CN112872028A - Low-cost high-quality wire controlled cooling process method - Google Patents
Low-cost high-quality wire controlled cooling process method Download PDFInfo
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- CN112872028A CN112872028A CN202011591806.4A CN202011591806A CN112872028A CN 112872028 A CN112872028 A CN 112872028A CN 202011591806 A CN202011591806 A CN 202011591806A CN 112872028 A CN112872028 A CN 112872028A
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- cooling water
- cooling
- rolled piece
- sizing
- pressure
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Classifications
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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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- 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
- 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
Abstract
The invention relates to the technical field of steel rolling, in particular to a low-cost high-quality wire rod controlled cooling process method which is sequentially provided with a 1-6# roughing mill group, a 7-12# intermediate mill group, a 13-16# pre-finishing mill group, a 17-24# finishing mill group and a 1-2# reducing and sizing mill group and is characterized in that cooling water tanks are respectively arranged behind 8#, 10# and 24# rolling mills, a first group of cooling water tanks for sizing is arranged behind the 1# reducing and sizing mill group, and a second group of water tanks for penetrating for sizing is arranged behind the 2# reducing and sizing mill group. The process method provided by the invention has the advantages of low cost and strong operability, and can ensure the performance of the steel bar.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a low-cost high-quality wire rod controlled cooling process method.
Background
Manganese is a common element in structural steels. The manganese in the carbon steel is mostly an element added into molten steel as a deoxidizer during steel making, and the content of the manganese is usually 0.3-0.8%; in the low alloy steel, manganese is specially added as an alloy element, and a proper amount of manganese can obviously improve the cold brittleness of steel, improve the yield strength and the tensile strength of the steel and not reduce the plasticity and the impact toughness too much; manganese plays a role in removing the content of harmful element oxygen in steel; manganese can also be combined with sulfur in steel to form manganese sulfide with high melting point at high temperature, so that the harmful effect of sulfur can be reduced, and the phenomenon of thermal brittleness caused by sulfur cracks during steel hot working is reduced. However, an excessive manganese content embrittles the steel and reduces its plasticity.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a low-cost high-quality wire rod cooling control process method which is low in cost, strong in operability and capable of ensuring the performance of a reinforcing steel bar.
The invention is realized by the following technical scheme:
a low-cost high-quality wire rod controlled cooling process method, it has 1-6# rough rolling unit, 7-12# middle rolling unit, 13-16# pre-finishing rolling unit, 17-24# finishing rolling unit and 1-2# reducing sizing mill set sequentially, characterized by that, set up the cooling water tank separately behind 8#, 10#, 24# rolling mill, set up the first group of cooling water tanks of sizing behind 1# reducing sizing mill set, set up the second group of water tanks of sizing behind 2# reducing sizing mill set;
and (3) controlling a cooling water tank after the 8# rolling mill: length of the water tank: 1m, cooling water amount: 35t/h, back flushing water amount: 25t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, rolled piece temperature reduction: and (3) cooling the rolled piece at 15-25 ℃ in specification: phi 51mm, rolled piece speed: 1.8-2.5 m/s;
and (3) controlling a cooling water tank after the 10# rolling mill: length of the water tank: 1m, cooling water amount: 35t/h, back flushing water amount: 25t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, rolled piece temperature reduction: and (3) cooling the rolled piece at 15-25 ℃ in specification: phi 37.5mm, rolled piece speed: 3.0-4.2 m/s;
and (3) controlling a cooling water tank after the 24# rolling mill: length of the water tank: -3 m, amount of cooling water: 70t/h, back flushing water amount: 50t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, rolled piece temperature drop: cooling the rolled piece at 50-70 ℃ in specification: phi 8-phi 12;
and (3) sizing the first group of cooling water tanks: length of the water tank: 3.5m, cooling water amount: 70t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water amount: 50/h, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, compressed air consumption: 400m3/h, rolled piece temperature reduction: 50-75 ℃;
sizing a second group of water penetrating boxes: length of the water tank: 3.5m, cooling water amount: 70t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water amount: 50/h, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, compressed air consumption: 400m3/h, rolled piece temperature reduction: 50-75 ℃.
Further, the temperature of the laying head is controlled at 760-780 ℃.
Advantageous effects of the invention
The low-cost high-quality wire rod controlled cooling process method protected by the invention has the following advantages:
under the condition that the initial rolling temperature is consistent with the temperature of the hot rolling process, the rolling and cooling control process is implemented in each interval, and the temperature of a rolled piece laying head is about 760-:
(1) the performance of the steel bar is guaranteed. The mechanical property and the process property of the steel bar produced by the controlled rolling and controlled cooling process are equivalent to those of the steel bar produced by the hot rolling process, the mechanical property of the steel bar produced by the controlled rolling and controlled cooling process is basically consistent after half-month aging, tempered martensite is not generated, and the corrosion resistance of the steel bar is basically consistent with that of pure hot rolling.
(2) On the premise of ensuring that the weight deviation is in the positive and poor production, the manganese content is reduced by 0.2 percent on the existing basis.
(3) The equipment model selection and the original system have good combination degree and strong system operability.
Detailed Description
A low-cost high-quality wire rod controlled cooling process method, it has 1-6# rough rolling unit, 7-12# middle rolling unit, 13-16# pre-finishing rolling unit, 17-24# finishing rolling unit and 1-2# reducing sizing mill set sequentially, characterized by that, set up the cooling water tank separately behind 8#, 10#, 24# rolling mill, set up the first group of cooling water tanks of sizing behind 1# reducing sizing mill set, set up the second group of water tanks of sizing behind 2# reducing sizing mill set;
and (3) controlling a cooling water tank after the 8# rolling mill: length of the water tank: 1m, cooling water amount: 35t/h, back flushing water amount: 25t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, rolled piece temperature reduction: and (3) cooling the rolled piece at 15-25 ℃ in specification: phi 51mm, rolled piece speed: 1.8-2.5 m/s;
and (3) controlling a cooling water tank after the 10# rolling mill: length of the water tank: 1m, cooling water amount: 35t/h, back flushing water amount: 25t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, rolled piece temperature reduction: and (3) cooling the rolled piece at 15-25 ℃ in specification: phi 37.5mm, rolled piece speed: 3.0-4.2 m/s;
and (3) controlling a cooling water tank after the 24# rolling mill: length of the water tank: -3 m, amount of cooling water: 70t/h, back flushing water amount: 50t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, rolled piece temperature drop: cooling the rolled piece at 50-70 ℃ in specification: phi 8-phi 12;
and (3) sizing the first group of cooling water tanks: length of the water tank: 3.5m, cooling water amount: 70t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water amount: 50/h, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, compressed air consumption: 400m3/h, rolled piece temperature reduction: 50-75 ℃;
sizing a second group of water penetrating boxes: length of the water tank: 3.5m, cooling water amount: 70t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water amount: 50/h, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, compressed air consumption: 400m3/h, rolled piece temperature reduction: 50-75 ℃.
Further, the temperature of the laying head is controlled at 760-780 ℃.
The wire rolled by the process method does not need to be added with alloy, and the alloy cost can be saved by 15 yuan per ton of steel. And simultaneously, tempered martensite is not generated, the corrosion resistance of the tempered martensite is basically consistent with that of pure hot rolling, the technological property of the wire rod can be ensured, the aim of reducing the Mn content of the alloy can be achieved, and greater economic benefit is generated.
In conclusion, the low-cost high-quality wire rod cooling control process method protected by the invention has the advantages of low cost and strong operability, and can ensure the performance of the reinforcing steel bar.
Claims (2)
1. A low-cost high-quality wire rod controlled cooling process method, it has 1-6# rough rolling unit, 7-12# middle rolling unit, 13-16# pre-finishing rolling unit, 17-24# finishing rolling unit and 1-2# reducing sizing mill set sequentially, characterized by that, set up the cooling water tank separately behind 8#, 10#, 24# rolling mill, set up the first group of cooling water tanks of sizing behind 1# reducing sizing mill set, set up the second group of water tanks of sizing behind 2# reducing sizing mill set;
and (3) controlling a cooling water tank after the 8# rolling mill: length of the water tank: 1m, cooling water amount: 35t/h, back flushing water amount: 25t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, rolled piece temperature reduction: and (3) cooling the rolled piece at 15-25 ℃ in specification: phi 51mm, rolled piece speed: 1.8-2.5 m/s;
and (3) controlling a cooling water tank after the 10# rolling mill: length of the water tank: 1m, cooling water amount: 35t/h, back flushing water amount: 25t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, rolled piece temperature reduction: and (3) cooling the rolled piece at 15-25 ℃ in specification: phi 37.5mm, rolled piece speed: 3.0-4.2 m/s;
and (3) controlling a cooling water tank after the 24# rolling mill: length of the water tank: -3 m, amount of cooling water: 70t/h, back flushing water amount: 50t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, rolled piece temperature drop: cooling the rolled piece at 50-70 ℃ in specification: phi 8-phi 12;
and (3) sizing the first group of cooling water tanks: length of the water tank: 3.5m, cooling water amount: 70t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water amount: 50/h, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, compressed air consumption: 400m3/h, rolled piece temperature reduction: 50-75 ℃;
sizing a second group of water penetrating boxes: length of the water tank: 3.5m, cooling water amount: 70t/h, cooling water pressure: 0.6-0.8MPa, back-flushing water amount: 50/h, back-flushing water pressure: 1.0-1.2MPa, purge compressed air pressure: 0.4-0.6MPa, compressed air consumption: 400m3/h, rolled piece temperature reduction: 50-75 ℃.
2. The process of claim 1 wherein the temperature of the laying head is controlled at 760-780 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011591806.4A CN112872028A (en) | 2020-12-29 | 2020-12-29 | Low-cost high-quality wire controlled cooling process method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011591806.4A CN112872028A (en) | 2020-12-29 | 2020-12-29 | Low-cost high-quality wire controlled cooling process method |
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| CN112872028A true CN112872028A (en) | 2021-06-01 |
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| CN202011591806.4A Pending CN112872028A (en) | 2020-12-29 | 2020-12-29 | Low-cost high-quality wire controlled cooling process method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113492150A (en) * | 2021-06-24 | 2021-10-12 | 盐城市联鑫钢铁有限公司 | Wire CRCC (continuous cooling control) production process and production line thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001300628A (en) * | 2000-04-21 | 2001-10-30 | Nippon Steel Corp | Method for cooling joined steel sheet |
| CN106311777A (en) * | 2016-08-30 | 2017-01-11 | 江苏省沙钢钢铁研究院有限公司 | Graded cooling control system of rod finish rolling |
| CN207463833U (en) * | 2017-10-31 | 2018-06-08 | 中冶南方工程技术有限公司 | A kind of energy-efficient wire water-cooled system |
| CN110479776A (en) * | 2019-08-21 | 2019-11-22 | 中冶华天工程技术有限公司 | DEVICE FOR BAR AND WIRE HOT ROLLING rolls rear closed loop control cooling system and control method |
| CN110883105A (en) * | 2019-11-15 | 2020-03-17 | 中冶华天工程技术有限公司 | Method for adjusting parameters of controlled cooling optimizing water tank of hot-rolled deformed steel bar in real time after rolling |
| CN210788602U (en) * | 2019-09-03 | 2020-06-19 | 石横特钢集团有限公司 | Full-flow controlled rolling and controlled cooling production line for bar |
-
2020
- 2020-12-29 CN CN202011591806.4A patent/CN112872028A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001300628A (en) * | 2000-04-21 | 2001-10-30 | Nippon Steel Corp | Method for cooling joined steel sheet |
| CN106311777A (en) * | 2016-08-30 | 2017-01-11 | 江苏省沙钢钢铁研究院有限公司 | Graded cooling control system of rod finish rolling |
| CN207463833U (en) * | 2017-10-31 | 2018-06-08 | 中冶南方工程技术有限公司 | A kind of energy-efficient wire water-cooled system |
| CN110479776A (en) * | 2019-08-21 | 2019-11-22 | 中冶华天工程技术有限公司 | DEVICE FOR BAR AND WIRE HOT ROLLING rolls rear closed loop control cooling system and control method |
| CN210788602U (en) * | 2019-09-03 | 2020-06-19 | 石横特钢集团有限公司 | Full-flow controlled rolling and controlled cooling production line for bar |
| CN110883105A (en) * | 2019-11-15 | 2020-03-17 | 中冶华天工程技术有限公司 | Method for adjusting parameters of controlled cooling optimizing water tank of hot-rolled deformed steel bar in real time after rolling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113492150A (en) * | 2021-06-24 | 2021-10-12 | 盐城市联鑫钢铁有限公司 | Wire CRCC (continuous cooling control) production process and production line thereof |
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Application publication date: 20210601 |