CN114345952A - Temperature and rolling control process for corrosion-resistant low-carbon steel - Google Patents
Temperature and rolling control process for corrosion-resistant low-carbon steel Download PDFInfo
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- CN114345952A CN114345952A CN202210005357.3A CN202210005357A CN114345952A CN 114345952 A CN114345952 A CN 114345952A CN 202210005357 A CN202210005357 A CN 202210005357A CN 114345952 A CN114345952 A CN 114345952A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 415
- 229910001209 Low-carbon steel Inorganic materials 0.000 title claims abstract description 220
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- 238000005260 corrosion Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 15
- 230000008569 process Effects 0.000 title claims description 11
- 230000000007 visual effect Effects 0.000 claims description 49
- 238000001514 detection method Methods 0.000 claims description 32
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 239000011574 phosphorus Substances 0.000 claims description 12
- 101100356682 Caenorhabditis elegans rho-1 gene Proteins 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 abstract description 25
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- B21B37/58—Roll-force control; Roll-gap control
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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
- B21B37/46—Roll speed or drive motor control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
Abstract
The invention relates to a corrosion-resistant low-carbon steel temperature control rolling process, wherein when a roughing device is controlled by a control panel to carry out roughing rolling on a dephosphorized low-carbon steel plate, the control panel controls a roughing temperature detector to detect the actual temperature of the low-carbon steel plate and adjusts the temperature of the low-carbon steel plate to a corresponding value according to the comparison between the actual temperature of the low-carbon steel plate and the preset temperature; when the roughing device carries out formal roughing on the dephosphorized low-carbon steel plate, the control panel adjusts the power of each roughing roller group in the roughing device to a corresponding value according to the thickness of the low-carbon steel plate; the condition that the low-carbon steel plate cannot be rolled due to the fact that the temperature does not meet the standard in the rough rolling process can be effectively avoided, and the preparation efficiency of the low-carbon steel is further improved.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a temperature and rolling control process for corrosion-resistant low-carbon steel.
Background
Rolling is a metal working process, and refers to a press working method in which a metal billet is passed through a gap between a pair of rotating rolls, and the material is compressed by the rolls to reduce the cross section and increase the length.
At present, the international rolling technology which is relatively universal comprises a continuous rolling technology and a controlled rolling technology, wherein the continuous rolling technology enables a low-carbon steel plate to be continuously and uninterruptedly rolled from the previous procedure to the next procedure to reach the target thickness at one time, so that the method has the characteristics of high efficiency, low energy consumption, convenient control and the like; but the continuous rolling process has the defects of difficult control of intermediate programs, lower flexibility, difficult realization of the control of microstructures and the like.
However, in the low-carbon steel rolling process in the prior art, the power of the rollers in each roller set cannot be flexibly adjusted, so that when a single set of rollers fails, the subsequent roller sets cannot effectively roll the low-carbon steel plate, and the deviation between the actual size and the preset size of the low-carbon steel after rough rolling is large.
Disclosure of Invention
Therefore, the invention provides a temperature and rolling control process for corrosion-resistant low-carbon steel, which is used for solving the problem of low preparation efficiency of the low-carbon steel caused by the fact that the plate shape and the surface quality of the low-carbon steel cannot be effectively monitored and treated in the rolling process in the prior art.
In order to achieve the aim, the invention provides a temperature and rolling control process for corrosion-resistant low-carbon steel, which comprises the following steps:
step S1, conveying the low-carbon steel plate to a heating device, heating the low-carbon steel plate to a preset temperature by the heating device according to the initial thickness of the low-carbon steel plate, conveying the low-carbon steel plate to a phosphorus removal device for preliminary phosphorus removal, and conveying the low-carbon steel plate to a rough rolling device after the phosphorus removal is finished;
step s2, when the roughing device performs roughing on the dephosphorized low-carbon steel plate, the control panel controls the roughing vision detector in the roughing device to detect the actual thickness of the low-carbon steel plate after passing through the single roughing roll group and whether to adjust the power of the subsequent roughing roll group according to the detection result, if so, the control panel adjusts the power of the subsequent roughing roll group according to the difference between the actual thickness and the preset thickness of the low-carbon steel plate, and after the adjustment is completed, the control panel controls the roughing vision detector to detect the adjusted actual thickness after passing through the single roughing roll group and determines whether to adjust the distance between the roughing roll groups or determine whether the roughing roll group has a fault according to the thickness;
step S3, when the control panel judges that rough rolling is finished, the control panel conveys the low-carbon steel plate to a rough rolling dephosphorization device, and the rough rolling dephosphorization device keeps the temperature and dephosphorizes the low-carbon steel plate and then conveys the low-carbon steel plate to a finish rolling device;
step S4, when the finish rolling device finishes the low-carbon steel plate, the control panel transports the low-carbon steel plate to the finish rolling device to start primary finish rolling, the control panel controls the finish rolling visual detector to detect the crack characteristics on the low-carbon steel plate after a single finish rolling roller group and adjusts the power of a subsequent finish rolling roller group to a corresponding value according to the crack characteristics, when the subsequent finish rolling roller group finishes with the adjusted power, the control panel judges whether the subsequent finish rolling roller group operates normally or not through the finish rolling visual detector to detect the roller rotation speed ratio, if the roller rotation speed ratio of the subsequent finish rolling roller group meets the standard, the control panel controls the pressure detector to detect the rolling pressure and compares the rolling pressure with the maximum pressure value to judge whether the subsequent finish rolling roller group fails or not;
further, in S2, when the rough rolling apparatus performs formal rough rolling on the dephosphorized mild steel plate, the control panel determines a preset thickness H0 of the mild steel plate after passing through the group by the initial power V of the rough rolling apparatus; when the low-carbon steel plate passes through the rough rolling device, the rough rolling visual detector in the rough rolling device is controlled by the control panel to detect the actual thickness H of the low-carbon steel plate after passing through the rough rolling roller group, and the actual thickness H is compared with H0, and whether the thickness of the low-carbon steel plate after rolling meets the standard is judged according to the comparison result;
and if H is more than H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate is too high and adjusts the power of the subsequent rough rolling roller group.
If H is H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate meets the standard;
and if H is less than H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate is too low and adjusts the power of the subsequent rough rolling roller set.
Further, in S2, when H > H0 and the control panel determines that the thickness of the rough-rolled low-carbon steel sheet is too high, the control panel calculates a thickness difference Δ H and adjusts the power V of the subsequent rough-rolling roll group according to Δ H, and sets Δ Ha to H-H0; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first roughing roll group power increase adjusting coefficient rho 1, a second roughing roll group power increase adjusting coefficient rho 2 and a third roughing roll group power increase adjusting coefficient rho 3; wherein, Delta H1 < [ delta ] H2, 0.3 < rho 1 < rho 2 < rho 3 < 0.7;
when the delta H is less than or equal to the delta H1, the control panel increases the adjusting coefficient beta 1 by using the power of the first rough rolling device to adjust the power V of the subsequent rough rolling device;
when the power of the second rough rolling device is more than delta H and less than or equal to delta H2, the control panel uses a power increase adjusting coefficient beta 2 of the second rough rolling device to adjust the power V of the subsequent rough rolling device;
when Δ H > [ Δ H2, the control panel adjusts the power V of the subsequent rough rolling device by using the power increase adjustment coefficient β 3 of the third rough rolling device;
when the control panel increases the subsequent roughing device power V by using the kth roughing roll device power increase adjustment coefficient ρ k, setting k to 1, 2, 3, and setting V 'to V × ρ k, where the adjusted subsequent roughing roll group power is denoted as V'.
Further, in step S2, when H < H0 and the control panel determines that the thickness of the rough rolling low-carbon steel sheet is too low, the control panel calculates a thickness difference Δ H and adjusts the power V of the subsequent rough rolling roll group according to Δ H, and sets Δ Ha to H0-H; the control panel is provided with a first thickness difference value delta H1, a first thickness difference value delta H2, a first roughing roll group power reduction regulating coefficient beta 1, a second roughing roll group power reduction regulating coefficient beta 2 and a third roughing roll group power reduction regulating coefficient beta 3; wherein, Delta H1 is less than Delta H2, beta 1 is more than 0.4 and more than beta 2 and more than beta 3 and more than 0.9;
when the delta H is less than or equal to the delta H1, the control panel reduces the power of the third rough rolling device by an adjusting coefficient beta 1 to adjust the power V of the subsequent rough rolling device;
when the power of the second rough rolling device is less than or equal to the power of the second rough rolling device and is less than or equal to the power of the second rough rolling device, the control panel reduces the adjusting coefficient beta 2 to adjust the power V of the subsequent rough rolling device;
when Δ H > [ Δ H2, the control panel adjusts the power V of the subsequent rough rolling device by using the power adjustment reduction coefficient β 3 of the first rough rolling device;
when the control panel reduces the subsequent roughing device power V by using the jth roughing roll device power reduction adjustment coefficient β j, setting j to 1, 2, 3, and setting V 'to V × β j, where the adjusted subsequent roughing roll group power is denoted as V'.
Further, in step S2, the control panel determines the preset thickness Hb of the low carbon steel plate after passing through the group through the rough rolling device power V; when the control panel controls the subsequent roughing roll groups to roll the low-carbon steel plate at increased power, the control panel controls the visual detection device to detect the thickness of the low-carbon steel plate and records the thickness as H ', and the control panel compares H' with H0 to judge whether to adjust the distance between the subsequent roughing roll groups;
if H' ═ Hb, the control panel judges that the distance between the subsequent rough rolling roller groups is not adjusted and controls the rough rolling visual detection device to detect in real time;
and if H '> Hb and H' < H, the control panel judges that the distance between the subsequent rough rolling roller groups needs to be adjusted.
Further, in step S2, when the control panel determines that the gap between the subsequent rough rolling roll sets needs to be adjusted, the control panel calculates a difference Δ H ' between H ' and H and adjusts the gap J between the subsequent rough rolling roll sets according to Δ H ', and sets Δ H ' ═ H-H '; the control panel is provided with a first difference value delta H '1, a second difference value delta H' 2, a first interval adjusting coefficient omega 1, a second interval adjusting coefficient omega 2 and a third interval adjusting coefficient omega 3, wherein delta H '1 is smaller than delta H' 2, and 0.4 is larger than omega 1 and larger than omega 2 and larger than omega 3 and smaller than 0.7;
when the distance between the two roll groups is less than or equal to the distance between the two roll groups, the control panel adjusts the distance J between the two roll groups by using a first distance adjusting coefficient omega 1;
when the distance between the two subsequent roughing roll groups is less than the distance between the two subsequent roughing roll groups, the control panel adjusts the distance J between the two subsequent roughing roll groups by using a second distance adjusting coefficient omega 2 when the distance between the two subsequent roughing roll groups is less than the distance between the two subsequent roughing roll groups;
when Δ H '>. Δ H' 2, said control panel uses a third pitch adjustment coefficient ω 3 to adjust the pitch J between subsequent said roughing roll sets;
when the central control module adjusts the distance J between the subsequent rough roll groups by using the h-th distance adjustment coefficient ω h, h is set to 1, 2, 3, the adjusted distance between the rough roll groups is set to J ', and J' is set to J × ω h.
Further, in step S2, the control panel is provided with a preset rolling thickness Hc according to the adjusted distance; when the control panel controls the subsequent rough rolling roller group to roll the low-carbon steel plate at the regulated distance J ', the control panel controls the rough rolling visual detector to detect the thickness H ' of the low-carbon steel plate after the single rough rolling roller group and compares the thickness H ' with the thickness Hc to judge whether the rough rolling roller group has faults or not;
if H ═ Hc, the control panel judges that the thickness of the low-carbon steel plate is qualified and controls the rough rolling visual detection device to detect in real time;
if H' is more than Hc, the control panel judges that the roughing roll group has a fault and stops to send an alarm.
Further, in step S4, the control panel is further provided with a single finish rolling crack characteristic L0; when the finish rolling device finishes the low-carbon steel plate, the control panel controls the finish rolling visual detector to detect the crack characteristic L of the low-carbon steel plate after the single finish rolling roller group and judges whether to adjust the power of the subsequent finish rolling roller group or not according to the comparison between the L and the L0; the control panel is provided with a first finish rolling crack characteristic length L1, a second finish rolling crack characteristic length L2, a third finish rolling crack characteristic length L3, a first subsequent finish rolling roller set power regulating coefficient gamma 1, a second subsequent finish rolling roller set power regulating coefficient gamma 2 and a third subsequent finish rolling roller set power regulating coefficient gamma 3; wherein, L1 is more than L2 and more than L3, and gamma 1 is more than 0.5 and more than gamma 2 and more than gamma 3 and less than 0.9;
when L is not more than L1, the control panel judges that the power of the subsequent finish rolling device is not adjusted;
when L is more than L1 and less than or equal to L2, the control panel adjusts the power K of the subsequent finish rolling device by using the power adjustment coefficient gamma 1 of the first subsequent finish rolling device;
when L is more than L2 and less than or equal to L3, the control panel adjusts the power K of the subsequent finish rolling device by using the power adjustment coefficient gamma 2 of the second subsequent finish rolling device;
when L is larger than L3, the control panel uses the power adjustment coefficient gamma 3 of the third subsequent finish rolling device to adjust the power K of the subsequent finish rolling device;
when the control panel uses the power adjusting coefficient gamma n of the nth subsequent finishing roller group to adjust the power K of the subsequent finishing roller group, setting n to be 1, 2 and 3, and recording the adjusted power K' of the subsequent finishing roller group as K multiplied by gamma n.
Further, in step S4, the control panel is provided with a preset roller rotation speed ratio Z0; when the control panel controls the subsequent finishing roller group to finish the roller with the adjusted power K', the control panel detects whether the actual rotating speed ratio Z of the roller group of the subsequent finishing device to Z0 is qualified or not through the finishing visual detector;
if Z is less than or equal to Z0, the control panel judges that the subsequent finishing roller group operates normally and detects rolling pressure;
and if Z is more than Z0, the control panel judges that the subsequent finishing roller group has faults and stops the mill and sends out a fault alarm prompt.
Further, in step S4, the control panel is provided with a maximum rolling pressure Ymax; when Z is Z0, the control panel judges that the subsequent finishing device roller set operates normally, the control panel controls the pressure detector to detect the actual rolling pressure Y of the finishing device roller set and judges whether the subsequent finishing roller set breaks down or not according to the comparison between Y and Y0;
if Y is less than or equal to Ymax, the control panel judges that the subsequent finishing roller group operates normally;
and if Y is larger than Ymax, the control panel judges that the subsequent finishing roller group has a fault and stops the rolling and sends out a fault alarm prompt.
Compared with the prior art, the invention has the advantages that the thickness of the low-carbon steel plate in the rough rolling process can be effectively ensured to reach a specified size by controlling the visual detection device for rough rolling to detect the thickness of the low-carbon steel plate and judging whether to adjust the rotating speed of the rough rolling roller device or the distance between the roller groups according to the detection result after the first rough rolling of the low-carbon steel plate is finished, meanwhile, when the first finish rolling of the low-carbon steel plate is finished, the control panel controls the visual detection device for finish rolling to detect the crack characteristics on the low-carbon steel plate and adjust the rotating speed of the finish rolling roller groups according to the detection result, after the adjustment is finished, the control panel controls the visual detection device for finish rolling to detect the rotating speed ratio of the roller groups and compares the actual rotating speed ratio with the preset rotating speed ratio to judge whether the adjusted power is qualified or whether the finish rolling roller device has a fault, and the condition that the low-carbon steel plate can not accord with the rolling standard due to mechanical fault can be effectively avoided, further reducing the preparation efficiency of the low-carbon steel plate and further improving the preparation efficiency of the low-carbon steel.
Furthermore, the control panel controls the rough rolling visual detector to detect the actual thickness of the low-carbon steel plate rolled by the single rough rolling roller group in the formal rough rolling process and judges whether to adjust the subsequent rough rolling device according to the actual thickness of the low-carbon steel plate, so that the condition that the low-carbon steel plate cannot reach the standard in the subsequent rolling process due to the fact that the actual thickness of the low-carbon steel plate does not meet the standard can be effectively avoided, and the preparation efficiency of the low-carbon steel is further improved.
Further, when the control panel judges that the thickness of the rough-rolled low-carbon steel plate does not meet the standard, the control panel calculates a thickness difference delta H through H and H0 and adjusts the power V of the subsequent rough rolling device according to the delta H; according to the invention, when the thickness of the rough-rolled low-carbon steel plate is judged to be unqualified by the control panel, the control panel calculates the thickness difference between the actual thickness and the preset thickness and adjusts the power of the rough rolling device according to the thickness difference, so that the power of the rough rolling device can be effectively ensured not to be deviated, the rolling efficiency of the low-carbon steel plate is further ensured, and the preparation efficiency of the low-carbon steel plate is further improved.
Further, when the control panel controls the subsequent roughing roll groups to roll the low carbon steel plate at increased power, the control panel controls the visual detection device to detect the thickness of the low carbon steel plate and records the thickness as H ', and the control panel compares H' with H0 to determine whether to adjust the distance between the subsequent roughing roll groups; according to the invention, when the control panel controls the subsequent rough rolling roll group to roll the low-carbon steel plate with increased power, the control panel controls the rough rolling visual detection low-carbon steel plate to adjust whether the power of the post rough rolling roll device is qualified or not, and meanwhile, when the control panel judges that the power of the post rough rolling roll group is unqualified, the control panel judges and adjusts the distance between the rough rolling roll groups, so that the condition that the power of the post rough rolling roll device cannot enable the thickness of the low-carbon steel plate to reach a preset standard brick can be effectively avoided, and meanwhile, the rough rolling visual detection low-carbon steel plate is controlled to adjust the thickness of the post rough rolling roll device for rolling, so that the adjustment accuracy can be effectively improved, and the low-carbon steel preparation efficiency is further improved.
Further, when the control panel judges that the distance between the subsequent rough rolling roll groups needs to be adjusted, the control panel calculates a difference value delta H ' between H ' and H and adjusts the distance J between the subsequent rough rolling roll groups according to the delta H '.
Further, when the control panel controls the subsequent rough rolling roller group to roll the low-carbon steel plate at the adjusted distance J ', the control panel controls the rough rolling visual detector to detect the thickness H ' of the low-carbon steel plate after the single rough rolling roller group and compares the thickness H ' with the thickness Hc to judge whether the rough rolling roller group has faults; according to the invention, the thickness of the low-carbon steel plate is rolled by the distance between the subsequent rough rolling roller groups after adjustment through the detection of the rough rolling visual detection device controlled by the control panel, the control panel compares the thickness with the preset thickness to judge whether the thickness of the low-carbon steel plate is qualified, so that the low-carbon steel preparation efficiency caused by unqualified thickness of the low-carbon steel plate after the adjustment is effectively avoided, meanwhile, the control panel indirectly judges whether the rough rolling roller groups have faults or not through comparing the thickness with the preset thickness, so that the low-carbon steel preparation efficiency caused by the faults of the rough rolling roller groups can be effectively avoided, and the low-carbon steel preparation efficiency is further improved.
Further, after the control panel conveys the low-carbon steel plate to a roll group of a finishing device and starts primary finishing, the control panel controls a finishing visual detector to detect the crack characteristic L of the low-carbon steel plate after a single finishing roll group and judges whether to adjust the power of a subsequent finishing device or not according to the comparison between the L and the L0; according to the invention, the finish rolling visual detector is controlled by the control panel to detect the crack characteristics of the low-carbon steel plate after a single finish rolling roller group, so that the condition that the low-carbon steel plate cannot reach the standard after being rolled due to the fact that the power of the finish rolling device does not meet the standard in the finish rolling process can be effectively ensured, and the preparation efficiency of the low-carbon steel is further improved.
Further, when the control panel controls the subsequent finish rolling device to finish rolling at the adjusted power K', the control panel detects the actual rotation speed ratio Z and Z0 of the roller through finish rolling visual detection to judge whether the finish rolling device normally operates; according to the invention, whether the finish rolling device breaks down or not is judged by detecting the rotating speed ratio of the rollers of the adjusted finish rolling device power and according to the rotating speed ratio, so that the condition that the low-carbon and low-carbon steel plate cannot be effectively rolled due to the failure of the finish rolling device can be effectively avoided, and the preparation efficiency of the low-carbon steel is further improved.
Further, when the control panel judges that the finish rolling device operates normally when Z is Z0, the control panel controls the pressure and detects the actual rolling pressure Y of the finish rolling device and judges whether the finish rolling device has faults or not according to the comparison between Y and Y0; the pressure is controlled through the control panel, the actual rolling pressure of the finish rolling device is detected, and whether the finish rolling device breaks down or not is judged according to the actual rolling pressure of the finish rolling device; the problem that the low-carbon and low-carbon steel plate cannot be effectively rolled due to the fact that the finish rolling device fails is effectively avoided, and the low-carbon steel preparation efficiency is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a temperature and rolling control process for corrosion-resistant low-carbon steel according to the invention;
FIG. 2 is a flow chart of the temperature and rolling control process of the corrosion-resistant low-carbon steel.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a temperature-controlled and rolling-controlled process for corrosion-resistant mild steel according to the present invention, which includes:
the heating device 1 is used for preheating a low-carbon steel plate to be rolled;
the other heating devices are connected to remove phosphorus from the preheated low-carbon steel plate;
the rough rolling device 3 is connected with the phosphorus removal device 1 and used for receiving the low-carbon steel plate which is output by the phosphorus removal device 2 and is subjected to dephosphorization and rough rolling, the rough rolling device 3 comprises a plurality of rough rolling roller groups 31, and a rough rolling visual detector 5 used for detecting the thickness of the rough-rolled low-carbon steel plate is arranged at the downstream of each rough rolling roller group 31; the rough rolling device 3 is also provided with a rough rolling heating device 3 for carrying out secondary heating on the continuous casting plate; a rough rolling temperature detector 6 is also arranged in the rough rolling device 3 and used for detecting the actual temperature of the low-carbon steel plate in the rough rolling device 3;
the rough rolling dephosphorization device 21 is connected with the rough rolling device 3 and is used for carrying out dephosphorization and heat preservation on the low-carbon steel plate output by the rough rolling device 3;
the finish rolling device 4 is connected with the rough rolling dephosphorization device 21 and is used for finish rolling the low-carbon steel plate output by the rough rolling dephosphorization device 21; the finish rolling device 4 comprises a plurality of finish rolling roller sets 41 with adjustable roller spacing, and a finish rolling visual detector 51 for detecting the shape and the surface of a finished intermediate billet is respectively arranged at the downstream of each finish rolling roller set 41; the finish rolling device 4 is also provided with a finish rolling temperature detector 61 for detecting the actual temperature of the low-carbon steel plate in the finish rolling device 4; the finish rolling device 4 is also provided with a pressure detector 7 for detecting the rolling pressure of the low-carbon steel plate;
and a control panel (not shown) respectively connected with the heating device 1, each of the rough roller sets 31, each of the rough rolling vision sensors 5, the rough rolling heating device 32, each of the finish roller sets 41, the pressure detector 7, each of the finish rolling vision detectors 51 and the finish rolling temperature detector 61, and used for detecting the size parameters of the low carbon steel plate in real time during the process of rolling the low carbon steel plate and adjusting the operation parameters of the corresponding parts when the parameters do not meet the standard.
Referring to fig. 2, a flow chart of the temperature-controlled rolling process of the corrosion-resistant mild steel according to the present invention includes:
step S1, conveying the low-carbon steel plate to a heating device 1, heating the low-carbon steel plate to a preset temperature by the heating device 1 according to the initial thickness of the low-carbon steel plate, conveying the low-carbon steel plate to a phosphorus removal device 2 for preliminary phosphorus removal, and conveying the low-carbon steel plate to a rough rolling device 3 after the phosphorus removal is finished;
step s2, when the rough rolling device 3 performs rough rolling on the phosphorus-removed low-carbon steel plate, the control panel controls the rough rolling visual detector 5 in the rough rolling device 3 to detect the actual thickness of the low-carbon steel plate after passing through the single rough rolling roll group 31 and to adjust the power of the subsequent rough rolling roll group 31 according to the detection result, if the power of the subsequent rough rolling roll group 31 is determined to be adjusted, the control panel adjusts the power of the subsequent rough rolling roll group 31 according to the difference between the actual thickness and the preset thickness of the low-carbon steel plate, and after the adjustment is completed, the control panel controls the rough rolling visual detector 5 to detect the actual thickness after being adjusted in the single rough rolling roll group 31 and to determine whether to adjust the distance between the rough rolling roll groups 31 or determine whether the rough rolling roll group 31 has a fault according to the thickness;
step S3, when the control panel judges that rough rolling is finished, the control panel conveys the low-carbon steel plate to a rough rolling dephosphorization device 212, and the rough rolling dephosphorization device 212 carries out heat preservation and dephosphorization on the low-carbon steel plate and then conveys the low-carbon steel plate to a finish rolling device 4;
step S4, when the finishing device 4 finishes the low-carbon steel plate, the control panel transports the low-carbon steel plate to the finishing device 4 to start the primary finishing, the control panel controls the finishing vision detector 51 to detect the crack characteristics of the low-carbon steel plate after the single finishing roller group 41 finishes, the power of the subsequent finishing roller group 41 is adjusted to a corresponding value according to the crack characteristics, when the subsequent finishing roller group 41 finishes with the adjusted power, the control panel detects the roller rotation speed ratio through the finishing vision detector 51 to judge whether the subsequent finishing roller group 41 operates normally, if the roller rotation speed ratio of the subsequent finishing roller group 41 meets the standard, the control panel controls the pressure detector 7 to detect the rolling pressure, and compares the rolling pressure with the maximum pressure value to judge whether the subsequent finishing roller group 41 fails.
The invention can effectively ensure that the thickness of the low-carbon steel plate in the rough rolling process reaches a specified size by controlling the visual detection device for the rough rolling to detect the thickness of the low-carbon steel plate and judging whether to adjust the rotating speed of a rough rolling roller device or the distance between roller groups according to the detection result after the first rough rolling of the low-carbon steel plate is finished, meanwhile, when the first finish rolling of the low-carbon steel plate is finished, the control panel controls the visual detection device for the finish rolling to detect the crack characteristics on the low-carbon steel plate and adjust the rotating speed of a finish rolling roller group according to the detection result, and after the adjustment is finished, the control panel controls the visual detection device for the finish rolling to detect the rotating speed ratio of the roller groups and compares the actual rotating speed ratio with the preset rotating speed ratio to judge whether the adjusted power is qualified or whether the finish rolling roller device has a fault, thereby effectively avoiding the condition that the rolling of the low-carbon steel plate can not meet the standard due to mechanical fault, further reducing the preparation efficiency of the low-carbon steel plate and further improving the preparation efficiency of the low-carbon steel.
Specifically, in S2, when the rough rolling device 3 performs formal rough rolling on the phosphorous-removed low-carbon steel plate, the control panel determines the preset thickness H0 of the low-carbon steel plate after passing through the group according to the initial power V of the rough rolling device 3; when the low-carbon steel plate passes through the rough rolling device 3, the rough rolling visual detector 5 in the control panel control rough rolling device 3 detects the actual thickness H of the low-carbon steel plate after passing through the rough rolling roller group 31, compares the actual thickness H with H0, and judges whether the thickness of the rolled low-carbon steel plate meets the standard or not according to the comparison result;
if H is more than H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate is too high and adjusts the power of the subsequent rough rolling roller group 31.
If H is H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate meets the standard;
and if H is less than H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate is too low and adjusts the power of the subsequent rough rolling roller group 31.
According to the invention, the control panel controls the rough rolling visual detector 5 to detect the actual thickness of the low-carbon steel plate rolled by a single rough rolling roller group in the formal rough rolling process and judge whether to adjust the subsequent rough rolling device 3 according to the actual thickness of the low-carbon steel plate, so that the condition that the low-carbon steel plate cannot reach the standard in the subsequent rolling process due to the fact that the actual thickness of the low-carbon steel plate does not meet the standard can be effectively avoided, and the preparation efficiency of the low-carbon steel is further improved.
Specifically, in S2, when H > H0 and the control panel determines that the thickness of the rough-rolled low-carbon steel sheet is too high, the control panel calculates a thickness difference Δ H and adjusts the power V of the subsequent rough-rolling roll group 31 according to Δ H, and sets Δ Ha to H-H0; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first roughing roll group 31 power increase adjusting coefficient rho 1, a second roughing roll group 31 power increase adjusting coefficient rho 2 and a third roughing roll group 31 power increase adjusting coefficient rho 3; wherein, Delta H1 < [ delta ] H2, 0.3 < rho 1 < rho 2 < rho 3 < 0.7;
when the delta H is less than or equal to the delta H1, the control panel uses the power increase adjusting coefficient beta 1 of the first rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when the power of the second rough rolling device 3 is more than delta H and less than or equal to delta H2, the control panel uses a power increase adjusting coefficient beta 2 of the second rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when Δ H > [ Δ H2, the control panel adjusts the power V of the subsequent rough rolling device 3 using the power increase adjustment coefficient β 3 of the third rough rolling device 3;
when the control panel increases the power V of the subsequent roughing device 3 by using the kth roughing roll device power increase adjustment coefficient ρ k, k is set to 1, 2, 3, the adjusted power of the subsequent roughing roll group 31 is set to V ', and V' is set to V × ρ k.
Specifically, in step S2, when H < H0 and the control panel determines that the thickness of the rough-rolled low-carbon steel sheet is too low, the control panel calculates a thickness difference Δ H and adjusts the power V of the subsequent rough-rolling roll group 31 according to Δ H, and sets Δ Ha to H0-H; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first roughing roll group 31 power reduction adjustment coefficient beta 1, a second roughing roll group 31 power reduction adjustment coefficient beta 2 and a third roughing roll group 31 power reduction adjustment coefficient beta 3; wherein, Delta H1 is less than Delta H2, beta 1 is more than 0.4 and more than beta 2 and more than beta 3 and more than 0.9;
when the power of the third rough rolling device 3 is less than or equal to the power of the delta H1, the control panel reduces the adjusting coefficient beta 1 by using the power of the third rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when the power of the second rough rolling device 3 is less than or equal to the power of the second rough rolling device 3 and is less than or equal to the power of the second rough rolling device 2, the control panel adjusts the power V of the subsequent rough rolling device 3 by using a power reduction adjusting coefficient beta 2;
when Δ H > [ Δ H2, the control panel adjusts the power V of the subsequent rough rolling device 3 using the power adjustment reduction coefficient β 3 of the first rough rolling device 3;
when the control panel lowers the power V of the subsequent roughing mill 3 by using the jth roughing roll device power lowering adjustment coefficient β j, j is set to 1, 2, 3, and the adjusted power of the subsequent roughing roll group 31 is set to V ', V' is set to V × β j.
When the thickness of the rough-rolled low-carbon steel plate is judged to be unqualified through the control panel, the control panel calculates the thickness difference between the actual thickness and the preset thickness and adjusts the power of the rough rolling device 3 according to the thickness difference, so that the deviation can be effectively avoided when the power of the rough rolling device 3 is adjusted, the rolling efficiency of the low-carbon steel plate is further ensured, and the preparation efficiency of the low-carbon steel plate is further improved.
Specifically, in step S2, the control panel determines the preset thickness Hb of the low carbon steel plate after passing through the group by the power V of the rough rolling device 3; when the control panel controls the subsequent rough rolling roll group 31 to roll the low carbon steel plate with increased power, the control panel controls the visual detection device to detect the thickness of the low carbon steel plate and records the thickness as H ', and the control panel compares H' with H0 to judge whether to adjust the distance between the subsequent rough rolling roll group 31;
if H' is Hb, the control panel judges that the distance between the subsequent rough rolling roller group 31 is not adjusted and controls the rough rolling visual detection device to detect in real time;
if H '> Hb and H' < H, the control panel determines that the distance between the subsequent roughing roller sets 31 needs to be adjusted.
According to the invention, when the control panel controls the subsequent rough rolling roller group 31 to roll the low-carbon steel plate at increased power, the control panel controls the rough rolling visual detection low-carbon steel plate to adjust whether the power of the post rough rolling roller device is qualified, and meanwhile, when the control panel determines that the power of the post rough rolling roller group 31 is unqualified, the control panel determines to adjust the distance between the rough rolling roller groups, so that the condition that the power of the post rough rolling roller device cannot be adjusted to enable the thickness of the low-carbon steel plate to reach the preset standard brick can be effectively avoided, and meanwhile, the thickness of the rough rolling visual detection low-carbon steel plate to roll at the adjusted power of the post rough rolling roller device is controlled, so that the adjustment accuracy can be effectively improved, and the low-carbon steel preparation efficiency is further improved.
Specifically, in step S2, when the control panel determines that the pitch between the subsequent rough roll group 31 needs to be adjusted, the control panel calculates a difference Δ H ' between H ' and Hb and adjusts the pitch J between the subsequent rough roll group 31 according to Δ H ', and sets Δ H ' ═ Hb-H '; the control panel is provided with a first difference value delta H '1, a second difference value delta H' 2, a first interval adjusting coefficient omega 1, a second interval adjusting coefficient omega 2 and a third interval adjusting coefficient omega 3, wherein delta H '1 is smaller than delta H' 2, and 0.4 is larger than omega 1 and larger than omega 2 and larger than omega 3 and smaller than 0.7;
when Δ H 'is ≦ Δ H' 1, the control panel adjusts the pitch J between subsequent said roughing roll sets 31 using a first pitch adjustment coefficient ω 1;
when the distance between the two subsequent roughing roll groups 31 is less than the distance between the two subsequent roughing roll groups 31 and less than the distance between the two subsequent roughing roll groups, wherein the distance between the two subsequent roughing roll groups is more than the distance between the two subsequent roughing roll groups 31;
when Δ H '>. Δ H' 2, said control panel uses a third pitch adjustment coefficient ω 3 to adjust the pitch J between subsequent said roughing roll sets 31;
when the central control module adjusts the distance J between the subsequent rough roll groups by using the h-th distance adjustment coefficient ω h, h is set to 1, 2, 3, the adjusted distance between the rough roll groups 31 is set to J ', and J' is set to J × ω h.
When the control judgment is made to adjust the distance between the subsequent rough rolling roll groups 31 of the group, the control panel can effectively ensure the accuracy of the rolling thickness of the low-carbon steel plate and further improve the preparation efficiency of the low-carbon steel by calculating the difference between the actual thickness after the power of the rough rolling roll device is adjusted and the preset thickness of the low-carbon steel plate and adjusting the distance between the subsequent rough rolling roll groups 31 according to the difference.
Specifically, in step S2, the control panel is provided with a preset rolling thickness Hc according to the adjusted pitch; when the control panel controls the subsequent rough rolling roller group 31 to roll the low-carbon steel plate at the adjusted distance J ', the control panel controls the rough rolling visual detector 5 to detect the thickness H ' of the low-carbon steel plate after the single rough rolling roller group and compares the thickness H ' with the thickness Hc to judge whether the rough rolling roller group 31 has a fault;
if H ═ Hc, the control panel judges that the thickness of the low-carbon steel plate is qualified and controls the rough rolling visual detection device to detect in real time;
if H' is greater than Hc, the control panel determines that the roughing roll set 31 is out of order and stops to give an alarm.
According to the invention, the thickness of the low-carbon steel plate is rolled by the distance between the subsequent rough rolling roller groups 31 after adjustment through the detection of the rough rolling visual detection device controlled by the control panel, the control panel compares the thickness with the preset thickness to judge whether the thickness of the low-carbon steel plate is qualified, so that the low-carbon steel preparation efficiency caused by the unqualified thickness of the low-carbon steel plate after the adjustment is effectively avoided, meanwhile, the control panel indirectly judges whether the rough rolling roller groups 31 have faults or not by comparing the thickness with the preset thickness, so that the low-carbon steel preparation efficiency caused by the faults of the rough rolling roller groups 31 can be effectively avoided, and the low-carbon steel preparation efficiency is further improved.
Specifically, in step S4, the control panel is further provided with a single finish rolling crack characteristic length L0; when the finish rolling device 4 finishes the low-carbon steel plate, the control panel controls the finish rolling visual detector 51 to detect the crack characteristics L of the low-carbon steel plate after the single finish rolling roller group 41 and judges whether to adjust the power of the subsequent finish rolling roller group 41 according to the comparison between L and L0; the control panel is provided with a first finish rolling crack characteristic length L1, a second finish rolling crack characteristic length L2, a third finish rolling crack characteristic length L3, a first subsequent finish rolling roller group 41 power regulating coefficient gamma 1, a second subsequent finish rolling roller group 41 power regulating coefficient gamma 2 and a third subsequent finish rolling roller group 41 power regulating coefficient gamma 3; wherein, L1 is more than L2 and more than L3, and gamma 1 is more than 0.5 and more than gamma 2 and more than gamma 3 and less than 0.9;
when L is less than or equal to L1, the control panel judges that the power of the subsequent finish rolling device 4 is not adjusted;
when L is more than L1 and less than or equal to L2, the control panel adjusts the power K of the subsequent finish rolling device 4 by using the power adjustment coefficient gamma 1 of the first subsequent finish rolling device;
when L is more than L2 and less than or equal to L3, the control panel adjusts the power K of the subsequent finish rolling device 4 by using the power adjustment coefficient gamma 2 of the second subsequent finish rolling device;
when L is larger than L3, the control panel uses the power adjustment coefficient gamma 3 of the third subsequent finish rolling device to adjust the power K of the subsequent finish rolling device 4;
when the control panel adjusts the power K of the subsequent finishing roll group 41 by using the power adjustment coefficient γ n of the nth subsequent finishing roll group 41, n is set to 1, 2, 3, and the adjusted power of the subsequent finishing roll group 41 is set to K' ═ K × γ n.
According to the invention, the control panel controls the finish rolling visual detector 51 to detect the crack characteristics of the low-carbon steel plate after the single finish rolling roller group 41 during finish rolling, so that the condition that the low-carbon steel plate cannot reach the standard after being rolled due to the fact that the power of the finish rolling device 4 does not meet the standard in the finish rolling process can be effectively ensured, and the preparation efficiency of the low-carbon steel is further improved.
Specifically, in step S4, the control panel sets a preset roll rotation speed ratio Z0 by the adjusted power K'; when the control panel controls the subsequent finishing roller group 41 to finish the roller with the adjusted power K', the control panel detects whether the actual rotation speed ratio Z and Z0 of the rollers of the subsequent finishing device 4 are qualified or not through the finishing visual detector 51;
if Z is not more than Z0, the control panel judges that the subsequent finishing roller group 41 operates normally and detects the rolling pressure;
if Z > Z0, the control panel determines that the subsequent finishing roll stack 41 has failed and issues a fault alert.
According to the invention, whether the finish rolling device 4 breaks down or not is judged by detecting the rotation speed ratio of the rollers of the adjusted finish rolling device 4 power and according to the rotation speed ratio, so that the condition that the low-carbon and low-carbon steel plate cannot be effectively rolled due to the failure of the finish rolling device 4 can be effectively avoided, and the preparation efficiency of the low-carbon steel plate is further improved.
Specifically, in step S4, the control panel is provided with a maximum rolling pressure Ymax; when the control panel judges that the subsequent finishing device 4 roller group operates normally, the control panel controls the pressure detector 7 to detect the actual rolling pressure Y of the finishing device 4 roller group and judges whether the subsequent finishing roller group 41 has a fault or not according to the comparison of Y and Y0;
if Y is less than or equal to Ymax, the control panel judges that the subsequent finishing roller group 41 operates normally;
and if Y is larger than Ymax, the control panel judges that the subsequent finishing roller group 41 has fault shutdown and gives a fault alarm prompt.
The pressure is controlled through a control panel, the actual rolling pressure of the finish rolling device 4 is detected, and whether the finish rolling device 4 breaks down or not is judged according to the actual rolling pressure of the finish rolling device 4; the condition that the low-carbon and low-carbon steel plate cannot be effectively rolled due to the fact that the finish rolling device 4 breaks down can be effectively avoided, and the low-carbon steel preparation efficiency is further improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The temperature and rolling control process for the corrosion-resistant low-carbon steel is characterized by comprising the following steps of:
step S1, conveying the low-carbon steel plate to a heating device, heating the low-carbon steel plate to a preset temperature by the heating device according to the initial thickness of the low-carbon steel plate, conveying the low-carbon steel plate to a phosphorus removal device for preliminary phosphorus removal, and conveying the low-carbon steel plate to a rough rolling device after the phosphorus removal is finished;
step s2, when the roughing device performs roughing on the dephosphorized low-carbon steel plate, the control panel controls the roughing vision detector in the roughing device to detect the actual thickness of the low-carbon steel plate after passing through the single roughing roll group and whether to adjust the power of the subsequent roughing roll group according to the detection result, if so, the control panel adjusts the power of the subsequent roughing roll group according to the difference between the actual thickness and the preset thickness of the low-carbon steel plate, and after the adjustment is completed, the control panel controls the roughing vision detector to detect the adjusted actual thickness after passing through the single roughing roll group and determines whether to adjust the distance between the roughing roll groups or determine whether the roughing roll group has a fault according to the thickness;
step S3, when the control panel judges that rough rolling is finished, the control panel conveys the low-carbon steel plate to a rough rolling dephosphorization device, and the rough rolling dephosphorization device keeps the temperature and dephosphorizes the low-carbon steel plate and then conveys the low-carbon steel plate to a finish rolling device;
and step S4, when the low-carbon steel plate is finish rolled by the finish rolling device, the low-carbon steel plate is conveyed to the finish rolling device by the control panel after primary finish rolling is started, the control panel controls the finish rolling visual detector to detect the crack characteristics on the low-carbon steel plate after a single finish rolling roller group and adjusts the power of a subsequent finish rolling roller group to a corresponding value according to the crack characteristics, when the subsequent finish rolling roller group is finish rolled by the adjusted power, the control panel judges whether the subsequent finish rolling roller group normally operates or not by detecting the roller rotation speed ratio through the finish rolling visual detector, and if the roller rotation speed ratio of the subsequent finish rolling roller group accords with the standard, the control panel controls the pressure detector to detect the rolling pressure and compares the rolling pressure with the maximum pressure value to judge whether the subsequent finish rolling roller group fails or not.
2. The controlled temperature and controlled rolling process of corrosion-resistant low carbon steel as claimed in claim 1, wherein in the S2, when the rough rolling apparatus performs formal rough rolling on the phosphorus-removed low carbon steel sheet, the control panel determines the preset thickness H0 of the group of low carbon steel sheets by the initial power V of the rough rolling apparatus; when the low-carbon steel plate passes through the rough rolling device, the rough rolling visual detector in the rough rolling device is controlled by the control panel to detect the actual thickness H of the low-carbon steel plate after passing through the rough rolling roller group, and the actual thickness H is compared with H0, and whether the thickness of the low-carbon steel plate after rolling meets the standard is judged according to the comparison result;
and if H is more than H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate is too high and adjusts the power of the subsequent rough rolling roller group.
If H is H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate meets the standard;
and if H is less than H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate is too low and adjusts the power of the subsequent rough rolling roller set.
3. The temperature-controlled rolling process of corrosion-resistant low-carbon steel as recited in claim 2, wherein in S2, when H > H0 and the control panel determines that the thickness of the rough-rolled low-carbon steel sheet is too high, the control panel calculates a thickness difference Δ H and adjusts the power V of the subsequent rough-rolled roll group according to Δ H, and sets Δ Ha to H-H0; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first roughing roll group power increase adjusting coefficient rho 1, a second roughing roll group power increase adjusting coefficient rho 2 and a third roughing roll group power increase adjusting coefficient rho 3; wherein, Delta H1 < [ delta ] H2, 0.3 < rho 1 < rho 2 < rho 3 < 0.7;
when the delta H is less than or equal to the delta H1, the control panel increases the adjusting coefficient beta 1 by using the power of the first rough rolling device to adjust the power V of the subsequent rough rolling device;
when the power of the second rough rolling device is more than delta H and less than or equal to delta H2, the control panel uses a power increase adjusting coefficient beta 2 of the second rough rolling device to adjust the power V of the subsequent rough rolling device;
when Δ H > [ Δ H2, the control panel adjusts the power V of the subsequent rough rolling device by using the power increase adjustment coefficient β 3 of the third rough rolling device;
when the control panel increases the subsequent roughing device power V by using the kth roughing roll device power increase adjustment coefficient ρ k, setting k to 1, 2, 3, and setting V 'to V × ρ k, where the adjusted subsequent roughing roll group power is denoted as V'.
4. The temperature-controlled rolling process of corrosion-resistant low-carbon steel as recited in claim 2, wherein in step S2, when H < H0 and the control panel determines that the thickness of the rough-rolled low-carbon steel sheet is too low, the control panel calculates a thickness difference Δ H and adjusts the power V of the subsequent rough-rolling roll set according to Δ H, and Δ Ha is set to H0-H; the control panel is provided with a first thickness difference value delta H1, a first thickness difference value delta H2, a first roughing roll group power reduction regulating coefficient beta 1, a second roughing roll group power reduction regulating coefficient beta 2 and a third roughing roll group power reduction regulating coefficient beta 3; wherein, Delta H1 is less than Delta H2, beta 1 is more than 0.4 and more than beta 2 and more than beta 3 and more than 0.9;
when the delta H is less than or equal to the delta H1, the control panel reduces the power of the third rough rolling device by an adjusting coefficient beta 1 to adjust the power V of the subsequent rough rolling device;
when the power of the second rough rolling device is less than or equal to the power of the second rough rolling device and is less than or equal to the power of the second rough rolling device, the control panel reduces the adjusting coefficient beta 2 to adjust the power V of the subsequent rough rolling device;
when Δ H > [ Δ H2, the control panel adjusts the power V of the subsequent rough rolling device by using the power adjustment reduction coefficient β 3 of the first rough rolling device;
when the control panel reduces the subsequent roughing device power V by using the jth roughing roll device power reduction adjustment coefficient β j, setting j to 1, 2, 3, and setting V 'to V × β j, where the adjusted subsequent roughing roll group power is denoted as V'.
5. The temperature-controlled rolling process of corrosion-resistant low-carbon steel according to claim 3, wherein in step S2, the control panel determines the preset thickness Hb of the low-carbon steel plate after passing through the group through the roughing device power V; when the control panel controls the subsequent roughing roll groups to roll the low-carbon steel plate at increased power, the control panel controls the visual detection device to detect the thickness of the low-carbon steel plate and records the thickness as H ', and the control panel compares H' with H0 to judge whether to adjust the distance between the subsequent roughing roll groups;
if H' ═ Hb, the control panel judges that the distance between the subsequent rough rolling roller groups is not adjusted and controls the rough rolling visual detection device to detect in real time;
and if H '> Hb and H' < H, the control panel judges that the distance between the subsequent rough rolling roller groups needs to be adjusted.
6. The controlled-temperature controlled-rolling process for corrosion-resistant low-carbon steel according to claim 1, wherein in step S2, when the control panel determines that the adjustment of the gap between the subsequent rough-rolling roll sets is required, the control panel calculates a difference Δ H ' between H ' and Hb and adjusts the gap J between the subsequent rough-rolling roll sets according to Δ H ', so as to set Δ H ' ═ Hb-H '; the control panel is provided with a first difference value delta H '1, a second difference value delta H' 2, a first interval adjusting coefficient omega 1, a second interval adjusting coefficient omega 2 and a third interval adjusting coefficient omega 3, wherein delta H '1 is smaller than delta H' 2, and 0.4 is larger than omega 1 and larger than omega 2 and larger than omega 3 and smaller than 0.7;
when the distance between the two roll groups is less than or equal to the distance between the two roll groups, the control panel adjusts the distance J between the two roll groups by using a first distance adjusting coefficient omega 1;
when the distance between the two subsequent roughing roll groups is less than the distance between the two subsequent roughing roll groups, the control panel adjusts the distance J between the two subsequent roughing roll groups by using a second distance adjusting coefficient omega 2 when the distance between the two subsequent roughing roll groups is less than the distance between the two subsequent roughing roll groups;
when Δ H '>. Δ H' 2, said control panel uses a third pitch adjustment coefficient ω 3 to adjust the pitch J between subsequent said roughing roll sets;
when the central control module adjusts the distance J between the subsequent rough roll groups by using the h-th distance adjustment coefficient ω h, h is set to 1, 2, 3, the adjusted distance between the rough roll groups is set to J ', and J' is set to J × ω h.
7. The temperature-controlled and temperature-controlled rolling process of corrosion-resistant low-carbon steel according to claim 6, wherein in step S2, the control panel is provided with a preset rolling thickness Hc according to the adjusted spacing; when the control panel controls the subsequent rough rolling roller groups to roll the low-carbon steel plate at the regulated distance J ', the control panel controls the rough rolling visual detector to detect the thickness H ' of the low-carbon steel plate after the single rough rolling roller group and compares the thickness H ' with the thickness Hc to judge whether the thickness of the low-carbon steel plate is qualified;
if H ═ Hc, the control panel judges that the thickness of the low-carbon steel plate is qualified and controls the rough rolling visual detection device to detect in real time;
if H' is more than Hc, the control panel judges that the roughing roll group has a fault and stops to send an alarm.
8. The temperature-controlled rolling process of corrosion-resistant low-carbon steel according to claim 1, wherein in step S4, the control panel is further provided with a single finish rolling crack characteristic length L0; when the finish rolling device finishes the low-carbon steel plate, the control panel controls the finish rolling visual detector to detect the crack characteristic L of the low-carbon steel plate after the single finish rolling roller group and judges whether to adjust the power of the subsequent finish rolling roller group or not according to the comparison between the L and the L0; the control panel is provided with a first finish rolling crack characteristic length L1, a second finish rolling crack characteristic length L2, a third finish rolling crack characteristic length L3, a first subsequent finish rolling roller set power regulating coefficient gamma 1, a second subsequent finish rolling roller set power regulating coefficient gamma 2 and a third subsequent finish rolling roller set power regulating coefficient gamma 3; wherein, L1 is more than L2 and more than L3, and gamma 1 is more than 0.5 and more than gamma 2 and more than gamma 3 and less than 0.9;
when L is not more than L1, the control panel judges that the power of the subsequent finish rolling device is not adjusted;
when L is more than L1 and less than or equal to L2, the control panel adjusts the power K of the subsequent finish rolling device by using the power adjustment coefficient gamma 1 of the first subsequent finish rolling device;
when L is more than L2 and less than or equal to L3, the control panel adjusts the power K of the subsequent finish rolling device by using the power adjustment coefficient gamma 2 of the second subsequent finish rolling device;
when L is larger than L3, the control panel uses the power adjustment coefficient gamma 3 of the third subsequent finish rolling device to adjust the power K of the subsequent finish rolling device;
when the control panel uses the power adjusting coefficient gamma n of the nth subsequent finishing roller group to adjust the power K of the subsequent finishing roller group, setting n to be 1, 2 and 3, and recording the adjusted power K' of the subsequent finishing roller group as K multiplied by gamma n.
9. The temperature-controlled rolling process of corrosion-resistant low-carbon steel according to claim 8, wherein in step S4, the control panel is provided with a preset roller rotation speed ratio Z0 through the adjusted power K'; when the control panel controls the subsequent finishing roller group to finish the rolling with the adjusted power K', the control panel detects whether the actual rotation speed ratio Z and Z0 of the rollers of the subsequent finishing device are qualified or not through the finishing visual detector;
if Z is less than or equal to Z0, the control panel judges that the subsequent finishing roller group operates normally and detects rolling pressure;
and if Z is more than Z0, the control panel judges that the subsequent finishing roller group has faults and stops the mill and sends out a fault alarm prompt.
10. The temperature-controlled rolling process of corrosion-resistant low-carbon steel according to claim 9, wherein in step S4, the control panel is provided with a maximum rolling pressure Ymax; when the control panel judges that the subsequent finishing device roller group operates normally, the control panel controls the pressure detector to detect the actual rolling pressure Y of the finishing device roller group and judges whether the subsequent finishing roller group breaks down or not according to the comparison between Y and Y0;
if Y is less than or equal to Ymax, the control panel judges that the subsequent finishing roller group operates normally;
and if Y is larger than Ymax, the control panel judges that the subsequent finishing roller group has a fault and stops the rolling and sends out a fault alarm prompt.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2173066A1 (en) * | 1995-04-18 | 1996-10-19 | Yoshikiyo Tamai | Hot-Rolling Method of Steel Piece Joint During Continuous Hot-Rolling |
| CN103510026A (en) * | 2012-06-21 | 2014-01-15 | 内蒙古包钢钢联股份有限公司 | Low carbon steel plate for pressure-bearing equipment and rolling technology thereof |
| CN204866860U (en) * | 2015-06-28 | 2015-12-16 | 象山普精金属制品厂 | Online phosphorus removal device of black strip finish rolling district's secondary |
| CN106734201A (en) * | 2016-12-27 | 2017-05-31 | 中冶南方工程技术有限公司 | A kind of method that application continuous casting and rolling technique of sheet bar produces Thin Specs low-alloy high-strength steel |
| CN112676341A (en) * | 2020-12-03 | 2021-04-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot rolling method of low-carbon steel |
-
2022
- 2022-01-05 CN CN202210005357.3A patent/CN114345952B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2173066A1 (en) * | 1995-04-18 | 1996-10-19 | Yoshikiyo Tamai | Hot-Rolling Method of Steel Piece Joint During Continuous Hot-Rolling |
| CN103510026A (en) * | 2012-06-21 | 2014-01-15 | 内蒙古包钢钢联股份有限公司 | Low carbon steel plate for pressure-bearing equipment and rolling technology thereof |
| CN204866860U (en) * | 2015-06-28 | 2015-12-16 | 象山普精金属制品厂 | Online phosphorus removal device of black strip finish rolling district's secondary |
| CN106734201A (en) * | 2016-12-27 | 2017-05-31 | 中冶南方工程技术有限公司 | A kind of method that application continuous casting and rolling technique of sheet bar produces Thin Specs low-alloy high-strength steel |
| CN112676341A (en) * | 2020-12-03 | 2021-04-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot rolling method of low-carbon steel |
Non-Patent Citations (1)
| Title |
|---|
| 魏兵;韩斌;杨奕;谭文;汪水泽;刘洋;: "低碳钢低温轧制工艺实验研究", 武汉科技大学学报, no. 04 * |
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