73 results about "Plastic energy" patented technology

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2200MPa-grade bridge cable and a manufacturing method of the high-strength complex-phase hot-rolled wire rod. After C-Si-Mn-Cr chemical components are rolled and spun into a wire rod, the wire rod is subjected to online molten salt critical quenching isothermal treatment, the wire rod is controlled to be subjected to front-section treatment and cooled at a cooling speed of greater than or equal to 38 DEG C / s, and enters a pearlite and martensite mixed phase region from an austenite state; the method comprises the following steps: firstly, carrying out heat treatment on austenite to promote transformation of part of austenite to sorbite and martensite, then carrying out post-treatment, reducing the circulation volume of molten salt, promoting transformation of austenite to pearlite, carrying out isothermal tempering, and finally carrying out roller way slow cooling, so as to prepare a hot-rolled wire rod of which the microstructure comprises a complex phase structure consisting of tempered pearlite, tempered sorbite, ferrite and tempered martensite, the composition system can be simplified, the deteriorated structure can be effectively controlled, complex-phase structure regulation and control and high-strength plastic performance matching are achieved, the tensile strength is 1568-1603 MPa, the percentage reduction of area is 29%-34%, and stable manufacturing of the bridge cable is facilitated.

The invention relates to a hot-rolled wire rod for a 2060MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod. Mn-Cr high-carbon chemical component design and rolling spinning are performed to form a wire rod, then online molten salt isothermal phase change treatment is performed, the wire rod is firstly subjected to front-section molten salt treatment and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure, and then the wire rod is subjected to rear-section molten salt treatment, so that the hot-rolled wire rod is obtained. The method comprises the following steps of: firstly, carrying out heat treatment on the residual austenite, promoting the unconverted residual austenite to be converted into a sorbite structure, simultaneously promoting isothermal tempering of the structure and fusing of a part of sorbite lamellas, and finally, slowly cooling through a roller way to prepare a hot-rolled wire rod of which a microscopic structure comprises a mixed structure consisting of tempered sorbite, tempered ferrite and fused sorbite, so that the material cost can be controlled; the high-strength and high-plasticity performance matching of the wire rod is improved, the tensile strength is 1370-1420 MPa, the percentage reduction of area is 35%-40%, and the mechanical property fluctuation is reduced, so that the wire breaking risk in stranded wire production is reduced, and efficient and stable production is promoted.

The invention relates to a hot-rolled wire rod for a 2400 MPa bridge cable and a manufacturing method of the hot-rolled wire rod, after high-carbon components of Cr-Mo-V are rolled and spun into a wire rod, the wire rod is subjected to online molten salt rapid cooling isothermal treatment, so that the wire rod is cooled at the cooling speed of more than or equal to 32 DEG C / s and enters a sorbite phase region from an austenite state to form a structure taking sorbite as a main part, and precipitation and growth of carbides are controlled; and finally, roller way slow cooling is conducted, the hot-rolled wire rod with the microscopic structure comprising a mixed structure composed of tempered sorbite, ferrite and fused pearlite is prepared, the strength and plasticity matching performance of the wire rod can be improved, the mechanical property fluctuation can be reduced, the tensile strength can reach 1640-1680 MPa, the percentage reduction of area can reach 27%-32%, the mechanical property same-circle difference is smaller than or equal to 45 MPa, and the tensile strength of the wire rod can reach 1640-1680 MPa, the percentage reduction of area can reach 27%-32%, and the mechanical property same-circle difference is smaller than or equal to 45 MPa. And rapid and stable production is facilitated, the method is used for manufacturing the 2400 MPa bridge cable, and the wire breaking risk can be reduced easily.

The invention relates to a 1300 MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, after a Cr-Nb-V medium carbon component design is adopted for rolling and spinning to form a wire rod, the wire rod is subjected to online molten salt micro-quenching tempering treatment, the wire rod is controlled to enter a lower bainite phase region from a high-temperature austenite state at a cooling speed greater than or equal to 31 DEG C / s, and a quenching structure mainly comprising quenching bainite is formed; the steel wire rod with a microscopic structure comprising tempered bainite and ferrite is prepared by carrying out isothermal tempering and toughening destressing treatment on a quenched structure and finally carrying out roller way slow cooling, so that the material cost can be properly controlled, the strength and plasticity matching of the steel wire rod is improved, the tensile strength is 1255-1305MPa, and the percentage reduction of area is 58-63%, so that the steel wire rod can be directly processed into a part after being subjected to cold processing molding, and the service life of the steel wire rod is prolonged. And tool steel production energy consumption, cost reduction and efficiency improvement are facilitated.

The invention relates to a low-carbon high-plasticity hot-rolled wire rod for a 1860MPa-grade stranded wire and a manufacturing method of the low-carbon high-plasticity hot-rolled wire rod. C-Si-Mn-Cr components are subjected to hot-rolled spinning to form a wire rod, and then the wire rod is subjected to online molten salt isothermal treatment, so that the wire rod is cooled at a cooling speed of greater than or equal to 34 DEG C / s and enters a sorbite phase region from an austenite state to form a structure taking sorbite as a main part, and isothermal tempering is carried out, so that the low-carbon high-plasticity hot-rolled wire rod is obtained. And finally, slow cooling is conducted through a roller way, the hot-rolled wire rod with the microstructure comprising not less than 89% of tempered sorbite and the balance of tempered ferrite and microspheroidized carbide is prepared, the carbon content can be reduced, the material cost can be further reduced, the export tax refund requirement can be met, the abnormal structure precipitation risk is effectively reduced, and the structure uniformity is improved. According to the method, the strength of the steel wire rod is matched with the high plasticity, the tensile strength is 1190-1240 MPa, the percentage reduction of area is 49%-54%, and the yield and the use performance of the 1860 MPa grade steel strand can be improved.

The invention relates to the field of buffering energy absorption structures, in particular to a repeatable energy absorption structure formed by compounding an elastic material and an elastic plastic material, which comprises an energy absorption unit made of the elastic plastic material, the supporting unit is made of an elastic material; the supporting units are arranged between the energy absorption units and used for providing anti-deformation force when the energy absorption units absorb energy and providing restoring force after the energy absorption units absorb the energy. The elastic material is filled with the elastic plastic material, so that the area of a hysteretic loop of a force-displacement curve can be increased on the premise that the recovery rate is not reduced. Compared with a traditional repeatable energy absorption structure for increasing the hysteretic loop area through the friction effect, the elastic material and elastoplastic material composite structure increases the hysteretic loop area through the plasticity generated by repeated deformation of the elastoplastic material. The energy absorption structure can achieve repeated energy absorption, and the problem that most of existing energy absorption structures made of elastoplastic materials cannot achieve repeated energy absorption is solved.

The invention discloses a high-strength and high-plasticity medium alloy steel material and a high-entropy and high-plasticizing method thereof, and belongs to the technical field of alloy steel preparation. Carbon steel alloy particles and cobalt-nickel-tungsten-molybdenum high-entropy alloy particles are used as raw materials, two-step smelting is carried out, homogeneous heat treatment is carried out, multiple cold rolling and heat treatment are carried out, and the high-strength and high-plasticity medium alloy steel material is obtained. And finally, the high-strength plastic medium alloy steel material is obtained. The method has the advantages of high component control precision, high process stability and high repeatability, and can realize the high-strength and high-plasticity performance of the medium alloy steel material. According to the medium alloy steel material prepared through the method, the high-entropy alloy serves as a reinforcing phase, the tensile yield strength is larger than or equal to 1.1 GPa, the tensile strength is larger than or equal to 1.3 GPa, the tensile deformation rate is larger than or equal to 37%, and the tensile yield strength at the temperature of 600 DEG C is larger than or equal to 750 MPa.

The vertical shaft derrick plastic energy dissipation protection beam structure disclosed by the application comprises a plastic energy dissipation component, a support component is fixed to the upper side of the plastic energy dissipation component through a plurality of bolts, a soft steel energy dissipation support is fixed to the two sides of the support component, the other sides of the two soft steel energy dissipation supports are fixed to steel columns, a plurality of buffer supports are further arranged, the buffer supports are fixed to the lower side of a steel beam, the steel beam is arranged above the support component, and the buffer supports correspond to the support component. The energy dissipation protection beam has the advantages of simple structure, convenient installation, wide application in the technical field of impact resistance protection in civil engineering and mechanical engineering, effective absorption and dissipation of impact energy, cooperation of multiple dissipation components and protection components, greatly improved energy dissipation capacity of the protection component, easy installation and replacement of the plastic energy dissipation components, low cost, and high protection efficiency.

The invention belongs to the technical field of aluminum alloy material processing, and discloses a cryogenic treatment process of a 7xxx series high-strength aluminum alloy pipe, the process sequentially comprises three core steps of solution treatment, cryogenic treatment and aging treatment, and the 7xxx series high-strength aluminum alloy pipe is obtained by accurately controlling key parameters of each step. The technical problems that in a traditional T6 heat treatment process, a 7xxx series aluminum alloy pipe is uneven in precipitated phase distribution, grain refinement is insufficient, the strength and plasticity are difficult to consider, and internal stress is large are solved. After being treated by the process, the tensile strength of the pipe is improved to 705MPa, the yield strength is improved to 678MPa, the ductility is improved to 11.8%, the size of a precipitated phase in a microstructure is smaller, distribution is more uniform, the internal stress is remarkably reduced, the size stability is greatly improved, industrial batch production can be realized, and the requirements of the fields of aerospace, rail transit and the like on the high-performance aluminum alloy pipe are met.

The invention discloses an anti-buckling steel plate shear wall restrained by string anti-bending components, which comprises an edge frame, a fishplate welded on the frame, an embedded steel plate fixed on the fishplate and the string anti-bending restraining components, and the restraining components are symmetrically arranged on the front side and the back side of the embedded steel plate. The supporting structure is composed of inhaul cable supports, constraint angle steel, inhaul cable supporting rods and pre-tensioning inhaul cables, out-of-plane buckling of a steel plate is limited through cooperative stress, and the lateral bearing capacity and the anti-seismic property are improved. The design of the slotted holes in the constraint component allows limited slippage in an earthquake, and a multi-stage anti-seismic mechanism is formed by combining elastic constraint of the inhaul cables and plastic energy dissipation of the steel plates. The lightweight design reduces the steel consumption, the prefabricated components are convenient to transport and rapidly install on site, the post-earthquake damage is concentrated on the replaceable steel plate, and the maintenance cost is low. The structure has the advantages of high rigidity, high energy consumption, convenience in assembly and environmental friendliness, and is suitable for high-rise buildings and high-intensity anti-seismic area projects.

The invention relates to the technical field of memristors, in particular to a composite material memristor and a preparation method thereof, specifically, an FTO glass substrate is sequentially coated with a polyvinyl alcohol and Ti3C2Tx composite material thin film and a zirconium oxide thin film, and then a silver top electrode is deposited on the zirconium oxide thin film to form a four-layer vertical structure. The method is specially designed for a neuromorphic computing system so as to simulate the plasticity of biological synapses. Tests prove that the voltage amplitude modulation precision reaches up to 0.1 V, accurate control over the synaptic weight is ensured, meanwhile, high plasticity is shown, rapid learning and adaptation to changing input conditions can be achieved, the excellent retention characteristic of more than 5 * 104 seconds and the reliability of more than 200 IV scanning cycles are achieved, and the method is suitable for large-scale popularization and application. The memristor solves the problems that when an existing memristor simulates a biological synaptic function, the voltage modulation precision, plasticity and long-term stability are not enough.

The invention discloses a sodium silicate flame retardant and a preparation method thereof, and relates to the technical field of flame retardants, the preparation method of the sodium silicate flame retardant comprises the following steps: adding an organic solvent and sodium silicate into a reaction container, adding 1, 3, 5-tris [3-(trimethoxysilyl) propyl]-1, 3, 5-triazine-2, 4, 6 (1H, 3H, 5H)-triketone after the sodium silicate is uniformly dispersed, and stirring for 1-2 hours; heating to a reflux state, carrying out a heat preservation reaction in the reflux state, filtering a reaction solution after the reaction is finished, and carrying out vacuum drying on filter residues to obtain a sodium silicate flame retardant; the sodium silicate is subjected to surface modification, on one hand, the original flame retardant property of the sodium silicate can be efficiently utilized, and on the other hand, the sodium silicate can be endowed with certain plasticizing property, so that the sodium silicate has the dual effects of flame retardance and plasticizing, and the market competitiveness of the sodium silicate is improved.

The utility model relates to the field of inspection wells, in particular to an SMC (Sheet Molding Compound) glass fiber reinforced plastic energy dissipation well, which comprises a well seat, a shaft inserted at the top of the well seat, a water inlet arranged on one side of the shaft, a support ring fixedly arranged below the water inlet in the shaft, and a water falling grate mechanism arranged at the top of the support ring, a water receiving platform is fixedly installed on the side, close to the water inlet, of the top end of the water falling grate, an energy dissipation mechanism is in threaded connection with the top of the water receiving platform, and a water guide mechanism is vertically and upwards arranged on the side, close to the water inlet, of the top end of the water falling grate. In the utility model, the water flow at the water inlet is guided to the water falling grate mechanism through the water guide mechanism, and the water falling grate, the energy dissipation mechanism and the water receiving platform play a role in buffering and energy dissipation in the shaft, so that the water flow entering the shaft is prevented from directly impacting the bottom or the side wall of the well seat to generate noise; the water flow speed is dispersed and slowed down through the goose soft stone group and the water falling grate, and the water flow noise is reduced.

The invention relates to the field of metal material magnesium alloys, in particular to a preparation method of a high-plasticity magnesium alloy and a product thereof. The second phase of the grain boundary is controlled to be a quasi-crystal phase by regulating and controlling alloy components, and the preferred growth orientation surface of the magnesium alloy is regulated and controlled to be a conical surface through directional solidification, and the growth orientation is that grains are typical columnar crystals; the size and distribution of the second phase are adjusted by changing the growth speed, and segregation of the second phase in the crystal is reduced. And finally, the quasicrystal second phase is dispersed and distributed in the crystal by regulating and controlling the temperature and time of heat treatment. In this way, the high-plasticity magnesium alloy is successfully prepared, and the yield strength of the high-plasticity magnesium alloy ranges from 170 MPa to 200 MPa; the tensile strength is 180 to 212MPa, the plasticity reaches 31.0 to 42.2 percent, and the product of strength and elongation is 5580 to 8947MPa.%.

The present application relates to the technical field of aluminum alloy cast bar production, and particularly relates to an aluminum alloy cast bar production process based on micro-tube production, which solves the problem of simple refining process of molten aluminum in the prior art, reduces the plasticity and uniformity of the subsequent formed cast bar, and through the refining link, a composite refining system containing nano-Al2O3, carbon nanotubes and nano-TiB2 is innovatively adopted, combined with ultrasonic assisted slagging, nucleation is strengthened; during casting, three-stage composite cooling and titanium boron wire grain refinement are used to control the grain size to 50-100 mu m, significantly improve the uniformity; scientific homogenization treatment releases residual stress, improves the elongation of the cast bar and improves its subsequent plasticity; the cast bar is adapted to the high-precision extrusion demand of the micro-tube, is significantly superior to the traditional process, provides reliable blank for the stable production of high-precision micro-tube, and has extremely strong industrial application value.

The invention relates to a hot-rolled V-containing high-strength wire rod for 1860MPa bridge cables and a manufacturing method thereof. After rolling and spinning into a wire rod using a hypereutectoid component system of C‑Si‑Mn‑Cr‑V, the wire rod is subjected to an online molten salt isothermal weak tempering treatment, so that the wire rod first passes through a front-stage molten salt and is cooled at a cooling rate of ≥35°C / s, enters a sorbite phase region from an austenite state, and forms a structure mainly composed of sorbite. Then, the wire rod is heated through a rear-stage molten salt to promote isothermal tempering of the structure and melting of the sorbite lamellae. Finally, the wire rod is slowly cooled through a roller to form a mixed structure mainly composed of tempered sorbite and the rest of which is composed of ferrite and melted sorbite. The problems of network carbides and hard and brittle structures are improved, and the structure uniformity and strength-plasticity matching of large-size wire rods are improved. The tensile strength is 1340-1390MPa, and the cross-sectional shrinkage is 38%-43%. The wire rod can be used for manufacturing 1860MPa bridge cables and meets the requirements of wire making and torsion.

The application belongs to the technical field of structural engineering and relates to a damage deformation controllable composite column-concrete beam fabricated node and a mounting method, which comprises a steel pipe concrete composite column, a prefabricated concrete beam and a self-resetting energy dissipation structure. The surface of the composite column is provided with a connecting plate and a second hinged plate, and the end of the prefabricated concrete beam is provided with an H-shaped steel and a second hinged plate, which are hinged through a pin shaft. A friction energy dissipation component is arranged between the first and second hinged plates and is used for friction energy dissipation under small earthquakes. The two ends of a plastic energy dissipation plate and a super-elastic reset plate are respectively detachably connected with the connecting plate and the H-shaped steel and are respectively used for plastic energy dissipation under medium earthquakes and super-elastic reset after earthquakes. The node is cooperated with multi-stage energy dissipation and self-resetting, realizes no damage under small earthquakes, repairable under medium earthquakes and no collapse under large earthquakes, is easy to replace after earthquakes and is suitable for high-intensity region fabricated buildings.

The invention relates to a 1350MPa-grade high-strength tool steel wire rod and a manufacturing method thereof.The method includes the steps that after medium-high carbon chemical components of high Mn-Cr-V are designed, rolled and spun into a wire rod, the wire rod is subjected to online molten salt mixing quenching isothermal treatment, the wire rod is controlled to enter a sorbite phase region from a high-temperature austenite state at the cooling speed larger than or equal to 30 DEG C / s firstly, and then the wire rod is subjected to hot rolling treatment at the cooling speed larger than or equal to 30 DEG C / s; the method comprises the following steps: quenching a steel wire rod to form a quenched structure mainly comprising sorbite and retained austenite, carrying out isothermal tempering on the quenched structure to convert the retained austenite into martensite, toughening and destressing, and carrying out roller way slow cooling to prepare the steel wire rod with a microscopic structure comprising isothermal sorbite, tempered martensite and ferrite, so that the strength and plasticity matching of the steel wire rod can be improved, and the service life of the steel wire rod is prolonged. The tensile strength can reach 1230-1380 MPa, the percentage reduction of area is 36%-41%, the steel can be directly machined into parts after cold machining forming, and production energy consumption and cost reduction and efficiency improvement of the tool steel are facilitated.

The utility model discloses an aluminum-clad plastic energy-saving door and window magnetic attraction structure, and relates to the technical field of building doors and windows, the aluminum-clad plastic energy-saving door and window magnetic attraction structure comprises a frame profile and a sash profile, a fixed seat is fixedly connected to the position, close to the bottom, of the middle of the left side of the sash profile, and a frame magnetic mechanism is fixedly connected to the position, close to the right side, of the middle of the upper side of the frame profile in a sleeved mode. Buffer mechanisms are fixedly connected to the sides, close to each other, of the frame magnetic mechanism and the fixing seat, the frame magnetic mechanism comprises a frame magnetic attraction seat, the outer side of the frame magnetic attraction seat is fixedly connected to the position, close to the right side, of the middle of the upper side of the sash profile in a sleeving mode through screws, and an extension wall is fixedly connected to the position, close to the edge, of the right side of the frame magnetic attraction seat. According to the aluminum-coated plastic energy-saving door and window magnetic attraction structure, the upper side of the screw is limited through shielding of the sliding plate, so that the screw cannot move upwards, friction between the screw and a sash profile is avoided, and parts are protected.

The invention provides a projectile impact resistant titanium alloy plate and a preparation method and application thereof, and relates to the technical field of high-strength steel for armor protection, and the projectile impact resistant titanium alloy plate is formed by hot rolling compounding and heat treatment of at least one high-strength titanium alloy base plate and at least one energy-absorbing titanium alloy base plate, the high-strength titanium alloy base plates and the energy-absorbing titanium alloy base plates are alternately stacked; the high-strength titanium alloy base plate on the outermost side is a projectile body impact surface of the projectile body impact resistant titanium alloy plate; the thickness ratio of the high-strength titanium alloy substrate to the energy-absorbing titanium alloy substrate adjacent to the high-strength titanium alloy substrate to the energy-absorbing titanium alloy substrate is 1: (1-20); the impedance ratio of the high-strength titanium alloy substrate to the energy-absorbing titanium alloy substrate adjacent to the high-strength titanium alloy substrate to the energy-absorbing titanium alloy substrate is (1.025-1.25): 1. By compounding two materials with different impedances, controllable unloading of incident stress is achieved, peak stress is reduced through plastic energy absorption of the back plate, crack initiation is inhibited, and BFS is reduced.

The utility model provides a metal anti-falling beam buffer chain, which relates to the technical field of buffer chains, and comprises a buffer chain assembly and two embedded parts respectively connected with a pier and a beam body, the buffer chain assembly comprises an iron chain, a limit cap, a buffer rod, a disc spring and a steel cylinder, the buffer rod penetrates into the steel cylinder A and then penetrates into the disc spring, and the steel cylinder A is fixedly connected with the buffer rod. After the limiting block is screwed on the buffer rod, the buffer rod and the limiting cap B, the limiting cap A and the steel cylinder A, and the steel cylinder B and the steel cylinder A are connected into a whole through threads, the surface of the buffer rod is in sliding connection with the inner wall of the steel cylinder A, and the surface of the buffer rod is in sliding connection with the inner wall of the steel cylinder B. One end of the disc spring is fixedly connected with the inner wall of the steel cylinder A, and the other end of the disc spring is fixedly connected with the other end of the disc spring. According to the buffering chain, multi-stage fortification is adopted to prevent beam falling, all parts are made of metal materials, durability is good, elastic energy dissipation of the disc spring is achieved in the first stage, metal plastic energy dissipation is achieved in the second stage, rigid limiting is achieved in the third stage, and the disc spring is reset after an earthquake.

The invention belongs to the technical field of metal materials, and relates to a low-cost high-toughness corrosion-resistant casting medium-entropy alloy, the chemical formula of the alloy is FexCrNiAl < 0.37 > Ti < 0.37 >, and the value range of x is 3-6. The material is prepared through the processes of burdening, smelting, remelting, cooling curing and the like. The medium-entropy alloy provided by the invention has higher strength and better plasticity, and can meet the use requirements under complex stress conditions. And the stainless steel has excellent corrosion resistance, can show corrosion resistance comparable with that of stainless steel, and is suitable for corrosive environments such as ocean and chemical engineering. In addition, a complicated heat treatment process is not needed for secondary treatment, so that the operation steps are simplified, and the cost is reduced. And on the premise of ensuring the performance, a large amount of Fe element with relatively low price is used, so that the raw material cost of the alloy is greatly reduced, and popularization and application in the industrial field are facilitated.

The application relates to a light-weight capture and impact-reducing device suitable for an ultra-large bearing explosive bolt, which solves the problem of strong impact during capture and belongs to the technical field of spacecraft structures. The light-weight capture and impact-reducing device adopts a multi-configuration lattice structure and a special-shaped rubber pad, combines the viscoelastic deformation characteristics of rubber and the plastic energy-absorbing characteristics of a negative Poisson's ratio lattice energy-absorbing material, and realizes the capture and buffer impact reduction of a high-speed separated bolt body. The device has the advantages of good buffer effect, strong installation adaptability, light structure weight and the like.

The invention discloses a 6-series aluminum alloy thin-wall multi-cavity profile for a vehicle and a preparation method of the 6-series aluminum alloy thin-wall multi-cavity profile. The aluminum alloy profile comprises the following components in percentage by weight: 0.55-0.6% of Si; 0.10% to 0.15% of Fe; 0.20% to 0.25% of Cu; mn < = 0.1%; mg: 0.52 to 0.57%; less than or equal to 0.05% of Cr; the aluminum profile is prepared by the following steps of: smelting and casting, homogenizing treatment, extrusion, heat treatment and the like in sequence, so that the prepared aluminum profile has high strength and high plasticity, meets higher requirements of automobile thin-wall multi-cavity profiles, such as battery pack profiles and the like on mechanical properties and sizes, and avoids the technical problem of cracking.

The present invention relates to a high temperature resistant metal sealing gasket processing technology, comprising the following steps: step 1, pre-treating a metal gasket substrate; step 2, coating the prepared high temperature resistant rubber coating on the surface of the pre-treated metal gasket substrate; step 3, placing the coated metal gasket substrate in a vulcanization device for vulcanization treatment, and then drying and cooling. The present invention prepares a high temperature resistant metal sealing gasket, using a gasket made of a metal material as a substrate, and then coating a layer of high temperature resistant rubber coating on its surface, so that it can have a certain plasticity under the condition of having a high strength, and can fit the microscopic unevenness on the sealing surface to ensure the effectiveness of the seal.

This invention relates to a graded yielding energy dissipation connection device and its design method. The graded yielding energy dissipation connection device includes a fixed support, an upper beam, a lower beam, two steel columns, and a graded yielding energy dissipation device. The graded yielding energy dissipation device includes an X-shaped bending energy dissipation plate and an annular energy dissipation component. The annular energy dissipation component includes two sets of oppositely arranged round-end energy dissipation sections. Each round-end energy dissipation section includes an arc segment and a straight segment. An end plate is provided on the outer side of the straight segment, and the straight segment is connected to the end plate by high-strength bolts. The X-shaped bending energy dissipation plate is connected to the inner side of the two straight segments respectively, and its width changes linearly from the middle to both ends. Under minor earthquakes, the X-shaped bending energy dissipation plate dissipates energy by generating plastic deformation through out-of-plane bending. Under moderate earthquakes, the annular energy dissipation component dissipates energy by generating plastic deformation of the round-end energy dissipation section through the vertical displacement of the end plates on both sides. Under major earthquakes, the X-shaped bending energy dissipation plate and the annular energy dissipation component yield together and enter into plastic energy dissipation.

The invention relates to the technical field of bridge engineering, and discloses a bridge bent frame pier-straining beam node with a compressible bending steel plate, which is arranged at the intersection of a pier column and a straining beam and comprises a weakening straining beam positioned at the straining beam towards the connecting end of the pier column, and the section height of the weakening straining beam is smaller than that of the straining beam; the compressible bending steel plate assemblies are located on the upper side and the lower side of the weakening straining beam, and the buckling-restrained cover plate assemblies correspondingly clamp the bending steel plate assemblies on the upper side and the lower side respectively. The two ends of the bent steel plate assemblies on the upper side and the lower side are fixedly connected with pier columns and straining beams correspondingly. The bent steel plate assembly has the characteristic of secondary yield when being pulled and pressed; the bent steel plate assembly has the advantages of being weak first and then strong and large in deformability, the bent frame pier can form a strong-column and weak-beam failure mode under the earthquake action in cooperation with weakening of the small rigidity of the cross section of the straining beam, and the occurrence position of a damaged plastic hinge is controlled to be located at a plastic energy dissipation node.

The invention discloses high-strength medium-chromium ferritic stainless steel which comprises the following chemical components in percentage by weight: less than or equal to 0.02% of C, less than or equal to 0.2% of Si, less than or equal to 0.2% of Mn, less than or equal to 0.04% of P, less than or equal to 0.01% of S, 18.0-20.0% of Cr, 0.4-0.6% of Cu, 0.4-0.6% of Nb, less than or equal to 0.02% of N, 0.3-0.5% of W and the balance of Fe and inevitable impurity elements. The product obtained through component design has high strength and excellent plasticity in performance, and can meet the high-end requirements of the product industry.

The application discloses a kind of corrosion-resistant high plasticity titanium alloy foil for wide bipolar plate and its industrialized preparation method, in view of the high requirements of fuel cell bipolar plate to conductivity and corrosion resistance, using Ni, Nb, Cu micro-alloying design, improve the corrosion resistance and plasticity of material;Adopting three vacuum self-consumption smelting method, guarantee titanium alloy ingot composition uniformity, through hot rolling, cold rolling, degreasing pickling, annealing and other processes, obtain 0.08~0.15mm thickness specification titanium alloy foil.The titanium alloy foil has excellent seawater corrosion resistance and plasticity, can meet the forming requirement of processing thickness ≥0.08mm, and can adapt to the service environment of hydrogen fuel cell bipolar plate, can replace the stainless steel substrate used in the present stage bipolar plate, achieve the effect of weight reduction, improve the corrosion resistance of substrate, thereby greatly prolong the service life of battery, will effectively solve the bottleneck problems of current domestic proton exchange membrane battery substrate, such as poor comprehensive performance, high manufacturing cost.

The invention belongs to the technical field of seismic isolation of civil engineering structures, and particularly relates to an energy consumption type seismic isolation support with a memory function, which can remarkably improve the energy consumption performance of the support and effectively enhance the resistance to small earthquakes, wind loads and initial impact of large earthquakes. Meanwhile, by means of high initial rigidity and high horizontal bearing capacity, wind vibration and daily micro vibration can be well controlled, the comfort level and safety of the structure in the normal use state are improved, displacement of a shock insulation layer or a key floor can be remarkably reduced, pipelines and non-structural components of the shock insulation layer are protected, and under the action of a large earthquake, the shock insulation layer is prevented from being damaged. The damper can fully yield and enter a plastic energy dissipation state to become a main energy dissipation component, the protection function is further achieved, due to the fact that the damper can provide part of horizontal bearing capacity, rigidity and energy dissipation, the requirements for the shearing force borne by the support body and displacement are lowered, and the support with the smaller size, the lower cost or the lower performance requirement can be selected; and related cost is saved, and environmental pollution is reduced.