48results about How to "Small amount of depression" patented technology

The invention discloses a process for producing thin gauge pipeline steel by using a double-stand medium and heavy plate mill. A plate blank with the thickness of 180 mm is used for producing the thin gauge pipeline steel with the thickness less than 10 mm. On the basis that the performance of a rolled piece meets requirements, the thin gauge pipeline steel with a good plate shape can be obtained by controlling the tapping temperature of the plate blank, the rough rolling broadening pass pressing rate, the longitudinal rolling pass pressing rate after rough rolling broadening pass, the rough rolling finishing temperature, the thickness of a middle blank, the finish rolling ending pass pressing rate, the finish rolling finishing temperature, the roller gap inclination and sled function in the rolling process, a high pressure water descaling system, the water entry temperature, the re-reddening temperature, and the head and tail shielding and straightening process of a laminar cooling system. The deformation rate is reduced, and the economic benefit is increased.

The invention discloses a method for rolling a thin high-strength steel plate of a single-frame steckel mill. The method comprises the following steps: producing the finished product of a high-strength steel plate with a thickness less than 10 millimeters by using a blank with the thickness of 150 millimeters and the length more than 10 meters; and then acquiring the thin high-strength steel plate with qualified property and plate shape by controlling a tapping temperature, a coiler furnace temperature, a reduction in last pass, a roller force, a final rolling speed and a high pressure water de-scaling system. When the rolling method is used for producing the thin steel plate, the thin high-strength steel plate is rolled by utilizing the heat preservation function of front and back mill coiler furnaces and controlling the tapping temperature of the blank, the reduction in the last rolling pass, the roller force and the final rolling speed, and the acquired plate shape and property of the steel plate are both qualified, thereby increasing the rolling mill capacity and achieving high plate yield and high property yield.

The invention discloses a forming method for a high-interface-bonding-strength copper/aluminum composite material, and belongs to the technical field of metal laminar composite material preparing. According to the forming method, to-be-combined surfaces of a copper plate and an aluminum plate are machined, macroscopic rugged to-be-combined surfaces are obtained, a louvre blade is adopted for conducting grinding treatment on the to-be-combined surfaces, the direction of stripes formed through grinding is perpendicular to the rolling direction, then, the copper plate and the aluminum plate are overlapped up and down or arranged left and right side by side to be in butt joint, and a copper/aluminum assembly is obtained; then, single-pass low-rolling-reduction cold rolling pre-composition is conducted, high-temperature short-time heating is conducted, finally, single-pass hot rolling final composition is conducted, and the high-interface-bonding-strength copper/aluminum composite materialis obtained. The forming method has the advantages that the capability requirement for a rolling machine needed for producing the copper/aluminum composite material is low, the technology is simple, the production cost is low, a macroscopic composite interface of a non-flat artificial structure and a microcosmic composite interface of a particle pinning structure can be obtained, the interface bonding strength is larger than or equal to 90 MPa, the applicable copper/aluminum composite material range is wide, and industrial popularization is easy.

The invention discloses a near-net forming preparation method of a super duplex stainless steel thin strip. The composition is as follows in terms of mass percentage: C: 0-0.03%; Cr: 24-32%; Mn: 0.5-2.5%; N: 0.3 ~0.5%; Mo: 2~6%; Ni: 4~8%; the balance is iron and other unavoidable impurities; the preparation method includes the following steps: (1) smelting and strip continuous casting to obtain a thin strip blank, the Said smelting temperature is 1530~1570 ℃; (2) online hot rolling, said hot rolling reduction rate is 20%~30%; (3) pickling; (4) cold rolling, said cold rolling total reduction is 60% ~85% (5) solid solution treatment; the thin strip obtained by the present invention has good mechanical properties and excellent corrosion resistance, compared with the conventional process, its yield is greatly improved, and energy consumption is greatly reduced.

The invention relates to a high-sulfur steel rolling process. The process comprises the following steps that a heating furnace is used for heating, a continuous casting billet is fed into the heatingfurnace to be heated according to a heating standard, and is discharged after meeting the process requirements; then scale on the surface of a steel billet is removed by using high-pressure water, rough rolling is conducted by adopting a two-roll reversing mill, and rough rolling is conducted by adopting a soft reduction rolling process to obtain a rolled billet; defects of the end part of the rolled billet are cut off, and then intermediate rolling and finish rolling are conducted by adopting a continuous rolling machine; and the finish rolled billet is cut to specific length by using a sheargauge, then segmenting is conducted by using an abrasive-disk cutter, so that round steel is obtained, the received round steel is subjected to finish machining such as chamfering, heat treatment andflaw detection. The problems that high-sulfur steel slips during rolling and end cracking is produced can be well solved, the process is simple and feasible, the requirements of stable production ofhigh-sulfur steel are further met, the production cost is effectively lowered, and the production efficiency is improved.

The invention discloses a non-oriented silicon steel and a production method thereof. Molten steel is smelted by adopting a vacuum induction furnace. Molten steel is directly cast into a cast belt with the thickness between 1mm and 3mm through a pair of crystallization rollers rotating in opposite directions. The casting temperature of the molten steel is between 1500 DEG C and 1700 DEG C. The cast belt is subjected to one pass or multiple passes hot rolling and rolled into hot-rolled strip steel with thickness being 0.7mm and 2.5 mm. The hot rolling temperature is between 800 DEG C and 1150 DEG C, and the hot-rolled strip steel is coiled into a roll at the temperature between 500 DEG C and 800 DEG C. Normalizing annealing is conducted on the hot-rolled steel roll after the hot-rolled steel roll is subjected to a levelling or tension levelling working procedure with the elongation rate being 1.0% and 5.0%, and the normalizing annealing temperature is between 700 DEG C and 1000 DEG C. After the steel roll after normalizing annealing is subjected to cold rolling and the final annealing and coating working procedures, low-iron loss and high magnetic induction non-oriented silicon steel products are acquired. The non-oriented silicon steel products manufactured with the production method has high-proportion magnetic induction-favorable <100> and <110> structures, and the product magnetic induction is above 1.80 T.

The invention belongs to the technical field of preparation of metal laminated composite plates, and particularly relates to a method and device for preparing a steel/aluminum laminated composite plate by hot continuous rolling with small rolling reduction. The device for preparing the steel/aluminum laminated composite plate by hot continuous rolling with small rolling reduction comprises a roller way, a cold rolling mill, a flat plate type induction heating device, a cooling device and a hot rolling mill, wherein the cold rolling mill, the flat plate type induction heating device, the cooling device and the hot rolling mill are sequentially arranged in the roller way from left to right to form a rolling production line. Corrugation is processed on the surface to be compounded of the steel plate to be compounded, cold rolling is carried out, and the steel side of the meshed steel/aluminum laminated composite plate formed by cold rolling is rapidly heated, so that the micro-scale solid-liquid phase phenomenon occurs on the bonding surface of the meshed steel/aluminum laminated composite plate, rapid cooling and hot rolling are carried out, and the steel/aluminum laminated compositeplate is prepared by hot continuous rolling with small rolling reduction, the interfacial space metallurgical bonding thick-specification steel/aluminum laminated composite plate can be prepared, theproduct performance is stable, and the bonding strength is high.

The invention discloses a production method with low energy consumption, 24 passes and high efficiency for hot rolling of a phi-8 coiled reinforced bar. The production method comprises four rolling mills for rough milling, six rolling mills for intermediate rolling, four rolling mills for finish rolling of bars and ten rolling mills for finish rolling of wires, wherein 1H to 3H racks roll by adopting a slotless form; 4V to 14V racks and No.15 to No. 24 racks roll by adopting a round/elliptical pass form; the 14V rack produces rolled pieces which are round bars of 24+/-0.5mm; the pass width of the No.15 rack is 32.1-32.3mm, and the pass height is 16.15-16.30mm. According to the production method disclosed by the invention, by meticulously designing pass parameters of all the passes prior to the wire finish rolling mills for the hot rolling of the phi-8 coiled reinforced bar, and controlling the size and the precision of incoming bars for wire finish rolling, the safety of a motor of the wire finish rolling mill is guaranteed; the elongation percentage is reasonably distributed by the wire finish rolling racks, so that the phi-8 hot-rolled coiled reinforced bars are rolled on the 24 racks. Compared with a mode of rolling by 26 racks in the prior art, the mode disclosed by the invention has the advantages that the consumption of spare parts and the production energy consumption can be greatly reduced, and the production efficiency is improved.

The invention belongs to the technical field of aluminum alloys, and particularly relates to an ultra-wide aluminum alloy plate and a preparation method thereof. According to the preparation method, ultrasonic treatment is carried out in the hot rolling process, vacancies are continuously injected into materials through ultrasonic vibration, a large number of fine and dispersed nanometer precipitated phases are dynamically precipitated from the materials, and a pre-stretching procedure is added before solution treatment, so that the residual internal stress of the aluminum alloy plate is reduced, the strength and the extension performance of the aluminum alloy plate are improved, the produced aluminum alloy plate is stable in performance, high in surface flatness, low in residual internal stress and not prone to deformation during machining.

The invention discloses a production method of a high-carbon martensitic stainless steel steckel mill, and relates to high-carbon steel produced by the steckel mill and a production process of the high-carbon steel. The process technology focuses on overcoming the defects of decarburization, peeling, edge cracking, layering and the like of high-carbon martensitic stainless steel, the defects of decarburization, peeling, edge cracking, layering and the like of the high-carbon martensitic stainless steel caused by long rolling time of the steckel mill are effectively overcome by controlling the tapping temperature, heating furnace residual oxygen, pass reduction, vertical roll rolling force, a descaling system and other processes, and the surface quality and the yield are improved.

The invention relates to the technical field of wear-resistant steel, in particular to a heat treatment method for improving the uniformity of surface hardness of wear-resistant steel. The heat treatment method for improving the uniformity of surface hardness of wear-resistant steel of the present invention comprises the following steps: 1) carrying out shot blasting treatment on the wear-resistant steel plate in a hot-rolled state; 2) entering the steel plate after shot blasting treatment into a roller hearth type continuous heat treatment furnace Heating; 3) using high-pressure water in the spiral roller gap type pressure quenching machine to perform quenching treatment; wherein, the water volume of the high-pressure section of the quenching machine is 2800~3000m3/h, and the water volume of the low-pressure section of the quenching machine is 2300~2500m3/h; 4 ) Tempering the quenched steel plate. The wear-resistant steel plate produced by the production method of the invention has good hardness uniformity, excellent plate shape and good surface quality, the unevenness of the steel plate reaches 0-3 mm/m, and a tempered martensite structure is obtained. The preparation method is simple and practical.

The invention relates to the technical field of metal composite plate preparation, in particular to a rolling method for a metal composite plate with a prefabricated crossed corrugated interface, and aims to solve the technical problems that a metal composite plate manufactured by adopting an existing rolling method is low in interface bonding strength, serious in warping and edge cracking and the like. According to the technical scheme, a crossed corrugated roller with a triangular waveform is used for prefabricating corrugations on the to-be-compounded surface of a base plate, the ratio of the amplitude of the corrugated roller to the thickness of the base plate is 1/20-1/10, the reduction rate is 5%-10%, a crossed corrugated roller with a sine curve waveform is used for prefabricating corrugations on the to-be-compounded surface of a compound plate, the ratio of the wave amplitude to the thickness of the compound plate is between 1/10 and 1/2, the reduction rate of the working procedure is between 10% and 50%, and then a base plate blank and a compound plate blank are stacked and are flatly rolled under the condition that the reduction rate is lower than 50%. Compared with a traditional rolling method, the bonding strength can be improved, the residual stress can be reduced, plate warping can be controlled, and the high-quality metal composite plate can be prepared.

The invention discloses a method for improving H13 steel rolling, and H13 round steel. The method comprises the steps of heating: specifically, heating an H13 steel billet in a continuous furnace; rolling: specifically, performing multi-pass rolling for the heated H13 steel billet in a cogging mill, wherein a low pressing process is adopted in the first-pass rolling; stopping roller cooling waterfor rolling, and obtaining an H13 intermediate billet; and forming: specifically rolling and forming the H13 intermediate billet rolled by the cogging mill in a continuous rolling mill. According to the method, through improvement of a first pass, a second pass and a third pass, in the first rolling pass, the low pressing process is adopted for rolling, and the pressing amount is reduced, so thatthe press-in angle of a rolled piece in the rolling process is small, thereby facilitating press-in; meanwhile, in the second rolling pass and the third rolling pass, a high pressing process is adopted for rolling, not only are the advantages of the high pressing process reserved, and the structure center porosity of a finished product is improved, but also reduction or remelting of rolled wastesis reduced; and the production efficiency and the production cost are ensured.

The invention relates to a multiple-transmission device for a rolling mill and belongs to a multiple-transmission device for a rolling mill in metallurgy industry. The multiple-transmission device is used for solving the technical problems of high possibility of slipping, low quality passing percent of products and small rolling range of a working roll in an existing four-roll or multi-roll rolling mill. In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the multiple-transmission device for the rolling mill comprises two rolling transmission devices, wherein one rolling transmission device is a support roll transmission device; the support roll transmission device is connected with a support roll and used for realizing large-torque rolling; the other rolling transmission device is a working roll transmission device; and the working roll transmission device is connected with the working roll and used for realizing high-speed small-torque milling. The multiple-transmission device has the advantages of multiple transmission devices, good product surface quality of rolled pieces, independent transmission and simultaneous transmission.