414results about "Roll speed control device" patented technology

The invention discloses a wide and thick steel plate for a 700MPa-grade corrosion-resistant anti-fatigue marine tendon pipe and a production method of the wide and thick steel plate. According to the component design of the wide and thick steel plate, CEIIW is controlled to be 0.41-0.47%, CEPcm is controlled to be 0.16-0.20%, low-Nb and low-Mo design is adopted, the phase change temperature is increased, and phase change of polygonal ferrite is promoted; rE solid solution, interface segregation and other effects are fully utilized to improve the strength and corrosion resistance, and the RE and Ca act together to purify molten steel and modify and disperse inclusions. On the basis of component design, low-temperature heating, rough rolling multi-stage thickness section high-temperature gradient deformation and low-temperature rolling, intermediate temperature-waiting blank rapid cooling after rough rolling is finished, finish rolling low-temperature deformation, multi-stage water cooling and other methods are adopted to obtain a microstructure of lath bainite, granular bainite and polygonal ferrite, and the proportion, size and distribution control of all phases is ideal; the method plays an important role in obtaining good comprehensive performance of the steel plate.

The invention discloses a rolling and annealing treatment process for a copper-steel composite strip, and relates to the technical field of material rolling, the process comprises the following steps: selecting a high-purity copper plate and a stainless steel plate, and depositing a nano nickel / graphene composite transition layer through a magnetron sputtering technology; the stainless steel layer is promoted to deform through front-section low-speed high-pressure rolling, and the copper layer interface bonding force is improved through rear-section high-speed low-pressure rolling; performing short-time local annealing by using a high-frequency induction coil; honeycomb-shaped micro-pits are formed in the stainless steel surface through the laser micro-texture technology, and the interface bonding force is improved in combination with the nano-nickel / graphene layer. Copper layer hardening is eliminated through low-temperature annealing, stainless steel recrystallization is promoted through medium-temperature annealing, and a nanometer precipitated phase is fixed through rapid water cooling; the heating rate is controlled, and nitrogen-hydrogen mixed gas is used for preventing oxidation; the rolling process and the annealing process are seamlessly connected, and the temperature, the stress and the atmosphere are detected in real time through an online monitoring system. The mechanical property, the corrosion resistance and the machining stability of the copper-steel composite strip are remarkably improved.

According to the high-strength ship plate with the excellent firework performance and the manufacturing method, a low-carbon chemical component system is adopted, V-N, Ti and other refined grain elements are added, formation of a ferritic structure in steel is promoted, RE elements are added, and the purity of the steel is improved; the manufacturing method comprises the steps of smelting, continuous casting, reheating, rolling, accelerated cooling and stacking slow cooling, the rolling process adopts two-stage controlled rolling, the first-stage rolling adopts a high-temperature fast rolling and high-pressure reduction process, and the second-stage rolling adopts a fast rolling process with high finish rolling temperature; the steel plate produced by using the method has excellent comprehensive mechanical properties and fire performance, the yield strength is greater than 485MPa, and the tensile strength is 560-620MPa; the yield strength of the steel plate after fire work is larger than 475 MPa, the tensile strength is 551-610 MPa, the percentage elongation after fracture is larger than or equal to 25.5%, and the impact absorption energy at the temperature of-80 DEG C is larger than 200 J.

The invention discloses a hot continuous rolling unit thickness detection and optimization method based on double closed-loop feedback control. In order to improve the problems of thickness control precision, response speed, a multi-rolling-mill cooperative operation mechanism and the like of an existing hot continuous rolling process, the comprehensive regulation and control method combining driving motor double-closed-loop speed regulation control, hydraulic cylinder pressing closed-loop control and thickness delay correction is provided. A multi-rolling-mill interconnection control system is constructed by coupling the rolling mills, the loops, the driving motors and the hydraulic cylinders, and high-precision dynamic adjustment of the tapping thickness is achieved. A double-closed-loop feedback control method is adopted, the rotating speed of a driving motor is adjusted by combining a rotating speed loop and a current loop, rolling force is dynamically adjusted through a hydraulic cylinder, and a thickness delay correction system is introduced to compensate thickness transmission errors between racks. According to the method, the thickness response time and overshoot of the hot rolling mill can be reduced, the thickness control precision and the system stability are improved, and the method has important guiding significance and engineering application value for high-precision hot continuous rolling production.

The invention belongs to the technical field of cobalt-based alloy machining, and particularly relates to high-strength cobalt-based alloy rolling machining equipment which comprises a rack and a cooling system, an upper roller and a lower roller are installed on the rack, one end of the rack is fixedly connected with a first motor, and the first motor is connected with the end of the lower roller through a reduction gearbox; and the other end of the lower roller is mounted on the bearing seat. The device further comprises a thickness acquisition module and a stress acquisition module. The thickness acquisition module and the stress acquisition module are used for monitoring the thickness and rolling pressure fluctuation of a rolled plate in real time, the control module is used for generating a corresponding fluctuation coefficient, and the thickness fluctuation coefficient and the stress fluctuation coefficient are comprehensively analyzed to generate an evaluation coefficient; and the roller spacing, the rolling speed and the working state of a cooling system are dynamically adjusted according to the evaluation result, so that the rolling process can adapt to material characteristics and working condition changes, the thickness uniformity of rolled plates is effectively improved, and the adverse effect caused by abnormal fluctuation of rolling pressure is reduced.

The invention discloses a hot-rolled strip steel coiling temperature control method and related equipment, and relates to the technical field of hot-rolled strip steel, and the method comprises the following steps: determining a constant finish rolling speed of strip steel through a quadratic programming optimization algorithm based on a finish rolling outlet speed set value and a target finish rolling temperature of the strip steel; controlling the strip steel to pass through a laminar cooling area at a constant finish rolling speed and reach a target finish rolling temperature; the steel type specification, the constant finish rolling speed and the target finish rolling temperature of the strip steel are input into the heat flow density prediction model, and the heat flow density self-adaptive coefficient of the laminar cooling area is output through the heat flow density prediction model; based on the heat flow density self-adaptive coefficient and the target coiling temperature of the strip steel, the head preset header water quantity of the strip steel is determined; and in the process that the strip steel passes through the laminar cooling area, the head actual header water quantity of the strip steel is adjusted to the head preset header water quantity, so that the coiling temperature of the strip steel reaches the target coiling temperature.

The invention relates to the technical field of metal plate rolling processing, and discloses a rolling strengthening method capable of reducing the rigidity of a metal plate, which comprises the following steps: applying an asymmetric rolling condition to an initial plate to enable the plate to generate a speed gradient in the thickness direction; the plate is subjected to one-pass large-rolling-reduction rolling, and a non-continuously-distributed shear band is formed; the rolled plate is heated to the dynamic recrystallization temperature interval of the plate, and multi-pass small-rolling-reduction warm rolling is conducted on the plate; and in the warm rolling process, dynamic recrystallization of a shear band is promoted to form a grain-refined continuous core layer, complete recrystallization of the surface structure of the plate is inhibited to keep the work hardening state of the plate, and therefore the metal plate with the rigidity lower than that of an initial plate is obtained. According to the invention, a soft core-hard shell heterostructure is constructed in the plate, high strength and low macroscopic rigidity are synergistically realized, the process controllability is strong, and the method is suitable for preparation of high-performance structural materials.

The invention discloses a production process of high-strength anti-distortion cold-rolled strip steel. The production process comprises the links of raw material preparation, cold rolling, heat treatment, surface treatment and quality detection. Selecting medium-carbon steel with specific components as raw materials, and controlling the tolerance of hot-rolled strip steel; a six-roller unit is adopted for multi-pass rolling in cold rolling, and a plate shape control technology is matched; continuous annealing and gradient quenching-isothermal tempering are applied to heat treatment, so that a specific structure gradient is formed, and the distortion rate is reduced; the surface is subjected to acid pickling, hot galvanizing and a nano ceramic composite coating, so that the corrosion resistance and the wear resistance are improved; and the quality is guaranteed through online detection and sampling inspection. The strip steel produced through the technology is high in strength, good in toughness, high in corrosion resistance and suitable for the high-requirement field.

The invention discloses a cold rolling speed-rolling force-tension cooperative control system and method for a composite board, and the method comprises the steps: firstly, achieving the multi-step dynamic prediction of rolling key parameters through the time sequence feature extraction capability of a GRU network based on the cold rolling data of a multi-layer composite board, and achieving the feed-forward control through online optimization; a fuzzy PID self-adaptive compensation strategy is combined, so that the influence of external disturbance and parameter time variation is effectively inhibited; and the two methods are combined in a weighted fusion manner, so that the perspectiveness is ensured, the real-time disturbance influence is considered, and the cold rolling speed-rolling force-tension cooperative control of the composite plate is realized. According to the cold rolling speed-rolling force-tension cooperative control system and method for the composite board, the control effect is better, higher generalization ability and anti-interference performance are achieved, the control precision and stability of cold rolling of the multi-layer composite board are greatly improved, and the system and method can be widely applied to the cold rolling production process of the multi-layer composite board.

This invention provides a thickness control method for a single-stand reversible cold rolling mill. The single-stand reversible cold rolling mill unit includes an inlet coiler, an outlet coiler, a mill body, a mill hydraulic system, an inlet thickness gauge, an outlet thickness gauge, an inlet speed gauge, an outlet speed gauge, an inlet tension gauge, and an outlet tension gauge. The single-stand reversible cold rolling mill unit also includes an S-roll, with S-rolls at both the inlet and outlet of the unit. The S-roll can rotate 180°, with the upper roll of the S-roll able to rotate to the lower roll position and the lower roll of the S-roll able to rotate to the upper roll position. The 180° rotation causes the strip steel to wind in an S-shape on the S-roll. The thickness difference of the strip steel is eliminated by adjusting the speed of the inlet S-roll to control the metal flow rate entering the roll gap.

The invention discloses a wide and thick steel plate for a 550MPa-grade corrosion-resistant anti-fatigue ocean tendon pipe and a production method of the wide and thick steel plate, the component design of the wide and thick steel plate enables CEIIW to be controlled to be 0.33-0.37% and CEPcm to be controlled to be 0.13-0.17%, the low-Nb and Mo-free design is adopted, the phase change temperature is increased, polygonal ferrite phase change is promoted, the tensile strength of the steel plate is improved, and the tensile strength of the steel plate is improved. The production methods of low-temperature heating, rough rolling multi-stage thickness section high-temperature gradient deformation and low-temperature rolling, intermediate temperature-waiting blank rapid cooling after rough rolling is finished, finish rolling low-temperature deformation, multi-stage water cooling and the like are combined to obtain a microstructure of granular bainite and polygonal ferrite, and the average deformation austenite height does not exceed 18 microns; the proportion, the size and the distribution of each phase are ideally controlled, and an important role is played for obtaining good comprehensive performance of the steel plate; the problem of matching of comprehensive technical characteristics such as high strength, high toughness, corrosion resistance, fatigue resistance and easy welding of the wide and thick steel plate for the ocean tendon pipe is solved.

The invention discloses a method for reducing pulverization and peeling of oxide scale on the surface of hot-rolled high-strength wheel steel, and belongs to the technical field of steel rolling. The method comprises the steps of casting blank heating, descaling after a heating furnace, rough rolling, high-pressure water descaling before finish rolling, finish rolling, cooling and coiling. In the finish rolling procedure, the finish rolling inlet temperature is smaller than or equal to 1010 DEG C, cooling water ISC between racks of F1 to F4 is opened, the water amount is 30% to 60%, the finish rolling temperature is 830 DEG C to 850 DEG C, and the finish rolling threading speed Vt is determined according to the thickness h of a finished wheel steel product: when h is smaller than or equal to 5 mm, Vt is larger than or equal to 5.5 m / s; and when h is greater than or equal to 10mm, Vt is greater than or equal to 3.1 m / s. According to the method, the eutectoid reaction of the scale on the surface of the strip steel is controlled through the hot rolling process, so that the structure of the scale is controlled, the final microstructure of the scale is a compact structure, and the problem that the scale is pulverized and peeled off is effectively solved.

The invention relates to the technical field of metallurgical engineering, and discloses a cold-rolled strip steel deviation control method and device, and the device comprises a strip steel operation state monitoring module, a side guide roller dynamic regulation and control module, a multi-parameter collaborative optimization module, a fault early warning and self-diagnosis module, and a man-machine interaction control module. According to the method, strip steel edge position data are collected in real time through a high-precision laser distance measuring sensor array, the deviation amount is calculated through a dynamic weighting algorithm, and a three-level early warning mechanism is established based on material characteristics and technological parameters; a waste roller transformation technology is innovatively adopted, a scale breaker supporting roller is transformed into a self-adaptive side guide roller through a special welding process, and the transformation cost is reduced while the control precision is guaranteed. According to the method, the occurrence rate of scratching accidents caused by contact between the edge of the strip steel and equipment is reduced, double improvement of economic benefits and technical performance is achieved, and data support is provided for process optimization and quality tracing.

The invention relates to the technical field of rolling optimization, in particular to a ring-pull can aluminum foil rolling process parameter optimization method which comprises the following steps: ring-pull can aluminum foil rolling optimization: setting rolling speed and pressure to ensure uniform thickness and smooth surface; parameters are adjusted through multiple rounds of rolling, and a joint optimization cycle is established; microwave and electromagnetic heating are introduced, rolling and heating are iteratively optimized cooperatively, an optimal parameter combination is obtained, and the problems that due to the fact that the control precision of key parameters such as temperature and pressure is limited, non-uniform distribution of the thickness of aluminum foil and reduction of the surface quality in the ring-pull can production process are directly caused are solved. According to the technical scheme, the technical problems that in the prior art, the rolling process parameters of the aluminum foil of the zip-top can are controlled in a refined mode due to collaborative iteration optimization rolling and multi-stage heating, the thickness uniformity and the surface smoothness of the aluminum foil of the zip-top can are remarkably improved, and support is provided for comprehensively improving the quality of the zip-top can product are solved.

The application discloses a kind of hot rolling mill set roll motor overload pre-determination method.The method includes: pre-setting a current sampling time;In the current sampling time of pre-setting, the roll motor current data of each rolling unit in hot rolling mill set is periodically sampled;The maximum overload rate of hot rolling mill set roll motor in current sampling time is calculated;Judge whether the maximum overload rate is less than overload rate determination threshold;Judge whether the next piece of steel computer set rolling force is less than overload rolling force determination threshold;If the maximum overload rate is greater than overload rate determination threshold and computer set rolling force is greater than overload rolling force determination threshold, then determine that hot rolling mill set roll motor will overload.The roll motor overload pre-determination method of the application can accurately predict the hot rolling mill set roll motor overload jump power in time, control the rolling rhythm of hot rolling mill set, and avoid the situation that hot rolling mill set roll motor appears jump power and stops due to the too fast rolling rhythm of hot rolling mill set.

According to the low-temperature steel plate with the excellent CTOD performance and the manufacturing method, a low-carbon chemical component system is adopted, and the grain size and precipitated phase composition of steel are controlled by adding alloy elements such as V-N, Ni, W and Zr; three-stage controlled rolling is adopted in the rolling process, the accelerated cooling and stacking slow cooling process is adopted in the rolled steel plate, the internal stress and precipitated phase distribution of the final steel plate are controlled, the yield strength of the steel plate produced through the method is larger than or equal to 550 MPa, and the CTOD value of the steel plate at the temperature of-60 DEG C is larger than 1.2 mm; meanwhile, under the 60 KJ / cm high heat input welding process, the impact absorption energy of a coarse grain area CGHZ of a welding joint at-80 DEG C is larger than or equal to 264 J, and the CTOD value at-60 DEG C is larger than 1.0 mm.

The invention discloses a wide and thick steel plate for a 600MPa-grade corrosion-resistant anti-fatigue marine tendon pipe and a production method of the wide and thick steel plate. According to the component design of the wide and thick steel plate, CEIIW is controlled to be 0.37%-0.42%, and CEPcm is controlled to be 0.14%-0.18%; the low-Nb and Mo-free design is adopted, the phase change temperature is increased, and phase change of polygonal ferrite is promoted; rE is fully utilized to exert the effects of solid solution, interface segregation and the like, grains are refined, the interface energy is reduced, and the corrosion resistance is improved; on the basis of component design, the production methods of low-temperature heating, rough rolling multi-stage thickness section high-temperature gradient deformation and low-temperature rolling, intermediate temperature-waiting blank rapid cooling after rough rolling is finished, finish rolling low-temperature deformation, multi-stage water cooling and the like are adopted to obtain a microstructure of polygonal ferrite, granular bainite and acicular ferrite; and the average deformation austenite height does not exceed 18 microns, and the proportion, the size and the distribution of each phase are ideally controlled, so that the method plays an important role in obtaining good comprehensive performance of the steel plate.

The invention relates to a production method for improving a low-carbon cold heading steel oxide scale structure, and belongs to the technical field of steel rolling production processes in the metallurgical industry. According to the technical scheme, the heating temperature of a steel billet is 1180 + / -10 DEG C, the finish rolling temperature of the steel billet is 970 + / -15 DEG C, and the wire rod spinning temperature is 920-940 DEG C; the wire rod enters a Stelmor cooling line for slow cooling after spinning, and the roller speed of the Stelmor cooling line is 0.28-0.30 m / s; the low-carbon cold forging steel comprises the following chemical components in percentage by mass: 0.15-0.27% of C, less than or equal to 0.30% of Si, 0.50-1.20% of Mn, less than or equal to 0.030% of S, less than or equal to 0.035% of P, more than or equal to 0.02% of Al and the balance of Fe and impurities. The method has the beneficial effects that by optimizing process parameters and properly controlling the roller way speed of the Stelmor cooling line, the thickness of the oxide scale of the steel wire rod is increased, the oxide scale can be conveniently removed in the subsequent mechanical husking process, and the next mechanical processing of the steel wire rod is facilitated.

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.

The invention discloses a method for avoiding deviation and strip breakage in cold continuous rolling specification changing and related equipment, and relates to the technical field of automatic control in the rolling process. On the basis of the steel grade number, an adjustment plan suitable for rolling completion of the cold tandem mill is determined according to a preset steel grade transition rule, the preset steel grade transition rule is constructed on the basis of a steel grade material corresponding to the steel grade number, and the adjustment plan comprises production parameters of the to-be-adjusted steel; determining whether the steel grade materials of the adjacent steel grades in the adjustment plan meet a preset transition requirement or not; and under the condition that the steel grade materials of the adjacent steel grades meet the preset transition requirement, cold continuous rolling is conducted on the steel on the basis of the adjustment plan.

A heat treatment strengthening method for Al-Zn-Mg-Cu aluminum alloy plate, the present invention relates to the field of heat treatment strengthening methods for aluminum alloy plate. The present invention is to solve the technical problem that the current industrial production is very time-consuming and it is difficult to ensure the hardness of the Al-Zn-Mg-Cu aluminum alloy plate after aging. Method: 1. Heat and keep the Al-Zn-Mg-Cu aluminum alloy ingot warm; 2. Rolling; 3. Solid solution; 4. Quenching; 5. Pre-stretching; 6. Aging treatment, the aging system is double-stage aging; 7. Sawing to obtain a finished plate. The heat treatment strengthening method of the present invention, due to the strengthening effect of low-temperature aging, and the time of the first-stage aging in the double-stage aging has a greater influence on the final peak hardness, so the first-stage aging time is reasonably controlled, and the internal particles can be rapidly coarsened by the second-stage aging, and the final Al-Zn-Mg-Cu aluminum alloy plate hardness can be close to the highest strength of single-stage peak aging. The present invention is used to prepare Al-Zn-Mg-Cu aluminum alloy plate.

The invention provides a production process of cold-rolled ultra-thin strip steel, and relates to the field of metal smelting. Comprising the steps that (1) a five-rack continuous rolling mill is designed and built, front four rack rollers of the five-rack continuous rolling mill are cylindrical rollers, and a fifth rack roller is designed to be a cylindrical roller with taper at the two axial ends; 2) setting working parameters of the five-rack continuous mill, wherein the working parameters comprise raw material thickness, production speed, reduction rate distribution between racks, structural parameters of rollers of each rack and emulsion parameters of each rack; wherein the emulsified liquid of the third rack of the five-rack continuous rolling mill is independently controlled to be sprayed, and the spraying pressure of the emulsified liquid is controlled to be gradually reduced in the rolling process of each coil of strip steel; (3) a transition strip steel raw material is selected and subjected to pre-rolling on a five-rack continuous rolling mill to produce transition coil strip steel, and a target coil ultra-thin strip steel is produced according to a preset cold rolling program after pre-rolling is completed; according to the production process, rolling mill vibration during high-speed production of the ultra-thin strip steel can be effectively relieved, the product quality is guaranteed, and the production cost is reduced.

The invention discloses a preparation method of a titanium-steel composite plate and the titanium-steel composite plate, and belongs to the technical field of metal composite material preparation. The preparation method of the titanium-steel composite plate comprises the following steps: (1) carrying out titanizing treatment on the surface of a pretreated steel substrate to form a titanizing layer, so as to obtain a titanized steel substrate; (2) laminating the titanized steel substrate and the pure titanium plate, pre-pressing, and sequentially carrying out double-pass composite rolling and heat treatment to obtain a titanium steel composite plate; wherein asynchronous isothermal rolling is adopted for the first pass of double-pass composite rolling, and isothermal symmetric rolling is adopted for the second pass of double-pass composite rolling. The preparation method is simple, efficient and low in cost, a uniform and compact titanium layer is formed on the surface of the steel substrate through titanizing treatment, the binding force between the pure titanium plate and the steel substrate is enhanced, and generation of harmful metal compounds is avoided. Meanwhile, the composite rolling technology combining asynchronous isothermal rolling and isothermal symmetric rolling is adopted, and the internal organization structure and performance of the titanium steel composite plate are effectively improved by regulating and controlling rolling parameters.

The invention provides an ultrahigh-strength low-temperature steel plate with excellent firework performance and a manufacturing method thereof. The steel plate comprises the following components in percentage by weight: 0.080%-0.200% of C, 0.70%-1.30% of Si, 1.60%-2.10% of Mn, less than or equal to 0.008% of P, less than or equal to 0.005% of S, 0.080%-0.230% of V, 0.0220%-0.0280% of N, 0.70%-1.05% of Cu, 1.30%-1.70% of Ni, 0.40%-0.60% of Mo, 0.020%-0.040% of Ti, 0.040%-0.060% of Als, 0.0300%-0.0360% of La and the balance of Fe. And the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of smelting, continuous casting, reheating, rolling, accelerated cooling and tempering. According to the steel plate produced by the method, the steel plate with excellent comprehensive mechanical properties and fire work performance is finally obtained, the yield strength of the steel plate after fire work is larger than or equal to 560 MPa, the tensile strength is 660-710 MPa, the percentage elongation after fracture is larger than or equal to 21.5%, and the impact absorption energy at the temperature of-80 DEG C is larger than or equal to 190 J.

The invention relates to the technical field of steel rolling, and particularly discloses a high-speed wire rod slitting rolling method which comprises the following steps: blank heating: heating a steel blank to 1050-1100 DEG C, and keeping rolling plasticity; rough rolling and intermediate rolling: rolling the steel billets into intermediate billets through 1 #-9 # rolling mills; in the step of pre-finish rolling and segmentation, two pre-rolled pieces with the diameter phi being 24 mm are obtained through segmentation rolling through a 13 #-18 # pre-finish rolling machine, a double-line segmentation system and a shared channel system are adopted in a segmentation composite high-line production line, the double-line segmentation system is formed by transforming a 2 # small rod production line into a double-segmentation composite high-line production line, and the double-segmentation composite high-line production line comprises a north line segmentation channel and a south line segmentation channel. A steel splitting device is arranged behind the 18 # pre-finishing mill; finish rolling and cooling: respectively passing the cut wire through a north line or south line finish rolling unit, then looping by a silking machine, and cooling by a scattered coil air cooling line; the production capacity and the economic benefit are improved by cutting the hole pattern and splitting the steel conveying curve guide groove, and the multi-specification requirements of the market are met.

The embodiment of the invention provides a preparation method of a titanium foil strip with high elongation and good surface microcosmic quality. The preparation method comprises the steps that a sponge titanium raw material is smelted and machined through a primary electron beam cold hearth smelting furnace; the titanium metal plate blank is coated with an anti-oxidation coating to form an anti-oxidation coating; the titanium metal plate blank coated with the anti-oxidation coating is subjected to heating, heat preservation, hot rolling and continuous annealing shot blasting acid pickling treatment; the hot-rolled titanium coil is subjected to first-rolling-process cold rolling, and continuous annealing, shot blasting and acid pickling are conducted after cold rolling; carrying out multi-rolling-process cold rolling and semi-finished product annealing by adopting a cold rolling unit and an argon protection cover type furnace; carrying out finished product rolling on the annealed master tape by adopting a cold rolling unit; performing finished product heat treatment on the titanium strip by adopting an argon shield continuous annealing furnace; and straightening the annealed titanium strip by adopting a tension straightening machine. According to the embodiment of the invention, the titanium foil strip with high elongation and good surface microcosmic quality is obtained, and the prepared titanium foil strip is excellent in forming performance and surface microcosmic quality.

The invention belongs to the technical field of preparation of nickel-based high-temperature alloy foils, and discloses a preparation method of a GH4145 alloy foil. Comprising the steps of vacuum induction melting, cast ingot forging, hot rolling, solution treatment, multi-pass four-roller cold rolling and stress relief annealing, acid pickling and edge cutting, multi-pass twenty-roller cold rolling and stress relief annealing and finished product annealing. The forging temperature of the cast ingot is 1020-1050 DEG C; the hot rolling temperature ranges from 1050 DEG C to 1085 DEG C; the solution treatment is that the temperature is kept at 1085 DEG C for 60 minutes; the cold rolling deformation is controlled below 50%; and stress relief annealing is carried out between the passes. The alloy foil obtained through the preparation method has the advantages of being low in stress, excellent in mechanical property, high in size precision, smooth and clean in surface and the like, and the use requirements in the fields of aerospace, chip preparation, nuclear reactors, new energy batteries and the like can be met.

The invention belongs to the technical field of bar production, and particularly relates to a production method of a steel bar for a heavy-load automobile half axle, and the steel bar comprises the following chemical components in percentage by mass: 0.39-0.42% of C, 0.25-0.35% of Si, 1.45-1.70% of Mn, less than or equal to 0.013% of P, less than or equal to 0.006% of S, less than or equal to 0.25% of Cr, less than or equal to 0.25% of Ni, 0.15-0.20% of Mo, 0.06-0.10% of V, less than or equal to 0.15% of Cu and the balance of Fe and inevitable impurities. The method has the advantages that high-performance, high-purity and low-cost production of the steel bar for the heavy-duty automobile half shaft is realized through green short-process production of'ecological electric furnace + LF + RH + continuous casting 'in combination with low-carbon component design and a controlled rolling and controlled cooling process. And macrostructures and non-metallic inclusions of the finished steel meet the requirements of high-end products.

The invention discloses a composite plate hot rolling speed-deformation-pressure coupling control system and method, and the method comprises the steps: building a time-space sequence prediction model through employing a long-short-term memory network based on the hot rolling data of a multi-layer composite plate, predicting the rolling speed, rolling force and deformation, and obtaining the deformation of the multi-layer composite plate according to the deviation between the prediction quality and the target quality. And carrying out feed-forward correction on the roll gap by adopting a multi-target balance optimization algorithm. On the basis of feed-forward correction, the residual error between the actual thickness value and the set outlet thickness is further considered, a roll gap feedback adjustment strategy is designed, and composite plate hot rolling speed-deformation-pressure coupling control is achieved. The composite plate hot rolling speed-deformation-pressure coupling control method is high in control precision, the defects of a traditional method are overcome, speed-deformation-rolling force dynamic coupling control is improved, and the method can be widely applied to multi-layer composite plate hot rolling.

A copper-aluminum composite foil and a preparation method therefor. The preparation method comprises the following steps: S1, smelting an aluminum ingot and then pouring same into a preheated casting nozzle, and cooling and crystallizing cast molten aluminum until it is in a semi-molten state, so as to prepare a semi-molten aluminum material; preheating a copper material; contacting the surface of the semi-molten aluminum material with the surface of the copper material, and performing continuous cast rolling to prepare a composite mother blank with a thickness of 7.0-10.0 mm; S2, machining the composite mother blank into a blank with a thickness of 0.15-1.0 mm by means of cold rolling; S3, subjecting the blank to an annealing treatment at 190-300°C under the protection of an inert gas for 10-30 h, and S4, rolling the annealed blank foil to a thickness of 0.01-0.035 mm to prepare the foil. Further disclosed is a copper-aluminum composite foil prepared by the method. The thickness of the foil prepared by the preparation method for a copper-aluminum composite foil is smaller than that in the prior art.