154 results about "Sheet steel" patented technology

The invention discloses 900MPa-grade hot-rolled high-strength structural steel for a CSP production line. The 900MPa-grade hot-rolled high-strength structural steel comprises the following chemical components in percentage by weight: 0.050-0.069% of C, less than or equal to 0.20% of Si, 1.50-1.70% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.15-0.20% of Ti, 0.18-0.55% of Cr, 0.02-0.08% of V, 0.03-0.06% of Alt, 0.001-0.004% of Ca, less than or equal to 0.004% of N and the balance of Fe. And 18 < = (Ti + V) * 104 < = 25. The low-cost alloy component design is adopted, the optimized steelmaking and hot rolling procedures are combined, the strength and plasticity of the hot-rolled structural steel can be effectively improved, and low-cost production of a thin steel plate strip with the tensile strength larger than or equal to 900 MPa is achieved; and after-treatment processes such as cold rolling or heat treatment for regulating performance are not needed, so that the production process can be greatly shortened, procedures are saved, and the method is suitable for popularization and application.

The present invention relates to a method for manufacturing a stator for an axial gap-type motor, which can minimize core loss due to eddy current by configuring split teeth using a multi-stage laminated core formed by stacking multiple sub-laminated cores having different shapes. According to the present invention, the method for manufacturing a stator comprises the steps of: preparing multiple sub-laminated cores having different shapes by primarily stacking multiple thin steel pieces for each type; preparing multiple divided teeth by secondarily stacking the multiple sub-laminated cores; forming a waterproof coating film on an exposed flat surface of a shoe of the multiple divided teeth, the waterproof coating film being made of a film thinner than a waterproof partition wall; and forming, when injection molding a body case, a front end of each of the multiple divided teeth by an insert molding method to be embedded in the waterproof partition wall.

This invention discloses a method for fixing a seepage-proof transition section on an irregular rock slope in a mine landfill. A seepage-proof cementitious composite sprayed material is wet-sprayed onto the irregular rock slope (1-2), forming a seepage-proof cementitious composite sprayed material layer (2) on the surface of the seepage-proof transition section. A seepage-proof geomembrane (3) is laid from the regular rock slope (1-1), and then rubber pads (7) and thin steel plates (6) are laid on the geomembrane (3) from the inside out. Hollow grouting anchors (4) are self-drilled through the holes in the thin steel plates (6) and rubber pads (7), and the edges are trimmed with a seepage-proof sealing agent (8). This invention is applied to the reinforcement of seepage-proof transition sections on irregular rock slopes in mine landfills, overcoming the problem of easy damage during the fixing process of seepage-proof transition sections on irregular rock slopes, eliminating potential hazards, and improving the safety and reliability of the seepage-proof system. It not only has good economic benefits but also significant safety and environmental benefits.

This invention provides a highly economical nesting drainage pipe by forming connecting sections between pipe bodies without creating enlarged diameter sections. [Solution] This is a nesting drain pipe 1 in which, among a plurality of pipes of different diameters, one pipe 20 can be inserted into the outer pipe 10 which has a larger diameter. When the inner pipe 20 extends, the tip of the outer pipe 10 at the connecting portion that contacts and connects with the outer pipe 10 is reduced in diameter, and a protrusion 22a provided on the outer circumference of the base end 22 of the inner pipe 20 engages with the reduced diameter portion 13a, thereby forming the connecting portion without expanding the base end 22. Each of the plurality of pipes 10 and 20 is provided with a water collection hole 25 along its entire length. The protrusion 22a is formed from a protruding material such as a thin steel plate, screw, rivet, pin, dowel, or weld bead, or from a wound material such as wire, tape, or pipe, or by crushing the edge of the base end of the pipe.

The invention relates to a metal mold extrusion imbedding method, which is specially used for an imbedding casting which cannot be used for imbedding a large-proportion insert in gravity casting, and comprises the following steps of: fixing all inserts on an insert assembly which is made of a thin steel plate, can be put into a metal mold, has a casting appearance, is provided with an opening at the upper end and is used for isolating molten steel from directly contacting with the metal mold; the method comprises the following steps: putting an insert assembly into a furnace, heating to 600-1000 DEG C, putting into a metal mold, closing and locking the mold, quantitatively pouring molten steel at an upper end opening, starting a press, carrying out closed extrusion on the molten steel by an upper mold, enabling the molten steel to enter a small space between inserts, and wetting the surfaces of the inserts at a certain temperature under pressure to form metallurgical bonding.

The invention belongs to the technical field of metal material surface treatment, and discloses a production process of a weldable electroplated chromium plate. According to the process, cluster-shaped peak morphology is transferred on the surface of a cold-rolled steel coil through a laser texturing roller, and staged double-layer chromium electroplating is combined, specifically, a discontinuous chromium layer is formed on the top of a micro convex peak through first-time high-current pulse electroplating, and local iron leakage points are reserved; the second low current direct current plating covers an ultrathin continuous chromium film to maintain macro passivation. According to the invention, a composite functional structure with both macroscopic passivation integrity and microcosmic conductive selectivity is constructed on the surface of chromium-plated iron by accurately controlling the microstructure of the surface of a base material and double-layer chromium plating process parameters, so that the technical bottleneck of the chromium-plated plate in resistance welding application is effectively solved, collaborative optimization of weldability and corrosion resistance is realized, and the application range of the chromium-plated plate in resistance welding is widened. And a reliable technical path is provided for comprehensive replacement of chromium-plated iron in the field of metal packaging.

This invention relates to a novel shear wall, and more particularly to a prestressed self-centering steel plate-concrete composite shear wall, belonging to the field of structural engineering technology. This shear wall consists of a surface steel plate, internal concrete, thermal insulation materials, double-steel-tube concrete columns, connecting angle steel, square tie rods, anchorages, and prestressing tendons. The surface steel plate is made of thin steel; the internal thermal insulation materials are materials such as rock wool; the double-steel-tube concrete columns have round steel tubes inside and square steel tubes outside; the prestressing tendons are unbonded post-tensioned prestressing tendons. The prestressed self-centering steel plate-concrete composite shear wall provided by this invention is a novel lateral force resisting component for high-rise structures or other structures. It features light weight, good seismic performance, and high ductility, making it an excellent lateral force resisting component.

This invention discloses a method for controlling the edge waviness problem at the head of wide, thin steel plates, relating to the field of steel plate processing quality control technology. The specific steps include obtaining a preset value Fb for the bending roll force. 预 Determine Fb 预 Rolling length L acting on the head of the steel plate 头 Before the steel plate is bitten in during the finishing rolling stage, follow Fb 预 A bending force is applied to create a negative convexity in the transverse loaded roll gap of the rolls; rolling begins when the head of the steel plate bites in, continuing until the rolling length reaches L. 头 Then, restore the bending roll force to its initial value and continue subsequent steel plate rolling. Using the method of this invention, the problem of edge waviness at the head of wide, thin steel plates can be effectively controlled, enabling the straightness of the steel plate head to reach 1.2mm / 1000mm.

The invention belongs to the technical field of steel plate cutting, and particularly relates to steel plate cutting equipment for steel machining, which comprises a machining platform, the upper end of the machining platform is fixedly connected with a placing table and a guide track plate, the guide track plate is located above the placing table, and a plasma welding gun is arranged below the guide track plate; and the pressing and fixing mechanism is used for pressing the upper end of the steel plate before cutting so as to prevent the steel plate from deviating during cutting, the pressing and fixing mechanism comprises a fixing plate fixedly connected to the lower end of the guide rail plate, and the lower end of the fixing plate is rotationally connected with two threaded rods. On the basis of hierarchical control of hydraulic pressure (through automatic pressure release valves with different threshold values), self-adaptive speed regulation of'thin-fast thick-slow 'is achieved, when a steel plate is thin, a plurality of moving rods stretch out, the cutting speed is increased, and plasma arc burning through caused by overheating is avoided; when the steel plate is thick, only a small number of moving rods stretch out, the cutting speed is reduced, and the plasma arc fully melts metal.

The invention relates to a 9Ni steel plate for ship LNG storage tank with high strength and low yield ratio. According to the mass percentage, the chemical constituents are C: 0.02-0.05%, Si: 0.10-0.30%, Mn: 0.50-0.80%, Ni: 8.90-9.50%, P: ≤0.0070%, s: ≤0.0020%, Cr: 0.10-0.25%, Alt: 0.010-0.035%, Nb: 0.010-0.020%, Ca: 0.0005-0.0030%, O: ≤0.0012%, N: ≤0.004%, H: ≤0.00015%, and the balance is Fe and unavoidable impurity elements. The production process flow is: smelting in a converter or electric furnace→RH vacuum degassing→LF refining→RH high vacuum degassing→Ca Treatment→continuous casting→slab slow cooling treatment→slab surface cleaning→heating→rolling→quenching→tempering. For the 9Ni steel, especially the 9Ni thin steel plate, the invention adopts the constituents design of low C, 9% Ni, addition of Nb and Cr. The steel plate is subject to high-temperature hot rolling, and then QLT heat treatment process to obtain 9Ni steel with good strength, toughness and low yield ratio.

The utility model provides a numerical control machine tool isolation door, which relates to the technical field of numerical control machine tools, and comprises a linear module, a spliced isolation door, a mounting cavity and an anti-puncture protection plate, a linear module is adopted to drive a spliced isolation door replacing a sliding block of the linear module, the spliced isolation door is shielded in front of a feeding window of an outer protective cover of the numerical control machine tool, and the linear module drives the spliced isolation door to transversely move to control whether the feeding window of the outer protective cover of the numerical control machine tool is shielded or not. And the installation cavities in the upper side and the lower side of the splicing type isolation door are filled with the anti-puncture protection plates, splashing crushing cutters are blocked through the anti-puncture protection plates, the better anti-puncture effect is achieved compared with a thin steel plate, and the safety of machine tool operators is protected.

The invention relates to a method for producing components from sheet steel, wherein a sheet steel blank is cut out of a flat, hot- and cold-rolled steel strip coated with a zinc-based coating, and at least sub-regions of the sheet steel blank are either heated to a temperature above Ac3 and then shaped in a hot state in a press-hardening tool and quench-hardened, or the sheet steel blank is cold-formed into a sheet steel preform and the sheet steel preform is then quench-hardened in a hot-stamping tool, wherein, for heating from 420°C to 530°C, the heating rate is set such that the degree of discoloration towards silver S is greater than 1, and wherein the heating takes place with a heat-up rate that is variable over the furnace dwell time and dependent on the zinc layer thickness.

This application discloses a dual-drum vulcanizing device. The vulcanizing apparatus includes a vulcanizing support frame fixed to the upper surface of a base, a pair of horizontally distributed vulcanizing drums rotatably connected to the vulcanizing support frame, a pair of horizontally distributed guide rollers rotatably connected to the vulcanizing support frame, a central pressure roller mechanism, a pair of drive roller mechanisms, a pair of tension roller mechanisms, and a thin steel plate pressure belt. The pair of guide rollers are located above the pair of vulcanizing drums and between the pair of guide rollers. The pair of tension rollers are located below the pair of vulcanizing drums and between the pair of tension rollers. The pair of drive rollers are located between the lower parts of the pair of vulcanizing drums. The central pressure roller is located between the upper parts of the pair of vulcanizing drums. The thin steel plate pressure belt is wound around the pair of tension rollers, the pair of guide rollers, the pair of vulcanizing drums, the central pressure roller, and the pair of drive rollers. In this application, both the inlet and outlet are located below the pair of vulcanizing drums, allowing for a larger wrap angle between the two vulcanizing drums and improving vulcanizing efficiency.

A thin, high-strength steel sheet with a tensile strength of 1180 MPa or more is provided, exhibiting excellent malleability, excellent delayed fracture resistance from a base steel sheet, and excellent delayed fracture resistance from a projection weld, along with a method for its manufacture. The thin, high-strength steel sheet has a chemical composition containing C, Si, Mn, P, S, Al, and N, with the remainder consisting of Fe and unavoidable impurities, and a complex structure containing ferrite, quenched martensite, and bainite, wherein a volume fraction of the total quenched martensite and bainite contains five or more carbides with a particle size of 0.1 µm or more.0 µm or less in a grain with respect to the total quenched martensite and bainite is 85% or more, whereas the mass % of C and the mass % of Mn in a region of 20 µm or less in the thickness direction from a surface of the steel sheet is 20% or less with respect to the mass % of C and the mass % of Mn in a region of 100 µm or more and 200 µm or less from the surface of the steel sheet.

A shaped sheet metal part formed from a sheet steel blank includes a steel substrate which consists of a steel which includes 0.1-3% by weight of Mn and optionally up to 0.01% by weight of B. The shaped sheet metal part has an aluminum-based anticorrosion coating on at least one side and is characterized in that the magnitude of the hardness gradient of anticorrosion coating and steel substrate perpendicular to the surface of the steel substrate is less than 1.7 GPa / μm. A process for producing such a shaped sheet metal part.

The utility model provides an aerial fog cooling experimental device, and belongs to the technical field of metallurgical equipment. Comprising a linear motor which is composed of a linear motor rotor and a linear motor permanent magnet guide rail. The auxiliary sliding guide rail is parallel to the linear motor permanent magnet guide rail, and a hollow area is formed between the auxiliary sliding guide rail and the linear motor permanent magnet guide rail; the upper spraying beam is arranged right above the hollow area; the lower spraying beam is arranged under the hollow area; the test piece tray is of a hollow structure and can do reciprocating motion on the linear motor permanent magnet guide rail, and the hollow structure is matched with the hollow area. According to the utility model, the linear motor is adopted to drive the test piece to move in the aerial fog cooling area, so that a wide movement speed adjusting range can be realized, and thin steel plate test pieces with different thickness specifications can pass through the cooling area according to the speed requirement of the actual casting and rolling process.

A kind of prestressed fiber cloth tensioning system applied to bridge reinforcement construction, relate to the method for reinforcing bridge, including fixed mechanism, fiber cloth and tensioning mechanism;Fixed mechanism includes thin steel plate and two groups of pressing tool;Tensioning mechanism includes tensioning fixed seat, counter-force block, jack, round shaft, screw rod and pressing plate;Jack is connected between tensioning fixed seat and counter-force block, sets up tensioning stroke groove on tensioning fixed seat, round shaft is arranged in tensioning stroke groove, and round shaft is connected with counter-force block by screw rod;Pressing plate is set on the side of tensioning fixed seat, and pressing plate is connected with tensioning fixed seat by support;Strut is set between pressing plate and tensioning fixed seat;One end of fiber cloth is pressed between thin steel plate and bridge, and fiber cloth is pressed by pressing tool, and after passing through pressing plate and strut, the other end passes through strut and pressing plate again.Fiber cloth avoids collapse, sliding phenomenon in the process of tensioning.

The invention discloses a floor thickness control device and process integrated with a protective layer cushion block, and aims to solve the problems that a traditional steel bar protective layer cushion block is easy to displace, and the floor thickness needs to be additionally controlled. The device consists of a cake-shaped cushion block, a U-shaped metal bracket and a hard plastic sleeve, wherein the cake-shaped cushion block is integrally cast with the U-shaped metal bracket by adopting cement mortar or fine aggregate concrete; the U-shaped metal support comprises a thin steel plate strip and two vertical steel bar end rods welded to the two ends, when the device is installed, the thin steel plate strip is tightly attached to the bottom face of a floor lower layer stressed steel bar, and the vertical end rods are limited to avoid displacement of the cushion block. After a floor reinforcement cage is bound, the vertical end rod is tightly sleeved with a hard plastic sleeve, and the sum of the height of the sleeve and the thickness of the cushion block is equal to the designed thickness of a floor; when concrete is poured and plastered, accurate control over the thickness of the floor slab is achieved through the height of the top face of the sleeve, open holes are formed in the side wall of the sleeve in a staggered mode, an inner cavity is filled with cement paste, and floor slab holes are prevented. Double precise control over the floor slab protection layer and the thickness is synchronously achieved through the integrated composite component, the working procedure is simplified, the efficiency is improved, and the cast-in-place floor slab construction technology is efficiently improved.

A pressing tool has a support structure made of sheet steel. The pressing tool is formed by a press plate or endless belt and configured to press material panels in hot presses. The support structure of the pressing tool thereby has a coarse structure with a depth of at least 150 μm produced by at least one processing operation. At least a partial region of the coarse structure is rounded by laser polishing. The surface of the pressing tool has a fine structure produced by at least one processing operation. Further, a method manufactures the pressing tool and a method manufactures a material panel using the pressing tool.

The invention belongs to the technical field of coal chemical industry, oil shale and biomass pyrolysis, and particularly relates to a high-temperature flue gas heat tracing structure of a raw gas dust removal device, which is characterized by comprising a masonry structure layer, a high-temperature flue gas heat tracing layer and a heat insulation layer, the masonry structure layer is arranged on the innermost side of the structure to replace the original outer wall of the dust removal device, and the high-temperature flue gas heat tracing layer is arranged on the heat insulation layer. The heat insulation and preservation layer is arranged on the outer side of the masonry structure layer, the high-temperature flue gas heat tracing layer is arranged between the heat insulation and preservation layer and the masonry structure layer, a channel of high-temperature heat tracing flue gas is formed in the high-temperature flue gas heat tracing layer, and the temperature of the high-temperature heat tracing flue gas is not lower than the temperature of raw coke oven gas in the raw coke oven gas dust removal device; the heat insulation layer is composed of a structure supporting body, a heat insulation layer and a metal isolation layer, and the metal isolation layer is a heat-resistant thin steel plate. The outer wall has the beneficial effects that high-temperature flue gas is prevented from entering the dust removal device to generate adverse effects on raw coke oven gas components, and compared with the outer wall of the conventional dust removal device with a heat-resistant steel structure, the manufacturing cost of the dust removal device can be greatly reduced.

The application belongs to the technical field of crane application, and specifically provides a crane intelligent magnetic separation method, device and system. The method comprises the following steps: collecting relevant information of a steel plate and control information of a crane PLC; storing the collected information after processing; matching the processed data with control model library data; if the matching is successful, outputting an instruction to the crane PLC control system according to the optimal magnetic force of the matched steel plate in the control model library and the working number of electromagnets to complete the feeding and discharging and position moving of the steel plate; if the matching fails, analyzing the correlation of different data types of the collected data, obtaining a mathematical model of the steel plate specification and the electromagnetic force coupling of electromagnets through iterative evolution; and storing the optimal magnetic force of the steel plate and the working number of electromagnets obtained through a simulation experiment into the control model library. The modelized magnetic force control realizes the suction and release of multi-specification thin steel plates in multiple working modes, and solves the problem of restricting the improvement of production efficiency.

The utility model belongs to the technical field of doors of new energy automobiles, and particularly relates to a thin steel plate for doors of new energy automobiles, which comprises a steel plate body formed by stamping a 0.8-2mm thin steel plate, and further comprises a corrosion-resistant layer arranged on the steel plate body, a heat-resistant layer arranged on the corrosion-resistant layer, and arc-shaped edges arranged at four corners of the steel plate body and used for preventing collision, the heat dissipation assembly is arranged on the steel plate body and used for dissipating heat of the steel plate body; the water guiding assembly is arranged on the steel plate body and used for guiding out water on the steel plate body, and the corrosion-resistant layer is a heat-resistant polymer, is made of polyimide and has high heat-resistant temperature and chemical corrosion resistance. The automobile door steel plate is simple in structure, heat can be conducted out and the temperature of the automobile door steel plate can be reduced when the automobile door steel plate is in a high-temperature state, the situation that the service life of the automobile door steel plate is shortened due to long-time high temperature is avoided, and people can use the automobile door steel plate conveniently.

A fastening bolt rivet assembly for preventing looseness and interface sideslip of a sheet steel structure is suitable for fixing the sheet steel structure and comprises a bolt body and a fixing seat. The bolt body is of a hollow structure with an upper opening and a lower opening, has a certain length and is suitable for being inserted into a through hole in the sheet steel structure to be fixed. The fixing base is arranged at one end of the bolt body and extends outwards by a preset width relative to the circumferential direction of the bolt body, the middle of the fixing base is also of a hollow structure, the bolt body is communicated with the hollow structure of the bolt body and comprises a deformation area, and an outward protruding structure is formed relative to a bolt body after the deformation area is heated to enhance the plasticity of the deformation area and rivet pulling force is applied. The fixing base is matched with the fixing base to fix the thin steel plate; by means of the arrangement, a steel plate needing to be fixed is fixed through cooperation between the formed protruding structure and the fixing base, the fastening and anti-loosening effect is achieved, and the technical problems that riveting equipment is too large in size, and construction is difficult in some narrow and small spaces are solved.

A height-adjustable partition wall intended as visual and acoustic protection for workplaces, especially for opposing desks, which can be easily moved at any time on the tabletops (10) or fixed to the rear edge of the tabletops (10), above or, for space reasons, below the lower drive unit with its outer side frames (8) by a clamping device (11), characterized in that the actual visual and acoustic protection mat (1) consists of felt approximately 3 mm thick or of other highly sound-absorbing or opaque or highly fire-resistant material, e.g., sheet steel, but always flexible, in order to be able to wind and unwind it in a space-saving manner onto a winding tube (5) with the smallest possible tube diameter, thereby advantageously increasing or decreasing the height of the partition wall by means of a visual and acoustic protection mat (1).The soundproofing mat (1) is deflected from below via an upper deflection profile (3), then guided in a double-walled manner to a lower deflection profile (4), and thus a differentiated force-active impedant device (6) with sufficient lateral stability and corresponding to each height is advantageously concealed between the now double-walled visual and soundproofing mat (1) to provide the required tension force, i.e., it is permanently articulated between the two deflection profiles (3) and (4) in an impedant-like manner, permanently pressing apart.

The present invention relates to a vehicle body bracket vision inspection system comprising: a steel coil supply unit (10) configured so that a steel coil in the form of a thin sheet wound around a rotary shaft is uncoiled under the control of a driving unit (a steel sheet wound in a coil is uncoiled); a steel sheet press unit (20) configured so that the steel coil inserted between an upper die and a lower die is cut into a quadrilateral steel sheet as the upper die presses down on the steel coil; a steel sheet transfer robot (30) configured to suction the quadrilateral steel sheet, loaded on a quadrilateral steel sheet-loading rack, by using a vacuum suction arm, and then transfer same to a vehicle body bracket press unit; a vehicle body bracket press unit (40) configured so that a vehicle body bracket is shaped as the quadrilateral steel sheet inserted between an upper die and a lower die is pressed downward by the upper die; a vehicle body bracket transfer robot (50) configured to suction and transfer the shaped vehicle body bracket to a vision inspection station after the upper die rises; a vision inspection unit (60) that includes a vision inspection station, a vision camera, a 3D scanner, and a main control unit (MCU), inspects whether shaped vehicle body bracket products are defective, and controls the transfer of products to a loading rack for finished products classified as qualified or unqualified products depending on whether the products pass or fail; and a loading robot (70) that suctions the inspected shaped vehicle body bracket products, receives the inspection results from the vision inspection unit, and transfers the products to the loading rack for finished products classified as qualified or unqualified products.

The invention relates to the technical field of steelmaking deoxidizing agents, in particular to a sheet steel slow-release deoxidizing agent preparation method and a device thereof.The device comprises a conveying base, the top of the conveying base is rotationally connected with a vertical screening barrel, the inner wall of the middle of the screening barrel is provided with a discharging inner barrel, and the interior of the screening barrel is symmetrically and rotationally connected with two sets of screens; a driving mechanism is arranged on the outer wall of the screening cylinder; according to the device, non-stop screening and recycling of materials are effectively achieved, operation is easy, stability and high efficiency are achieved, meanwhile, the opening position of a Y-shaped double-end feeding pipe is matched with a magnetic balance weight ball, it is guaranteed that feeding of the materials is stable, the opening position of the Y-shaped double-end feeding pipe is matched with the rotating position of a screen, and energy loss is avoided; meanwhile, different scraping rods are matched with different parts to achieve different effects, the blockage clearing performance is higher, and the recycling efficiency is higher; and when the screen is blocked, up-down vibration can be applied to the screen, so that the blockage clearing performance of the screen is improved, and the screening and recycling effects of subsequent materials are ensured.

The invention discloses medium-carbon B-containing weather-resistant fragment killed steel and a production process thereof. The weather-resistant fragment killed steel comprises the following chemical components in percentage by mass: 0.45 to 0.65 percent of C, 1.0 to 1.6 percent of Si, 0.8 to 1.6 percent of Mn, 0.08 to 0.12 percent of P, less than or equal to 0.010 percent of S, 0.70 to 0.90 percent of Cr, 0.0010 to 0.0030 percent of B, 0.020 to 0.040 percent of Al, 0.25 to 0.30 percent of Cu, 0.25 to 0.35 percent of Ni and the balance of Fe and inevitable impurities. The production process comprises the steps of electric furnace smelting, LF refining, RH vacuum refining, continuous casting, cogging and blooming, coping, rolling to form a material, slow cooling and coping. The weather-resistant fragment round steel provided by the invention is good in surface quality, high in yield and low in production cost, and the weather-resistant fragment performance of the weather-resistant fragment round steel is superior to that of similar steel types.

The invention discloses an integrated stiffening steel plate wall structure suitable for a shear wall. Comprising a flat steel plate, a frame beam and a frame column, the surface of the flat steel plate is provided with a surface pit or protrusion structure as a surface external stiffening rib, and the flat steel plate is made of a specific steel material; the stiffening rib is specifically of a pit structure or a protruding structure formed by stamping on the surface of the middle of a flat steel plate, and is formed by stamping on an original flat steel plate. The buckling load of the thin steel plate wall can be effectively improved, local deformation of the steel plate wall caused by welding of the stiffening ribs is avoided, the anti-seismic property and ductility of the steel plate wall can be improved, and the steel plate wall has the advantages of being small in welding workload, small in welding deformation, simple in structure, convenient to machine and install and high in ductility and is convenient to apply and popularize in engineering.

The present invention provides a kind of laminated body removal device and laminated body removal method, which is even in the removal process, the thin steel plate in fixed extrusion piece can continue to drop laminated body removal technology.In (a) of Figure 7, the thin steel plate (17) in fixed extrusion piece (42) continues to drop.When the thin steel plate (17 (n)) passes the lower end of the first movable extrusion piece (54), the first movable extrusion piece (54) is closed.In (b) of Figure 7, when the thin steel plate (17 (n)) passes the lower end of the second movable extrusion piece (55), the second movable extrusion piece (55) is closed.In (c) of Figure 7, the laminated body (50) is removed from the support piece (43).During this period, the thin steel plate (17) in fixed extrusion piece (42) and the first movable extrusion piece (54) and the second movable extrusion piece (55) continues to drop.