiment of the invention provides a processing method of a low-carbon aluminum killed steel pickled plate, which is characterized in that a finished pickled plate is formed by a plate blank through the steps of heating, rough rolling, finish rolling, cooling, coiling and pickling, wherein the method further comprises the following steps: the mass content of silicon in the low-carbon aluminum killed steel is controlled to be below 0.03 percent. The method solves the technical problem of serious landscape painting on the surface of the low-carbon aluminum killed steel pickled plate, and achieves the technical effects of reducing iron scales, removing the iron scales to the maximum extent and controlling the appearance of the landscape painting.
2. The tapping temperature of the low-carbon aluminum killed steel is controlled to be 1130-1200 ℃ according to different thickness layers of a hot rolled finished product under the condition of ensuring enough tapping time, so that the heating temperature of a plate blank in a hot rolling link is greatly reduced, and the technical effect of avoiding the generation of a landscape painting after pickling on the aspect of the generation condition of a sticky iron sheet is achieved by controlling the parameters of a processing process.
3. According to the embodiment of the invention, in 6 passes of rough rolling, the rough descaling pass is increased to 5-6 passes, so that the first pass of rough rolling R1 and R2 is guaranteed, and at least one reverse pass of R2 is used for descaling, and the technical effect of removing the generated scale to the maximum extent is achieved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (4)
1. The processing method of the low-carbon aluminum killed steel pickled plate is characterized in that the pickled plate is formed by a plate blank through the steps of heating, rough rolling, finish rolling, cooling, coiling and pickling, wherein the method further comprises the following steps:
the mass content of silicon in the low-carbon aluminum killed steel is controlled to be below 0.03 percent;
under the condition of ensuring enough tapping time, controlling the tapping temperature of the low-carbon aluminum killed steel to be between 1130 and 1200 ℃ according to different thickness layers of the hot rolled finished product;
when the thickness of the hot-rolled finished product is [2.0,3.0mm), the tapping temperature is reduced to 1180-1200 ℃;
when the thickness of the hot-rolled finished product is [3.0,5.0mm), the tapping temperature is reduced to 1130-1180 ℃;
when the thickness of the hot-rolled finished product is [5.0,6.0mm ], the tapping temperature is reduced to 1130-1170 ℃;
the two reversible rolling mills for rough rolling are rolled for 6 times.
2. The process of claim 1, wherein the process further comprises:
6 passes of the two reversible rolling mills for rough rolling adopt a 3+3 mode.
3. The process of claim 1, wherein the process further comprises:
in 6 passes of rough rolling, the rough descaling pass is increased to 5-6 passes, the first descaling of two reversible rolling mills R1 and R2 for rough rolling is ensured, and at least one reverse descaling is carried out on R2.
4. The process of claim 1, wherein the process further comprises:
in the finish rolling process, the anti-stripping water of the finish rolling mill F1-F4 is completely opened, and the pressure of the descaling water between the racks is more than or equal to 20 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810387617.1A CN108714624B (en) | 2018-04-26 | 2018-04-26 | Processing method of low-carbon aluminum killed steel pickled plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810387617.1A CN108714624B (en) | 2018-04-26 | 2018-04-26 | Processing method of low-carbon aluminum killed steel pickled plate |
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| CN108714624B true CN108714624B (en) | 2020-02-07 |
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| CN110438329B (en) * | 2019-07-23 | 2022-07-19 | 北京首钢股份有限公司 | Method for eliminating skin warping defect of boron-containing low-carbon aluminum killed steel strip |
| CN113245367A (en) * | 2021-04-16 | 2021-08-13 | 首钢集团有限公司 | Method for reducing surface reticulate pattern defects of low-carbon aluminum killed steel pickled plate |
| 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 |
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| JP3390584B2 (en) * | 1995-08-31 | 2003-03-24 | 川崎製鉄株式会社 | Hot rolled steel sheet and method for producing the same |
| CN105316579B (en) * | 2014-07-29 | 2017-05-24 | 上海梅山钢铁股份有限公司 | Thin hot rolled pickled steel plate and fabrication method thereof for water heater enamel liner |
| CN105689408A (en) * | 2016-03-07 | 2016-06-22 | 首钢京唐钢铁联合有限责任公司 | Hot rolling control method for iron scale on edge of low-carbon aluminum killed steel |
| CN106282766B (en) * | 2016-08-18 | 2017-11-28 | 武汉钢铁有限公司 | The 500MPa pickling steel and its production method of low surface roughness |
| CN106311745B (en) * | 2016-08-29 | 2018-12-14 | 首钢京唐钢铁联合有限责任公司 | Hot rolling method for reducing red rust on surface of hot-rolled strip steel |
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