3041results about "Work treatment devices" patented technology

The utility model belongs to the technical field of cold rolling mills, and particularly relates to a seamless steel tube cold rolling mill which comprises an installation plate, a sliding groove is formed in the installation plate, a sliding block is installed in the sliding groove in a sliding mode, a cleaning brush is fixedly installed on the top side of the sliding block, a rack is fixed to one side of the installation plate, an L-shaped plate is installed on one side of the cleaning brush, and a servo motor is installed in the L-shaped plate. A pinion is mounted at the output end of the servo motor; the servo motor operates to drive the pinion to rotate, rotation of the pinion can be converted into linear motion along the rack, the linear motion of the pinion drives the cleaning brush to stably slide along the sliding groove through the L-shaped plate, the surface of the steel pipe can be comprehensively and efficiently cleaned along with sliding of the cleaning brush, and the product quality and the subsequent machining efficiency are improved.

The invention provides a production method of an invar alloy 4J36 hot-rolled coil, belongs to the technical field of invar alloy 4J36 hot rolling, and solves the problem that the invar alloy 4J36 hot-rolled coil needs to be efficiently produced. The plate blank is preheated and then heated after being ground, and the heated plate blank is subjected to high-pressure water descaling; and the descaled plate blank is rolled into an intermediate blank through seven-pass rough rolling, the intermediate blank is rolled into a black coil through five-pass steckel mill finish rolling, and the black coil is rolled into an invar alloy 4J36 hot-rolled black coil finished product. The method comprises the steps of slab component control, slab preheating and heating, rough rolling to obtain an intermediate slab, steekle mill rolling, coiling and the like, and surface oxidation generated in the heating process is reduced by adjusting the heating process; and through rolling of the steekle mill, dynamic recrystallization is fully carried out, the surface quality of the produced invar alloy 4J36 hot-rolled coil meets the product requirement, and the yield and the production efficiency are both remarkably improved.

This invention discloses a process for controlling the shape of A514GrQ extra-thick plates for offshore platforms. It uses 800-1000mm thick steel ingots, and after removing and cleaning the ingot risers, ensures uniform thickness of the ingot body, laying the foundation for obtaining steel plates with excellent flatness. The heating process is optimized to ensure uniform heating of the ingot head, middle, and tail, facilitating uniform deformation during rolling. Homogenized rolling is employed to reduce cooling water usage, limit the reduction per pass, and control the final rolling temperature, avoiding uneven internal stress and shape rebound in the steel plate. The final product is a 180-210mm thick steel plate with a maximum flatness ≤8mm and a lateral flatness ≤4mm within a length of 10000mm and a width of 2400mm, significantly reducing subsequent leveling tasks.

The invention relates to the technical field of advanced high-strength steel for automobiles. The invention relates to cold-rolled dual-phase steel DP780 with low cost and high surface. The cold-rolled dual-phase steel DP780 comprises the following chemical components in percentage by mass: 0.10 to 0.15 percent of C, 0.20 to 0.40 percent of Si, 1.60 to 1.80 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.004 percent of S, 0.015 to 0.035 percent of Al, 0.010 to 0.025 percent of Ti, 0.005 to 0.015 percent of Nb, less than or equal to 0.006 percent of N, less than or equal to 0.0003 percent of H and the balance of iron and inevitable trace impurities. The invention further provides a production method of the low-cost high-surface cold-rolled dual-phase steel DP780. The production method comprises the technological processes of smelting, continuous casting, casting blank reheating, rough rolling, finish rolling, cooling and coiling after rolling, hot coil acid continuous rolling and rolled hard coil continuous annealing. The 780MPa-grade cold-rolled dual-phase steel has the beneficial effects that the 780MPa-grade cold-rolled dual-phase steel which is small in alloy adding amount and easy to control steelmaking casting, hot rolling and continuous annealing can be stably obtained, and the use requirements of automobile parts are met.

The invention relates to the technical field of advanced high-strength steel for automobiles. The invention relates to cold-rolled dual-phase steel DP980 with low cost and high surface. The cold-rolled dual-phase steel DP980 comprises the following chemical components in percentage by mass: 0.07 to 0.10 percent of C, 0.30 to 0.60 percent of Si, 2.00 to 2.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.003 percent of S, 0.015 to 0.035 percent of Al, 0.010 to 0.040 percent of Nb, 0.010 to 0.040 percent of Ti, 0.10 to 0.30 percent of Cr, less than or equal to 0.006 percent of N, less than or equal to 0.0003 percent of H and the balance of iron and inevitable trace impurities. The invention provides a production method of low-cost high-surface cold-rolled dual-phase steel DP980. The production method comprises the technological processes of smelting, continuous casting, casting blank reheating, rough rolling, finish rolling, cooling and coiling after rolling, hot coil acid continuous rolling and rolled hard coil continuous annealing. The 980MPa-grade cold-rolled dual-phase steel has the beneficial effects that the 980MPa-grade cold-rolled dual-phase steel which is small in alloy adding amount and easy to control steelmaking casting, hot rolling and continuous annealing can be stably obtained, and the use requirements of automobile parts are met.

The invention discloses a brush roller device suitable for various bandwidths and a using method thereof, and belongs to the technical field of brush rollers, the brush roller device suitable for various bandwidths comprises a fixed seat and further comprises a roller frame, the roller frame is movably arranged on the fixed seat, a brush roller body is rotationally arranged on the roller frame, and the brush roller body is arranged on the fixed seat; a driving motor for driving the brush roll body to rotate is fixedly arranged on the fixed seat; the transverse moving mechanism is arranged on the fixed seat and is used for driving the roller frame to transversely move on the fixed seat; the impurity removing mechanism is arranged on the roller frame and is used for cleaning oxidized chips on the brush roller body; the brush roller body transversely moves in a reciprocating mode, oxidized scraps on the surface of a steel belt can be evenly brushed, the contact frequency of bristles and the surface of an object can be increased, abrasion of the bristles is more even, meanwhile, the brush roller body is suitable for brushing work of different belt widths, the brush roller can be automatically cleaned when the brush roller conducts brushing work, and the service life of the brush roller is prolonged. And the subsequent continuous and effective work of the brush roll is ensured.

The present invention relates to the field of aluminum cold rolling technology, and specifically to an aluminum cold rolling production device and production method for can body materials, including a stable cold rolling device for rolling aluminum alloy strips, the stable cold rolling device including a driving platform, a cold rolling roller, an outer wall cleaning mechanism, a first ball screw slide, an identification detection device and a spare replacement installation platform; two cold rolling rollers are provided and installed on the driving platform; two outer wall cleaning mechanisms are provided, and an outer wall cleaning mechanism is provided on the side of each cold rolling roller; two first ball screw slides are provided, and a first ball screw slide is installed on the working end of each outer wall cleaning mechanism; two identification detection devices are provided, and an identification detection device is installed on the active end of each first ball screw slide; the spare replacement installation platform is provided on the side of the driving platform, and spare rollers to be replaced are stored on the spare replacement installation platform. The present invention can effectively ensure the stability of production and improve productivity at the same time.

The utility model relates to the technical field of hot rolling mills, in particular to a hot rolling device for an aluminum alloy plate strip, which aims at solving the technical problem of overcoming the defects of large using amount of cooling liquid and difficulty in cleaning in the prior art, and is mainly realized through the following technical scheme: the hot rolling device for the aluminum alloy plate strip comprises a rack and a hot rolling assembly, the hot rolling assembly comprises a hot rolling frame, an upper hot roller and a lower hot roller and further comprises a cooling assembly and a cleaning assembly, the cooling assembly comprises a water cooling part and an air cooling part, the water cooling part comprises top water cooling and bottom water cooling, the cleaning assembly comprises a first cleaning part and a second cleaning part, and the first cleaning part corresponds to the upper hot roller. The second cleaning piece is arranged between the two adjacent lower hot rollers, the cooling assembly can accurately spray and cool to effectively reduce the using amount of cooling liquid, the cleaning assembly can conduct self-cleaning operation on the upper hot rollers and the lower hot rollers during hot rolling work, dirt residues are avoided, and the follow-up cleaning pressure is relieved.

The utility model discloses a metal belt cooling mechanism which comprises a supporting table, a support is jointly welded to the two sides of the upper end of the supporting table, two cleaning frames are installed on one side wall of the support in an up-down symmetrical mode, a cleaning roller is installed on each cleaning frame, flexible brush strips are installed on the outer sides of the cleaning rollers, and the flexible brush strips are connected with the supporting table. And a motor is mounted on the cleaning frame through a bolt at a position opposite to a rolling shaft of the cleaning roller. The cleaning device has the beneficial effects that on one hand, under the action of the cleaning frame, the cleaning roller, the flexible brush strip and the motor, residues on the surface of a metal belt subjected to hot rolling machining can be effectively cleaned, and the residues are prevented from being firmly adhered after the metal belt is cooled, and on the other hand, under the action of the electric telescopic rod, the air cooler, the air injection cover and the clamping roller, the cleaning effect is good. According to the metal belt cooling device, the metal belt can be clamped and corrected through the clamping rollers while air blowing cooling is conducted, so that deformation of the metal belt after cooling is effectively avoided, and the cooling quality of the metal belt is improved.

The utility model relates to the technical field of strip steel rolling, in particular to galvanized strip steel production rolling equipment. According to the technical scheme, the device comprises an air outlet pipe, a fixing frame, rollers and an air cooler, the rollers are symmetrically and rotationally installed in the positions, close to the upper surface and the lower surface, of the interior of the fixing frame, cooling cavities are formed in the two rollers, and the two ends of each roller are fixedly connected with a rotary joint A and a rotary joint B correspondingly; connecting pipes A are fixedly connected to the outer sides of the two rotating joints A, the tail ends of the two connecting pipes A are fixedly connected to the outer surface of an air outlet pipe, and an air inlet pipe is fixedly connected to the tail end of the air cooler output pipe. In the hot rolling process of the galvanized strip steel, the temperature of the roller is reduced, the service life of the roller is prolonged, heat of the roller is converted into hot air, production raw materials needing to be heated can be preheated, meanwhile, the hot air drying device can be used for drying the galvanized strip steel after follow-up cleaning operation, and energy consumption is saved.

The invention discloses a V-B-Ti microalloyed 690 MPa grade steel for engineering machinery, and belongs to the field of metal processing. The steel comprises the following chemical components in percentage by weight: 0.13%-0.17% of C, 0.15%-0.25% of Si, 1.55%-1.7% of Mn, less than or equal to 0.02% of P, less than or equal to 0.015% of S, 0.017%-0.0250% of Ti, 0.1%-0.2% of Cr, 0.015%-0.045% of Als, 0.05%-0.08% of V, 0.0015%-0.0020% of B, 0.005%-0.0095% of N, 3.4%-3.8% of Ti / N and the balance of Fe and inevitable impurities, the total amount of other impurity elements is less than 0.05%, and the problems of low steel plate toughness and plate shape unevenness are solved.

The utility model provides a uniform cooling device for hot-rolled low-carbon strip steel. The uniform cooling device comprises a laminar cooling section, an aerial fog cooling section and a water replenishing cooling section which are sequentially arranged between a finishing mill group and a coiling machine, the laminar cooling section comprises a first-stage laminar cooling mechanism, a second-stage laminar cooling mechanism and a third-stage laminar cooling mechanism which are arranged in sequence; and an infrared imager for monitoring the transverse temperature of the strip steel in real time is arranged at the upstream of each stage of laminar cooling mechanism. Each stage of laminar cooling mechanism comprises four rows of cooling headers arranged side by side, one end of each cooling header is connected with a cooling water supply pipe, the other end of each cooling header is connected with two columns of gooseneck pipes, the gooseneck pipes are evenly distributed in the width direction of the low-carbon strip steel, the adjacent columns of gooseneck pipes are arranged in a staggered mode, and each gooseneck pipe is provided with an electric valve with the adjustable opening degree.

The utility model discloses surface treatment equipment for cold rolling of an aluminum plate strip. The surface treatment equipment comprises a machine shell and a feeding mechanism. A first electric push rod and a second electric push rod are arranged in the middle of the top wall of the machine shell, the first electric push rod is located at the front end of the second electric push rod, a sweeping mechanism is arranged on the lower side of the telescopic end of the first electric push rod, and a cleaning mechanism is arranged on the lower side of the telescopic end of the second electric push rod. A scraper III is arranged in the middle of the upper side surface of the support plate; the feeding mechanism is arranged between the left wall and the right wall of the machine shell; according to the surface treatment equipment for aluminum plate strip cold rolling, the dip angle of the scraper can be adjusted according to aluminum plates of different thicknesses when cold rolling oil is scraped off from the aluminum plates, the effect of scraping off the cold rolling oil on the aluminum plates through the scraper is high, and the cold rolling oil accumulated on the front side of the scraper of the aluminum plates can be cleared away in time; and a good working environment is provided for subsequent surface treatment for cold rolling of the aluminum plate strip.

The invention belongs to the technical field of titanium alloy machining, and relates to a preparation method and application of a titanium alloy disc round wire resistant to the high temperature of 650 DEG C. The method comprises the following steps: firstly, heating a prefabricated wire blank of which the chemical components and the microstructure are designed through combination of an induction heater and a tubular heating furnace, carrying out continuous rolling by utilizing a horizontally and vertically arranged continuous rolling mill, and obtaining a ten-square-section wire blank A of which the structure and the size meet requirements through hole pattern parameter design, induction heating and heat compensation between racks and control over pass deformation and accumulated deformation; then combined heating is conducted through an induction heater and a tubular heating furnace, hot drawing is conducted through a two-connection type roller die, and a round-section wire blank B is obtained; and heating by using an induction heater and a tubular heating furnace in a combined manner, controlling the heating temperature, peeling by using a peeling die to obtain a wire material with an accurate size, and finally polishing by using an abrasive belt polishing machine to obtain the target titanium alloy disc round wire material. The target titanium alloy disc round wire can be applied to high-temperature part fasteners of hypersonic aircrafts, aero-engines or airspace engines.

The invention relates to the technical field of metal material hot working, and discloses a hot-rolled coiled plate production process which comprises the following steps: preparing a reaction type protective agent, the high-temperature-resistant coating is prepared from the following raw materials in parts by weight: 20 to 40 parts of tetraethoxysilane, 5 to 15 parts of triethyl phosphate, 1 to 5 parts of triethyl borate, 0.5 to 2.0 parts of cerous nitrate (III) hexahydrate, 0.1 to 1.0 part of lithium acetate and 0.01 to 0.05 part of vanadyl acetylacetonate (IV). Coating the surface of a hot-rolled plate blank with the protective agent; the coated plate blank is heated in a heating furnace, so that the protective agent forms a molten-state protective layer in situ; carrying out hot rolling on the plate blank with the molten protective layer; and cooling and coiling the hot-rolled steel strip. In the whole heating and hot rolling process, the molten protective layer isolates the contact between the steel and the oxidizing atmosphere, so that the generation of oxide scales is fundamentally inhibited, the production process is simplified, and the metal yield is increased.

The present invention relates to the technical field of seamless steel pipe production, and discloses a hot rolling production process for G115 seamless steel pipe, comprising the following steps: preparing a G115 steel hollow billet with a diameter smaller than that of a finished pipe; hot rolling, piercing and rolling the hollow billet to obtain a rough pipe; sizing the rough pipe to obtain a rough pipe; heat treating the rough pipe to form a semi-finished pipe; grinding and machining the semi-finished pipe to obtain a finished pipe. By adopting a production process of hollow billets with a diameter smaller than that of finished pipes + hot rolling, the production batch is flexible, the specification applicability is strong, and it is suitable for industrialized production of factories with complex specifications, the production efficiency and yield rate are significantly improved, the product surface quality is good, the metallographic structure and the longitudinal and transverse mechanical properties are uniform, the process is controllable, the quality is stable, the yield rate is high, and the economic benefits are significant.

The invention is suitable for the technical field of metallurgical processes, and provides a continuous casting, continuous rolling and continuous straightening method for a steel rail. Comprising the following steps that a continuous casting billet is produced through a continuous casting machine; performing scanning, typical defect judgment and alarm on the surface of the continuous casting blank through a 2D surface defect detection system so as to obtain the position of a defect on the surface of the casting blank; carrying out follow-up targeted cleaning according to the surface defect position of the continuous casting billet; the continuous casting billet is subjected to induction supplementary heat treatment; the continuous casting billet is subjected to descaling treatment through high-pressure water; rolling the continuous casting billet by using a rolling mill to obtain an initial steel rail; marking the initial steel rail; waste heat quenching treatment is conducted on the initial steel rail, and deformation limiting is conducted on the rail bottom / rail head of the steel rail; straightening the initial steel rail by using a straightening machine; the initial steel rail is subjected to rough fixed-length cutting treatment of any length; the cut initial steel rail is subjected to quality detection; and performing fixed-length cutting treatment on the initial steel rail subjected to quality detection to obtain a finished steel rail.

The invention belongs to the technical field of titanium-steel composite plates, and particularly relates to a production process for preventing grain growth of a titanium-steel composite plate, which comprises the following steps: roughening the lower side surface of a titanium plate and the upper side surface of a steel plate by adopting a sand blasting process; an additive is sprayed to the upper side face of the steel plate and the lower side face of the titanium plate, the additive comprises boron powder and a binding agent, graphite foil is laid on the upper side face of the steel plate sprayed with the additive, the titanium plate sprayed with the additive is stacked on the steel plate, and the graphite foil is clamped by the upper side face of the steel plate and the lower side face of the titanium plate to prepare a composite plate blank; sealing the edge part of the composite plate blank by using a sealing material; the production process comprises the following steps: heating a composite plate blank through a heating furnace, rolling and cooling the heated composite plate blank, straightening the composite plate blank through a straightening machine, and trimming the straightened composite plate blank to obtain the titanium-steel composite plate. And the bonding strength and the shearing strength of the titanium steel composite plate are improved.

The invention discloses a high-impact-toughness Ti80 titanium alloy plate with the thickness larger than or equal to 50 mm and a preparation method. The preparation method comprises the steps that S1, a Ti80 plate blank with the thickness ranging from 200 mm to 500 mm is selected; (S2) plate blank rolling is conducted, specifically, after the plate blank is heated, the plate blank is subjected to 1-2 heating number rolling, a plate with the thickness ranging from 50 mm to 180 mm is obtained, the total rolling deformation ranges from 60% to 90%, and the finish rolling temperature is larger than or equal to T beta-250 DEG C, and (S3) plate straightening is conducted. According to the method, surface micro-hardening of the thick normalized intermediate-state plate blank is achieved through intermittent cooling, meanwhile, by controlling the rolling deformation amount and distribution of the deformation amount, deformation can permeate into the softened core portion more capacity, the core portion structure is refined, and the toughness of the core portion is improved; the problems that the surface and the core of the Ti80 titanium alloy thick plate (the thickness is larger than or equal to 50 mm) are inconsistent in structure, and the impact toughness of the core is insufficient are solved, and the prepared Ti80 titanium alloy thick plate can meet the requirement of ocean engineering equipment for thick plates.

The invention relates to the technical field of low-carbon microalloyed steel production, in particular to economical thin L450M pipeline steel and a method for controlling a banded structure, the steel comprises the following chemical components in percentage by weight: 0.07%-0.09% of C, 0.10%-0.25% of Si, 1.70%-1.80% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.01%-0.02% of Nb, 0.008%-0.015% of Ti, 0.015%-0.04% of Al, 0.05%-0.15% of Cr, 0.003%-0.006% of N and the balance of Fe and inevitable impurities, and the total amount of impurity elements is less than 0.05%; the steel plate produced by the invention has the advantages of low cost, high strength and toughness, low yield ratio and high straightness, and can ensure the service safety of the gas transmission pipeline.

The utility model discloses a production device of a layered silver-based metal oxide contact material, which comprises a discharging mechanism, an atmosphere protection resistance furnace, a rolling mill, an atmosphere protection cooling device, a limiting device and a winding machine, and the atmosphere protection resistance furnace is divided into a resistance furnace middle section, a resistance furnace front section and a resistance furnace rear section. The resistance furnace middle section is connected with an external non-reducing and non-combustible gas conveying device, the resistance furnace front section and the resistance furnace rear section are both connected with the external non-reducing and non-combustible gas conveying device, and the atmosphere protection cooling device is divided into a cooling device middle section, a cooling device front section and a cooling device rear section. The cooling device middle section is connected with an external non-reducing combustible gas conveying device, and the cooling device front section and the cooling device rear section are both connected with the external non-reducing combustible gas conveying device. The layered silver-based metal oxide contact material which is firm in composite interface bonding, low in cost and stable and reliable in quality can be prepared.

The present invention provides a soluble cold rolling oil composition in which oil particles of approximately 0.1 μm or less are dispersed in water, and which has rolling properties (particularly anti-seizure properties) equal to or better than those of water-insoluble rolling oils and emulsion-type rolling oils, while enabling the gloss of products to be made uniform and enabling an improvement in unit consumption compared to emulsion-type rolling oils; and a cold rolling method using the composition. [Solution] A cold rolling oil composition containing (A) a base oil, (B) a specific fatty acid, (C) a specific sulfur-based extreme pressure agent, (D) a specific water-soluble polymer, and (E) a specific amine, and a cold rolling method using the same.

The invention relates to a control method for improving automobile beam steel coiling temperature setting precision, and belongs to the technical field of hot continuous rolling plate production methods. According to the technical scheme, strip steel parameters under different cooling processes are independently set, a CTC model selects a corresponding model parameter table according to laminar cooling codes, the same steel type is controlled by applying the independent model table when the cooling processes are different, and mutual interference of model setting and self-learning is avoided. The method has the beneficial effects that the effect is remarkable, the problem of large strip steel coiling temperature control deviation caused by different cooling processes is solved, and the occurrence of product degradation quality accidents caused by the transformation of the girder steel cooling process is avoided.

The utility model aims at disclosing an oil removal device of a copper strip roughing mill, which relates to the technical field of copper strip processing and comprises a pair of rolling rollers and a copper strip thickness detector, the copper strip thickness detector is movably arranged on one side of the copper strip, a row of multiple air outlets are formed in the copper strip thickness detector, the air outlets blow air to the copper strip in the inclined direction, and the air outlets face the side where the rolling rollers are located. The copper strip thickness detector has the technical effects that the copper strip thickness detector is movably arranged on one side of the copper strip, the copper strip thickness detector is provided with a plurality of air outlets in a row, and enough distances are reserved between the air outlets and rolling rollers, so that the copper strip cannot touch the air outlets in a strip threading process, and the air outlets are prevented from being damaged; when the thickness of the copper strip needs to be measured, the detection head of the copper strip thickness detector is moved to the position above the copper strip and conducts online measurement, meanwhile, the air outlets in one row can blow air to the copper strip, and the air blowing aims at preventing rolling oil from overflowing along the copper strip.

The utility model discloses a flattening device for cold-rolled strip steel processing, and relates to the field of cold-rolled strip steel processing equipment. The device comprises a device body, a lower pressing roller is arranged on the lower portion of the interior of the device body, a liquid feeding mechanism is arranged on one side of the lower pressing roller, and the liquid feeding mechanism comprises a motor. At the moment, a liquid pump in the liquid bin can be started through an external controller, the leveling liquid is guided into the liquid storage pool, then a motor is started, the motor drives a first gear and a second gear to rotate, then the first gear and the second gear drive an upper sucking roller and a lower sucking roller to rotate, and the leveling liquid is sucked into the liquid storage pool. And in the rolling process of the lower sucking roller, the leveling liquid can be effectively wrapped on the lower sucking roller, so that the liquid can be conveniently fed on the ground of the cold-rolled strip steel.

The invention discloses a steel rolling production line water circulation efficient cooling system which comprises a slag discharge channel and a filter tank, a filter mechanism is arranged in the filter tank, the slag discharge channel is communicated with the inlet end of the filter mechanism through a first communicating pipe, and a slag collecting tank is arranged below the outlet end of the filter mechanism. The bottom of the filter tank is connected with an oil-water separation tank through a second communicating pipe, an oil removal mechanism is arranged in the oil-water separation tank, an oil discharge port is formed in the upper part of the oil-water separation tank, the bottom of the oil-water separation tank is connected with a cooling tank through a third communicating pipe, and an air refrigerator is arranged above the cooling tank; an air cooling assembly communicated with the air refrigerator is arranged in the cooling pool, the upper portion of the cooling pool is connected with an adsorption tank through a fourth communicating pipe, and the adsorption tank is connected with a recovery tank through a fifth communicating pipe. The device not only can improve the impurity and oil removal effect of the turbid circulating water, but also can obviously improve the cooling speed of the turbid circulating water, and has the advantages of reasonable structural design and good environmental protection effect.

A manufacturing method for a non-oriented silicon steel sheet, comprising the working procedures of slab continuous casting, slab heating, intermediate slab manufacturing, surface treatment, slab assembly, heating, hot rolling, no normalizing, acid pickling, cold rolling, annealing, coating and the like, and further comprising a coiling procedure before or after the cold rolling procedure. In the surface treatment procedure, the intermediate slab enters a tunnel furnace to be subjected to high-temperature reduction heat treatment in a reducing atmosphere of 90％H2+10％H2S, the temperature is maintained at 950-1000℃, and the temperature is maintained for15-30 min; and a single-layer non-oriented silicon steel finished product having a thickness of 0.15-0.30 mm is manufactured without normalizing.

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 V-N-B microalloyed 550MPa-grade steel for engineering machinery and a preparation method of the V-N-B microalloyed 550MPa-grade steel, and belongs to the technical field of low-carbon microalloyed steel production. The steel comprises the following components in percentage by weight: 0.06%-0.15% of C, 0.2%-0.35% of Si, 1.35%-1.65% of Mn, less than or equal to 0.02% of P, less than or equal to 0.015% of S, 0.01%-0.03% of Nb, 0.015%-0.0250% of Ti, 0.15%-0.25% of Cr, 0.015%-0.045% of Als, 0.05%-0.08% of V, 0.0012%-0.0020% of B, 0.01%-0.025% of N, 0.005%-0.010% of Ca and the balance of Fe and inevitable impurities, the total amount of other impurity elements is less than 0.05%, and the problems of low toughness and plate shape unevenness are solved.

The invention belongs to the technical field of composite plate manufacturing, and particularly relates to a ferritic stainless steel and carbon steel asymmetric composite blank and a manufacturing method thereof. The manufacturing method of the ferritic stainless steel and carbon steel asymmetric composite blank comprises the following working procedures of blank assembly raw material preparation, stainless steel middle plate pretreatment, blank assembly raw material surface treatment, cleaning, blank assembly and vacuum chamber electron beam seal welding. The process is simple, the cost is low, the blank manufacturing efficiency is improved, the method is suitable for mass production of products, and the ferrite stainless steel and carbon steel asymmetric composite blank with excellent quality can be obtained.