127 results about "Strip casting" patented technology

The invention belongs to the technical field of non-oriented electrical steel manufacturing, and relates to a method for producing non-oriented silicon steel based on thin-strip cast rolling. The low-silicon and aluminum-free component design is adopted, the hot-rolled thin substrate is directly obtained through thin strip cast rolling, casting blank continuous casting and casting blank heating are omitted, the hot rolling reduction is greatly reduced, it is avoided that unfavorable textures of alpha and gamma components in the finished non-oriented silicon steel are remarkably improved, and the high magnetic induction of the finished product is guaranteed; after acid pickling and cold rolling, grain growth is promoted by means of high-temperature cover annealing, and low iron loss of a finished product is guaranteed; the high-magnetic-induction low-iron-loss non-oriented silicon steel with the thickness specification of 0.50 mm is obtained, the grain size of a finished product is 80-100 microns, the iron loss P1.5 / 50 is smaller than or equal to 4.0 W / kg, and the magnetic induction B5000 is larger than or equal to 1.76 T.

The invention relates to the technical field of thin-strip cast rolling, and provides a thin-strip cast rolling tundish continuous casting device and method.The thin-strip cast rolling tundish continuous casting device comprises a base frame horizontally installed on the surface of a foundation, and the base frame is provided with a flow distribution ladle, a tundish and a large ladle from bottom to top; an adjusting mechanism is arranged below the position, where the casting position is arranged, of the base frame, the adjusting mechanism comprises two limiting plates which are symmetrically arranged, and one side of the middle of each limiting plate is fixedly connected with a second motor for driving a crystallizer roller; and a baking oven fixed on the placing rack is arranged above the middle parts of the two motors II. According to the method, molten steel qualified in smelting is directly poured into the molten pool defined by the two crystallization rollers rotating oppositely and the side sealing plates through the large ladle, the tundish and the flow distribution system, the molten steel is cooled through the two crystallization rollers rotating oppositely to form the steel belt with the thickness of 1-5 mm, the production cost can be saved, the casting continuity is improved, the production efficiency is improved, and the yield is increased.

The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking, and belongs to the technical field of refractory materials. The invention discloses an environment-friendly tundish magnesium-calcium dry material for thin-strip cast-rolling short-process steelmaking. The tundish magnesium-calcium dry material is prepared from the following raw materials in percentage by mass: 44-62.5% of magnesia aggregate, 22.5-24% of dolomite aggregate, 11-28% of magnesia fine powder and 3-5% of a binding agent, the binding agent is silica sol modified by a phosphate esterification aluminic acid ester coupling agent. The preparation method comprises the following specific steps: putting magnesia fine powder, a binding agent, magnesia aggregate and dolomite aggregate into a V-shaped mixing mill, uniformly stirring for 5 minutes, putting the stirred mixture into a mold, ramming, vibrating and molding to obtain a molded green body, curing at room temperature for 24 hours, demolding, drying at 200 DEG C for 24 hours, and carrying out heat treatment in an air atmosphere to obtain a dry material sample. According to the invention, the binding agent with good compatibility with a matrix is prepared by improving the binding agent, so that the binding agent can play a reinforcing role.

The invention belongs to the technical field of steel production, and relates to a method for producing a low-cost high-strength galvanized sheet based on thin-strip cast rolling. After molten steel is subjected to thin-strip continuous casting to obtain a casting strip, the casting strip is rolled into a thin strip in a single pass mode, the thin strip is coiled after being cooled through aerial fog, then hot-dip galvanizing is conducted on a continuous hot-dip galvanizing production line after acid pickling is conducted, the annealing temperature of a galvanizing section is 640-720 DEG C, and then the thin strip is placed at the room temperature for more than 35 days after leveling is conducted. According to the method, supersaturated solid solution of C and N atoms in the thin strip casting and rolling sub-rapid solidification process is fully utilized, the high solid solution state is maintained by combining hot rolling and galvanizing section short-time and low-temperature design, finally, strength jump is driven by means of natural aging after production, and the high-strength galvanized plate with good stamping performance is obtained under a simple C-Si-Mn component system. The problems that the high-strength galvanized plate forming capacity of a traditional high-carbon route is insufficient, and the alloy cost of a low-carbon microalloy route is high are solved, and meanwhile carbon emission in the product production process is greatly reduced.

The invention belongs to the field of thin-strip continuous casting, and relates to a method for reducing the occurrence rate of edge cracks of double-roller continuous casting hot-rolled strip steel. The method comprises the steps of optimizing the angle of a flow guide hole in the end of a molten pool flow distribution water opening, increasing the flow speed of molten steel in the flow guide hole, and solving the problem that temperature distribution in the width direction of molten steel in the molten pool is remarkably uneven, especially the problem that the temperature of molten steel near a side sealing plate in the molten pool is low. According to the method disclosed by the invention, by adopting the control means, the occurrence rate of edge cracks of the hot-rolled strip steel can be effectively reduced when the strip steel is produced by adopting a double-roller cast-rolling process. According to the method, under the condition that the production cost is not increased, the surface quality of the strip steel produced through the double-roller thin-strip cast-rolling technology is effectively improved, and the edge cracks of the strip steel account for more than 50% of the plate surface cracks and are reduced to less than 10% of the plate surface cracks.

The invention belongs to the technical field of non-oriented electrical steel manufacturing, and relates to a method for producing high-magnetic-induction low-iron-loss non-oriented silicon steel based on thin-strip cast rolling. The low-silicon aluminum-free component design is adopted, the hot-rolled thin substrate with the thickness of 1.60 + / -0.10 mm is directly obtained through thin strip cast rolling, the rolling reduction of hot rolling and cold rolling is greatly reduced, the situation that due to hot rolling and cold rolling with the large compression ratio, alpha and gamma components in a non-oriented silicon steel texture are remarkably improved is avoided, and the magnetic induction of a finished product is improved. The non-oriented silicon steel with the thickness specification of 0.20-0.35 mm is obtained by combining with accurate control of the hot rolling-cold rolling-annealing process, the non-oriented silicon steel has low iron loss and high magnetic induction, the iron loss P1.5 / 50 is 3.3-4.5 W / kg, and the magnetic induction B5000 is 1.78-1.81 T. The double-roller thin-strip continuous casting method is adopted, compared with a conventional process, the processes of hot rolling heating, hot rolling rough rolling, normalizing and the like are omitted, and the double-roller thin-strip continuous casting method is an energy-saving and environment-friendly short-process production technology.

The invention relates to a cerium-iron-boron permanent magnet material with low content of a non-magnetic phase CeFe2 and a preparation method of the cerium-iron-boron permanent magnet material. The cerium-iron-boron permanent magnet material is composed of the following components in percentage by atom: 11%-17% of Ce, 70%-80% of Fe, 5%-10% of B, 0.1%-3% of Co, 0.1%-3% of Zr and 0.1%-5% of La. The preparation method comprises the following steps of S1, smelting, wherein Ce, La, Fe, Co, Zr and FeB are prepared into a CeLaFeCoZrB alloy cast ingot through electric arc smelting according to the atomic percent composition; s2, melt-spinning: crushing the CeLaFeCoZrB alloy ingot prepared in the S1, and then preparing an alloy strip by using a melt rapid quenching method; and S3, magnetic field annealing: performing vacuum annealing on the alloy strip prepared in S2, wherein the annealing temperature is 2-12K below the Curie temperature Tc of the alloy. Compared with the prior art, the method has the advantages that the phase volume fraction of the non-magnetic CeFe2 phase in the cerium-iron-boron permanent magnet material alloy is remarkably reduced, and the residual magnetism and the maximum magnetic energy product of the alloy are improved.

The invention relates to the technical field of casting machining, in particular to a long-strip-shaped casting machining device which comprises a base, a driving device, a support and fixing units, and each fixing unit comprises a positioning column, a positioning block, a cushion block, a pressing block and a locking device used for fixing the pressing block; grooves are formed in the two ends of the bottom of the positioning block, and a boss is arranged in the middle of the cushion block. When the long-strip-shaped castings are fixed, the positioning block is matched with the positioning column, the grooves in the two ends of the positioning block abut against the outer walls of connecting holes in the middles of the long-strip-shaped castings respectively, the bosses abut against weight reduction grooves of the long-strip-shaped castings, and the two ends of the pressing block abut against the cambered surfaces of the two long-strip-shaped castings respectively. By means of one-time clamping, machining of the A face, the edges and the connecting holes not perpendicular to the A face of the long-strip-shaped casting can be achieved, machining of four working procedures of the casting is completed, only two times of clamping are needed, and the production efficiency is greatly improved.

The invention belongs to the field of thin-strip continuous casting, and relates to a method for reducing transition ladle overflow in the thin-strip high-carbon steel continuous casting process. In the chemical components of the molten steel, C is not less than 0.48%, Al is not more than 0.0020%, and Ca is not less than 0.0020%; the free oxygen content of the primary smelting molten steel before VD vacuum treatment is greater than or equal to 600ppm, and the Al content after VD vacuum treatment is less than or equal to 0.0020%; after the refined molten steel is subjected to LF refining treatment, Ca is greater than or equal to 0.0015%, the free oxygen content is greater than or equal to 60ppm, and Al is less than or equal to 0.0020 The alkalinity R of LF refining final slag is 2.0-2.5, and the content of Al2O3 is smaller than or equal to 3%; in the chemical components of the tundish molten steel, C is not less than 0.48%, Al is not more than 0.0020%, Ca is not less than 0.0010%, and the content of free oxygen is not less than 40ppm; the temperature of a tundish is 1620 + / -10 DEG C; the weight of the transition bag is 100-550 kg; and the pulling speed is 20-55m / min. By optimizing the steelmaking process, adjusting the refining slag system, adjusting the chemical components of the molten steel, adjusting the temperature of the tundish and controlling the tundish operation and the pulling speed when the weight of the transition ladle is increased, the overflow occurrence rate of the transition ladle is effectively reduced when the high-carbon steel is produced by adopting the double-roller thin-strip cast-rolling technology.

The invention relates to the technical field of thin-strip continuous casting, in particular to an intelligent stainless steel production method combining RKEF smelting and a double-roller thin-strip cast rolling technology.According to the method, the RKEF technology is directly coupled with the stainless steel refining and thin-strip continuous casting technology, firstly, based on target product requirements, an intelligent batching model is adopted for calculating furnace charge of an RKEF furnace; then, based on RKEF molten nickel iron components, an intelligent batching model is adopted to conduct collaborative optimization calculation on added ingredients of the AOD furnace (a dynamic blowing control model is adopted to conduct real-time optimization on the proportion and flow of mixed gas of O2, Ar and N2), and cost optimal dynamic batching under multiple constraints is achieved; then, a neural network algorithm GAN with physical constraint PI is used for predicting components and temperature, predicted values of the components and the temperature and control instructions are output, the metallurgical physical law is used as hard constraint to be embedded into model training, a control decision is made to fit data and conform to scientific rules, process control is conducted accurately, the whole process is more energy-saving, and the method is suitable for large-scale popularization and application. And carbon dioxide emission is reduced.

The present application relates to thin strip continuous casting production technical field, specifically to a kind of automatically controlled double-roller thin strip continuous casting production process in molten pool height method, comprising: laser ranging module and visual perception module are arranged;Embedded processing module processing;Using deep learning algorithm establishes molten pool height dynamic prediction model, outputs molten pool height prediction value;Using adaptive sliding mode control as main controller, the displacement of servo hydraulic stopper is output;Based on the displacement of servo hydraulic stopper, molten pool height control is carried out.The method utilizes laser to provide accurate distance reference, visual sensing provides molten pool liquid level information, improves detection accuracy and reduces environmental interference through machine vision algorithm;And based on process parameters and real-time information of sensor, molten pool height prediction model is constructed using neural network algorithm with physical constraint;Join reinforcement learning optimizer to adjust sliding mode control parameters online, so that it adapts to working condition change to carry out high-precision, fast-response molten pool height control.

The invention belongs to the technical field of thin-strip casting and rolling, and relates to a method for producing non-oriented silicon steel for a compressor based on thin-strip casting and rolling, and the non-oriented silicon steel produced by adopting the method. The method comprises the following steps: carrying out steelmaking according to 0.95-1.05% of Si and 0.20-0.30% of Mn without adding Al, P, Sn and Sb; continuous casting is conducted through a double-roller casting and rolling technology, and a cast strip with the thickness being 1.80 mm is obtained; the casting strip is subjected to hot rolling, acid pickling and small-reduction-rate cold rolling and then directly subjected to splitting, blanking and stacking, and the stator and rotor iron core for the compressor is obtained; the iron core is subjected to heat preservation for 150 min at the temperature of 925 DEG C, so that a silicon steel base body of the stator and rotor iron core and metal in a blanking deformation area are completely recrystallized, and the grain size is 80-100 microns. Compared with a conventional process, the process of hot rolling heating, normalizing, steel plate annealing before iron core stamping, coating and the like is omitted, the rolling reduction of hot rolling and cold rolling is greatly reduced, and the non-oriented silicon steel with excellent performance and the corresponding iron core product for the compressor are produced in a short-process mode.

The present application relates to the technical field of stainless steel thin strip continuous casting, and provides a method for improving the solidification stability of thin strip continuous casting stainless steel, which comprises the following steps: obtaining an initial parameter set of the thin strip; obtaining an initial process parameter set; performing thin strip continuous casting in combination with the obtained process parameter set; measuring the molten pool liquid level, the casting and rolling force, the casting roll surface temperature and the casting strip surface temperature in real time during the thin strip continuous casting process; judging according to a judgment condition; if adjustment is needed, obtaining an adjusted process parameter set and returning; otherwise, proceeding to the next step; completing the thin strip continuous casting to obtain a thin strip product. In the present application, the molten pool liquid level, the casting and rolling force, the casting roll surface temperature and the casting strip surface temperature during the thin strip continuous casting process are measured in real time and judged according to corresponding judgment conditions, and through the establishment of real-time collaborative control of "liquid level-heat transfer-casting and rolling force-roll gap", the surface quality and the microstructure uniformity are improved while ensuring the continuous and stable production of stainless steel casting strip with a thickness of ≤2 mm.

The invention relates to an ultrathin lead-acid battery pole plate and a production method thereof. The production method is characterized by comprising the process steps of casting a lead belt, calendering, preparing lead paste and coating a plate. The polar plate assembly formed by the battery polar plates processed by the method is compact in structure, the performance of a finished product is superior to that of a polar plate produced by a gravity casting method, the whole process of casting a lead belt does not need to be watched by workers on the spot, the subsequent calendaring and pasting processes are carried out at room temperature, and lead smoke and lead slag which can be inhaled by a human body are not generated; meanwhile, the automation degree is high, the energy consumption is low, the labor intensity of workers is small, waste materials can be rapidly recycled, material waste is reduced, the production efficiency of the battery pole plate can be remarkably improved, then the production efficiency of the battery is improved, and the produced battery can meet the use requirements of small size and high capacity density at the same time; the popularization and application values are realized.

A plate strip casting blank rolling blank defect online detection method comprises the steps that a rolling blank surface image detection device is installed in an outlet area of a reversible rolling mill or a roughing mill, rolling blank surface images of different thicknesses are collected online, and the positions and sizes of defects generated on the rolling blank surface of each pass are recognized and analyzed through an image mode; and judging whether the area where each defect source is generated is in the rolling area or the smelting area, and gradually restoring the distribution and size of the defects in the original strip casting blank according to the images of the connected rolling passes in sequence for the defects in the smelting area.

The present application relates to a method for preventing leakage of a post-cast strip of a basement floor, and relates to the technical field of basement water leakage protection, which includes the following steps: a post-cast strip position determination step; a floor casting step: casting the foundation floor in the basement, leaving a gap according to the location of the post-cast strip determined in advance; an underground excavation step before casting the post-cast strip: excavating a sunken groove below the gap left by the post-cast strip; a drainage ditch excavation step: excavating a drainage ditch on the ground directly below the gap of the reserved post-cast strip, laying a drainage pipe in the drainage ditch, opening a water inlet on the upper pipe wall of the drainage pipe, and connecting the drainage pipe with the sewer; a drainage and diversion step: setting a water diversion pipe between the sunken groove and the drainage pipe; a water collection construction step in the sunken groove: installing a water collection device in the sunken groove; and a post-cast strip casting step. The present application has the effect of improving the leakage problem at the post-cast strip of the basement floor.

The application provides a roll gap control method of a double-roller thin strip process and a double-roller thin strip casting device. In the preparation process, relative movement between two rollers is controlled, or relative movement between the two rollers and control of the roll system in the form of overall movement are controlled to move on the double-roller thin strip casting machine, so that the roll gap only produces floating which can play a role in stabilizing the process and / or improving the quality of the blank. Compared with the traditional roll gap two-way floating method, the technical solution of the application does not cause two-way fluctuation of the roll body clamping force, and does not produce fluctuation of the thickness of the blank. The shear thinning behavior of the semi-solid material can be inhibited, so that the peak pressure of the molten pool is weakened, which is beneficial to real-time control, can prevent various process stability problems such as liquid leakage of the side sealing plate, damage of the side sealing plate, strip jamming and strip breaking, and can also prevent various blank quality problems such as cracks and wrinkles.

The invention provides a method for eliminating the color difference defect on the surface of hot-rolled low-carbon thin strip steel with high efficiency and low cost. According to the method, the chemical components and the strip casting temperature of the hot-rolled low-carbon thin strip steel and the introduction amount of N2 protective atmosphere in the first hot box, the second hot box and the third hot box are optimized, meanwhile, the air flow of the upper surface and the lower surface in the third hot box is controlled, the low oxidation environment is kept, it is guaranteed that rolling lubrication of the hot-rolled low-carbon thin strip steel is guaranteed, and thin oxide skin is generated before rolling; and then the layer cooling outlet temperature and the coiling temperature are controlled, and the uniformity of the strip steel transverse cooling outlet temperature and the coiling temperature is guaranteed. By applying the method, the thickness and the structure of the hot-rolled low-carbon thin strip steel oxide skin can be uniform and consistent, and the defect of color difference on the surface of the thin-strip cast-rolled low-carbon thin strip steel is efficiently eliminated at low cost.

The invention belongs to the technical field of stainless steel production, and particularly relates to a stainless steel double-roller ultrathin strip cast rolling and on-line solid solution integrated arrangement structure which is sequentially provided with a double-roller cast rolling machine, a hot box, a single-rack four-roller irreversible rolling mill, an on-line solid solution device, an ultrafast cooling device, a flying shear and a coiling machine in the direction of a solid solution stainless steel strip production line. Compared with the prior art, the cast rolling and online solid solution integrated arrangement structure for the stainless steel double-roller ultrathin strip has the advantages that on one hand, waste heat generated after cast rolling is fully utilized, and secondary heating before solid solution is omitted; on the other hand, the process chain is shortened, and the energy consumption of intermediate carrying and storage is reduced; and finally, waste heat can be efficiently recycled, and the waste heat after casting and rolling is used for solution treatment, so that carbon emission is reduced.

The invention belongs to the technical field of synthetic fiber modification, and discloses a polyester fiber suitable for non-aqueous medium dyeing and a preparation method thereof.The preparation method comprises the steps that firstly, terephthalic acid and ethylene glycol serve as raw materials, a composite bimetallic catalyst and an esterification accelerant containing siloxane groups are added, and pulping is conducted to form slurry; continuously feeding the slurry into an esterification reaction kettle for esterification reaction, and performing condensation polymerization on an esterification product to obtain a polyester melt; finally, sequentially carrying out strip casting, pelletizing and solid-phase tackifying on the polyester melt to obtain high-viscosity polyester chips, and carrying out melt spinning to obtain the polyester fiber suitable for non-aqueous medium dyeing. When the esterification product is sent out, the esterification product accounting for 40-60% of the effective volume always exists in the esterification reaction kettle; the content of oligomer in the product is lower than 0.6 wt%, and the proportion of cyclic trimer in the oligomer exceeds 60%. The method provided by the invention effectively solves the problems of color spots and uneven dyeing caused by oligomer precipitation; the prepared product is excellent in dyeing performance.

The invention relates to a strip casting machine for casting a metallic strip from a molten metal with circumferential caterpillar tracks for forming a cooling section for actively cooling the molten metal, wherein at least two circumferential caterpillar tracks are arranged one behind the other, which can be individually activated or deactivated to vary the length of the cooling section.

The invention relates to a system for producing a continuously cast material strip conveyed along a conveying path in the conveying direction, having a continuously operating strip casting machine for primarily shaping the material strip, wherein a manipulation device for manipulating the strip speed is provided downstream of the strip casting machine, the manipulation device being used to supply a strip reserve between the strip casting machine and the manipulation device and / or a strip counterpressure at the strip casting machine.

The invention belongs to the field of steel production, and relates to a method for producing 500MPa-grade Sb-containing weathering steel based on thin-strip cast rolling. The production method comprises the following steps: (1) smelting molten steel with the chemical component of Clt; 0.03% of Si, 0.30%-0.80% of Mn < lt >; the alloy comprises the following components in percentage by weight: 1.0% of Ni, 0.05%-0.20% of Sb, 0.03%-1.50% of P, less than or equal to 0.008% of S, less than or equal to 0.008% of N, 0.40%-1.40% of Cu, 0.50%-1.40% of Cr and 0.10%, 0.05 to 0.20% of Nb, and the balance being Fe; (2) thin-strip continuous casting is conducted, specifically, molten steel which is smelted to be qualified is subjected to continuous casting through a pair of copper casting rollers rotating oppositely to form a casting strip; (3) carrying out one-pass hot rolling on the cast strip to obtain thin strip steel, wherein the temperature of the strip steel after rolling is 850-1000 DEG C; and (4) cooling and coiling the hot-rolled strip steel to 450-600 DEG C through aerial fog, and coiling the hot-rolled strip steel into a coil. And uniform and fine ferrite and a small amount of pearlite structures are obtained. The thin-strip continuous casting 500MPa-grade Sb-containing weathering steel has the characteristics of short production process, low production cost, good strip steel plate shape, easiness in welding and corrosion resistance.

The invention provides a method for eliminating a thick beta-Mg17Al12 phase of an as-cast AZ91D magnesium alloy, which comprises the following steps of: performing complete annealing treatment on the as-cast AZ91D magnesium alloy according to an annealing system that the as-cast AZ91D magnesium alloy is heated to 400 DEG C, air-cooled after heat preservation for 3 hours, and subjected to electric pulse treatment after the annealing treatment is completed, clamping the strip-shaped as-cast AZ91D magnesium alloy on a copper electrode of a high-power pulse power supply, and performing electric pulse treatment, the pulse width intermediate value of the selected pulse power supply is 50 [mu] m, the frequency is 500 Hz, the output voltage value is 200-400 V, and the pulse action time is 10 min. According to the method, electric pulse treatment is utilized, compared with traditional homogenizing annealing treatment, the electric pulse technology is more efficient, more environmentally friendly and more energy-saving, the tissue structure of the magnesium alloy can be effectively improved through electric pulse treatment, the beta-Mg17Al12 phase is refined, and the tissue uniformity is improved.

The invention discloses a preparation method of a tundish permanent layer refractory material for thin-strip cast-rolling short-process steelmaking, and belongs to the technical field of refractory materials. The preparation method comprises the following steps: S1, preparing ZrO2 / carbon coated fibers; s2, dopamine hydrochloride is dissolved in a Tris-HCl buffer solution with the Ph being 8.5, stirring is conducted, then the ZrO2 / carbon-coated fiber is added, soaking, washing and drying are conducted at the room temperature, and PDA / ZrO2 / carbon-coated fiber is obtained; s3, amino-terminated polyborosiloxane is dissolved in absolute ethyl alcohol, the PDA / ZrO2 / carbon coated fiber is soaked in the absolute ethyl alcohol, washing and drying are performed, and composite fiber is obtained; and S4, putting pleonaste, nano aluminum oxide, electrofused chromic oxide, boron carbide, white dextrin and absolute ethyl alcohol into a ball mill for ball milling, uniformly mixing with the composite fibers, carrying out dry pressing molding, sintering, and cooling to room temperature to prepare the tundish permanent layer refractory material. The binding force between the base material and the fibers of the prepared refractory material is high, and the refractory material is good in fire resistance.

The invention belongs to the technical field of manufacturing of non-oriented electrical steel, and relates to a method for producing non-oriented silicon steel for a compressor based on thin-strip cast rolling. According to the invention, the low-silicon component design without adding Al, P, Sn and Sb is adopted, a hot-rolled thin substrate with the thickness of 0.60-0.80 mm is directly obtained through thin strip cast rolling, the finish rolling temperature T is controlled to be equal to (Ar1-70)-(Ar1-30) DEG C, and Ar1 is equal to 872 DEG C + 1000 (11 * [Si]-14 * [Mn] + 21 * [Al]); the coiling temperature is not less than 650 DEG C; after acid pickling and one-pass cold rolling, iron core blanking and stacking are directly carried out; and heat preservation is conducted for 120-180 min within the temperature range of 850-950 DEG C, and complete recrystallization annealing is conducted on the iron core. Compared with the conventional process, the process of hot rolling heating, normalizing, steel plate annealing before iron core stamping, coating and the like is omitted, the rolling reduction of hot rolling and cold rolling is greatly reduced, and the method is an energy-saving and environment-friendly short-process production technology.

The invention provides a water-cooled cast roller and a cast rolling method for a wide magnesium alloy cast plate strip, and belongs to the technical field of metal material production. By means of the structural design that the annular water channels are arranged on the periphery of the roller body section, the roller core water inlet holes and the roller core water return holes are formed in the roller core, and every two annular water channels are provided with one independent circulation system and the independent circulation systems, it can be guaranteed that cooling water evenly enters each annular water channel from at least three positions on the circumference, the cooling uniformity is high, and the service life of the roller is prolonged. Cooling is more efficient and rapid, the device can meet the production requirement of magnesium alloy cast plate strips with the width larger than 1200 mm, the cast rolling production process of the magnesium alloy with the width larger than 1200 mm is more stable, and the plate erecting process is easier.

A casting roller shape design method for cooperative control of thermal convexity compensation and edge reduction is suitable for improving casting strip section defects caused by large thermal convexity of a casting roller in the thin strip casting and rolling process and comprises the steps that a casting roller body curve is divided into a middle area and an edge area according to the thermal expansion distribution condition of the casting roller, the middle area plays a key role in the overall section contour shape of the casting strip, and the edge area adjusts the rolling reduction to avoid the edge crack defect of the casting strip. A cosine curve of the middle area is designed based on the preset maximum-diameter roller shape height and the casting roller thermal convexity; then superposing two sections of cosine curves to obtain an edge curve; and further, in combination with continuous and smooth connection conditions of the curve, a roll shape curve of the whole roll body is finally obtained. According to the method, the roll shape of the casting roll is designed based on the piecewise function, the hot convexity compensation principle is followed, meanwhile, the edge pressing control of the casting strip is considered, the problem that the section shape of the casting strip is poor due to thermal expansion of the casting roll is effectively solved, and the probability of the edge crack defect of the casting strip is reduced.

The present application belongs to the technical field of aluminum matrix composite material preparation, and particularly relates to a preparation method of reinforced aluminum matrix composite material by vacuum reciprocating smelting assisted thin strip casting and rolling. The method comprises the steps of aluminum matrix material preparation, ceramic / aluminum matrix composite powder vacuum ball milling, aluminum matrix and ceramic / aluminum matrix composite powder vacuum reciprocating smelting, thin strip casting and rolling, cast strip preliminary treatment, cast strip heat treatment, hot rolling, cold rolling and performance optimization. The aluminum alloy matrix rod with specific components is selected, the ceramic particle / aluminum matrix composite material powder with a mass fraction of 5% to 25% is prepared by vacuum ball milling, and the surface of the ceramic particle is completely attached with aluminum powder to ensure good wetting of the particle and the aluminum matrix. Subsequently, the thin strip casting and rolling, heat treatment, hot rolling and cold rolling and other treatments are performed. Finally, the ceramic / aluminum matrix composite material with the ceramic particles uniformly distributed on the matrix is prepared, which exhibits excellent tensile strength, elongation and wear resistance, and no grain boundary segregation phenomenon.

This invention provides a slitting device, including a grooved roller and multiple sets of slitting cutters. The grooved roller is rotatable around a central axis, with its outer circumference in contact with the material for continued downstream conveying and for cutting the material together with the multiple sets of slitting cutters. The outer roller surface of the grooved roller has multiple concentric annular grooves along its radial direction, spaced axially, with each groove coaxial with the grooved roller. The multiple sets of slitting cutters are suspended above the grooved roller by a cutter support frame, and their positions on the support frame are adjustable along the axial direction of the grooved roller via a cutter adjustment assembly. The blades of the slitting cutters are detachably mounted on the cutters via a blade changing assembly. This invention also proposes a steel strip casting machine equipped with this slitting device. This invention can shorten the blade replacement time of the slitting device, improve blade changing efficiency, simplify blade changing operations, and ensure the production progress of the steel strip casting machine.