CN109332417B - Thin-specification checkered plate and production method thereof - Google Patents
Thin-specification checkered plate and production method thereof Download PDFInfo
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- CN109332417B CN109332417B CN201810347775.4A CN201810347775A CN109332417B CN 109332417 B CN109332417 B CN 109332417B CN 201810347775 A CN201810347775 A CN 201810347775A CN 109332417 B CN109332417 B CN 109332417B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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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
- B21B1/22—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
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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
- B21B1/22—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
- B21B1/227—Surface roughening or texturing
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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
- B21B45/02—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 lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
-
- 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
-
- 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
- B21B45/02—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 lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B2045/0212—Cooling devices, e.g. using gaseous coolants using gaseous coolants
Abstract
A thin specification checkered plate and a production method thereof are as follows: the molten steel with qualified components is smelted in a converter or an electric furnace, the molten steel is cast into a casting strip with the thickness of 1.4-2.2 mm through a pair of counter-rotating casting rolls, the continuous casting speed is less than or equal to 80m/min, the casting strip is rolled into hot-rolled strip steel with the thickness of 0.7-2.0 mm through one-pass or two-pass hot rolling, the finish rolling temperature is 1050-1200 ℃, the hot rolling speed is less than or equal to 120m/min, the hot-rolled strip steel is rolled into a patterned plate with the surface in a shape of a mixture of a lentil shape, a rhombus shape, a round bean shape or a flat circle shape through a patterned rolling mill, and then the hot-rolled. The checkered plate has the advantages of low production cost, short flow, thin thickness, high strength, excellent plate shape and excellent pattern quality.
Description
Technical Field
The invention relates to a short-flow, low-cost, thin-specification and high-strength checkered plate and a production method thereof.
Background
The checkered plate has good anti-skid and wear-resistant functions, has the characteristics of easiness in cleaning, steel saving and the like, and is widely applied to industries such as buildings, ships, transportation, mechanical manufacturing and the like. The pattern plate mainly has a hyacinth bean shape, a diamond shape and a round bean shape, the pattern belongs to an open type, and is attractive and elegant, good in anti-skid effect, convenient to remove water and oil dirt, wear-resistant and widely applied to the market.
At present, the thickness of the pattern plate used in the market is generally more than 2.5 mm. The 2.5-3.0 mm checkered plate can completely replace a 4.0mm flat plate in the building and machinery manufacturing industry, and the steel can be saved by 220kg per ton. In addition, when the checkered plate is used in the fields of ships, automobiles, buildings and the like, the checkered plate should be lightened as much as possible on the premise of not influencing the use performance and the appearance. If the thickness specification of the checkered plate is reduced, the strength of the checkered plate is improved, and the using amount of steel is greatly reduced.
However, the thin checkered plate has short rolling deformation zone, the friction coefficients of the checkered roller, the corresponding flat roller and the strip steel are inconsistent, and the dead weight of the strip steel is small, so that the problem of groove stripping is easily caused. In addition, the plate shape problem is caused by large rolling reduction of the last frame, the upward floating problem is caused by high running speed on a hot output roller way, the head folding problem is caused during winding, and the like, so that the production of the thin-specification checkered plate is extremely difficult. The production of thin hot-rolled strip steel by domestic and foreign hot continuous rolling units also has certain rolling difficulty, so that the yield of the thin checkered plates is extremely low.
The invention provides a thin checkered plate with short flow, low cost and high efficiency and a production method thereof, aiming at the application and development trend of checkered plates at home and abroad.
Disclosure of Invention
The invention overcomes the production difficulty of the existing thin checkered plate, provides the thin checkered plate with short flow, low cost and high efficiency and the production method thereof, ensures the strength and the beauty of the checkered plate, and realizes the high reinforcement and the light weight of the checkered plate.
The measures for realizing the aim are as follows:
the production method of the thin-specification checkered plate comprises the following steps:
(1) smelting molten steel with qualified components by a converter or an electric furnace, and forming a continuous casting belt by a pair of copper casting rollers rotating in opposite directions;
(2) rolling the cast strip into thin hot rolled strip steel through one-time hot rolling;
(3) and a pattern rolling mill is arranged behind the first frame hot rolling mill to roll the upper surface of the hot-rolled strip steel into a designed pattern shape.
(4) And cooling the rolled checkered plate, and coiling the checkered plate into a coil.
Preferably, the molten steel passes through a pair of rotary casting rollers to form a casting strip, the continuous casting speed of the casting strip is less than or equal to 80m/min, and the thickness of the formed casting strip is 1.4-2.2 mm.
Preferably, the cast strip is rolled into a hot-rolled strip with the thickness of 0.7-2.0 mm through one-time hot rolling.
Preferably, a second hot rolling stand is added after the first hot rolling stand to reduce the hot rolling reduction of each pass and ensure the shape of the thin hot rolled strip.
Preferably, the hot rolling speed is 120m/min or less.
Preferably, the hot rolling finish rolling temperature is 1050-1200 ℃.
Preferably, the hot-rolled strip steel is rolled into a checkered plate with the surface in a shape of a hyacinth bean, a rhombus, a round bean or a flat and round mixed shape by a checkered rolling mill.
Preferably, the cooling mode after the hot-rolled checkered plate is air fog cooling, so that the influence of accumulated water on the surface of the checkered plate on the plate shape is avoided.
Preferably, the coiling temperature of the hot-rolled checkered plate is 250-500 ℃.
Preferably, the cooling mode after the hot-rolled pattern plate is an air injection cooling mode, so that accumulated water on the surface of the pattern plate is eliminated.
Preferably, the molten steel composition is carbon steel, weathering steel, stainless steel or the like.
In another aspect, the invention also provides a thin-specification checkered plate which is produced by using the production method.
The invention has the beneficial technical effects that:
(1) the continuous production of the thin checkered plate is realized, the production flow is short, the production cost is low, the production efficiency is high, and the yield is high.
(2) The mass production of the thin checkered plates is realized, and the thinnest thickness reaches 0.7 mm.
(3) The lower hot rolling speed is adopted, the problems of meat falling, roller abrasion and poor edge quality in the pattern rolling process are avoided, and the production efficiency of the pattern plate and the quality of the pattern plate are improved.
(4) The steel plate is cooled by adopting an aerial fog cooling mode after the checkered plate is rolled, so that the water quantity of cooling water is reduced, the water fog is uniformly distributed on the surface of the steel plate, the local accumulation of the cooling water on the surface of the steel plate is reduced, and the uniformity of the shape and the strength of the checkered plate is ensured.
(5) The steel plate is cooled by adopting an air injection cooling mode after the checkered plate is rolled, so that the influence of cooling water on the plate shape is avoided, and the quality of the checkered plate is improved.
(6) The coiling temperature is 250-500 ℃, the coiling temperature is reduced, the strength of the steel plate is improved, and the thin specification, light weight and high reinforcement of the checkered plate are realized.
Drawings
FIG. 1 shows a steel sheet topography according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The present invention is described in detail below:
the steel grade components of the following examples are all in the following mass percentage content: c: 0.003-0.06%, Si: 0.05-6.0%, Mn: 0.3-5.0%, P: 0.03-0.15%, Cu: not less than 0.1%, Cr: less than or equal to 30 percent, Ni: less than or equal to 15 percent, Nb: 0.001 to 0.50%, Ti: 0.01 to 0.50%, Mo: 0.01 to 0.20% by weight, and the balance Fe and inevitable impurities.
Example 1
(1) Smelting molten steel with qualified components by a converter or an electric furnace, and forming a continuous casting strip by a pair of copper casting rolls rotating in the reverse direction, wherein the thickness of the casting strip is 1.8mm, and the continuous casting speed is 50 m/min;
(2) rolling the cast strip into thin hot rolled strip steel by two times of hot rolling, wherein the thickness of the hot rolled strip steel is 0.7mm, the finish rolling temperature is 1150 ℃, and the rolling speed is 120 m/min;
(3) and a pattern rolling mill is arranged behind the hot rolling mill of the second frame, and the upper surface of the hot-rolled strip steel is rolled into a hyacinth bean pattern shape.
(4) And cooling the rolled checkered plate in a mode of aerial fog cooling, and coiling the checkered plate into a coil at the coiling temperature of 250 ℃.
The surface inspection is carried out on the checkered plate, and the rolled checkered plate has beautiful patterns and good plate shape.
Example 2
(1) Smelting molten steel with qualified components by a converter or an electric furnace, and forming a continuous casting strip by a pair of copper casting rolls rotating in the reverse direction, wherein the thickness of the casting strip is 2.2mm, and the continuous casting speed is 40 m/min;
(2) rolling the cast strip into thin hot rolled strip steel by one-time hot rolling, wherein the thickness of the hot rolled strip steel is 2.0mm, the finish rolling temperature is 1050 ℃, and the rolling speed is 80 m/min;
(3) and a pattern rolling mill is arranged behind the first frame hot rolling mill, and the upper surface of the hot-rolled strip steel is rolled into a rhombus pattern shape.
(4) And cooling the rolled checkered plate in a manner of air injection cooling, and coiling the checkered plate into a coil at the coiling temperature of 300 ℃.
The surface inspection is carried out on the checkered plate, and the rolled checkered plate has beautiful patterns and good plate shape.
Example 3
(1) Smelting molten steel with qualified components by a converter or an electric furnace, and forming a continuous casting strip by a pair of copper casting rolls rotating in the reverse direction, wherein the thickness of the casting strip is 1.4mm, and the continuous casting speed is 75 m/min;
(2) rolling the cast strip into thin hot rolled strip steel by one-time hot rolling, wherein the thickness of the hot rolled strip steel is 1.1mm, the finish rolling temperature is 1180 ℃, and the rolling speed is 110 m/min;
(3) and a pattern rolling mill is arranged behind the first frame hot rolling mill, and the upper surface of the hot-rolled strip steel is rolled into a round bean-shaped pattern shape.
(4) And cooling the rolled checkered plate in a manner of air injection cooling, and coiling the checkered plate into a coil at the coiling temperature of 480 ℃.
The surface inspection is carried out on the checkered plate, and the rolled checkered plate has beautiful patterns and good plate shape.
The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.
Claims (9)
1. The production method of the thin-specification checkered plate is characterized by comprising the following steps of:
(1) smelting molten steel with qualified components by a converter or an electric furnace, and forming a continuous casting strip by a pair of copper casting rolls rotating in opposite directions, wherein the continuous casting speed is less than or equal to 80 m/min;
(2) the cast strip is rolled into thin hot-rolled strip steel through two times of hot rolling, wherein the hot rolling reduction of each time is reduced, the plate shape of the thin hot-rolled strip steel is ensured, and the hot rolling speed is less than or equal to 120 m/min;
(3) a pattern rolling mill is arranged behind the hot rolling mill of the second frame, and the upper surface of the hot-rolled strip steel is rolled into a designed pattern shape;
(4) and carrying out aerial fog cooling on the rolled checkered plate, and coiling the checkered plate into a coil.
2. The production method according to claim 1, wherein: the molten steel comprises carbon steel, weathering steel or stainless steel.
3. The production method according to claim 1, wherein: the molten steel passes through a pair of rotary casting rollers to form a casting strip, the continuous casting speed of the casting strip is less than or equal to 75m/min, and the thickness of the formed casting strip is 1.4-2.2 mm.
4. The production method according to claim 1, wherein: and hot rolling the cast strip into a hot rolled strip steel with the thickness of 0.7-2.0 mm.
5. The production method according to claim 4, wherein: the hot rolling speed is less than or equal to 110 m/min.
6. The production method according to claim 1, wherein: the hot rolling finish rolling temperature is 1050-1200 ℃.
7. The production method according to claim 1, wherein: the hot-rolled strip steel is rolled into a checkered plate with the surface in a shape of hyacinth bean, rhombus, round bean or oblate mixed shape by a checkered rolling mill.
8. The production method according to claim 1, wherein: the coiling temperature of the hot-rolled checkered plate is 250-500 ℃.
9. A thin specification checkered plate is characterized in that: the thin gauge checkerboard is produced using the production method as claimed in any one of claims 1 to 8.
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| CN201810347775.4A CN109332417B (en) | 2018-04-18 | 2018-04-18 | Thin-specification checkered plate and production method thereof |
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| CN201810347775.4A CN109332417B (en) | 2018-04-18 | 2018-04-18 | Thin-specification checkered plate and production method thereof |
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| CN109332417A CN109332417A (en) | 2019-02-15 |
| CN109332417B true CN109332417B (en) | 2020-10-30 |
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| CN109731914B (en) * | 2019-02-21 | 2020-07-24 | 江苏沙钢集团有限公司 | Rolling method for improving surface quality of double-roller continuous casting rolled strip |
| CN110358976A (en) * | 2019-08-22 | 2019-10-22 | 江苏沙钢集团有限公司 | A kind of high-carbon steel strip and its production method |
| CN112517863A (en) * | 2019-09-19 | 2021-03-19 | 宝山钢铁股份有限公司 | High-strength thin-specification patterned steel plate/belt and manufacturing method thereof |
| CN111545570A (en) * | 2020-06-01 | 2020-08-18 | 攀钢集团西昌钢钒有限公司 | Control method for preventing thin checkered plate from generating red rust |
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| JP3575212B2 (en) * | 1997-02-25 | 2004-10-13 | Ｊｆｅスチール株式会社 | Manufacturing method of tight-scale striped steel sheet |
| CN101121177A (en) * | 2007-09-12 | 2008-02-13 | 山西太钢不锈钢股份有限公司 | Figured plate rolling arrangement roller mode and its figured plate rolling method |
| CN101619417B (en) * | 2008-06-30 | 2011-07-13 | 上海梅山钢铁股份有限公司 | Economical weather-resistant checkered plate and production method thereof |
| CN102199720B (en) * | 2010-03-23 | 2013-02-06 | 宝山钢铁股份有限公司 | Low carbon steel sheet with yield strength over 400MPa and manufacturing method thereof |
| CN102787278B (en) * | 2012-08-31 | 2015-04-22 | 宝山钢铁股份有限公司 | Boron-containing weather-proof thin strip steel and manufacturing method thereof |
| CN102787280B (en) * | 2012-08-31 | 2014-12-24 | 宝山钢铁股份有限公司 | Boron-containing weather-proof thin strip steel and manufacturing method thereof |
| CN106077090B (en) * | 2016-06-06 | 2018-09-04 | 日照宝华新材料有限公司 | The method for producing Thin Specs checkered steel plate based on ESP bar strip continuous casting and rolling flow paths |
| CN107716552B (en) * | 2017-10-16 | 2019-06-28 | 武汉钢铁有限公司 | A method of it is produced with CSP process with a thickness of 1.4mm diamond plate |
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Effective date of registration: 20200319 Address after: Suzhou City, Jiangsu province 215625 Zhangjiagang City Jin Fengzhen road Yongxin Shagang Technology Building Applicant after: JIANGSU SHAGANG GROUP Co.,Ltd. Applicant after: INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, Co.,Ltd. Applicant after: ZHANGJIAGANG SINO-US ULTRA-THIN BELT TECHNOLOGY Co.,Ltd. Address before: 215625 Jiangsu city of Zhangjiagang Province Jin Fengzhen road Yongxin Shagang Technology Building Applicant before: JIANGSU SHAGANG GROUP Co.,Ltd. |
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