1431results about "Work treatment devices" patented technology

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 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 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 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 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 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 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 relates to the technical field of low-carbon microalloyed steel production, in particular to a low-yield-ratio economical thin L450M pipeline steel plate and a manufacturing method thereof.The low-yield-ratio economical thin L450M pipeline steel plate comprises, by weight, 0.05%-0.07% of C, 0.10%-0.25% of Si, 1.50%-1.65% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.015% of S, 0.02%-0.04% of Nb, 0.008%-0.020% of Ti, 0.015%-0.04% of Al, 0.25%-0.30% of Cr, 0.003%-0.006% of N, 0.36%-0.40% of CEIIW = C + Mn / 6 + (Cr + V + Mo) / 5 + (Cu + Ni) / 15 and the balance Fe and The production process comprises the steps of molten steel smelting, external refining and degassing, continuous casting, casting blank heating, controlled rolling, relaxation, controlled cooling and air cooling to the room temperature. The method is used for manufacturing the high-strength L450M hot-rolled steel plate for the low-yield-ratio economical oil pipeline with the thickness specification of 9-17.5 mm and the pipe diameter phi of 914 mm or below, the problems that the rolling efficiency of the steel plate is low, the rolling resistance is large, the plate shape is not easy to control and the like are solved, and the steel plate is low in cost, high in strength and toughness, low in yield ratio and high in straightness.

The present invention discloses a rolling method for starting rolling of raw plates of non-oriented silicon steel with a silicon-aluminum content of 3.5-5% by threading the strip on a UCMW continuous rolling mill. The present invention adopts a method of starting rolling by pressing down in succession, which is different from the traditional method of starting rolling by pressing down in succession on 5 stands at the same time. It reasonably sets the appropriate rolling process for stands 1 to 5#, which can effectively improve the starting success rate of raw plates of non-oriented silicon steel with a silicon-aluminum content of 3.5-5%, and quickly resume production after the strip breaks during rolling. By using the method of the present invention to start rolling by threading the raw plates, the difficulty of non-steady-state rolling of each stand can be greatly reduced, the fluctuation of the rolling force and tension of each stand can be reduced, and the strip breaks during rolling can be avoided, providing the prerequisite for the UCMW cold continuous rolling mill to mass-produce high-grade non-oriented silicon steel with a silicon-aluminum alloy content of 3.5-5%.

The utility model discloses a cold rolling mill for reinforcing steel bar machining, and belongs to the technical field of reinforcing steel bar machining. The machine body comprises a transverse plate, a row of feeding ports are formed in the front end of the machine body, a row of through holes are formed in the two sides of the machine body, a T-shaped groove is formed in the machine body, a motor mounting hole is formed in the back of the machine body, the motor mounting hole is communicated with the T-shaped groove, and the cleaning assembly comprises a cleaning brush. The cleaning brush is installed in the feeding port, first bearings are arranged in the pair of through holes close to the front end of the machine body in a matched mode, first impurity removal rollers are arranged in the two first bearings in a matched mode, two electric push rods are installed on the transverse plate, the telescopic ends of the two electric push rods point to the first impurity removal rollers, and the servo motor is installed in the motor installation hole. The cleaning brush and the impurity removal roller are arranged to clean the surface of steel, meanwhile, the cutting assembly is arranged to cut rolled steel, and the problem of cleaning oxidation impurities on the surface of the steel is solved.

The invention discloses an efficient and low-cost high-strength steel plate for a 1300MPa-grade low-temperature engineering structure and a manufacturing method of the high-strength steel plate, and belongs to the technical field of low-carbon microalloyed steel production. Optimized steelmaking, heating, rolling, pre-straightening, relaxation, controlled cooling, hot straightening and tempering processes are adopted, an ultra-fast cooling and laminar cooling mode is adopted for controlled cooling, chemical components of the steel plate contain Ce, and finally the problems that the 1300MPa-level hot-rolled steel plate with the thickness of 10-50 mm produced through an online cooling process is low in toughness, high in yield ratio, low in flaw detection qualification rate and uneven in plate shape are solved.

The invention provides a high-strength aluminum-clad steel wire and a preparation method thereof.The high-strength aluminum-clad steel wire comprises a steel wire and an aluminum layer wrapping the outer surface of a steel core, the steel wire comprises, by weight, 0.85%-0.90% of C, 0.1%-0.5% of Si, 0.1%-0.5% of Mn, 0.02%-0.05% of Al, 0.10%-0.20% of Cr, 0.10%-0.15% of Ca, smaller than or equal to 0.020% of P, smaller than or equal to 0.025% of S and the balance iron and inevitable impurity elements, and the preparation method comprises the steps that a steel billet is prepared, the steel billet is subjected to hot rolling, then the steel wire is subjected to isothermal cooling, and the high-strength aluminum-clad steel wire is obtained. The cooled steel wire rod is subjected to surface cleaning and then drawn to form a steel wire with the required wire diameter, the drawn steel wire is extruded and coated with a layer of aluminum to form a bus, the bus is subjected to drawing treatment, and the aluminum-clad steel wire is obtained.The preparation method of the aluminum-clad steel wire is simple in step and convenient to operate, and the prepared aluminum-clad steel wire has the advantages of being high in strength, good in corrosion resistance and the like. And the conductive performance is high.

The utility model provides a hot-rolled strip steel cooling water circulation system, which relates to the technical field of steel hot rolling, and comprises a water collecting tank, a filter tank, a heat exchange tank and a water storage tank, the water collecting tank is arranged below a cooling device, the lower end of the water collecting tank is communicated with the lower end of the filter tank, and the heat exchange tank is communicated with the water storage tank. The upper end of the filter tank is communicated with the upper end of the heat exchange tank, and the lower end of the heat exchange tank is communicated with the lower end of the water storage tank. The water collecting tank is used for collecting used cooling water in the cooling device and preliminarily settling the cooling water, the filtering tank is used for filtering the preliminarily settled cooling water, and the heat exchange tank is used for cooling the filtered cooling water; and the water storage tank is used for storing the cooled cooling water. The hot-rolled strip steel cooling water circulation system has the effect of reducing the energy consumption and investment of the existing hot-rolled strip steel cooling water circulation system.

The invention discloses a control method and device for improving black marks on the surface of a thick plate in the technical field of controlled rolling and controlled cooling. The method comprises the steps that a pretreated plate blank is obtained; the pretreated plate blank is heated according to a preset heating system, and a heated plate blank is obtained; the heated plate blank is input into a descaling box to be descaled, and a plate blank subjected to primary descaling is obtained; the plate blank subjected to primary descaling is firstly input into a roughing mill to be subjected to cogging broadening and then input into a finishing mill to be subjected to thickness rolling treatment, and a semi-finished steel plate is obtained; and straightening and cooling the semi-finished steel plate to obtain a finished steel plate. The technical problem that in the prior art, due to existing controlled rolling and controlled cooling processes, black marks appear on the surface of the steel plate, and consequently the production cost is increased can be solved.

The invention relates to the technical field of low-carbon microalloyed steel production, in particular to an efficient rolling low-yield-ratio 345 MPa-grade low-temperature pressure vessel steel plate and a preparation method thereof.The steel plate comprises, by weight, 0.15%-0.18% of C, 0.20%-0.25% of Si, 1.05%-1.55% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.015% of S, 0.01%-0.02% of Nb, 0.015%-0.04% of Al, 0.003%-0.006% of N and the balance Fe and inevitable impurities, and the total amount of impurity elements is smaller than 0.05%; the preparation method of the steel plate comprises the following technological processes of molten steel smelting, external refining and degassing, continuous casting, casting blank heating, controlled rolling, controlled cooling and air cooling to the room temperature. According to the method, the continuous casting billet with the thickness of 170-250 mm is used for efficiently producing the 345 MPa grade steel plate with the thickness of 10-50 mm and the low yield ratio for the low-temperature pressure vessel, the steel plate has the advantages of low cost, high strength and toughness, the low yield ratio and high straightness, and the service safety of the steel plate for the low-temperature pressure vessel can be guaranteed.

The application provides a corrosion-resistant super-large line energy welding steel plate and a production method thereof, relates to the technical field of alloys, and the steel plate adopts a corrosion-resistant alloying component system with composite addition of Ce, Sn and Cu. The addition of Ce can improve the corrosion resistance of the steel plate, and Ce is easy to combine with oxygen to generate spherical oxides and has the ability to induce the nucleation of intracrystalline acicular ferrite, thereby improving the welding performance of the steel plate. On the basis of the comprehensive design of chemical components, the process parameters of rolling and cooling processes are accurately controlled to obtain the corrosion-resistant super-large line energy welding steel plate with good comprehensive performance.

The application relates to a ring rolling machine facilitating chip cleaning, and relates to the technical field of ring rolling machines. The ring rolling machine facilitating chip cleaning comprises a machine body; a material collecting box is arranged at the bottom of the machine body; mounting racks are arranged at the two sides of the machine body; exhaust fans are arranged on each mounting rack; each exhaust fan blows towards the inside of the material collecting box; a spraying assembly for settling waste chips is arranged in the material collecting box; and a collecting assembly for collecting waste chips is arranged in the material collecting box. The application has the effect of conveniently collecting oxide layer waste chips in a workpiece machining process.

The invention belongs to the technical field of pipeline steel production, and discloses a hot continuous rolling production method of Mo and Ni-free X70M pipeline steel, which comprises the processes of slab heating, rough rolling, finish rolling, laminar cooling and coiling, and the pipeline steel comprises the following chemical components in percentage by mass: 0.060 to 0.090 percent of C, 0.10 to 0.25 percent of Si, 1.50 to 1.70 percent of Mn, 0.20 to 0.30 percent of Cr, 0.045 to 0.070 percent of Nb, 0.020 to 0.050 percent of Al, less than or equal to 0.005 percent of S, less than or equal to 0.012 percent of P, 0.020 to 0.030 percent of Ti, less than or equal to 0.0050 percent of N and the balance of Fe and inevitable impurities. According to the pipeline steel, Mo and Ni are not added, the alloy cost is extremely low, meanwhile, a hot rolled steel strip of the pipeline steel has good low-temperature tearing resistance and low yield ratio, and the safety in the pipeline service process can be guaranteed.

The invention discloses a high-surface-quality invar alloy cold-rolled steel strip and a manufacturing method thereof.The manufacturing method comprises the working procedures of acid pickling, cold rolling and pre-pressing, coping, cold rolling and rolling, cleaning, annealing, leveling, shearing and packaging, the surface of an invar alloy hot-rolled steel coil is subjected to acid pickling through a mixed acid solution, cold rolling and pre-pressing are conducted through three-pass cold rolling and rolling, and the surface quality of the invar alloy hot-rolled steel coil is improved. At least three pairs of grinding heads are adopted for grinding, the grinding frequency is not less than 3 times, multi-pass cold rolling is carried out after grinding, the number n of rolling passes meets the condition that n is larger than or equal to 0.5 * m + 1, m is the thickness of the ground cold-rolled steel strip, and the unit is mm. According to the method, the technical problems that the surface quality of the invar alloy cold-rolled strip is difficult to control, the requirement is high and the like can be effectively solved, invar alloy products with high surface quality and high plate shape requirement are prepared, and the high-surface-quality use requirement of a user is met.

The present invention belongs to the field of ferrous metallurgy, and relates to an EH40 crack arrest steel plate for a container ship and a manufacturing method therefor. The steel plate comprises the following chemical components in percentages by mass: C: 0.03-0.06%, Si: 0.15-0.30%, Mn: 1.10-1.30%, P≤0.0080%, S≤0.0030%, Nb: 0.010-0.020%, V: 0.035-0.055%, Ti: 0.008-0.020%, Ni: 0.45-0.65%, Cu: 0.10-0.30%, Ca: 0.0005-0.0020%, H≤0.00015%, Ceq≤0.42%, and the balance of Fe and inevitable impurity elements. The steel plate has a yield strength of 409-440 MPa, a tensile strength ranging from 595 MPa to 625 MPa, a yield ratio of 0.84-0.88, and a longitudinal impact toughness value at -60ºC of greater than or equal to 250 J; and during instrumented impact testing, the energy E3 for crack arrest / unstable propagation and the absorbed energy E4 after crack arrest / unstable propagation account for more than or equal to 20% of the total impact absorption energy, and therefore the steel plate has good crack arrest performance.

The invention relates to the technical field of guide arm spring flat steel, and discloses a guide arm spring flat steel surface crack control technological method.The guide arm spring flat steel surface crack control technological method comprises the following technological methods of S1, smelting technology optimization, S2, continuous casting technology control, S3, rolling technology optimization and S4, quality detection and feedback adjustment. In the smelting stage, through slag stopping and tapping, LF furnace long-time refining white slag making (the alkalinity is 5.0-7.0, and the white slag retention time is longer than or equal to 30 min) and vacuum deep degassing (the vacuum degree is smaller than or equal to 67 Pa, and the retention time is longer than or equal to 15 min), the content of gas (the hydrogen content is smaller than or equal to 1.5 ppm) and the content of inclusions in steel are remarkably reduced, component fluctuation in the later period is avoided through accurate use of a diffusion deoxidizing agent (the use amount is larger than or equal to 80 kg / furnace), a pure molten steel foundation is laid for the follow-up process, and the production cost is reduced. And crack inducements caused by inclusion and gas are reduced from the source.

The invention relates to the technical field of low-carbon microalloyed steel production, in particular to a high-efficiency rolled thin L450M pipeline steel plate and a manufacturing method thereof, the steel comprises the following chemical components in percentage by weight: 0.05%-0.07% of C, 0.10%-0.25% of Si, 1.45%-1.55% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.05%-0.06% of V, 0.05%-0.10% of Cr, 0.008%-0.020% of Ti, 0.015%-0.04% of Al, 0.005%-0.009% of N and the balance of Fe and inevitable impurities, and the total amount of impurity elements is less than 0.05%; the production process of the steel plate comprises the steps of molten steel smelting, external refining and degassing, continuous casting, casting blank heating, controlled rolling, controlled cooling and air cooling to the room temperature. The method is used for manufacturing the high-strength L450M hot-rolled steel plate for the oil pipeline with the thickness specification being 9-15 mm and the pipe diameter being phi 914 mm or below, the problems that the steel plate rolling efficiency is low, the rolling resistance is large, the steel plate performance uniformity and the plate shape are not easy to control and the like are solved, and the steel plate has the advantages of being low in cost, high in strength and toughness, high in strength, excellent in low-temperature toughness and the like.

The invention discloses a torsion guide structure for a rolled piece, and relates to the technical field of metallurgical steel rolling, the guide structure comprises guide roller assemblies arranged in pairs and an outlet guide used between finish rolling continuous flat racks, and the guide structure can utilize an asymmetric clamping area to pass through diagonal distribution of a plane working face and a semi-R arc-shaped working face; the semi-R arc-shaped working face is attached to the curved surface of one side of the rolled piece to form linear contact, the plane working face is in point contact with the other side of the rolled piece, and the height difference between the plane working face and the plane working face is matched to form a stable triangular constraint structure. According to the structure, the central axis of a rolled piece is always kept unchanged in the torsion process, the contact area is increased by 40%-50% compared with that of a flat roller, clamping force is distributed in a gradient mode in the circumferential direction of the section of the rolled piece, rigid extrusion of a symmetrical structure is avoided, tiny deformation of the rolled piece is absorbed through flexible contact of a plane working face, dynamic self-adaptive clamping is achieved, and the service life of the rolled piece is prolonged. And the torsion angle deviation is controlled within + / -2 degrees.

The utility model discloses a novel oxide scale collecting device. Which comprises a hot-rolled rod and wire conveying roller way, and is characterized in that a chain plate type conveyor is arranged below the roller way; a slag collecting hopper is arranged at the tail part of the chain plate type conveyor; and an iron sheet slag collecting box is arranged below the slag collecting hopper. According to the utility model, the oxide scale does not need to be flushed into the rotational flow well or the primary sedimentation tank by using additional slag flushing water and slag flushing runner and then is collected by using a grab bucket type travelling crane, so that energy conservation and emission reduction are realized. Meanwhile, the design of a slag sluice of a furnace discharging table and a slag sluice of a roughing mill unit area is omitted, only the slag sluice with small gradient and depth in the area from an intermediate mill unit to a finishing mill unit is reserved, and a large amount of cooling water doped with only a small amount of oxide scale powder can be recycled.

The invention provides a rolling method of cathode flat steel, which comprises the following steps: firstly, heating a casting blank to obtain a heated blank, then carrying out surface descaling on the heated blank, and carrying out multi-pass rough rolling to obtain an intermediate blank; the heating treatment comprises a preheating section and a soaking section; the heating treatment is specifically a heating treatment process for controlling the austenite grain size of the casting blank; the multi-pass rough rolling comprises multi-pass rough rolling of which the reduction rate is sequentially reduced; and carrying out multi-pass finish rolling on the intermediate billet obtained in the previous step, carrying out on-line cooling, and then carrying out stacking slow cooling to obtain the rolled and formed cathode flat steel. According to the method, directional improvement of the conductivity of the electrolytic aluminum cathode flat steel is achieved through rolling process optimization, heating under a rolling path of a low-temperature ferrite area and rolling pass reduction distribution design are focused, the ferrite grain size and the conductive texture of a material are cooperatively regulated, the normal conductivity of the cathode flat steel is improved, and the conductivity of the cathode flat steel is improved. And a core material support is provided for reducing ineffective current loss in the electrolytic aluminum industry.

The invention relates to a production method of high-grade non-oriented silicon steel hot-rolled strip steel, and belongs to the technical field of steel preparation. The method comprises the following steps: carrying out heating treatment on a non-oriented silicon steel continuous casting sheet billet containing specific alloy components, and controlling the tapping temperature of the heating treatment to be a set tapping temperature; carrying out rough rolling on the heated non-oriented silicon steel continuous casting sheet billet to obtain an intermediate billet; the intermediate billet is subjected to finish rolling, and hot-rolled strip steel is obtained; and the hot-rolled strip steel is subjected to laminar cooling, coiling, heat preservation and edge cutting, and the high-grade non-oriented silicon steel hot-rolled strip steel is obtained. Key process parameters of each hot rolling process are accurately controlled, and batch stable production of the high-grade non-oriented silicon steel with high silicon and high nickel alloy components is realized. According to the method, the edge qualification rate and the yield are increased, the harsh requirements of users for the material performance, the size and the strength are met, and key material support is provided for strategic emerging industries such as new energy automobiles and unmanned aerial vehicles.

The invention relates to the technical field of angle steel production, and particularly discloses an automatic angle steel machining production line which comprises a heating mechanism, a feeding mechanism and a discharging mechanism. The forming mechanism is used for rolling the blank and rolling the blank with the rectangular section into the angle steel with the L-shaped section; the shearing mechanism is used for cutting off the formed angle steel; the cooling mechanism is used for intermittently conveying the cut angle steel; and the overturning mechanism is used for overturning the angle steel in the conveying process. According to the angle steel production line, the working procedures of heating, forming, shearing, cooling, overturning and the like are integrated, full-process automation of angle steel production is achieved, the problems of low efficiency and high manual dependence degree caused by traditional sectional type production are solved, the production efficiency is improved, and the labor intensity is reduced.