714results about "Work cooling devices" patented technology

The invention discloses a strip composite device and a strip composite rolling system, relates to the technical field of strip rolling, and aims to solve the problems of complex flow and low production efficiency when a low-roller-number rolling mill is used for pre-compounding. The strip compounding device comprises a box body, a current compounding roller system, a power supply assembly and a pressing assembly, the current composite roller system is arranged on the box body and comprises an upper roller group and a lower roller group which are oppositely arranged; the upper roller group comprises a plurality of upper conductive rollers and upper insulating rollers which are arranged in parallel and alternately; the lower roller group comprises a plurality of parallel and alternately arranged lower conductive rollers and lower insulating rollers, and the upper conductive rollers and the lower conductive rollers are arranged in a staggered manner in the advancing direction of the to-be-compounded strip; the power supply assembly is arranged in the box body, the power supply assembly is electrically connected with the upper conductive roller and the lower conductive roller, and the power supply assembly, the upper conductive roller, the lower conductive roller and the strip pressed between the upper roller set and the lower roller set form a conductive loop; the pressing-down assembly is arranged on the box body. The strip composite rolling system comprises an uncoiler, a strip composite device and a twenty-high roll mill.

The invention discloses a full-automatic cold pilger mill, and relates to the technical field of cold pilger mills, the full-automatic cold pilger mill comprises a case and a cold rolling assembly arranged in the case and used for rolling pipe fittings, the case is internally provided with a driving assembly used for driving the cold rolling assembly to work, and the full-automatic cold pilger mill further comprises a water cooling assembly arranged in the case and used for cooling the rolled pipe fittings; the water cooling assembly comprises a water spraying pipe movably connected into the machine box, a telescopic pipe is movably connected into the water spraying pipe, the telescopic pipe and the cold rolling assembly are connected through a fixing base, the characteristic that the machine frame reciprocates left and right is utilized, a cooling liquid outlet moves from right to left, and therefore the spraying range of pipe fittings is enlarged, and the spraying efficiency is improved. Meanwhile, the cooling liquid can be sprayed on the surface of the pipe fitting from the periphery, so that the spraying range of the cooling liquid on the surface of the pipe fitting is further expanded, the surface of the pipe fitting is cooled uniformly, the spraying of the cooling liquid is free of omission and dead angles, the cooling effect of pipe fitting rolling is ensured, and the cold rolling quality of the pipe fitting is ensured.

The invention belongs to the technical field of aluminum alloy production, and particularly discloses a low-carbon environment-friendly method for producing a 3104 alloy blank with a high secondary aluminum proportion, which comprises the procedures of smelting, melt purification, online degassing filtration, continuous casting and triple continuous rolling, and is characterized in that alloy components are optimized, secondary aluminum waste is used in a large proportion, the Fe content is increased, and the production cost is reduced. Iron and elements such as manganese in the aluminum alloy form intermetallic compounds, the intermetallic compounds can serve as heterogeneous nucleation, obviously refine alloy grains during casting and increase Fe content, the performance of the 3104 alloy blank is improved, meanwhile, aluminum is replaced with iron, the main material cost can be reduced, in addition, due to the fact that the rolling temperature of an inlet of each rack is high, and meanwhile the finish rolling temperature is also high, the service life of the 3104 alloy blank is prolonged. The self-tempering effect is achieved, internal dislocation of materials is eliminated, the blank edge cracking condition is improved, strip breakage caused by the edge cracking problem in the subsequent rolling process is avoided, safe production is guaranteed, the main material cost is reduced, meanwhile, the blank performance is improved, the 3104 alloy blank is efficiently produced in a high-quality mode, and the purposes of low carbon and environment protection are achieved.

The invention relates to the technical field of copper plate strip machining, and provides an advanced copper plate strip continuous rolling technology which comprises the steps that S1, a copper ingot with the copper content of 99.9% or above is selected, and raw materials are obtained through saw cutting and surface polishing; s2, the treated copper ingot is heated in a heating furnace, and the internal temperature uniformity of the copper ingot is guaranteed; s3, a roughing mill is used for rolling the heated copper ingot, and rough rolling is conducted for 2-3 passes; s4, the copper strip subjected to rough rolling enters an intermediate rolling mill, and intermediate rolling passes are 3-5 times; s5, the copper plate strip subjected to intermediate rolling enters a finishing mill, and the finishing pass is 3-4 times; and S6, on-line cooling is conducted, specifically, the copper plate strip obtained after finish rolling enters an on-line cooling system immediately. Through early-stage accurate saw cutting and polishing treatment, the initial quality of the copper plate strip is guaranteed, smooth proceeding of subsequent rolling procedures is guaranteed, the multi-pass continuous rolling process of rough rolling, intermediate rolling and finish rolling is combined with online cooling, and through strict parameter control, the production efficiency is improved, the energy consumption is effectively reduced, and the production cost is reduced.

The 430-series stainless steel has good corrosion resistance and oxidation resistance, and is widely applied to the fields of buildings, decoration, household appliances, kitchen ware and the like due to the excellent performance and relatively low price of the 430-series stainless steel. As cover annealing is not carried out on 430, and the 430 is directly subjected to acid pickling and cold rolling through air cooling after hot rolling, adverse factors which influence cold rolling, such as edge cracking, high hardness of heads and tails, high strength and the like, are easy to occur in cold rolling. According to the annealing-free direct rolling method for the low-cost 430 stainless steel, slow cooling and heat preservation are conducted on the hot-rolled 430 stainless steel, the microscopic structure of the 430 stainless steel has the obvious grain recovery characteristic, the yield strength and tensile strength are reduced, the hardness is reduced, the plasticity is improved, the problems that the low-cost 430 stainless steel is high in hardness and poor in plasticity due to the fact that annealing is not conducted can be remarkably solved, cold rolling is better facilitated, and the service life of the low-cost 430 stainless steel is prolonged. And after slow cooling treatment, the problems of edge cracking, difficult rolling and the like do not occur in the cold rolling process of 430. The slow cooling heat preservation cover has an improvement effect on solving the problem of low-cost rolling 430 in the cold rolling process, and development of a low-cost cover-free annealing process and trial production of new products are facilitated.

According to the multi-path cooling control method for the non-adjustable flow of the cooling spray box after hot plate rolling, the mode that an annular rail is combined with a trolley is adopted, the trolley bears a sample through a sample bearing table to do annular motion, the annular rail is an oval rail comprising two parallel linear segments and two semicircular segments, and at least one cooling spray box is arranged along the linear segment rail; the cooling area can be infinitely lengthened at any workpiece speed; according to the cooling starting temperature, the water cooling speed, the cooling stopping temperature, the cooling stopping time between the cooling areas and the production line cooling spray box layout of the N cooling areas determined by the experiment, the experiment device is configured according to different spray box opening modes, the cooling experiment is carried out, and spray box opening mode parameters corresponding to the optimal cooling speed of the N cooling areas are obtained; carrying out cooling control after rolling on corresponding sample production; besides, the method is implemented under the condition basically consistent with the actual working condition of the production line, so that the product design output and the production line process control are more accurate and efficient, the product research and development speed can be effectively increased, the process control precision is improved, and the production line trial-manufacturing cost is reduced.

The invention discloses an after-rolling stable position reduction type online cooling device and a control method thereof, and relates to the technical field of hot rolling cooling, the after-rolling stable position reduction type online cooling device comprises N unit type cooling mechanisms arranged in the moving direction of a cooling roller way, and each unit comprises a lifting assembly, a cooling assembly, a supporting assembly, a driving assembly and a control system. The lifting assembly drives the grating type movable framework to vertically ascend and descend through a spiral elevator, the upper collecting pipe is driven to adjust the distance between the upper collecting pipe and a hot-rolled product, the supporting assemblies are symmetrically distributed through supporting beams with I-shaped sections, and the height of the overall structure is reduced. The control method is based on unitized layout, the upper headers of a single unit are configured into 5-8 groups, the height, the flow and the cooling mode are independently regulated and controlled by the control system, and different process requirements are dynamically and accurately met. Through structure simplification, load distribution optimization and modular control, the problems that a traditional device is poor in stability, low in regulation and control precision and high in maintenance cost are solved, the cooling effect is remarkably improved, and the process adaptability and economical efficiency are improved.

The invention provides a production method of a steel wire rod and a welding wire, and the production method of the steel wire rod comprises the following working procedures sequentially performed on a square billet: a heating working procedure: the square billet sequentially passes through a preheating section, a heating section and a soaking section, the temperature of the preheating section is controlled to be 820-870 DEG C, the temperature of the heating section is controlled to be 950-1000 DEG C, the temperature of the soaking section is controlled to be 1000-1040 DEG C, and the total heating time is 70-90 minutes; in the rolling procedure, rough rolling, intermediate rolling and finish rolling are conducted on the heated square billet to obtain a wire rod, the finish rolling inlet temperature is controlled to be smaller than or equal to 850 DEG C, the rolling speed is controlled to be 100-110 m / s, and the spinning temperature is controlled to be 780-810 DEG C; and a cooling process: after spinning, controlling the cooling speed to be less than or equal to 0.6 DEG C / s, and cooling the wire rod to 500-550 DEG C. According to the production method of the steel wire rod, the steel wire rod has a small-size structure, drawing is facilitated, the mechanical property of the same circle is uniform, the thickness of the oxide layer is uniform, and shelling is facilitated.

The invention discloses a manufacturing method of an ultra-large seamless steel pipe with the diameter of 2000 mm, and belongs to the technical field of seamless steel pipe manufacturing in the metallurgical industry. The method comprises the following steps: heating a solid round tube blank, carrying out skew rolling by adopting a micro-expanding process to obtain a pierced billet, manufacturing the pierced billet into a hollow billet with an expanded diameter by utilizing a skew rolling expanding process, further expanding the diameter by using a flattening skew rolling process and simultaneously improving the dimensional precision and the surface quality of the hollow billet, and obtaining a semi-finished steel tube with the diameter of 2000mm by adopting a controlled rolling sizing process. And the semi-finished steel pipe is subjected to heat treatment, flaw detection and finishing procedures to directly obtain the ultra-large seamless steel pipe finished product of 2000 mm According to the method, materials are formed through one-time heating, only pipe blank heating is needed, heat treatment and reheating are not needed, energy is saved, and performance is improved; the on-line structure regulation and control method taking controlled cooling as the core thoroughly turns the passive situation that seamless steel pipes excessively depend on alloying and off-line heat treatment in the past, breaks through the bottleneck of the traditional process, and develops a new process and a new method for high-quality and high-efficiency manufacturing of the steel pipes.

The invention discloses a production method of a non-annealing cold heading steel hot-rolled wire rod, and relates to the technical field of steel production, the method comprises the following steps: selecting a steel billet meeting the production specification requirement of the cold heading steel wire rod, and carrying out coping finishing and preheating treatment on the steel billet to be processed; the steel billet is conveyed to a large-compression-ratio rolling unit, the hot rolling process is monitored in real time, hot rolling segmented regulation and control are conducted, multi-pass temperature gradient rolling is achieved, and a cold heading steel wire rod formed through hot rolling is obtained; and the hot-rolled cold heading steel wire rod is conveyed to a heat preservation tunnel furnace, a cold heading steel wire rod finished product is obtained through segmented controlled cooling and surface treatment, and production of the annealing-free cold heading steel hot-rolled wire rod is achieved. According to the method, the advanced rolling mill unit with the large compression ratio is adopted for producing the cold heading steel wire rods of different specifications, the heat preservation tunnel furnace is adopted, the cooling temperature and the cooling speed of the wire rods are controlled, production of the annealing-free cold heading steel hot-rolled wire rods is achieved, the production process is greatly simplified, the production period is shortened, the production cost is reduced, and the production efficiency is improved.

The present application relates to a kind of large thickness submarine pipeline steel plate and its production method, by the optimization design steel plate component of low-carbon low-alloy component, production method is with the special controlled rolling process of five-stage heating+recrystallization zone low temperature large reduction rolling+intermediate billet instant cooling+non-recrystallization zone high temperature large reduction rolling, and the multi-stage controlled cooling process of high temperature zone air cooling redistribution+ferrite zone cooling+waiting temperature+bainite zone cooling+air cooling self tempering cooling.The product steel plate of the present application has higher acicular ferrite proportion, and the average grain size of ferrite is finer, 3~6 μm, so that the steel plate has good strength and toughness match, the steel plate has higher strength, yield strength ≥500MPa, tensile strength ≥630MPa, and impact energy KV2 At-60 ℃, ≥250J.

The invention discloses a hot continuous rolling preparation method of a single-sided stainless steel composite plate, which comprises the following steps of: milling and grinding one surface of each of two base materials according to a relative shape complementation mode; the surface is machined into an irregular concave-convex surface comprising n planes which are sequentially connected in the transverse direction or the longitudinal direction, the base material is a non-uniform-thickness blank with the thickness non-monotonically changing in the transverse direction or the longitudinal direction, and n is larger than or equal to 2; assembling according to the stacking sequence of the base material, the composite material, the composite material and the base material to prepare a composite blank; the composite blank is heated at the temperature of 1210-1270 DEG C, then hot continuous rolling is conducted, rolling is conducted for 1-3 passes at the temperature of 1180-1240 DEG C, and the rolling reduction is larger than or equal to 30 mm; rolling is conducted for 3-5 passes at the temperature of 1050-1170 DEG C, and the rolling reduction is larger than or equal to 28 mm; the initial rolling temperature is larger than or equal to 950 DEG C, the finish rolling temperature is larger than or equal to 850 DEG C, then cooling is conducted, and coiling is conducted at 560-660 DEG C; and flattening the obtained composite coil, and then carrying out stack cooling between two steel plates with the temperature of Tf-Tf + 150 DEG C.

The invention discloses a production method of a T2+Q355B copper steel rolled composite plate. The technological process comprises the steps of assembling, heating, rolling, stack cooling, finishing, flaw detection and warehousing. A T2 + Q355B copper steel rolled composite plate with excellent bonding strength, mechanical property and conductivity is obtained by adopting a vacuum rolling composite technology, a symmetric assembly technology and a low-speed deformation technology and utilizing wide and thick plate production line equipment and technical advantages, the thickness of a base material ranges from 5 mm to 40 mm, the thickness of a composite layer ranges from 1 mm to 20 mm, the width is smaller than or equal to 3600 mm, the yield strength is larger than or equal to 250 Mpa, the tensile strength ranges from 350 Mpa to 600 Mpa, the shear strength is larger than or equal to 120 Mpa, and the composite layer T2 copper conductivity IACS is larger than or equal to 85%. The intergranular corrosion crack rate is 0. The product can be widely applied to the fields of high-voltage electric appliances, ship manufacturing, new energy equipment and the like, and has the potential of replacing traditional products.

The invention provides a hot-rolled dual-phase steel section temperature uniformity control device and method.The control device comprises a water spraying adjusting system and a rolling process parameter optimizing system, and the water spraying adjusting system comprises a strip steel cooling water collecting pipe between finishing mill racks and a finishing mill rack front end side water spraying collecting pipe; the strip steel cooling water collecting pipe between the finishing mill racks is used for cooling the strip steel between the finishing mill racks, so that the surface temperature of the strip steel finally reaches the target set temperature of a finishing mill outlet; the water spraying header at the front end side of the finishing mill frame is used for differentially adjusting the transverse temperature of the rolled piece, so that cooling water flow forms a uniform fan-shaped cooling area on the surface of strip steel, and the temperature balance of the cross section of the rolled piece is ensured; and the rolling process parameter optimization system is used for generating optimized rolling process parameters according to the initial parameters of the rolled piece and transmitting the optimized rolling process parameters to the rolling mill control system. The strip steel section temperature uniformity of hot-rolled dual-phase steel between finishing mill racks is effectively improved, it is guaranteed that the transverse section temperature difference is within the range of 13 DEG C, and the longitudinal temperature difference is controlled within the target value range of + / -15 DEG C.

The invention relates to the technical field of steel rolling, and discloses a Q355B steel hot rolling process optimization method based on dynamic temperature control, which comprises the following steps: blank pretreatment, dynamic heating control, high-pressure water descaling, rough rolling process, finish rolling process, laminar cooling and coiling process. According to the method, a collaborative system of multi-section variable-temperature heating and intelligent temperature control is constructed, temperature distribution in a furnace and the heating rate are monitored and dynamically adjusted in real time, it is guaranteed that the core surface temperature of a plate blank is uniform and consistent, thermal stress and the internal crack tendency in the heating process are eliminated, and a high-temperature blank uniform in structure and stable in performance is provided for follow-up rolling; meanwhile, the high-pressure water descaling system optimizes jet flow parameters and introduces chemical additives, so that a protective layer is formed while oxide scales on the surface are removed, the surface cleanliness and quality of the plate blank are improved, and product defects caused by incomplete descaling and surface damage are avoided.

The invention relates to an upper and lower roller reducing independent transmission universal rolling mill and a control method thereof, and belongs to the technical field of metallurgy. The rolling mill comprises a universal rolling rough rolling unit, a middle rolling unit and a universal rolling finish rolling unit which are sequentially arranged along a rolling line, a horizontal roller set of each unit is of an upper and lower roller reducing structure and is provided with an independent transmission system, and a gearbox and a transmission shaft are driven by an independent motor to achieve roller separation control. The middle rolling unit is a reducing edging mill, and temperature control units are arranged in front of and behind the rough rolling unit and the finish rolling unit respectively. The rolling method comprises the steps of adjusting the roller diameter ratio, synchronously adjusting the dip angle of the universal spindle and the basic height of the rolling mill, conducting gradient deformation rolling, dynamically adapting to a rolling model and the like. Through cooperation of independent transmission and reducing, accurate matching of the speeds of the upper roller and the lower roller is achieved, deformation uniformity is improved, the total motor power is reduced, an adjustable cooling nozzle and intelligent model optimization are combined, a product has the surface layer ultra-fine grain structure and core toughness, and the yield and market competitiveness are remarkably improved.

According to the high-quality high-speed wire rolling method for the low-alloy high-speed steel wire rod based on continuous casting forming, gradient heating is conducted through the step type heating furnace, preheating of a continuous casting blank is uniform, and phase change stress is reduced. The initial rolling temperature is set and controlled to be 1060-1100 DEG C, the finish rolling temperature is controlled to be 950-1050 DEG C, the spinning temperature is controlled to be 980-1030 DEG C, and the highest rolling speed is 25 m / s. And after rough rolling, induction heating temperature compensation is carried out to increase the surface temperature of the blank, the temperature is set to be 1000-1040 DEG C, the temperature compensation time is controlled to be 10-20 s, and surface cracks and head wind caused by too low temperature are prevented. And closing the cover plate after spinning, adopting heat collection, immediately entering a slow cooling tunnel furnace for furnace cooling after doffing, and discharging for annealing after 48 hours or longer. A continuous casting technology is used for replacing a traditional die casting technology, controlled rolling and controlled cooling in the rolling process are matched, composition segregation is remarkably reduced, the core quality is improved, carbides are effectively refined, the uniformity of products is guaranteed, the production efficiency is improved, the production cost is reduced, and the influence on the environment is reduced; and a new process and a new route are provided for producing the high-quality low-alloy high-speed steel wire rod.

The invention discloses a rolling treatment process for one-step forming of w-shaped hinge section steel, and particularly relates to the technical field of rolling treatment processes, which comprises the following steps: S1, heating; s2, descaling is carried out; s3, rolling is conducted; s4, cooling; s5, straightening; s6, saw cutting; and S7, quality inspection. According to the rolling treatment technology for one-time forming of the W-shaped hinge section steel, the efficient production process can be achieved, the procedures from heating, descaling, rolling to cooling are closely connected, the automation degree is high, the production period is greatly shortened, the production efficiency is improved, and the production cost is reduced. Meanwhile, strict quality control measures are taken in each key step, such as a computer temperature control and pulse combustion technology in a heating process, a high-pressure system and optimized parameters in a descaling process, precise equipment and precise control in a rolling stage, and a three-section laminar cooling process in a cooling link. Therefore, the dimensional accuracy and the cross section shape of the product are ensured.

The invention provides a seamless steel tube and a preparation method thereof. The preparation method comprises the following steps that S1, metallurgical raw materials are smelted, and a blank is obtained; s2, perforating the blank to obtain a tubular billet; s3, the tubular billet is rolled, an obtained pierced billet is subjected to first rapid cooling, the first rapid cooling comprises first rapid cooling and second rapid cooling, and the temperature of the pierced billet is reduced by 30-150 DEG C in the first rapid cooling process; the temperature of the pierced billet is reduced by 30-150 DEG C in the second rapid cooling process; s4, the pierced billet subjected to first rapid cooling is subjected to sizing or reducing treatment, an obtained steel pipe is subjected to second rapid cooling, and the temperature of the steel pipe subjected to second rapid cooling ranges from 550 DEG C to 650 DEG C; and S5, the steel pipe obtained after second rapid cooling is subjected to air cooling. By reasonably arranging the cooling path, the hot-rolled seamless steel pipe with small straightness and ovality and excellent obdurability can be obtained.

The invention aims at disclosing a forming process and a hot rolling device of a high-thermal-conductivity titanium-aluminum composite plate, and relates to the technical field of titanium-aluminum composites.The forming process comprises the following steps that S1, laser texturing is conducted on the surface of a TC4 alloy titanium plate so as to remove an oxide layer on the surface of the TC4 alloy titanium plate, and the roughness of the surface of the TC4 alloy titanium plate is textured to Ra2.0 micrometers to Ra3.0 micrometers through laser; s2, the TC4 alloy titanium plate and the high-strength aluminum plate are prepared into a composite plate through a hot rolling composite technology, and the titanium face of the composite plate faces the ground; s3, the hot-rolled composite plate passes through a guide roller in an upward inclined mode and then is discharged in an inclined downward mode; s4, the discharged composite plate is cut into a plurality of plates with the same size according to the set size, and the plates are arched; the method has the beneficial effects that oxides on the surface of the TC4 alloy titanium plate are removed through laser texturing, new titanium alloy is exposed, metal bonding and mechanical meshing of a titanium-aluminum interface are remarkably enhanced, and the heat conduction performance and bonding strength of the composite plate are fundamentally improved.

The present invention discloses an on-line cooling device with post-rolling position stabilization and configuration reduction and its control method, which relates to the technical field of hot rolling cooling. It includes N unitary cooling mechanisms arranged along the moving direction of the cooling roller table. Each unit comprises a lifting assembly, a cooling assembly, a support assembly, a driving assembly and a control system. The lifting assembly drives the grid-type moving framework to vertically lift through a screw lift, driving the upper header to adjust the distance from the hot-rolled product. The support assembly is symmetrically distributed with I-shaped cross-section support beams, reducing the overall structural height. The control method is based on unitized layout. The upper headers of a single unit are configured into 5 to 8 groups, and the height, flow rate and cooling mode are independently regulated by the control system to achieve dynamic and precise adaptation to different process requirements. The present invention solves the problems of poor stability, low regulation accuracy and high maintenance cost of traditional devices by streamlining the structure, optimizing the load distribution and modular control, significantly improving the cooling effect and enhancing the process adaptability and economy.

The invention relates to the field of equipment control, in particular to a water tank penetrating air source self-adaptive adjusting method and system. The method comprises the following steps: acquiring a finishing mill start-stop signal and a wire rod head position signal in real time; dynamically calculating the residual distance from the head of the wire rod to the penetrating water tank, and generating a dynamic delay opening threshold value; the electromagnetic valve is controlled to open the pneumatic ball valve in a sectional manner; monitoring the covering length of the wire rod and converting the covering length into an equivalent gas resistance value; a dynamic pressure compensation amount is generated through a pressure closed-loop controller; the opening degree of the pneumatic ball valve is adjusted accordingly; when the finishing mill stops, the pneumatic ball valve is triggered to be closed, and a gradient pressure relief turn-off program is executed if necessary. By means of the distributed sensor array and the multi-mode recognition neural network, real-time accurate monitoring and analysis of the operation state of the pump set are achieved, dependence of post personnel is reduced, and the automation degree and stability are improved. And by dynamically optimizing the control strategy, the pump set system operates efficiently, energy waste is reduced, the energy utilization efficiency is improved, and the production cost is reduced.

The invention discloses a novel process for realizing online softening and improving cold heading performance of SCM435 series cold heading steel, and relates to the technical field of cold heading steel processing. The invention discloses a novel process for realizing online softening and improving the cold heading performance of SCM435 series cold heading steel. According to the method, S1, steel billet continuous casting forming, S2, steel billet precise heating, S3, low-temperature rolling molding, S4, wire rod standard spinning, S5, stelmor cooling and S6, heat preservation vestibule slow cooling are carried out, the uniformity of the process performance is remarkably improved, by innovatively optimizing the spinning coefficient and the roller way speed, it is fundamentally guaranteed that the disc shape is neat, the heat dissipation conditions of all positions of the wire rod in a slow cooling vestibule are consistent, and the heat dissipation efficiency of the wire rod is improved. Therefore, uniform transformation of a whole-roll structure and a same-circle structure is achieved, the consistency of cold heading performance is greatly improved, the cracking risk in the cold heading process is effectively reduced, the technology is remarkable in energy-saving and consumption-reducing effect, rolling waste heat is fully utilized for on-line softening, the traditional off-line reheating and annealing procedure is completely omitted, and energy consumption can be saved by about 30% or above.

The invention discloses a multi-roller system efficient non-ferrous metal fine control calendering unit, and relates to the related field of non-ferrous metal processing, the multi-roller system efficient non-ferrous metal fine control calendering unit comprises a workbench located on the horizontal ground, a preheating module is installed at the upper end of the left side of the workbench, a non-ferrous metal plate extends into the preheating module, and the other end of the non-ferrous metal plate extends into a calendering frame; the bottom of the calendering frame is fixed to the top of the workbench. A first conveying pipe is further connected to one side of the air conveying piece, one end of the first conveying pipe is arranged on one side of the limiting mechanism, and a multi-position cooling mechanism is further arranged at the upper end of the limiting mechanism and achieves cooling treatment on the non-ferrous metal plate in different directions. According to the multi-roller-system efficient non-ferrous metal precise control calendering unit, the multi-direction cooling mechanism is arranged, the upper end and the lower end of a calendered non-ferrous metal plate can be subjected to multi-direction cooling treatment through the arrangement of the multi-direction cooling mechanism, and later machining of the calendered non-ferrous metal plate is facilitated.

The invention relates to the technical field of high-temperature alloy materials, and provides an N10276 profiled bar and a forming method thereof.The surface of a blank is coated with a three-layer composite sheath, the blank is heated in a partitioned and gradient mode, the temperature of a side wing plate area is 50-100 DEG C higher than that of a web plate area, the metal fluidity of a side wing plate is improved, cogging rolling, four-roller reciprocating finish rolling, partitioned and gradient cooling and secondary solution treatment are conducted, and the N10276 profiled bar is obtained. A nitric acid and hydrofluoric acid mixed solution is used for pickling and stripping the composite sheath, an oxide layer is removed, intergranular corrosion is avoided, a triple sheath synergistic protection mechanism is adopted, oxygen is physically isolated by outer stainless steel, and heat loss is inhibited by a middle yttria-stabilized zirconia ceramic fiber layer.

A system configured to roll a metal into a foil. The system includes rollers spaced apart to receive the metal therebetween. The rollers are configured to press against the metal to roll the metal into the foil. A cooling sub-system is configured to cool the rollers with a coolant, thereby cooling the foil in contact with the rollers.

The application discloses a preparation method of a rail with low residual stress and corrosion resistance, and comprises the following steps: S1, cooling the steel rail after rolling; S2, adopting light pressing down to straighten the steel rail after the cooling for the first time; S3, heating the rail bottom of the steel rail after the first time of straightening; and S4, using multiple pairs of straightening rollers to straighten the steel rail after the heating for the second time, wherein each pair of straightening rollers symmetrically straightens the rail head and the rail bottom. The application can reduce the residual stress of the rail bottom and improve the corrosion resistance of the rail.

The present invention discloses a processing device for metal sheet rolling, including a rolling mechanism, a stress relief mechanism, and a cooling system. The rolling mechanism includes a driven roller, an active roller, a motor, a lifting screw, a base, and a connecting beam. The driven roller is rotatably connected to the connecting beam, and the active roller is fixedly connected to the output shaft of the motor. When the motor is started, the metal sheet to be rolled passes between the driven roller and the active roller, and the stress relief mechanism and the cooling system also work at the same time, thereby completing the rolling, stress relief, and cooling of the metal after rolling. The present invention provides a screw rod and a stress relief mechanism, so that the device can adapt to the processing of metal sheets of different thicknesses, and can eliminate the internal stress in the metal sheet, so that the reliability of the metal sheet will not be reduced due to the internal stress.

The invention discloses a process for improving a longitudinal shearing camber of QSTE650TM girder steel. The process comprises the steps of plate blank preparation, rolling and cooling, straightening treatment and longitudinal shearing machining. In the slab preparation step, the length of a slab is shortened to 8.5-9 m; in the rolling and cooling step, a plate blank is subjected to rough rolling and finish rolling firstly, and strip steel obtained after finish rolling is cooled; in the cooling process, air cooling is firstly carried out to 880-900 DEG C, then laminar cooling is carried out, the laminar cooling rate is 20-25 DEG C / s, and the final cooling temperature is 550-580 DEG C; the straightening treatment step comprises a rough straightening process and a fine straightening process; in the rough straightening process, the pressure of a rough straightening machine is 18-20 MPa; in the fine straightening process, the fine straightening insertion amount is controlled to be 30%-45% of the thickness of the strip steel, and the pressure of a fine straightening machine is 8-10 MPa; in the slitting processing step, the blade gap of a slitting machine is controlled to be 0.15-0.2 mm, and the winding tension is controlled to be 120-150N / mm. According to the method, the camber degree of the QSTE650TM girder steel after longitudinal shearing is systematically reduced, and the camber degree of the QSTE650TM girder steel is controlled within 3 mm.

The invention relates to the technical field of material processing, and discloses a gradient structure metal matrix seamless pipe and a preparation method thereof, the preparation method comprises the following steps: (1) three-stage temperature control rolling forming; (2) interface reconstruction: applying a pulse electromagnetic field forming an asymmetric included angle with the rolling direction to the pipe rolled and formed in the step (1); the specific conditions of the pulse electromagnetic field are as follows: the magnetic field intensity is 0.5-5T; the pulse frequency f satisfies f = (v / d) * k; in the formula, v is the moving speed (m / s) of the pipe, d is the wall thickness (mm) of the pipe, and k is an adjustment coefficient 103-105; tissue regulation and control: performing selective laser impact and electromagnetic oscillation coupling treatment on the pipe obtained in the step (2); the impact energy density is 5-15 J / cm < 2 >, and the oscillation frequency is 20-100 kHz. The toughness of the pipe can be synergistically improved, the fatigue life is remarkably prolonged, and the corrosion resistance is improved in a breakthrough manner.