CN111545568A - Production process of large-reduction cold-rolled ultrathin plate - Google Patents
Production process of large-reduction cold-rolled ultrathin plate Download PDFInfo
- Publication number
- CN111545568A CN111545568A CN202010408489.1A CN202010408489A CN111545568A CN 111545568 A CN111545568 A CN 111545568A CN 202010408489 A CN202010408489 A CN 202010408489A CN 111545568 A CN111545568 A CN 111545568A
- Authority
- CN
- China
- Prior art keywords
- rolled
- rolling
- cold
- producing
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- 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
- B21B2001/221—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 cold-rolling
Abstract
The invention discloses a production process of a cold-rolled ultrathin plate with large reduction, which belongs to the technical field of metallurgical steel rolling, and is characterized in that acid-washing hot-rolled low-carbon steel SPHC with the thickness of 3.0mm is used as a raw material, a large-roll-diameter working roll is adopted to roll the cold-rolled ultrathin plate with the thickness of 0.12-0.18mm by 6 passes, the rolling speed is 500-1000 m/min, the rolling force is 6500-10000 KN, the total reduction rate is 94-96%, and the pass reduction rate is 37-43%.
Description
Technical Field
The invention relates to a production process of a cold-rolled ultrathin plate, in particular to a production process of a cold-rolled ultrathin plate with large reduction, belonging to the technical field of metallurgical steel rolling.
Background
The cold-rolled ultrathin sheet is always paid attention by the cold-rolling industry because of high added value of products and high market demand. For plain carbon steel, a multi-roll mill is typically used to roll the ultra-thin sheet. With the improvement of the control level and the development of the lubrication technology, more and more enterprises adopt a six-roller mill to roll the ultrathin plate, but the method of increasing the number of passes or producing the ultrathin plate after ironing the roller by using the thick plate is generally adopted, and the continuous production of the ultrathin plate cannot be realized.
According to the patent CN201110107889.X of 2.75-0.165 cold-rolled sheet production method disclosed by Hengxing Steel industry Co., Ltd, after each roll change, 2 rolls of cold-rolled sheets with the specification of more than or equal to 0.35 x 1000mm are arranged for ironing, then cold-rolled sheets with the specification of less than or equal to 0.165 x 1000 are arranged, a roll with the diameter of less than 280mm is adopted for rolling, and the thickness of the cold-rolled sheets after rolling is 0.165mm, cannot reach the thickness of ultrathin sheets, is limited by the rolling specification, and cannot realize continuous production of the ultrathin sheets. Patent CN201510100064.3 entitled "Cold Rolling method of extremely thin Steel strip" published by Huachi sheet science and technology Limited, Zhengzhou City, uses a steel strip with a thickness of 0.1-0.2mm rolled in 7 passes and a method of increasing the number of passes to produce the steel strip, but the increase of the number of passes reduces the yield and increases the cost. The patent CN201310283763.7 published by Ji Steel group Limited, a production process of cold-rolled ultra-thin strip steel with large roll diameter and large reduction rate, adopts acid-washed hot-rolled coils with thickness of 1.8-4.0mm as raw materials, and carries out 5-7 passes of rolling to obtain 0.15-0.25mm of ultra-thin strip steel, and adopts a method of increasing passes and adopting thinner hot-rolled raw materials for ultra-thin specification rolling, and the pass reduction rate is between 30-34%.
According to the invention, an acid-washing hot-rolled coil with the thickness of 3.0mm is used as a raw material, an extremely thin product with the specification of 0.12-0.18mm is rolled by 6 times, the minimum thickness can reach 0.12mm, the total reduction rate is 94-96%, the pass reduction rate is 37-43%, and the total reduction rate and the pass reduction rate break through the prior art.
Disclosure of Invention
The invention provides a production process of a cold-rolled extremely thin plate with large rolling reduction, which adopts acid-washing hot-rolled coils with the thickness of 3.0mm as raw materials, and the cold-rolled extremely thin plate with the thickness of only 0.12-0.18mm is rolled in 6 passes, the total rolling reduction is 94-96%, the pass rolling reduction is 37-43%, the prior art is broken through, the production cost of the cold-rolled extremely thin plate is reduced, and the production efficiency of the cold-rolled extremely thin plate is improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a production process of a cold-rolled extremely-thin plate with large rolling reduction comprises the steps of taking acid-washing hot-rolled low-carbon steel SPHC with the thickness of 3.0mm as a raw material, rolling the cold-rolled extremely-thin plate with the thickness of 0.12-0.18mm by adopting a large-roll-diameter working roll for 6 passes, wherein the rolling speed is 500-1000 m/min, the rolling force is 6500-10000 KN, the total rolling reduction is 94-96%, and the pass rolling reduction is 37-43%.
The technical scheme of the invention is further improved as follows: the pass reduction rate of the cold-rolled extremely-thin plate is not less than 39%.
The technical scheme of the invention is further improved as follows: the rolling process of the cold-rolled ultrathin plate adopts high-tension rolling, and the front tension is set to be 15-25 kg/mm2The post tension is set to 20 to 30kg/mm2The tension before pass of the finished product is set to be 10kg/mm for avoiding coil collapse2。
The technical scheme of the invention is further improved as follows: the diameter of the working roll is larger than 300 mm.
The technical scheme of the invention is further improved as follows: the diameter of the working roll is 300-330 mm.
The technical scheme of the invention is further improved as follows: the roughness of the working roll with the diameter of 300-310 mm is 0.6-0.65 mu m, and the roughness of the working roll with the diameter of 310-330 mm is 0.5-0.65 mu m.
The technical scheme of the invention is further improved as follows: the roughness of the working roll with the diameter larger than 330mm is 0.5-0.6 mu m.
The technical scheme of the invention is further improved as follows: the method is characterized in that rolling oil is added in the rolling process of the cold-rolled ultrathin plate, the rolling oil is ionic emulsified oil, the concentration of the rolling oil is 3-4%, the saponification value of the rolling oil is not less than 160mgKOH/g, and the temperature of the rolling oil is adjusted to be 45-50 ℃ in the rolling process.
The technical scheme of the invention is further improved as follows: the flow of the rolling oil under the pressure of 1.0Mpa is 12000m3And blowing by adopting double oil removing rollers and double rows of air knives.
Due to the adoption of the technical scheme, the invention has the technical progress that:
according to the invention, the pickling hot-rolling low-carbon steel SPHC with the thickness of 3.0mm is successfully applied as a raw material, the cold-rolling extremely thin plate with the thickness of 0.12-0.18mm is rolled in 6 passes, the total reduction rate is 94-96%, and the pass reduction rate is 37-43%, so that the single-pass reduction rate and the total reduction rate of the existing single-stand reversible rolling mill are broken through, the production cost of the cold-rolling extremely thin plate is effectively reduced, and the production efficiency of the cold-rolling extremely thin plate is improved.
Drawings
FIG. 1 is a graph of pda according to example 1 of the present invention;
FIG. 2 is a graph of pda according to example 2 of the present invention;
figure 3 is a graph of pda according to example 3 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
a production process of a cold-rolled extremely-thin plate with large rolling reduction comprises the steps of taking acid-washing hot-rolled low-carbon steel SPHC with the thickness of 3.0mm as a raw material, rolling the cold-rolled extremely-thin plate into a cold-rolled extremely-thin plate with the thickness of 0.12-0.18mm by adopting a large-roll-diameter working roll for 6 times, and rolling the cold-rolled extremely-thin plate with large tension, wherein the front tension is set to be 15-25 kg2The post tension is set to 20 to 30kg/mm2Setting 10kg/mm of tension before pass for avoiding coil collapse2. Adding rolling oil in the rolling process, wherein the rolling oil is ionic emulsified oil, the concentration of the rolling oil is 3-4%, the saponification value of the rolling oil is not less than 160mgKOH/g, the temperature of the rolling oil is adjusted to be 45-50 ℃ in the rolling process, and the flow of the rolling oil under the pressure of 1.0Mpa is 12000m3And/min, in order to avoid entrainment caused by large emulsion flow, double oil removing rollers and double-row air knives are adopted for blowing. The rolling speed in the frying process is 500-1000 m/min, the rolling force is 6500-10000 KN, the total reduction rate is 94-96%, and the pass reduction rate is 37-43%. The rolling force is prevented from being increased due to the fact that the pass reduction of the finished product is too small, the roll gap value is small, and the rollers are in contact with each other, and the pass reduction rate of the finished product is not less than 39%.
In addition, the working roll with the large roll diameter is adopted, the diameter of the working roll is larger than 300mm, the diameter of the working roll is preferably 300-330 mm, the roughness of the working roll with the diameter of 300-310 mm is 0.6-0.65 mu m, the roughness of the working roll with the diameter of 310-330 mm is 0.5-0.65 mu m, and the roughness of the working roll with the diameter of larger than 330mm is 0.5-0.6 mu m.
Example 1:
the 3.0mm SPHC pickled hot rolled plate is rolled by 6 passes to be 0.18mm ultrathin plate, and the rolling parameters are shown in the table 1.
Table 1 rolling parameters of example 1
When the set thickness, rolling force and thickness difference were measured on the rolled 0.18mm ultrathin sheet, the graph of the set thickness, rolling force and thickness difference pda was shown in FIG. 1.
Example 2:
the 3.0mm SPHC pickled hot rolled plate is rolled by 6 passes to be 0.15mm ultrathin plate, and the rolling parameters are shown in the table 2.
Table 2 rolling parameters for example 2
When the set thickness, rolling force and thickness difference were measured on the rolled 0.15mm ultrathin sheet, the graph of the set thickness, rolling force and thickness difference pda was shown in FIG. 2.
Example 3:
the 3.0mm SPHC pickled hot rolled plate is rolled by 6 passes to be 0.12mm ultrathin plate, and the rolling parameters are shown in the table 3.
Table 3 rolling parameters for example 3
When the set thickness, rolling force and thickness difference were measured on the rolled 0.12mm ultrathin sheet, the graph of the set thickness, rolling force and thickness difference pda was shown in FIG. 3.
Claims (9)
1. A production process of a large-reduction cold-rolled ultra-thin plate is characterized by comprising the following steps of: acid-washing hot-rolled low-carbon steel SPHC with the thickness of 3.0mm is used as a raw material, a large-roll-diameter working roll is adopted to roll the steel into a cold-rolled ultrathin plate with the thickness of 0.12-0.18mm by 6 passes, the rolling speed is 500-1000 m/min, the rolling force is 6500-10000 KN, the total reduction rate is 94-96%, and the pass reduction rate is 37-43%.
2. The process for producing a high reduction cold-rolled ultra-thin sheet as claimed in claim 1, wherein: the pass reduction rate of the cold-rolled extremely-thin plate is not less than 39%.
3. The process for producing a high reduction cold-rolled ultra-thin sheet as claimed in claim 1, wherein: the rolling process of the cold-rolled ultrathin sheet adopts large-tension rolling, the front tension is set to 15-25 kg/mm, the rear tension is set to 20-30 kg/mm, and the front tension of the finished product pass is set to avoid collapsing to be 10 kg/mm.
4. The process for producing a high reduction cold-rolled ultra-thin sheet as claimed in claim 3, wherein: the diameter of the working roll is larger than 300 mm.
5. The process for producing a high reduction cold-rolled ultra-thin sheet as claimed in claim 4, wherein: the diameter of the working roll is 300-330 mm.
6. A process for producing a high reduction cold-rolled ultra-thin sheet as claimed in claim 4 or 5, wherein: the roughness of the working roll with the diameter of 300-310 mm is 0.6-0.65 mu m, and the roughness of the working roll with the diameter of 310-330 mm is 0.5-0.65 mu m.
7. The process for producing a high reduction cold-rolled ultra-thin sheet as claimed in claim 3, wherein: the roughness of the working roll with the diameter larger than 330mm is 0.5-0.6 mu m.
8. The process for producing a high reduction cold-rolled ultra-thin sheet as claimed in claim 1, wherein: the method is characterized in that rolling oil is added in the rolling process of the cold-rolled ultrathin plate, the rolling oil is ionic emulsified oil, the concentration of the rolling oil is 3-4%, the saponification value of the rolling oil is not less than 160mgKOH/g, and the temperature of the rolling oil is adjusted to be 45-50 ℃ in the rolling process.
9. The process for producing a high reduction cold-rolled ultra-thin sheet as claimed in claim 8, wherein: and the flow of the rolling oil under the pressure of 1.0MPa is 12000m and/or min, and double oil removing rollers and double rows of air knives are adopted for blowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010408489.1A CN111545568A (en) | 2020-05-14 | 2020-05-14 | Production process of large-reduction cold-rolled ultrathin plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010408489.1A CN111545568A (en) | 2020-05-14 | 2020-05-14 | Production process of large-reduction cold-rolled ultrathin plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111545568A true CN111545568A (en) | 2020-08-18 |
Family
ID=71998661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010408489.1A Pending CN111545568A (en) | 2020-05-14 | 2020-05-14 | Production process of large-reduction cold-rolled ultrathin plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111545568A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012232318A (en) * | 2011-04-28 | 2012-11-29 | Jfe Steel Corp | Method for removing impurities on steel plate |
| CN103357656A (en) * | 2013-07-08 | 2013-10-23 | 济钢集团有限公司 | Manufacturing technology of cold rolling ultrathin strip steel with large roller diameter and high screw-down rate |
| CN104646417A (en) * | 2015-03-06 | 2015-05-27 | 郑州市华驰薄板科技有限公司 | Cold rolling method of ultra thin steel strip |
| CN108906890A (en) * | 2018-06-29 | 2018-11-30 | 西北有色金属研究院 | A kind of cold-rolling method of beta-titanium alloy thin plate |
-
2020
- 2020-05-14 CN CN202010408489.1A patent/CN111545568A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012232318A (en) * | 2011-04-28 | 2012-11-29 | Jfe Steel Corp | Method for removing impurities on steel plate |
| CN103357656A (en) * | 2013-07-08 | 2013-10-23 | 济钢集团有限公司 | Manufacturing technology of cold rolling ultrathin strip steel with large roller diameter and high screw-down rate |
| CN104646417A (en) * | 2015-03-06 | 2015-05-27 | 郑州市华驰薄板科技有限公司 | Cold rolling method of ultra thin steel strip |
| CN108906890A (en) * | 2018-06-29 | 2018-11-30 | 西北有色金属研究院 | A kind of cold-rolling method of beta-titanium alloy thin plate |
Non-Patent Citations (1)
| Title |
|---|
| 江东海: "六辊轧机极薄带钢可逆轧制分析", 《冶金设备》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111530926B (en) | Control method for peeling edge of strip steel in rough rolling and strip steel | |
| CN102921750B (en) | Method for removing bright trace on surface of strip steel | |
| CN111097798A (en) | Stable production method of hot-rolled thin-specification ultrahigh-strength quenched ductile steel | |
| CN102366761A (en) | Method for preventing end curling of hot-rolled stainless steel | |
| CN114107622B (en) | Production method of cold-rolled nickel-saving austenitic stainless steel 8K mirror surface | |
| CN110860561A (en) | Method for coordinately controlling straight section of electrical steel through short-process cold rolling and hot rolling | |
| CN109622619A (en) | The method and its product of cold continuous rolling production high grade non-oriented electrical steel | |
| CN111570509B (en) | Titanium strip rolling method for hot continuous rolling strip steel production line | |
| CN111545568A (en) | Production process of large-reduction cold-rolled ultrathin plate | |
| CN217948225U (en) | Strip processing production line containing secondary rolling process | |
| CN108284133B (en) | Ultra-thin steel strip rolling process method for single-stand reversible rolling mill | |
| CN103272841B (en) | Cold rolling technology of stainless steel clad plate strip coil | |
| CN115672980A (en) | Preparation process of stainless steel ultra-thin strip | |
| CN113617843B (en) | Method for eliminating residual stress of hot-rolled strip steel at high temperature | |
| CN110369515B (en) | Variable-specification strip threading control method for thin strip of hot-aluminum continuous rolling unit | |
| CN210023245U (en) | System for producing hot formed steel by continuous casting and rolling | |
| CN110385339B (en) | Leveling method of semi-process steel | |
| CN210023244U (en) | System for producing cold-formed steel material by continuous casting and rolling | |
| CN112676341A (en) | Hot rolling method of low-carbon steel | |
| CN216226149U (en) | Vertical roll structure and roughing mill | |
| CN113828633B (en) | Rolling method of wide flange H-shaped steel | |
| CN114985474B (en) | Process method for online roll changing of dynamic dislocation regulation of DS rolling mill unit | |
| CN101147919B (en) | Method for reducing cold rolled galvanized plate surface defect with CSP hot rolled coil as raw material | |
| JP3815245B2 (en) | Manufacturing method of high hardness and high carbon steel sheet | |
| CN114525391B (en) | Production process of high-carbon tool steel cold-rolled sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Dong Weike Inventor after: Li Zengqiang Inventor after: Shen Ximin Inventor after: Zhai Xiaobing Inventor after: Li Pengfei Inventor after: Wu Aiyi Inventor before: Dong Weike Inventor before: Li Zengqiang Inventor before: Zhai Xiaobing Inventor before: Li Pengfei Inventor before: Wu Aiyi |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200818 |