22 results about "Steckel mill" patented technology

The invention discloses a thickness control method for a single-stand steckel mill, which belongs to the field of metallurgical automation control and comprises the following steps: acquiring the distance between the steckel mill and an inlet side thickness gauge, the distance between the steckel mill and an outlet side multifunctional instrument, the rigidity of the mill in forward rotation and the rigidity of the mill in reverse rotation; whether the thickness difference detected by instruments on the two sides of the steckel mill is used for feedforward control or feedback control is determined; according to the running speed of the strip steel under the feed-forward control detection instrument and the distance between the feed-forward control detection instrument and the steekle mill, the roll gap feed-forward adjustment amount is calculated; according to the running speed of the strip steel under the feedback control detection instrument and the distance between the feedback control detection instrument and the steckel mill, the roll gap feedback adjustment amount is calculated; and calculating the final execution adjustment amount of the steekle mill roll gap in combination with the roll gap feedforward adjustment amount and the roll gap feedback adjustment amount. The method solves the problem of thickness control in the reversible rolling process of the single-stand steckel mill, and has positive significance in improving the thickness control quality of the single-stand steckel mill.

The application discloses a production method of ferrite stainless steel for mine equipment, which comprises the following steps: S1, feeding ferrite stainless steel slab after continuous casting into a holding pit for heat preservation treatment, and performing hot dressing when the surface temperature of the ferrite stainless steel slab in the holding pit is reduced to 400-450 DEG C; S2, feeding the ferrite stainless steel slab after the hot dressing into a hot rolling heating furnace for heating, controlling the furnace temperature of the hot rolling heating furnace at 1180-1210 DEG C, and controlling the furnace time at 180-220 min; S3, coarsely rolling the ferrite stainless steel slab discharged from the furnace to 28-35 mm by a furnace and roll mill, and then finely rolling to 3.0-6 mm; S4, coiling the rolled material by a coiling machine, and controlling the final coiling temperature at 650-700 DEG C; S5, performing full-hydrogen bell furnace annealing treatment on the hot-rolled black coil; S6, performing homogenizing heat treatment on the steel coil after the annealing treatment; and S7, shearing and packaging.

The invention relates to a NiCrNbN austenite heat-resistant cast steel material and a preparation method thereof, and belongs to the technical field of casting materials. The technical problem to be solved by the invention is to provide the NiCrNbN austenite heat-resistant cast steel material with a high strength grade in a high-temperature environment. The material is composed of the following components in percentage by weight: 0.07-0.09% of C; 0.60% to 0.80% of Si; 0.40% to 0.60% of Mn; cr: 19.00% to 22.00%; ni: 24.00% to 26.00%; 0.20% or less of Mo; 1.00% to 1.20% of Nb; 0.060% to 0.080% of N; less than or equal to 0.020% of P; less than or equal to 0.020% of S; and the balance of Fe and inevitable impurities. According to the NiCrNbN casting material, the specific chemical component proportion is adopted, the higher specific mechanical property can be guaranteed, the NiCrNbN casting material can be used under the high-temperature condition, and a new way is provided for design and material selection of steel castings of coiling drums of large steckel mills. The preparation method adopts a specific heat treatment process, the method is simple and easy to operate, and the obtained product is stable in mechanical property, reliable in quality and suitable for production of large steel castings for coiling drums of large steckel mills.

The invention discloses a method for producing a 12Cr1MoV heat-resistant structural steel strip by adopting a process of'thick slab continuous casting + steekle mill ', and belongs to the technical field of heat-resistant steel production. According to the method, in order to solve the technical problems that 12Cr1MoV peritectic steel is prone to bleed-out and poor in surface quality in the thin slab continuous casting process, stable and efficient production of the 12Cr1MoV heat-resistant structural steel strip is achieved by precisely controlling the thick slab continuous casting process, optimizing the chemical components of molten steel and designing the adaptive steekle mill rolling process and follow-up treatment. Continuous casting of the plate blank with the thickness of 220-240 mm is adopted in cooperation with low-pulling-speed covering slag special for peritectic steel, and the steel breakout risk is effectively reduced; the optimized component design and rolling process ensure the high-temperature strength and processability of the steel strip, and the product can meet the heat-resistant use requirements in the fields of steam turbines, boilers and the like; meanwhile, existing equipment is utilized, large-scale transformation is not needed, the production cost is low, industrial popularization is easy, and the blank of related production technologies is filled.

The invention discloses a nickel-copper alloy N04400 wide strip coil suitable for steckel mill production and a preparation method of the nickel-copper alloy N04400 wide strip coil. The preparation method comprises the following steps: preparing a plate blank and spraying an anti-oxidation material; the plate blank is preheated at the temperature of 650-720 DEG C and then heated to the temperature of 1130-1160 DEG C, and soaking and heat preservation are conducted; performing high-pressure water descaling; performing reciprocating rolling in a roughing mill to obtain an intermediate billet; the furnace temperature of a coiling furnace is controlled to be 940-985 DEG C in the process of rolling in a reciprocating mode, the finish rolling starting temperature is controlled to be 950-1000 DEG C, the finish rolling temperature is controlled to be larger than or equal to 850 DEG C, and a hot rolled steel strip is obtained; and finally coiling to obtain the hot-rolled black coil. By means of the optimized stepped heating and steckel rolling process, the problems that a traditional method is low in yield and low in efficiency are solved, the manufactured N04400 wide-width strip coil is uniform in structure and excellent in performance, the yield and production efficiency can be remarkably improved, and the production cost can be reduced.

The application discloses a kind of double-stand furnace roll mill control processes for reducing economic duplex stainless steel hot edge cracking, comprising: casting blank heating process control, the final heating temperature of casting blank is 1150-1260 DEG C, total residence time is 140-280 min;Control rough rolling process, using 5-7 pass rolling, in the first pass roughing scale removal is put, each pass reduction is 15-25%, rolling speed is 3-5 m / s, rough rolling outlet temperature is 1000-1100 DEG C;Control finish rolling process, using double-stand three rolling six pass rolling, in the first four passes, reduction is 25-35%, rolling speed is 6-9 m / s, in the last two passes, reduction is 10-15%, rolling speed is 2-3 mm, finish rolling outlet temperature is 900-1000 DEG C, coiling furnace heating temperature is 1000-1100 DEG C, coiling temperature is 500-700 DEG C.The application uses double-stand furnace roll mill control process, through casting blank heating process control, rough rolling process control, finish rolling process control, the width of economic duplex stainless steel hot edge cracking is reduced by more than 70% compared with prior art, effectively improve the product edge quality.

This invention discloses a method for manual intervention in online thickness anomalies of medium-thick plate hot rolling mills. The method includes: after the primary system of the hot rolling mill receives relevant parameters sent by the secondary system, the electric pressing system EGC's pressing screw (11), driven by the pressing motor (12), adjusts the roll gap of the upper and lower rolls (3) from large to small to the current rolling roll gap position; the hydraulic AGC cylinder (1) is raised, pushing the lower support roll (2) and the lower roll to the rolling line position; the roller table (4) transports the rolled piece (7) for reciprocating rolling in the hot rolling mill; the head of the finished product pass is measured and fed back by a thickness gauge (5); based on the feedback thickness, the operator manually intervenes in the thickness using the gap+ / gap- buttons in the lower left corner of the mill's main screen, combining real-time measurement feedback from the thickness gauge (5) for manual intervention optimization. The advantage of this invention is that it allows for quick and safe manual thickness intervention through newly added function buttons on the operating interface, improving product qualification rate.

The invention provides a vertical rolling mill roll system and a vertical rolling mill, and relates to the technical field of vertical rolling mills. The vertical rolling mill roll system comprises a lower transmission bearing box and a roll, the lower transmission bearing box comprises a power input horizontal shaft and a power output vertical shaft which are synchronously and rotationally connected, the roll is arranged at the end, away from the power input horizontal shaft, of the power output vertical shaft in a sleeving mode, and the power input horizontal shaft is used for being connected with a driving shaft. The rollers can be directly assembled on the lower transmission bearing box, the overall height of the rolling mill is directly reduced, due to the fact that the rollers are connected with the power output vertical shaft, a transmission chain is simplified, middle connecting parts are reduced, the maintenance complexity and cost are reduced, the replacement process of the roller system is more convenient, and the service life of the rolling mill is prolonged. And the purposes of being smaller in size, easy to maintain, economical and practical are achieved, and the device is particularly suitable for a wide and thick plate steckel mill production line with high requirements for the overall size and maintenance.

The invention discloses a processing technology of an S31254 super austenitic stainless steel coiled plate. The processing technology comprises the steps of primary heating and rolling, secondary heating, a descaling system, rough rolling, rolling of a steekle mill, laminar cooling and the like. By means of the measures of increasing the tapping temperature, conducting long-time heating cogging, conducting secondary heating, controlling the pass reduction rate, controlling the process temperature drop, shortening the rolling rhythm, conducting the low-temperature coiling technology and the like, products which are free of edge cracks and excellent in quality are produced, meanwhile, the rolling load needed in the S31254 hot rolling process is greatly reduced, and the stability of the S31254 hot rolling process is guaranteed.

The invention discloses a medium plate steckel mill working roll cooling water tank structure which comprises a machining box body, a transmission shaft is fixedly connected to the inner wall of the machining box body, a mill working roll is fixedly connected to the side wall of the transmission shaft, and a connecting transverse plate is fixedly connected to the inner wall of the machining box body. The invention relates to the technical field of working roll cooling structures. Through cooperation of the side water tanks, the large-diameter nozzles, the side water tank water inlet pipes, the side water tank main water inlet pipes, the middle water tanks, the small-diameter nozzles and the middle water tank water inlet pipes, the water spraying quantity of the water tanks can be effectively reduced, the nozzle utilization rate is improved, meanwhile, the cooling efficiency of equipment on the working roller of the rolling mill is practically guaranteed, and therefore equipment investment can be reduced; in addition, cooling water can be purified and filtered through cooperation of the cooling water storage tank and the multi-stage filter, cyclic utilization of the cooling water is achieved, and consumption of cooling liquid of the equipment is reduced.

The invention discloses a control method for thin-gauge energy-saving rolling of a steckel rolling line, and belongs to the technical field of metallurgical automation control. The method comprises the steps that an L1 system receives a roll gap set value and a speed set value of a finishing mill issued by an L2 system; when the roll gap set value is not smaller than the preset threshold value, the set value issued by the L2 system is executed; when the roll gap set value is smaller than the preset threshold value, the L1 system lifts the roll gap of the finishing mill and maintains the running of the finishing mill at the preset threshold value; the main transmission speed of the finishing mill is controlled to be smaller than the speed set value; when the steckel mill carries out rolling of the last Nth pass and is about to bite strip steel, the L1 system adjusts a roll gap of the finishing mill to a roll gap set value; and the speed of the finishing mill is increased to a speed set value. According to the method, by optimizing the roll gap and speed control in the no-load period, reactive power consumption is remarkably reduced, normal rolling is not affected, the energy-saving effect is remarkable, and implementation is easy.

The utility model relates to a strip steel head cooling device between steckel mill racks, which comprises a spraying device positioned between a flying shear and a dephosphorization device, the spraying device comprises spraying pipes positioned at the upper end and the lower end of strip steel, and the spraying pipes are provided with a plurality of nozzles which are arranged along the conveying direction of the strip steel and are used for spraying cooling water to the strip steel. The spraying pipe is arranged in front of the flying shear rear dephosphorization device, spraying cooling is only conducted on the head of strip steel from the upper direction and the lower direction through the spraying pipe, the head-tail temperature difference is reduced, secondary oxide skin pressing-in caused by the high temperature of the head of the steel strip and thickness fluctuation influenced by the large head-tail temperature difference are avoided, and therefore the production requirement is met; through the arrangement of a connector and a corrugated pipe, the distance between the two nozzles can be conveniently adjusted; the distance between every two adjacent sliding blocks is adjusted by driving the air cylinders to stretch out and draw back, so that the distance between the nozzles is conveniently and rapidly adjusted, and the length range of the spray cooling strip steel is adjusted.

The invention relates to the technical field of steckel mill equipment, and provides a steckel mill descaling machine header lifting hydraulic system. The output end of a ball valve communicates with the end P of a three-position four-way electromagnetic directional valve, and a plurality of piston mounting chambers with the same volume are formed in an oil cylinder body; the piston rod penetrates through the oil cylinder body and all the piston installation chambers and can move relative to the oil cylinder body, the sealing piston is installed in the corresponding piston installation chamber in a sliding mode and fixedly installed on the piston rod, and the piston cavity II communicates with the end B of the three-position four-way electromagnetic reversing valve. A rod cavity of each header lifting oil cylinder is communicated with the corresponding piston cavity I, a rodless cavity of each header lifting oil cylinder is communicated with the end A of the three-position four-way electromagnetic reversing valve, and the input end of the one-way valve is communicated with the end T of the three-position four-way electromagnetic reversing valve. Compared with the prior art, the production cost is lower, the electrical control is simpler, and the performance is more stable and reliable.

The invention discloses a dynamic coiling tension control method for a steekle mill. The method specifically comprises the following steps that S1, strip steel parameters and rolling parameters are collected in real time; s2, constructing a dynamic tension calculation model based on the acquired data in the step S1; s3, tension is dynamically adjusted according to the rolling stage; s4, tension fluctuation is controlled in a closed-loop mode through a hydraulic servo system, and it is ensured that the tension fluctuation error is smaller than or equal to + / According to the method, real-time tension adjustment is conducted on factors such as the thickness, the width and the rolling speed of the current rolling pass, the phenomena of steel plate arching, head and tail swinging and steel plate snapping caused by mismatching of the tension of the curling furnace and front-back sliding at an outlet / inlet of the rolling mill are effectively controlled, and the occurrence probability of strip threading failure of the curling furnace and steel clamping of the rolling mill is reduced.

The invention provides an equipment spacing determination method and system, equipment and a storage medium, and relates to the technical field of metallurgical steel rolling, and the method comprises the following steps: determining speed influence parameters influencing the equipment according to the thickness of a plate in combination with the maximum running speed of a connecting roller way; according to the speed parameter of the plate and the length parameter of the plate, the minimum distance between the influencing device and the next machining device is determined by combining the speed influencing parameter of the influencing device; according to the installation requirement of the non-influence equipment or the connection relation between the adjacent non-influence equipment and the adjacent machining equipment, the minimum distance between the non-influence equipment and the next machining equipment is determined; and according to the minimum distance corresponding to the influencing equipment and the minimum distance corresponding to the non-influencing equipment, an equipment distance strategy between the steckel mill and the cooling bed equipment is generated. According to the invention, the speed smooth transition of the plate from the steckel mill to the cooling bed equipment in the whole process is realized, the space interference probability is reduced, and the transportation stability is improved.

The invention discloses a control method for automatically correcting roll gap deviation in the rolling process of a steckel mill, and belongs to the technical field of metallurgical automation control. The method comprises the steps that the thicknesses of outlets in the two sides of the head of strip steel are calculated according to the predicted rolling force of the head of the strip steel of the current pass and the rigidity, corresponding to the predicted rolling force, of the two sides of the mill; calculating a deviation pre-control value of the roll gap head before threading according to the outlet thicknesses on the two sides of the strip steel head, the rigidity on the two sides corresponding to the predicted rolling force and the plasticity of the rolled piece head; after the steekle mill bites steel, a certain amount of rolling force deviation is sampled, processed and then locked; the roll gap deviation on the two sides is corrected in real time according to the actual rolling force deviation change; after the steckel mill of the current pass throws steel, the roll gap deviation pre-control value of the next pass is preset according to the roll gap deviation before steel throwing; and after the steekle mill bites steel in the next pass, the above processes are repeated until the steekle mill finishes rolling in the last pass, and the roll gap deviation is preset again according to the predicted rolling force. The method solves the problem of strip steel deviation in the reversible pass rolling process of the steekle mill, and has positive significance in improving the rolling stability.

The present application relates to the technical field of steel rolling production, in particular to a method for producing copper-containing antibacterial martensitic stainless steel black coil by a furnace rolling mill, which solves the problem that steel coil edge cracking and peeling defects easily occur in the rolling process of the copper-containing antibacterial martensitic stainless steel. The method mainly comprises the processes of slab preheating, heating, descaling, rough rolling, finish rolling, coiling and annealing, etc. By setting the heating temperature, the descaling water pressure and speed, the rough rolling and finish rolling pass compression ratio and controlling the annealing temperature, the high-quality hot-rolled black coil is finally rolled out, the defects such as steel coil edge cracking and surface peeling occurring in the process of preparing the copper-containing antibacterial martensitic stainless steel are effectively eliminated, and the plate width and the thick range of large coil plate of the copper-containing antibacterial martensitic stainless steel rolling production are further improved, so that the overall production efficiency and quality of the copper-containing antibacterial martensitic stainless steel are greatly improved.

The invention relates to the technical field of hydraulic cylinders, in particular to a steckel mill high-temperature area hydraulic cylinder and a using method thereof.The steckel mill high-temperature area hydraulic cylinder comprises a cylinder body and a water-cooled jacket connected to the outer wall of the cylinder body, the water-cooled jacket is in a hollow barrel shape and connected to the outer side wall of the cylinder body in a wrapping mode, and a flow channel is distributed in the water-cooled jacket; a water inlet and a water outlet are respectively formed in two ends of the flow channel, specifically, a cooling medium is introduced from the water inlet and is discharged from the water outlet through the flow channel. A cooling medium can be connected to cool the hydraulic cylinder body and the hydraulic oil, sealing is protected while the temperature of the hydraulic cylinder body and the temperature of the hydraulic oil are reduced, the performance of the hydraulic cylinder in a high-temperature area can be remarkably improved, the service life is prolonged, and the failure rate is reduced.

The invention discloses a steekle mill side guide plate control method, and belongs to the technical field of ferrous metallurgy equipment. The method comprises the steps that in response to user input, rolling passes of the steekle mill and rolled piece parameters of each pass are obtained; the current rolling pass and the current rolled piece parameters are obtained; wherein the current rolling pass is used for representing the current rolling times of the steekle mill; determining the position of a side guide plate according to the current rolling pass; determining the opening value of the side guide plate according to the position of the side guide plate and the current rolled piece parameters; and controlling the side guide plate to act according to the opening value, so that the opening amount of the side guide plate reaches the opening value. The position of the side guide plate is determined according to the current rolling pass, the opening value of the side guide plate is determined according to the position of the side guide plate and the current rolled piece parameters, and the opening of the side guide plate is automatically adjusted along with changes of the rolling pass and the rolled piece parameters. The control capability of the side guide plate on the shape of a rolled piece is improved, and the problem that the rolled piece is impacted and abraded due to the fact that the opening degree of the side guide plate is too small is avoided.

The invention provides a rolling method of a hard alloy N06625 in a steckel mill. The rolling method comprises the following steps: a first rolling process; the plate blank is fed into a stepping type heating furnace to be heated, the temperature range of each heating stage of the stepping type heating furnace and the tapping temperature range are set, and meanwhile the furnace staying time is set; rolling the discharged plate blank by using a four-roller reversible roughing mill to obtain a blank plate; surface cracks of the blank plate are ground; in the second rolling process, the blank plate is fed into the walking beam furnace for secondary heating, the temperature range of each heating stage and the tapping temperature range of the walking beam furnace are set, and meanwhile, the furnace staying time is set; rolling the discharged blank by using a four-roller reversible roughing mill to obtain a middle blank plate; a double-rack steekle mill is used for rolling the middle blank plate; and carrying out layer cooling and coiling. By means of the rolling method, hot rolling and coiling rolling of the hard alloy N06625 can be smoothly achieved, and therefore the requirements of downstream procedures are easily met while the production cost of the hard alloy N06625 is reduced.

The invention provides a plate after-rolling speed control method and device and a storage medium, and relates to the technical field of metallurgical steel rolling, and the method comprises the steps that the last-pass rolling speed of a steekle mill, the cooling bed feeding period of a cooling bed device and the speed parameter of a connecting roller way are obtained; according to the thickness parameters of the sub-mother board, determining speed influence parameters of the processing equipment on the sub-mother board; according to the rolling speed of the last pass, the feeding period of the cooling bed, the speed parameter of the connecting roller way and the speed influence parameter of the machining equipment, the distance parameter between the adjacent machining equipment is combined, and the time interval that the adjacent sub-mother plates do not interfere with each other before arriving at the cooling bed equipment is determined; according to the time interval, in combination with the length parameters of the daughter board and the mother board, obtaining a constraint relationship between the speed and the position of the connected roller way; and determining a speed control strategy of the connected roller way according to the constraint relation. The plate rolling stability of the steckel mill production line is improved through the speed and position constraint relation of the connected roller ways.

The invention discloses a rolling method of a thin-gauge 9Cr heat-resistant steel single-stand steekle mill, and belongs to the technical field of ferrous metallurgy. Comprising the steps that raw materials are prepared, specifically, blanks meeting requirements are selected, and the blanks are checked and cleaned; plan arrangement is conducted, specifically, arrangement is conducted at the rolling tonnage of 300-1000 in the working roller period; heating is conducted, specifically, the blank is fed into a heating furnace to be heated, the heating temperature ranges from 1240 DEG C to 1260 DEG C, and the time in the furnace ranges from 150 min to 300 min; descaling: descaling the surface of the heated blank by using a rough descaling box; rolling: rolling the blank for 9 passes to obtain 9Cr heat-resistant steel; wherein heat preservation is conducted through a coiling furnace in the fifth pass to the eighth pass, the temperature of the coiling furnace is larger than or equal to 850 DEG C, the reduction rate of the last pass is smaller than or equal to 15%, and the roll bending force of each pass ranges from 700 KN to 800 KN. Through the steps of raw material preparation, plan arrangement, heating, descaling and rolling, the production of 9Cr heat-resistant steel by the single-stand steckel mill is realized. It is ensured that the thickness precision can meet the high tolerance requirement during rolling of the single-rack steckel mill; and meanwhile, the rolled plate shape is ensured, and the product quality is ensured.