CN106583463A - Method for reducing strip head upwarping of pickling tandem cold milled strip steel - Google Patents
Method for reducing strip head upwarping of pickling tandem cold milled strip steel Download PDFInfo
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- CN106583463A CN106583463A CN201611066838.6A CN201611066838A CN106583463A CN 106583463 A CN106583463 A CN 106583463A CN 201611066838 A CN201611066838 A CN 201611066838A CN 106583463 A CN106583463 A CN 106583463A
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- Prior art keywords
- frame
- roll
- upwarp
- lead
- taking
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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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
Abstract
The invention provides a method for reducing strip head upwarping of a pickling tandem cold milled strip steel. The strip steel is rolled by adopting a multi-rack continuous rolling unit. The method comprises the following steps: adjusting the temperature of emulsified liquid at a rack inlet to be 60 to 65DEG C; and adjusting the injection pressure of the emulsified liquid at a last-stage rack inlet to be 600 to 900KPa, and adjusting the injection pressure of the emulsified liquid at a preceding-stage rack inlet to be 700 to 900KPa. According to the method provided by the invention, the problem of uncoiling and upwarping of the strip steel is solved, and a profile value of the strip steel is controlled within 10 to 40IU range; and the shape quality of a product and the stability of the rolling process are improved.
Description
Technical field
The invention belongs to belt steel rolling Technology field, more particularly to a kind of reduce taking the lead for pickling Continuous Cold Rolled Strip
The method stuck up.
Background technology
Come rolled band steel it is the at present conventional cold rolling processing technique of iron and steel by pickling cold continuous rolling production line, typical pickling
Continuous cold rolling process is generally comprised：Uncoiling, welding, straightening, pickling, roll and batch, unit equipment used is generally included：Open
Volume machine, welding machine, entry loop, withdrawal straightening machine, descaling bath, outlet looping, tandem mill and coiling machine.
In the tandem mills operation of rolling, strip steel to take the lead to upwarp be common problem, such as acid rolls the high trade mark
During non-orientation silicon steel, high grade non-oriented silicon steel hot rolled coil yield strength reaches 400-550MPa, total reduction 80.7%-
86.5%, maximum rolling force is close 1600 tons, and Final Stand Rolling power reaches more than 1100 tons, and Strip Shape Control difficulty is very big, thus
Easily take the lead to upwarp in continuous annealing entrance uncoiling when acid is rolled, pinch roll position easily steel-fastening before welding, and cause central sections reduction of speed.
Therefore, strip steel such as upwarps at the stability that the adjustment of plate shape is directly influenced in the strip shape quality and the operation of rolling of product.
The content of the invention
For the problems referred to above, present invention is primarily targeted at provide it is a kind of reduce pickling Continuous Cold Rolled Strip take the lead upwarp
Method, solve the problems, such as that strip steel uncoiling is upwarped, the plate shape value of strip steel is controlled in the range of 10～40IU.
In order to achieve the above object, the present invention is adopted the following technical scheme that：It is a kind of to reduce taking the lead for pickling Continuous Cold Rolled Strip
The method for upwarping, the strip steel is rolled using Multi-stand continuous rolling mill group, and methods described comprises the steps：
The temperature of frame porch emulsion is adjusted to 60-65 DEG C；
The injection pressure of final stage frame porch emulsion is adjusted to 600-900KPa, the porch emulsifying of prime frame is adjusted
The injection pressure of liquid is to 700-900KPa.
Preferably, adjusting the temperature of frame porch emulsion as further includes：Adjust emulsion cleaning box
And the temperature of injection line.
As further, preferably, methods described also includes：
The working roll roll neck of the frame is adjusted to 390mm-410mm；
The roughness of the breast roller is adjusted to 0.3-0.5um.
As further, preferably, methods described also includes：Hot-rolling is carried out before the rolling, and hot-rolling volume number is 5-8 volume.
As further, preferably, methods described also includes：Adjust frame roll gap and adjust weld seam shear rate to 190-
220mpm。
Preferably the multi-frame is five frames as further, including first, second, third, fourth and the 5th machine
Frame.
As it is further preferably, adjust the entrance emulsion injection pressure of the 3rd frame and the 4th frame to 700-
900KPa, adjusts the entrance emulsion injection pressure of the 5th frame to 600-900KPa.
As it is further preferably, adjust the working roll roll neck of first frame, the second frame and the 3rd frame to
390mm-410mm, adjusts the working roll roll neck of the 4th frame and the 5th frame to 390mm-400mm.
Preferably the gloss level of roll 0.4-0.5um of the 4th frame is adjusted as further, adjust the 5th machine
The gloss level of roll 0.3-0.4um of frame.
As further, preferably, methods described also includes：Weld seam is reached after the 3rd frame, when the 4th frame
Roll-force is clicked on more than 1100 ton hours, manually more than 1300 tons, the 5th frame roll-force and opens the four, the 5th frame
Roll gap, reduces the roll-force of the 4th and the 5th frame, it is ensured that the 5th rack outlet plate shape is stablized, and stops after weld seam shearing
Only manual operation, raises speed immediately to 400-600mpm.
Used as further preferably, the plate shape value of the pickling Continuous Cold Rolled Strip is 10～40IU.
Used as further preferably, the strip steel is high grade non-oriented silicon steel.
The invention has the beneficial effects as follows：
(1) the present invention is ejected into the temperature of the emulsion with steel plate surface by the cold rolling lubricating system of control by regulation
Spend to lift plate face temperature, and adjust injection pressure and improve lubricant effect to increase the emulsion consumption for being ejected into plate face,
Thus reduce the degree of punching shear, while reduce strip steel take the lead upwarp problem.
(2) use requirement that the present invention passes through adjustment roll, the i.e. roll neck of adjustment work roller, roughness and before the rolling
Hot-rolling is carried out, roll-force is reduced.
(3) present invention is further adjusted to weld seam and shear rate, also reduces roll-force, the strip steel Jing after rolling
The plate shape value of two passages of its edge that plate profile instrument shows can control in the range of 10～40IU, to improve board surface quality.
Description of the drawings
Fig. 1 is the schematic flow sheet of the method for taking the lead to upwarp that the embodiment of the present invention reduces pickling Continuous Cold Rolled Strip.
Fig. 2 is to be reduced after the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip using the embodiment of the present invention 1, the plate shape of strip steel
Value schematic diagram.
Fig. 3 is to be reduced after the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip using the embodiment of the present invention 5, the plate shape of strip steel
Value schematic diagram.
Specific embodiment
The present invention is solved in strip steel uncoiling by providing a kind of method for taking the lead to upwarp for reducing pickling Continuous Cold Rolled Strip
The problem stuck up, the plate shape value of strip steel is controlled in the range of 10～40IU；So as to avoid the continuous annealing central authorities that entrance steel-fastening is caused
Section reduction of speed, improves the stability that rolled band steel annealing is rolled in acid.
In order to solve drawbacks described above, the main thought of the embodiment of the present invention is：
As shown in figure 1, the embodiment of the present invention reduces the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip, the strip steel is adopted
Multi-stand continuous rolling mill group is rolled, and methods described comprises the steps：
Step S01:The temperature of frame porch emulsion is adjusted to 60-65 DEG C；
Step S02:The injection pressure of final stage frame porch emulsion is adjusted to 600-900KPa, prime frame is adjusted and is entered
The injection pressure of emulsion is to 700-900KPa at mouthful.
The technological process of typical pickling Continuous Cold Rolled Strip generally include uncoiling, welding, straightening, pickling, rolling, shearing and
Batch.Wherein, uncoiling, welding, straightening and pickling is the set-up procedure of tandem rolling, and rolling is the main course of processing, shears and rolls up
Take be the operation of rolling end.
Multi-stand continuous rolling mill group described in the embodiment of the present invention is usually five frames or four frame tandem rolling modes, in each machine
Frame is provided with the emulsion system of a set of cooling roll and lubrication strip steel, for controlling the plate shape of strip steel, while can be in final stage
Frame plate profile instrument disposed behind, for measuring the plate shape deviation of finished strip, mainly measures strip steel opening along cross-sectional direction
Stress distribution, through calculating of the mathematical model to stress distribution, passes through journey machine and processes, to working roll the controlled quentity controlled variable of result of calculation
The positive bending system of positive and negative bending system, intermediate calender rolls, intermediate calender rolls axial float system and emulsion system output control amount, improve into
The plate shape of product strip steel.The plate shape value of two passages of finished strip edge that the embodiment of the present invention is shown by plate profile instrument 10～
In the range of 40IU.
The embodiment of the present invention lifts plate face temperature to control by adjusting the temperature for being ejected into the emulsion with steel plate surface
Plate shape, adjusting emulsifying liquid temp can adopt various ways, for example, adjust emulsion cleaning box, the temperature of injection line；Originally simultaneously
Inventive embodiments can increase and be ejected into the emulsion consumption with steel plate surface to improve lubricity, for example, improve emulsion injection pressure
Power, the injection pressure of the emulsion of final stage frame is little than the injection pressure of prime frame, and final stage frame is usually the essence of strip steel
Roll.
Strip steel during continuous rolling, can reduce roll-force with panel in multi-frame by adjusting the use requirement of roll
Shape, such as roll neck of adjustment work roller, roughness and hot-rolling is carried out before the rolling, to reduce deformation extent.
Welding is to realize continuous rolling, i.e. welding machine by the head weldering of the afterbody of previous coil of strip and latter coil of strip
It is connected together.The embodiment of the present invention also can be adjusted to weld seam and shear rate, and to reduce roll-force, for example certain frame is rolled
When power processed is excessive, the roll gap of frame is opened.
In order to above and other purpose, feature and the advantage of the present invention can be become apparent, number cited below particularly is implemented
Example is illustrating the method for taking the lead to upwarp of reduction pickling Continuous Cold Rolled Strip of the present invention.
Embodiment 1
The high grade non-oriented silicon steel parameter that the embodiment of the present invention 1 is adopted is as follows：
The 35W300 trades mark, hot rolling raw thickness 2.6mm, chill volume thickness 0.35mm, acid is rolled carries out five frame tandem rollings, stagnation pressure
Lower rate=86.5%, strip width=1180mm.
The embodiment of the present invention 1 reduces the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip, and the strip steel is connected using five frames
Milling train group is rolled, and methods described comprises the steps：
Step S101:The temperature of frame porch emulsion is adjusted to 63 DEG C；
Step S102:The injection pressure of the three, the 4th frame porch emulsions is adjusted to 750KPa, the 5th frame is adjusted
The injection pressure of porch emulsion is to 650KPa.
As shown in Fig. 2 the plate shape value of the present embodiment 1 finished strip edge, two passages that plate profile instrument shows is in 10～40IU
In the range of.
Embodiment 2
The high grade non-oriented silicon steel parameter that the embodiment of the present invention 2 is adopted is as follows：
The 35W300 trades mark, hot rolling raw thickness 2.6mm, chill volume thickness 0.35mm, acid is rolled carries out five frame tandem rollings, stagnation pressure
Lower rate=86.5%, strip width=1180mm.
The embodiment of the present invention 2 reduces the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip, and the strip steel is connected using five frames
Milling train group is rolled, and methods described comprises the steps：
Step S201:The temperature of frame porch emulsion is adjusted to 60 DEG C；The regulation includes adjusting emulsion
The temperature of cleaning box and injection line；
Step S202:The injection pressure of the three, the 4th frame porch emulsions is adjusted to 700KPa, the 5th frame is adjusted
The injection pressure of porch emulsion is to 600KPa.
Step S203:Adjust first, second, third frame working roll roll neck be respectively 394.07mm, 403.14,
391.70mm, the working roll roll neck of the four, the 5th frames is in 389.82mm, 395.1mm；
Step S204:The gloss level of roll for adjusting the 4th frame is 0.45um, and the gloss level of roll of the 5th frame is
0.35um。
The plate shape value of the present embodiment 2 finished strip edge, two passages that plate profile instrument shows is in the range of 10～40IU.
Embodiment 3
The silicon steel parameter that the embodiment of the present invention 3 is adopted is as follows：
The 35W550 trades mark, hot rolling raw thickness 2.6mm, chill volume thickness 0.35mm, acid is rolled carries out five frame tandem rollings, stagnation pressure
Lower rate=86.5%, strip width=1200mm.
The embodiment of the present invention 3 reduces the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip, and the strip steel is connected using five frames
Milling train group is rolled, and methods described comprises the steps：
Step S301:The temperature of frame porch emulsion is adjusted to 65 DEG C；The regulation includes adjusting emulsion
The temperature of cleaning box and injection line；
Step S302:The injection pressure of the three, the 4th frame porch emulsions is adjusted to 800KPa, the 5th frame is adjusted
The injection pressure of porch emulsion is to 700KPa.
Step S303:Adjust first, second, third frame working roll roll neck be respectively 398.07mm, 408.14,
395.70mm, the working roll roll neck of the four, the 5th frames is in 392.82mm, 398.1mm；
Step S304:The gloss level of roll for adjusting the 4th frame is 0.45um, and the gloss level of roll of the 5th frame is
0.30um。
Step S305:Hot-rolling, hot-rolling volume number=8 volume are carried out before high grade non-oriented silicon steel rolling.
The plate shape value of the present embodiment 3 finished strip edge, two passages that plate profile instrument shows is in the range of 10～30IU.
Embodiment 4
The silicon steel parameter that the embodiment of the present invention 4 is adopted is as follows：
The 35W440 trades mark, hot rolling raw thickness 2.3mm, chill volume thickness 0.35mm, acid is rolled carries out five frame tandem rollings, stagnation pressure
Lower rate=84.7%, strip width=1150mm.
The embodiment of the present invention 4 reduces the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip, and the strip steel is connected using five frames
Milling train group is rolled, and methods described comprises the steps：
Step S401:The temperature of frame porch emulsion is adjusted to 64 DEG C；The regulation includes adjusting emulsion
The temperature of cleaning box and injection line；
Step S402:The injection pressure of the three, the 4th frame porch emulsions is adjusted to 900KPa, the 5th frame is adjusted
The injection pressure of porch emulsion is to 800KPa.
Step S403:Adjust first, second, third frame working roll roll neck be respectively 400.02mm, 409.16,
396.80mm, the working roll roll neck of the four, the 5th frames is in 395.62mm, 400.60mm；
Step S404:The gloss level of roll for adjusting the 4th frame is 0.50um, and the gloss level of roll of the 5th frame is
0.35um。
Step S405:Hot-rolling, hot-rolling volume number=5 volume are carried out before high grade non-oriented silicon steel rolling.
Step S406:It is 200mpm to adjust weld seam shear rate.
The plate shape value of the present embodiment 4 finished strip edge, two passages that plate profile instrument shows is in the range of 10～30IU.
Embodiment 5
The high grade non-oriented silicon steel parameter that the embodiment of the present invention 5 is adopted is as follows：
The 35W300 trades mark, hot rolling raw thickness 2.6mm, chill volume thickness 0.35mm, acid is rolled carries out five frame tandem rollings, stagnation pressure
Lower rate=86.5%, strip width=1180mm.
The embodiment of the present invention 5 reduces the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip, and the strip steel is connected using five frames
Milling train group is rolled, and methods described comprises the steps：
Step S501:The temperature of frame porch emulsion is adjusted to 62 DEG C；The regulation includes adjusting emulsion
The temperature of cleaning box and injection line；
Step S502:The injection pressure of the three, the 4th frame porch emulsions is adjusted to 750KPa, the 5th frame is adjusted
The injection pressure of porch emulsion is to 650KPa.
Step S503:Adjust first, second, third frame working roll roll neck be respectively 394.07mm, 403.14,
391.70mm, the working roll roll neck of the four, the 5th frames is in 389.82mm, 395.1mm；
Step S504:The gloss level of roll for adjusting the 4th frame is 0.45um, and the gloss level of roll of the 5th frame is
0.35um。
Step S505:Hot-rolling, hot-rolling volume number=8 volume are carried out before high grade non-oriented silicon steel rolling.
Step S506:It is 190mpm to adjust weld seam shear rate.
Step S507:Weld seam is reached after the 3rd frame, when the 4th and the 5th frame roll-force is more than 1100t, manual point
The four, the 5th frame roll gap are opened in impact, reduce the 4th and the 5th frame roll-force, it is ensured that the 5th rack outlet plate shape is stablized, weldering
Stop manual operation after seam shearing, raise speed immediately to more than 400mpm.The roll-force of each frame see the table below 1：
Table 1
| Shelf number | 1# frames | 2# frames | 3# frames | 4# frames | 5# frames |
| Roll-force/ton | 1408.6 | 1403.5 | 1410.8 | 1295.1 | 1066.4 |
As shown in figure 3, the plate shape value of the present embodiment 5 finished strip edge, two passages that plate profile instrument shows is in 10-30IU
Left and right.
Embodiment 6
The silicon steel parameter that the embodiment of the present invention 6 is adopted is as follows：
The 35W440 trades mark, hot rolling raw thickness 2.6mm, chill volume thickness 0.35mm, acid is rolled carries out five frame tandem rollings, stagnation pressure
Lower rate=86.5%, strip width=1120mm.
The embodiment of the present invention 6 reduces the method for taking the lead to upwarp of pickling Continuous Cold Rolled Strip, and the strip steel is connected using four frames
Milling train group is rolled, and methods described comprises the steps：
Step S601:The temperature of frame porch emulsion is adjusted to 63 DEG C；The regulation includes adjusting emulsion
The temperature of cleaning box and injection line；
Step S602:The injection pressure of second, third frame porch emulsion is adjusted to 750KPa, the 4th frame is adjusted
The injection pressure of porch emulsion is to 650KPa.
Step S603:The working roll roll neck for adjusting first, second frame is respectively 399.16,392.62mm, and the three, the 4th
The working roll roll neck of frame is in 391.80mm, 398.5mm；
Step S604:The gloss level of roll for adjusting the 3rd frame is 0.48um, and the gloss level of roll of the 4th frame is
0.38um。
Step S605:Hot-rolling, hot-rolling volume number=6 volume are carried out before high grade non-oriented silicon steel rolling.
Step S606:It is 220mpm to adjust weld seam shear rate.
Step S607:Weld seam is reached after the second frame, when the third and fourth frame roll-force is more than 1100t, manual point
The three, the 4th frame roll gap are opened in impact, reduce the third and fourth frame roll-force, it is ensured that the 4th rack outlet plate shape is stablized, weldering
Stop manual operation after seam shearing, raise speed immediately to more than 400mpm.
The plate shape value of the present embodiment 6 finished strip edge, two passages that plate profile instrument shows is in the range of 10～40IU.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
(1) the present invention is ejected into the temperature of the emulsion with steel plate surface by the cold rolling lubricating system of control by regulation
Spend to lift plate face temperature, and adjust injection pressure and improve lubricant effect to increase the emulsion consumption for being ejected into plate face,
Thus reduce the degree of punching shear, while reduce strip steel take the lead upwarp problem.
(2) use requirement that the present invention passes through adjustment roll, the i.e. roll neck of adjustment work roller, roughness and before the rolling
Hot-rolling is carried out, roll-force is reduced.
(3) present invention is further adjusted to weld seam and shear rate, also reduces roll-force, the strip steel Jing after rolling
The plate shape value of two passages of its edge that plate profile instrument shows can control in the range of 10～40IU, to improve board surface quality.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.Obviously, those skilled in the art can be to the present invention
Carry out various changes with modification without departing from the spirit and scope of the present invention.So, if these modifications of the present invention and modification
Belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to exist comprising these changes and modification
It is interior.
Claims (10)
1. it is a kind of reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, the strip steel using Multi-stand continuous rolling mill group rolling,
It is characterized in that：Methods described comprises the steps：
The temperature of frame porch emulsion is adjusted to 60-65 DEG C；
The injection pressure of final stage frame porch emulsion is adjusted to 600-900KPa, prime frame porch emulsion is adjusted
Injection pressure is to 700-900KPa.
2. it is according to claim 1 reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, it is characterised in that：Adjust institute
Stating the temperature of frame porch emulsion includes：Adjust the temperature of emulsion cleaning box and injection line.
3. it is according to claim 1 reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, it is characterised in that：The side
Method also includes：
The working roll roll neck of the frame is adjusted to 390mm-410mm；
The roughness of the breast roller is adjusted to 0.3-0.5um.
4. it is according to claim 1 reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, it is characterised in that：The side
Method also includes：Hot-rolling is carried out before the rolling, and hot-rolling volume number is 5-8 volume.
5. it is according to claim 1 reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, it is characterised in that：The side
Method also includes：Adjust frame roll gap and adjust weld seam shear rate to 190-220mpm.
6. the method for taking the lead to upwarp of the reduction pickling Continuous Cold Rolled Strip according to any one of claim 1-5, its feature exists
In：The multi-frame is five frames, including first, second, third, fourth and the 5th frame.
7. it is according to claim 6 reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, it is characterised in that：Adjust institute
The entrance emulsion injection pressure of the 3rd frame and the 4th frame is stated to 700-900KPa, the entrance breast of the 5th frame is adjusted
Change liquid injection pressure to 600-900KPa.
8. it is according to claim 6 reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, it is characterised in that：Adjust institute
The working roll roll neck of the first frame, the second frame and the 3rd frame is stated to 390mm-410mm, the 4th frame and the 5th is adjusted
The working roll roll neck of frame is to 390mm-400mm.
9. it is according to claim 6 reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, it is characterised in that：Adjust institute
The gloss level of roll 0.4-0.5um of the 4th frame is stated, the gloss level of roll 0.3-0.4um of the 5th frame is adjusted.
10. it is according to claim 6 reduce pickling Continuous Cold Rolled Strip the method for taking the lead to upwarp, it is characterised in that：It is described
Method also includes：Weld seam to after the 3rd frame, when the 4th frame roll-force is rolled more than 1300 tons, the 5th frame
Power processed is clicked on more than 1100 ton hours, manually and opens the four, the 5th frame roll gap.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508624A (en) * | 2019-07-23 | 2019-11-29 | 北京首钢股份有限公司 | A kind of anti-strip steel head flies the controlling hot rolling method floatd |
| CN113500098A (en) * | 2021-08-20 | 2021-10-15 | 山西太钢不锈钢股份有限公司 | Method for eliminating rolling chromatic aberration of ultrapure ferrite stainless steel by five-rack six-roller continuous rolling mill |
| CN113787098A (en) * | 2021-07-20 | 2021-12-14 | 马鞍山钢铁股份有限公司 | Acid pickling cold rolling method for high-strength steel with tensile strength of 780MPa |
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