224 results about "High stress" patented technology

The application discloses a transparent strengthened glass ceramic with high stress depth, which contains spinel crystals and zirconia crystals in a crystal phase of the strengthened glass ceramic, and does not contain Li-containing crystals; the strengthened glass ceramic has a compressive stress region extending from a surface thereof to a compression depth, a compressive stress layer depth DOL_0 of the strengthened glass ceramic is greater than or equal to 14% of a thickness of the strengthened glass ceramic, and a tensile stress line density of the strengthened glass ceramic is greater than or equal to 25000 MPa / mm. By introducing more Li ions and Na ions into a spinel glass ceramic component, the prepared transparent spinel glass ceramic can be chemically strengthened, a transparent strengthened glass ceramic with high CS, DOL_0, CT_AV and CT_LD is obtained, and the strengthened glass ceramic exhibits excellent drop resistance.

The invention discloses a manufacturing method for preventing a single-board guitar panel from recessing, and relates to the technical field of manufacturing for preventing the single-board guitar panel from recessing, and the method comprises the steps: carrying out the finite element stress simulation of a three-dimensional digital model of the single-board guitar panel, and determining a high-stress region in a stress state; according to the distribution characteristics of the high-stress area, generating a structure model of the bionic support network through topological optimization; preparing a lightweight support net with a bionic structure by adopting an additive manufacturing process based on the structure model; the method comprises the following steps: placing a to-be-processed veneer panel on a rigid mold with a preset curved surface, and carrying out plastic pre-deformation on the to-be-processed veneer panel under the action of vacuum negative pressure to obtain a pre-formed panel; a lightweight supporting net is fixed to a high-stress area on the inner side of the preformed panel; the modularized metal framework with preloaded stress is installed at a preset position in the guitar body to form a reverse acting force system which resists the downward sinking of the panel; and carrying out integral curing treatment on the guitar body provided with the supporting net and the metal framework to complete integrated manufacturing.

The application provides a chemically strengthened microcrystalline glass, a cover plate glass, an electronic device and a glass device, and belongs to the technical field of microcrystalline glass. The application makes the surface composition and stress structure of the chemically strengthened microcrystalline glass with lithium disilicate as the main crystal phase meet specific requirements, so that the chemically strengthened microcrystalline glass can meet high stress levels and also ensure good weather resistance, and can better ensure that the chemically strengthened microcrystalline glass meets application requirements.

The invention discloses an MEMS device and a preparation method thereof, and relates to the technical field of semiconductor devices. The MEMS device comprises a substrate layer, a stress matching layer and a doped polycrystalline silicon structure layer which are sequentially stacked from bottom to top, and the preparation method comprises the following steps: forming a sacrificial layer on the substrate layer, patterning the sacrificial layer, and defining anchor regions of the stress matching layer and the doped polycrystalline silicon structure layer; depositing a stress matching layer on the patterned sacrificial layer, wherein the stress matching layer is a silicon nitride-based composite film with stress increased from bottom to top in a gradient manner; depositing a doped polycrystalline silicon structure layer on the stress matching layer; and sequentially carrying out patterning treatment and anchor region annealing treatment on the doped polycrystalline silicon structure layer, and carrying out removal treatment and drying treatment on the sacrificial layer to prepare the MEMS device. The MEMS device prepared by the invention has the characteristics of high stress matching, uniform doping concentration and relatively good process compatibility.

The invention discloses a tensile test device and method based on a pressing-to-pulling mode, and relates to the technical field of tensile tests. A tensile test method of a test piece under high temperature and high stress is realized, and the problems of stress concentration, difficulty in test piece preparation and the like in the existing tensile test are solved. The device comprises an axial loading mechanism, a confining pressure heating mechanism, a data acquisition mechanism and a control module, and the axial loading mechanism is connected with two ends of a test piece and is used for applying an axial load to the test piece; the confining pressure heating mechanism surrounds the periphery of the test piece and is used for applying circumferential pressure to the test piece and heating the test piece; the data acquisition mechanism is used for acquiring tension, temperature and deformation of the test piece under load; the signal output end of the control module is connected with the signal input ends of the axial loading mechanism and the confining pressure heating mechanism, and the control module is used for controlling starting and stopping of the axial loading mechanism and the confining pressure heating mechanism; the signal input end of the control module is connected with the signal output end of the data acquisition mechanism and used for receiving data acquired by the data acquisition mechanism.

This film comprises an elastomer layer (11) on a base material (30), and the elastomer layer has a stress relaxation rate of 70% or more in at least one direction, as calculated using formula 1. [Formula 1] Stress relaxation rate (%) = (A-B) / A×100 Taking at least one direction as a length direction, the elastomer layer is cut to a length of 10 mm and a width of 30 mm to obtain a strip-shaped test piece. The strip-shaped test piece is pulled in the length direction at a tension speed of 200 mm / min in an environment of a temperature of 25°C and a relative humidity of 45% using a tensile tester, and pulling is stopped when an elongation of 50% is reached. The stress value of the elastomer layer is measured continuously from the start of pulling until 30 seconds after extension has stopped. Defining the stress value indicating the highest stress during the measurement time as "A" (N), and the stress value 30 seconds after extension has stopped as "B" (N), the stress relaxation rate (%) of the elastomer layer is calculated on the basis of formula 1.

The utility model provides a concrete filled steel tube arch frame semi-flange connection node structure. The concrete filled steel tube arch frame semi-flange connection node structure structurally comprises a concrete filled steel tube arch frame, a semi-flange plate connection part, a screw rod, a nut, a waterproof layer and CFRP fiber cloth, the half flange plate connecting part is a half flange plate provided with a groove, and the lower half part of the connecting joint of the outer steel pipe is placed in the groove of the half flange plate and is welded with the half flange plate; waterproof layers are laid on the outer side and the periphery of the top of the connecting joint, and the waterproof layers of the connecting joint and the half flange plate connecting part are integrally bundled through CFRP fiber cloth. According to the structure, the problem of stress concentration on the contact surface of a traditional full-flange connection structure and surrounding rock can be effectively solved while the advantages of a traditional flange connection node are reserved. In tunnel engineering under the high-stress surrounding rock condition, the node structure can adapt to the large-deformation working condition of the surrounding rock, and a good choice is provided for supporting design of the concrete-filled steel tube tunnel under the complex geological condition.

The utility model relates to the technical field of buildings, in particular to a module assembly type steel structure combination column and an assembly system, which comprises a steel pipe column, the steel pipe column consists of a plurality of steel frames, the steel frames are L-shaped or U-shaped, and an accommodating space is formed in the steel pipe column; the steel pipe column and the stirrup cage are combined, then the longitudinal load-bearing steel bars are inserted, cement is poured into the steel pipe column, the combined column is formed, and an independent module column of an original horizontal adjacent module is replaced with the combined column, so that the lateral force resistance of the structure can be improved, and the structure has higher stress performance; and the space occupied by the combination of a plurality of module columns is reduced.

The embodiment of the invention discloses a multi-stage collaborative supporting method and structure for an ultra-deep well large-span chamber, and the method comprises the following steps: firstly identifying an overlying key rock stratum and calculating a pressure relief range, carrying out'skylight opening 'excavation on the overlying key rock stratum of the large-span chamber to realize high stress transfer and pressure relief, and releasing pressure for the large-span chamber to be excavated. The cavern is in a low-stress state, and dynamic disasters such as rock burst and the like caused by cavern stress concentration or high-stress cavern large-deformation disasters are reduced; precise excavation is carried out to form a chamber, first-time supporting is carried out, high-pretightening-force yielding anchor cables are applied to a top plate and side parts, and a deep and shallow part cooperative bearing layer is formed through long anchor cables and short anchor cables; and then secondary supporting is carried out, loosening blasting pressure relief is carried out on the base angles, a high-strength concrete-filled steel tube support is erected, and the space between the high-strength concrete-filled steel tube support and the surrounding rock is filled with a yielding back plate. And then grouting anchor cables are constructed at the bottom corners to block stress transfer, and pressure relief drill holes are constructed in the top slope part to regulate and control the surrounding rock stress. And finally, an anti-slide pile is vertically arranged in the center of the bottom plate.

The invention relates to the technical field of ultra-clean HDPE (high-density polyethylene) barrels, and particularly discloses a multi-sealing anti-leakage structure of an ultra-clean HDPE barrel. The upper surface of the barrel body is communicated with a connecting pipe, and the tail end of the connecting pipe is provided with a pressure balancing assembly used for balancing the pressure in the barrel. By means of the arranged pressure balancing assembly, high-pressure gas can push a sealing block to move vertically through a fixing plate on an exhaust part, the gas is exhausted through a gap between the sealing block and the exhaust part and is exhausted to the outside through a through hole in the exhaust part, the automatic pressure relief effect is achieved, and when an adjusting screw is screwed, under the cooperation of a fixing bearing, the sealing block is not prone to falling off. The adjusting part can be driven to move in the vertical direction, the distance between the guide sleeve and the sealing block can be adjusted, then the tension of the compression spring is adjusted, when the pressure of the barrel body is small, the pressure cannot be exhausted through the exhaust part, the sealing block can only be pushed through large pressure, and then automatic pressure relief of different materials can be conveniently achieved.

The utility model relates to the technical field of waterproof rubber jackets, in particular to a high-temperature waterproof rubber jacket with excellent weather resistance, which comprises a rubber jacket body, a mounting hole is formed in the middle of the rubber jacket body in a penetrating manner, a threaded mounting groove is formed in the inner wall of the mounting hole, staggered ribs are arranged on the inner wall of the rubber jacket body, and the threaded mounting groove is communicated with the staggered ribs. The staggered ribs are arranged on the inner wall of the rubber sleeve body in a grid-shaped staggered mode, and the inner walls of the two sides, close to the mounting hole, of the rubber sleeve body are fixedly connected with annular ribs. When the waterproof rubber sleeve is subjected to internal and external pressure, the staggered ribs and the annular ribs arranged in the waterproof rubber sleeve can provide relatively strong supporting force for the interior of the waterproof rubber sleeve, effectively disperse stress, avoid local stress concentration and increase the overall rigidity of the structure, and the reinforcing ribs are used for supporting the connecting part and the high-stress bearing area of the waterproof rubber sleeve, so that the waterproof rubber sleeve is not prone to deformation. The risk of breakage of the waterproof rubber sleeve is reduced, the weather resistance of the waterproof rubber sleeve is improved, the rigidity is improved, and deformation of materials is reduced.

The application provides a heat absorption tower structure system of a tower type photo-thermal power station, which comprises a heat absorber, a concrete cylinder, a vertical cylinder, a steel frame, a reinforcing mechanism, a first connecting mechanism and a second connecting mechanism. The vertical cylinder is arranged in the cavity of the concrete cylinder and partially extends out of the concrete cylinder, the steel frame is arranged above the concrete cylinder and surrounds the outside of the vertical cylinder, and the heat absorber is arranged on the steel frame. The reinforcing mechanism is connected between the concrete cylinder and the steel frame to limit the movement of the steel frame relative to the concrete cylinder, thereby realizing the vertical conversion of the steel-concrete structure. The first connecting mechanism fixedly connects the concrete cylinder and the vertical cylinder to form a rigid horizontal connection of the lower tower body. The second connecting mechanism connects the steel frame and the vertical cylinder and allows the relative horizontal displacement of the two within a preset range. The heat absorption tower structure system has high stress synergy and deformation coordination capability, can reduce the construction cost, and meets the requirements of high reliability, light weight and stable support of the heat absorption tower of the tower type photo-thermal power station.

The invention relates to the field of extrusion dies, and discloses a homogenization-free aluminum bar extrusion die which comprises a die body, a gear ring is rotatably mounted on the die body, a polishing mechanism is fixedly mounted on the gear ring, and the polishing mechanism extrudes an aluminum bar discharged from the die body; a pressurizing mechanism is meshed with the gear ring, controls the grinding mechanism to rotate around the aluminum bar and cleans the grinding position of the grinding mechanism; an adjusting mechanism is fixedly mounted at the top of the pressurizing mechanism, and the adjusting mechanism changes the cleaning angle of the pressurizing mechanism to the aluminum bar in the process that the polishing mechanism rotates around the aluminum bar; the cambered surface polishing block can eliminate tiny protrusions and smooth burrs on the surface of the aluminum bar through flexible extrusion, and damage to a base body due to excessive polishing is avoided; the sharp-corner polishing block effectively removes stubborn protruding flaws by means of the high stress concentration characteristic, and the cleaning effect of the polishing block on the aluminum bar can be controlled by controlling the compression amount of the first spring.

The application discloses a kind of thermoplastic composite continuous forming methods.The system includes successively in the direction of material travel: multiple roll unwinding mechanism, flattening arrangement, continuous mould pressing device and double steel belt presser.Wherein, continuous mould pressing device is made of multiple independent presser module, for applying 5-15MPa high pressure to realize the sufficient impregnation of resin to fiber;Double steel belt presser follows immediately, for applying 1-3MPa low pressure to eliminate surface indentation generated in mould pressing process.The application is by high pressure impregnation and low pressure finishing function clear distinction and collaborative use, overcome the technical contradiction that impregnation quality and surface quality are difficult to obtain in prior art, both ensure the excellent internal impregnation quality of composite material, also obtain high surface flatness, realize the continuous production of high-quality thermoplastic composite plate.

The application discloses an alloy material resistant to acid and alkali corrosion and a preparation method and products thereof, and the alloy material is composed of 20.5-21.0 wt% Cr, 6.0-6.5 wt% Mo, 17.5-18.5 wt% Ni, 0.18-0.22 wt% N, 0.8-1.2 wt% Cu, 0.05-0.1 wt% Ce, ≤0.02 wt% C and the balance of Fe and inevitable impurities. Through multidirectional synergistic design, the core requirements of excellent corrosion resistance, high strength and long service life under strong acid / alkali and high stress working conditions are realized, and the alloy material is particularly suitable for precision ball screw support bearings in harsh environments such as semiconductor cleaning equipment.

The present invention relates to safe strengthened glass with a low-variation-amplitude tensile stress region, a preparation method and an application. The change curve of the compressive stress and tensile stress of the strengthened glass meets a specific function relationship; within the range of 0.45-0.85 mm, the stress distribution meets the following condition: the stress curve is within the following Log-PI function range, the upper limit Fmax of the compressive stress meets the formula (1): Fmax=b+(2*a / PI)*(w / (4*(x−c){circumflex over ( )}2+w{circumflex over ( )}2)), and the lower limit Fmin of the compressive stress meets the formula (2): Fmin=b+(2*a / PI)*(w / (4*(x−c){circumflex over ( )}2+w{circumflex over ( )}2)); or the chemically strengthened glass comprises a first stress region and a second stress region, wherein the stress range of a first subregion in the first stress region includes that the minimum value of the stress difference value of the glass thickness t in the region of 0-10 micrometers is greater than 1 Mpa; and the pressure difference value of the second stress region is smaller than that of the first stress region. The deep compressive stress region of the strengthened glass has relatively high stress, and the tensile stress region has very-low-degree variation amplitude, so that the glass has excellent mechanical strength, very high stability and very high safety.

In one or more embodiments, a chemically strengthened glass-based article includes a first major surface and an opposing second major surface defining a thickness t of the glass article; a stress profile [sigma] (x) extending through the thickness t of the glass article; a first compressive stress layer extending to a first depth DOC1 of greater than about 0.15 t; a second compressive stress layer extending from the second major surface to a second depth of compression DOC2 less than or equal to DOC1; and a central tension zone positioned between the first compressive stress layer and the second compressive stress layer and including a peak tension PT and a tension zone width BTZ spanning DOC1 to tDOC2. In an embodiment, the following criteria are satisfied: wherein DOC = DOC1 and is the slope of the stress profile sigma (x) at DOC; ; and wherein TA is the tension area, defined as follows.

The invention discloses a surface paint spraying device based on constructional engineering channel steel formwork machining, and relates to the technical field of paint spraying equipment, the surface paint spraying device comprises a base, a material bearing mechanism is fixedly mounted at the upper end of the base, and a paint spraying displacement mechanism located on the outer side of the material bearing mechanism is further fixedly mounted at the upper end of the base; a protrusion detection feedback mechanism is fixedly arranged on the lower side of the moving end of the paint spraying displacement mechanism, and protrusions on the surface of the channel steel formwork are detected in advance so as to be prevented from affecting the paint adhesion stability and the paint spraying forming quality. Meanwhile, the moving speed of a paint spraying displacement mechanism can be automatically adjusted based on the surface roughness of the template (the larger the roughness is, the smaller the spraying thickness is, the smoother the surface is, the larger the spraying thickness is), and the paint spraying pressure and distance (the pressure of the high-roughness surface is automatically improved to ensure that paint permeates and sinks, the distance is shortened and the accumulation capacity is enhanced); and the paint spraying quality of the channel steel formwork is effectively guaranteed.

The utility model relates to an anti-seepage mold demolding base. The anti-seepage mold demolding base comprises a lower base body and a supporting piece placed on the lower base body. The supporting piece comprises a plurality of vertically-arranged supporting pipes and connecting rods for connecting the adjacent supporting pipes. The number of the supporting pipes is three. The whole supporting piece is of a regular triangle structure. The supporting pipe is provided with a supporting end surface for supporting the bottom of the test piece sleeve and a limiting lug which is propped against the outer peripheral surface of a mounting convex ring of the test piece sleeve; the limiting protruding piece and the supporting pipe are integrally formed, the limiting protruding piece is an arc-shaped protruding piece, and the two sides of the limiting protruding piece are each provided with an abutting side edge abutting against the installation protruding ring. The pressure machine has the effect of improving the safety of pressing the concrete test block from the test piece sleeve by the pressure machine.

The application belongs to the technical field of metal wear-resistant materials, and particularly relates to a wear-resistant alloy dual-phase steel lining plate for a semi-autogenous mill and a manufacturing method thereof, the manufacturing method comprising molding, smelting, casting and magnetic field assisted targeted heat treatment. The application guarantees uniform proportion of bainite-martensite dual phase by optimizing alloy components, matching air cooling + fog cooling precise temperature control phase change window; the application maximizes purification and refining effect by using rare earth cored wire wire feeding to inhibit burning loss and promote uniform distribution; the application uses strong magnetic field to promote nucleation and weak magnetic field to guide growth, and manufactures dual-phase structure steel lining plate with 45%-55% lath bainite, 40%-50% acicular martensite and 3%-5% residual austenite, the hardness of which reaches HRC50-55, the tensile strength is 1520-1530 MPa, the impact toughness is good, the wear rate is low, the interface bonding strength is greater than or equal to 850 MPa, and the dual-phase structure steel lining plate has high reliability and durability in high stress and high wear environment.

This invention discloses a pressure-induced heating composite material, comprising: a flexible support layer, which is a PI film; a first triboelectric material layer, which is a CNT-OH / PVDF-HFP composite film, attached to one side of the flexible support layer; a second triboelectric material layer, which is an AgNW / PDMS composite film, attached to the other side of the flexible support layer; a pyramidal microstructure is constructed on the surface of the second triboelectric material layer; and a thermoelectric conversion layer, attached to either the first or second triboelectric material layer. The thermoelectric conversion layer is prepared by combining Bi2Te3 / Sb2Te3 heterojunction nanosheets, PEDOT:PSS hydrogel, and Ti3C2TxMXene, with each component being doped with each other to form a uniform dot-like spatial distribution structure. The material of this invention exhibits high response under low pressure because the pyramidal microstructure increases the contact area change rate by 400% under low pressure (≤5kPa) and achieves a charge density of 1.2–1.5 mC / m², breaking through the high-pressure triggering bottleneck of existing materials.

The invention discloses a grid side wall imaging method. The method comprises the steps that a semiconductor structure which has a grid and a first side wall which covers the side wall of the grid is provided; a polycrystalline carbon layer is prepared to cover the surface of the semiconductor structure; the polycrystalline carbon layer is partially removed, so that a second side wall of the grid is formed on the surface of the first side wall; after a source drain implantation process is carried out on the semiconductor structure, the second side wall is removed; and a source drain annealing technology is continued. According to the grid side wall imaging method provided by the invention, through oxygenated plasma treatment, a polycrystalline carbon side wall which is used as a main side wall can be neatly removed; without using an SPT process which needs to be carried out in a specific etching cavity, the problem of void in a high stress through hole etching stop layer process can be solved; a process flow is simplified; and the production cost is reduced.

The invention relates to the technical field of channel steel welding, and discloses hot-rolled channel steel butt welding equipment and a welding process thereof.The hot-rolled channel steel butt welding equipment comprises an operation table, and an adjusting roller and a rotating disc are rotationally installed on a welding station of the operation table. Through precise cooperation of the combined grooves of the adjusting rollers, the spot welding gun stably moves downwards to a welding station along a precise track, the problems of welding spot deviation, welding skips and the like caused by positioning deviation are effectively avoided, meanwhile, based on the innovative design of gear meshing transmission and the vortex-shaped linear guide rail, after one-time spot welding is completed, the welding efficiency is greatly improved, and the welding quality is improved. The spot welding gun can be accurately driven to be switched to the next station in order, seamless connection of the spot welding process is ensured, and the welding period is greatly shortened; besides, due to the special self-adaptive encryption spot welding function of the equipment, the spot welding distance can be automatically adjusted in a high-stress area in the center of a welding seam according to the stress distribution characteristic of channel steel, the welding spot density is increased, the mechanical property of a welding structure is optimized in a targeted mode, the anti-fatigue capacity and the bearing strength of a welding joint are effectively improved, and the high-strength application requirement of engineering is fully met.

This invention relates to the field of butterfly head manufacturing technology, specifically to a butterfly head that is easy to process and has controllable precision, and its stamping and forming method. The head includes a body, a reinforcing rib layer disposed at the bottom of the body, a connecting component disposed at the bottom of the body, and a sealing element disposed at the bottom of the connecting component. The butterfly head structure of this invention is relatively simple, easy to process and manufacture, and can improve production efficiency. Adding a reinforcing rib layer to the settling groove of the body blank can increase the strength and rigidity of the product. Using aluminum-nickel alloy, aluminum-copper alloy, and aluminum-silicon alloy powders for hot pressing sintering gives the reinforcing rib layer good mechanical properties and corrosion resistance, which enables the butterfly head to have high stress resistance and better withstand external pressure and force loading.

The invention relates to the technical field of self-repairing wear-resistant materials, and particularly discloses a self-repairing wear-resistant material and application of the self-repairing wear-resistant material to a wind power generation gearbox. The self-repairing wear-resistant material is prepared from the following components in parts by mass: 20 to 30 parts of hydroxyl magnesium silicate, 5 to 10 parts of tetraisopropyl titanate, 3 to 6 parts of metal oxide, 1 to 3 parts of metal simple substance, 0.1 to 0.5 part of boron and 0.05 to 0.3 part of rare earth oxide. The metal elementary substance is a non-rare earth metal. Metal elements in the metal oxide are non-rare earth metals. When the self-repairing wear-resistant material is applied, instant flash temperature can be generated on a friction surface, and the hydroxyl magnesium silicate, the metal oxide and the metal elementary substance are promoted to be sintered and subjected to micro-metallurgy under the action of the tetraisopropyl titanate, the rare earth oxide and the boron, so that a layer of metal ceramic repairing film is formed, the friction surface is repaired, the friction coefficient is reduced, and the friction energy consumption is reduced. The ceramic membrane has good high-temperature resistance and oxidation resistance, and has good reliability in high-temperature and high-stress environments.

The invention discloses an acid and alkali corrosion resistant alloy material as well as a preparation method and a product thereof. The alloy material consists of 20.5 to 21.0 weight percent of Cr, 6.0 to 6.5 weight percent of Mo, 17.5 to 18.5 weight percent of Ni, 0.18 to 0.22 weight percent of N, 0.8 to 1.2 weight percent of Cu, 0.05 to 0.1 weight percent of Ce, less than or equal to 0.02 weight percent of C and the balance of Fe and inevitable impurities. According to the precise ball screw supporting bearing, through multi-azimuth collaborative design, the core requirements of excellent corrosion resistance, high strength and long service life under the working conditions of strong acid / alkali and high stress are met, and the precise ball screw supporting bearing is particularly suitable for semiconductor cleaning equipment and other severe environments.

The application discloses a load-bearing wall structure optimization design method based on parameterized modeling and belongs to the technical field of building structure design optimization. The method comprises the following steps: obtaining geometric boundary parameters, material attribute parameters and connecting node parameters of a load-bearing wall, and generating an initial wall parameter set; constructing a multiscale initial grid model comprising macroscopic scale grids and microscopic scale grids; applying a load boundary condition to perform nonlinear iterative solving to obtain a wall stress redistribution trajectory; identifying a high stress gradient area according to the stress redistribution trajectory, performing reverse correction on the initial wall parameter set by using regional local parameters and iteratively converging to generate an optimized wall parameter set. The method can accurately simulate local stress concentration at the connecting node, realize adaptive parameter optimization based on a stress transmission path, and improve design efficiency and structural economy.

The invention belongs to the field of metal materials, and provides a wide and thick steel plate for a 500MPa-grade anti-fatigue corrosion-resistant deep sea subsea pipeline and a production method of the wide and thick steel plate, in the components, the design of low C, Mn and Al is adopted, elements such as Mg, Ce and Ca are used for compositely regulating and controlling inclusions, by compositely adding Nb and V, controlling N and reducing the content of Ti and Al, Nb and V are promoted to play the roles of microalloy solid solution, precipitation, fine grain and the like, and the steel plate can be used for manufacturing the deep sea subsea pipeline. The fatigue life of the steel plate produced by using the steel plate is greater than or equal to 2 * 106 times under high stress, and the fatigue stress amplitude is 30kpsi; the CTOD is greater than or equal to 0.6 mm at-45 DEG C, the HIC corrosion resistance is qualified after being corroded by a NACE standard A solution for 96 hours, and the SSCC corrosion resistance is qualified after being soaked in a saturated H2S solution for 720 hours under a 90% stress loading condition and is free of visual cracks under 10-time magnification observation; and the complex and harsh service requirements of the deep sea subsea pipeline steel are met.

The invention discloses a cold pressing method for reducing residual stress of a rib plate type forge piece, which belongs to the technical field of forge piece residual stress control and comprises the following steps of: a, determining a high stress concentration area of quenching residual stress of the forge piece; b, at the normal temperature, a load is applied to the high stress concentration area of the quenching residual stress of the forge piece through a cold pressing die, so that the high stress concentration area of the quenching residual stress of the forge piece generates elastic or plastic deformation, and the residual stress is reduced and redistributed; and c, keeping the cold pressing die not in contact with other areas of the forge piece. According to the method, the structure of the forge piece and the distribution characteristics of the initial quenching residual stress are combined, the residual stress can be efficiently reduced by applying the load to the high stress concentration area of the quenching residual stress of the forge piece to generate elastic or plastic deformation, and low-value uniform distribution of the residual stress is realized.