CN111195656B - Rolling lubrication process and emulsion suitable for simultaneous production of plain carbon steel and high-strength steel - Google Patents
Rolling lubrication process and emulsion suitable for simultaneous production of plain carbon steel and high-strength steel Download PDFInfo
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- CN111195656B CN111195656B CN201811374699.2A CN201811374699A CN111195656B CN 111195656 B CN111195656 B CN 111195656B CN 201811374699 A CN201811374699 A CN 201811374699A CN 111195656 B CN111195656 B CN 111195656B
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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
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
Abstract
The invention discloses a rolling lubrication process and emulsion suitable for simultaneous production of plain carbon steel and high-strength steel, which comprises the following steps: adding emulsion into oil tanks on all frames in a cold continuous rolling unit, adjusting the concentration of the emulsion on the last frame to be 0.5-1%, and adjusting the concentrations of the emulsion on the other frames to be 1.5-2.5%; spraying the emulsion in all the oil tanks through a spraying beam on the rack, and controlling the temperature of the emulsion to be 50-60 ℃; controlling the injection pressure of the emulsion injected by the injection beam corresponding to each frame in the cold continuous rolling unit to be 4-8 bar, wherein the injection flow of the emulsion on each frame is not less than 1500L/h; and controlling the iron powder content in the injection beam corresponding to each frame in the cold continuous rolling unit to be 80-150 ppm when the injection beam injects the emulsion. The invention can meet the production requirement of the cold continuous rolling mill for producing the ultrahigh-strength steel and can also meet the production of the common carbon steel under the same emulsion lubrication parameters.
Description
Technical Field
The invention relates to the technical field of cold rolling, in particular to a rolling lubricating process and emulsion suitable for simultaneous production of plain carbon steel and high-strength steel.
Background
With the development of steel technology, more and more steel metallurgy products develop towards high strengthening technology, the modern latest generation of high-strength steel products reach the strength of 1200-; therefore, in a cold continuous rolling mill train, production is generally performed with a high emulsion concentration (> 2.5%) in order to improve cold rolling lubricity and reduce rolling force at the time of production; similarly, when a cold tandem mill is used to produce carbon steel with ordinary strength, if a high-concentration emulsion of high-strength steel is used again, the problem of excessive lubrication and slippage can occur, so that the emulsion is adjusted to be a low-concentration (< 2%), and for a cold rolling mill, the concentration adjustment process usually takes 1-2 hours, the problem of unstable rolling can occur during the adjustment, and the frequent adjustment can cause the problem of excessive consumption of the emulsion. Therefore, in the process of producing high-strength steel and common steel by the cold continuous rolling mill, two emulsion boxes are arranged, one box is provided with high-concentration emulsion, the other box is provided with low-concentration emulsion, and the emulsions of different boxes are switched according to requirements during production. However, the method puts high requirements on an emulsion system, the system is complex in composition and large in investment, and the management and maintenance of the using process also face high requirements.
In view of the above problem, in the prior patent application, for example, the cold rolling single stand reversible rolling control device and method disclosed in patent application No. 201510323865.6, the technical feature is that the invention is to spray emulsion with different flow rates during the production process of the single stand, and then satisfy the lubrication requirement during the production process of plain carbon steel and high strength steel.
The patent application No. 201210002077.3 discloses a rolling process of high-strength cold-rolled strip steel, which provides a process suitable for a continuous rolling mill set to produce high-strength steel, wherein different tensions and pressing distributions are set in each rack, 3.0-3.5% of high-concentration emulsion is used in cooperation with the 1 st to 4 th racks to roll high-strength steel products, the technology is still a technology for producing high-strength steel based on a high-concentration lubrication technology, and the frequent switching process of the emulsion of plain carbon steel rolling under low concentration cannot be avoided.
The patent application No. 201510323969.7 discloses a lubrication control method for a single-stand reversible cold rolling mill set, which mainly provides that the roll gap lubrication state is judged according to the actual rolling force performance in the production process, and then the stirring in an emulsion box body is adjusted through the shutdown time of the head and the tail of each pass of single-stand rolling, so that the concentration of the emulsion sprayed to a rolling mill is different, and different lubrication requirements are met. Although the method can flexibly adjust the lubricating requirements of rolling high-strength steel and plain carbon steel, the method is only suitable for single-rack equipment and is difficult to apply to a unit which is continuously rolled at a high speed like a continuous rolling mill.
From the disclosures of the above patents, the lubrication problem of the tandem cold rolling mill of plain carbon steel and high strength steel is easily solved in the existing single-stand reversible cold rolling mill, and in the production of the tandem cold rolling mill set, the existing lubrication and rolling oil technology always faces the technical problem of pre-lubrication or over-lubrication because the rolling speed is much higher than that of the single stand during production, and various technical defects exist and are difficult to meet the production.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the rolling lubrication process and the emulsion suitable for simultaneously producing the plain carbon steel and the high-strength steel, which can meet the production requirement of a cold continuous rolling mill for producing the ultrahigh-strength steel, can meet the production of the plain carbon steel under the same emulsion lubrication parameters, and avoids various troubles and influences on the productivity caused by repeatedly changing the concentration of the emulsion.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the rolling lubrication process suitable for simultaneously producing plain carbon steel and high-strength steel comprises the following steps:
1) adding emulsion into oil tanks on all frames in a cold continuous rolling unit, adjusting the concentration of the emulsion on the last frame to be 0.5-1%, and adjusting the concentrations of the emulsion on the other frames to be 1.5-2.5%;
2) spraying the emulsion in all the oil tanks through a spraying beam on the rack, and controlling the temperature of the emulsion to be 50-60 ℃;
3) controlling the injection pressure of the emulsion injected by the injection beam corresponding to each frame in the cold continuous rolling unit to be 4-8 bar, wherein the injection flow of the emulsion on each frame is not less than 1500L/h;
4) and controlling the iron powder content in the injection beam corresponding to each frame in the cold continuous rolling unit to be between 80 and 150ppm when the injection beam injects the emulsion.
The emulsion contains rolling oil, and the kinematic viscosity of the rolling oil is 50-80 mm at 40 DEG C2Is between/s.
The saponification value in the rolling oil is more than 180mgKOH/g, and the acid value is more than 5 mgKOH/g.
The rolling oil four-ball friction test PBA value greater than 1400N, PDThe value is greater than 2300N.
The granularity of the emulsion is between 2-4 um.
In the step 2), the temperature of the emulsion is controlled to be 55-60 ℃.
The number of the racks is 5.
On the other hand, the emulsion is suitable for the rolling lubrication process for simultaneously producing plain carbon steel and high-strength steel.
In the technical scheme, the rolling lubricating process and the emulsion suitable for simultaneously producing the plain carbon steel and the high-strength steel can meet the lubricating requirement of the rolling process of the high-strength steel and the plain carbon steel by using the same emulsion parameter, avoid repeated concentration adjustment during rolling of the high-strength steel and the plain carbon steel, and have the advantages of simple production and stable and reliable rolling process. When the emulsion provided by the invention is used, the ultrahigh-strength steel and the plain carbon steel are produced by adopting the same lubricating process parameters without difference.
Drawings
FIG. 1 is a schematic on-site view of the rolling lubrication process of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 1, the rolling lubrication process for simultaneous production of plain carbon steel and high strength steel provided by the present invention includes:
1) adding emulsion into oil tanks on 5 stands in a cold continuous rolling unit, controlling the concentration of the sprayed emulsion to be between 1.5 and 2.5 percent on SP1 and SP4 of a spray beam corresponding to 1 to 4 th stands, and controlling the concentration of the sprayed emulsion to be between 0.5 and 1 percent on SP5 of the spray beam corresponding to the last stand;
2) controlling the temperature of the emulsion in all the spraying beams for spraying the emulsion to be between 50 and 60 ℃, and optimally controlling the temperature to be between 55 and 60 ℃;
3) controlling the injection pressure of the emulsion injected into the injection beams SP 1-SP 5 corresponding to the 1 st to 5 th frames of the cold continuous rolling mill unit to be 4-8 bar, and simultaneously ensuring that the injection flow of the emulsion on each frame is not less than 1500L/h;
4) and controlling the injection beams SP 1-SP 5 corresponding to the 1 st to 5 th frames in the cold continuous rolling mill set to inject emulsion, wherein the content of iron powder in the emulsion is 80-150 ppm.
Preferably, the emulsion contains rolling oil, and the rolling oil needs to satisfy the following performances:
at 40 ℃, the kinematic viscosity is 50-80 mm2Is between/s.
The saponification value in the rolling oil is more than 180 mgKOH/g.
The acid value of the rolling oil is more than 5 mgKOH/g.
The rolling oil four-ball friction test PBA value greater than 1400N, PDThe value is greater than 2300N.
Preferably, the granularity of the emulsion is between 2 and 4 um.
The invention also provides the emulsion of the rolling lubrication process suitable for the simultaneous production of the plain carbon steel and the high-strength steel, and when the emulsion is used, the ultra-high-strength steel and the plain carbon steel are produced by adopting the same lubrication process parameters without being distinguished and changed.
Example one
Performance of rolling oil:
the kinematic viscosity of the rolling oil at 40 ℃ is 57.8mm2/s；
The saponification value is 194 mgKOH/g;
the acid value is 8.7 mgKOH/g;
the emulsion particle size was 2.3 um;
rolling oil four-ball friction test PBA value of 1500N, PDThe value is 2450N.
The emulsion described above was used with the following emulsion parameters:
the concentration of the emulsion sprayed on the 1 st to the 4 th stands of the cold continuous rolling unit is 1.8 percent, and the concentration of the emulsion sprayed on the 5 th stand of the cold continuous rolling unit is 0.8 percent;
controlling the temperature of the emulsion at 55 ℃;
controlling the injection pressure of the emulsion of the 1 st frame to be 4.5bar and the injection flow to be 2100L/h;
controlling the injection pressure of the emulsion of the 2 nd frame to be 5.0bar and the injection flow to be 2250L/h;
controlling the injection pressure of the emulsion of the 3 rd frame to be 5.5bar and the injection flow to be 2330L/h;
controlling the injection pressure of the emulsion of the 4 th frame to be 5.5bar and the injection flow to be 2330L/h;
controlling the injection pressure of the emulsion of the 5 th frame to be 4.2bar and the injection flow to be 2000L/h;
the iron powder in the emulsion was controlled at 130 ppm.
Example two
Performance of rolling oil:
the kinematic viscosity of the rolling oil at 40 ℃ is 75.1mm2/s；
The saponification value is 185 mgKOH/g;
the acid value is 4.7 mgKOH/g;
the emulsion particle size was 3.8 um;
rolling oil four-ball friction test PBA value of 1650N, PDThe value is 2320N.
The emulsion described above was used with the following emulsion parameters:
the concentration of the emulsion sprayed on the 1 st to the 4 th stands of the cold continuous rolling mill set is 1.5 percent, and the concentration of the emulsion sprayed on the 5 th stand of the cold continuous rolling mill set is 0.5 percent;
controlling the temperature of the emulsion at 50 ℃;
controlling the injection pressure of the emulsion of the 1 st frame to be 5.0bar and the injection flow to be 2250L/h;
controlling the injection pressure of the emulsion of the No. 2 frame to be 6.0bar and the injection flow to be 2460L/h;
controlling the injection pressure of the emulsion of the 3 rd frame to be 5.0bar and the injection flow to be 2250L/h;
controlling the injection pressure of the emulsion of the 4 th frame to be 5.0bar and the injection flow to be 2250L/h;
controlling the injection pressure of the emulsion of the 5 th frame to be 4.5bar and the injection flow to be 2150L/h;
the iron powder in the emulsion was controlled at 90 ppm.
EXAMPLE III
Performance of rolling oil:
the kinematic viscosity of the rolling oil at 40 ℃ is 52.0mm2/s；
The saponification value is 202 mgKOH/g;
the acid value is 5.0 mgKOH/g;
the emulsion particle size was 3.3 um;
rolling oil four-ball friction test PBA value of 1580N, PDThe value was 2550N.
The emulsion described above was used with the following emulsion parameters:
the concentration of the emulsion sprayed on the 1 st to the 4 th stands of the cold continuous rolling unit is 2.5 percent, and the concentration of the emulsion sprayed on the 5 th stand of the cold continuous rolling unit is 0.85 percent;
controlling the temperature of the emulsion at 58 ℃;
controlling the injection pressure of the emulsion of the 1 st frame to be 5.5bar and the injection flow to be 2330L/h;
controlling the injection pressure of the emulsion of the 2 nd frame to be 6.5bar and the injection flow to be 2550L/h;
controlling the injection pressure of the emulsion of the 3 rd frame to be 6.0bar and the injection flow to be 2460L/h;
controlling the injection pressure of the emulsion of the 4 th frame to be 6.0bar and the injection flow to be 2460L/h;
controlling the injection pressure of the emulsion of the 5 th frame to be 5.0bar and the injection flow to be 2250L/h;
the iron powder in the emulsion was controlled at 85 ppm.
In conclusion, the rolling lubrication process and the emulsion have simple realization principles, only relevant adjustment is needed to be carried out on the rolling lubricant, and the used emulsion parameters can be directly realized on a rolling cold continuous rolling unit. Meanwhile, after the technology of the invention is used, corresponding field equipment and rolling regulations are not required to be changed, the simultaneous rolling of high-strength steel and plain carbon steel products on a cold continuous rolling mill set can be effectively realized without adjusting emulsion parameters, the operation and waiting time of workers during operation is reduced, and the technology has higher practical value.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (7)
1. A rolling lubrication process suitable for simultaneous production of plain carbon steel and high-strength steel is characterized by comprising the following steps of:
1) adding emulsion into oil tanks on all frames in a cold continuous rolling unit, adjusting the concentration of the emulsion on the last frame to be 0.5-1%, and adjusting the concentrations of the emulsion on the other frames to be 1.5-2.5%;
2) spraying the emulsion in all the oil tanks through a spraying beam on the rack, and controlling the temperature of the emulsion to be 50-60 ℃;
3) controlling the injection pressure of the emulsion injected by the injection beam corresponding to each frame in the cold continuous rolling unit to be 4-8 bar, wherein the injection flow of the emulsion on each frame is not less than 1500L/h and not more than 2550L/h;
4) controlling the iron powder content in the injection beam corresponding to each frame in the cold continuous rolling unit to be between 80 and 150ppm when the injection beam injects the emulsion,
the emulsion contains rolling oil, and the kinematic viscosity of the rolling oil is 50-80 mm at 40 DEG C2Is between/s.
2. The rolling lubrication process suitable for the simultaneous production of plain carbon steel and high strength steel as claimed in claim 1, wherein: the saponification value in the rolling oil is more than 180mgKOH/g, and the acid value is more than 5 mgKOH/g.
3. The rolling lubrication process suitable for the simultaneous production of plain carbon steel and high strength steel as claimed in claim 1, wherein: the rolling oil four-ball friction test PBA value greater than 1400N, PDThe value is greater than 2300N.
4. The rolling lubrication process suitable for the simultaneous production of plain carbon steel and high strength steel as claimed in claim 1, wherein: the granularity of the emulsion is between 2-4 um.
5. The rolling lubrication process suitable for the simultaneous production of plain carbon steel and high strength steel as claimed in claim 1, wherein: in the step 2), the temperature of the emulsion is controlled to be 55-60 ℃.
6. The rolling lubrication process suitable for the simultaneous production of plain carbon steel and high strength steel as claimed in claim 1, wherein: the number of the racks is 5.
7. The emulsion suitable for simultaneous production of plain carbon steel and high-strength steel is characterized by comprising the following steps of: the emulsion suitable for the rolling lubrication process for simultaneously producing plain carbon steel and high-strength steel as claimed in any one of claims 1 to 6.
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| CN201811374699.2A CN111195656B (en) | 2018-11-19 | 2018-11-19 | Rolling lubrication process and emulsion suitable for simultaneous production of plain carbon steel and high-strength steel |
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| CN111195656B true CN111195656B (en) | 2021-08-17 |
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| CN114086194A (en) * | 2021-11-18 | 2022-02-25 | 包头钢铁（集团）有限责任公司 | Method for improving surface cleanliness of steel strip under mixed production condition of silicon steel and carbon steel |
| CN115740049B (en) * | 2022-11-17 | 2023-09-15 | 首钢智新迁安电磁材料有限公司 | Silicon steel cold continuous rolling lubrication system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57181719A (en) * | 1981-04-30 | 1982-11-09 | Sumitomo Metal Ind Ltd | Manufacture for clean cold rolling steel plate |
| CN103191917A (en) * | 2012-01-05 | 2013-07-10 | 鞍钢股份有限公司 | Rolling technology of high-strength cold-rolled strip steel |
| CN203061581U (en) * | 2013-01-22 | 2013-07-17 | 宝山钢铁股份有限公司 | Lubricating oil supply system for cold tandem mill |
| CN103372567A (en) * | 2012-04-26 | 2013-10-30 | 宝山钢铁股份有限公司 | Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling |
| CN104511478A (en) * | 2013-09-29 | 2015-04-15 | 宝山钢铁股份有限公司 | Method for preventing aluminum killed steel cold rolling scratching defects |
| CN105855291A (en) * | 2016-05-25 | 2016-08-17 | 东北大学 | Method for controlling surface micro-pit defect of stainless steel sheet and strip during cold-tandem rolling process |
-
2018
- 2018-11-19 CN CN201811374699.2A patent/CN111195656B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57181719A (en) * | 1981-04-30 | 1982-11-09 | Sumitomo Metal Ind Ltd | Manufacture for clean cold rolling steel plate |
| CN103191917A (en) * | 2012-01-05 | 2013-07-10 | 鞍钢股份有限公司 | Rolling technology of high-strength cold-rolled strip steel |
| CN103372567A (en) * | 2012-04-26 | 2013-10-30 | 宝山钢铁股份有限公司 | Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling |
| CN203061581U (en) * | 2013-01-22 | 2013-07-17 | 宝山钢铁股份有限公司 | Lubricating oil supply system for cold tandem mill |
| CN104511478A (en) * | 2013-09-29 | 2015-04-15 | 宝山钢铁股份有限公司 | Method for preventing aluminum killed steel cold rolling scratching defects |
| CN105855291A (en) * | 2016-05-25 | 2016-08-17 | 东北大学 | Method for controlling surface micro-pit defect of stainless steel sheet and strip during cold-tandem rolling process |
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