155results about How to "Guaranteed ductility" patented technology

The invention relates to high-strength cold asphalt crack-pouring waterproof adhesive and a preparation method thereof. The waterproof adhesive comprises the following components in portion by weight: 15 to 20 portions of modifier polymer, 2.0 to 3 portions of dispersant, 0.5 to 2.0 portions of stabilizing agent, 50 to 60 portions of heavy rubber asphalt, 1.5 to 2.0 portions of emulsifying agent, 15 to 18 portions of purified water, and 4 to 16 portions of curing agent. The waterproof adhesive has the advantages of simple preparation, reliability and excellent properties, can be widely applied to crack pouring for large traffics in cities and countryside, heavy loading high-grade roads, stress absorbing structural layers, waterproof and mist sealing layers or layer sealing mat coats and the like, and remarkably improves water proofing, skid resistance, flatness and abrasion resistances of the roads.

The invention discloses a connecting structure for an assembly type concrete shear wall edge member. vertical connecting reinforcing steel bar, which can be provided with an upset head, is reserved through a hole reserved in a large-diameter metal bellows, and is sleeved with a continuous spiral stirrup; then the vertical connecting reinforcing steel bar and the continuous spiral stirrup are commonly inserted into the large-diameter metal bellows; and fine aggregate concrete (or a grounding material) is poured into the metal bellows, so that the reliable connection of the edge member is realized. Due to reliable anchoring of the vertical connecting reinforcing steel bar, the optimization of the diameter, the quantity and the plane arrangement of the vertical connecting reinforcing steel bar, and the increase of the wet joint area on a splicing surface, full exertion of the bearing capacity of the shear wall is ensured; and multiple effective restrain for the subsequentlly-poured fine aggregate concrete (or the grouting material) is formed by the shear wall stirrup, a horizontal tie bar, the metal bellows and the continuous circular spiral stirrup, and thus the integral performance of the part is remarkably improved. According to the connecting method for the edge member, which is provided by the invention, the stress continuousness of the vertical steel reinforcing bar is ensured, the deformaility and the ductility performance of the vertical steel reinforcing bar are remarkably improved, and the shock resistance of the assembly type concrete shear wall is improved. Meanwhile, the method is simple in manufacturing process and facilitates the practice and application.

The invention discloses an electroplating method for electrically depositing Ni-Co-B alloy coatings on continuous casting crystallizer copper plates and belongs to the technical field of electroplating. An electroplating solution used by the method comprises the following components according to mass concentration: 170-350g/L of nickel salt, 5-50g/L of cobalt salt, 0.5-4g/L of sodium borohydride,20-60g/L of ethylenediamine and 30-50g/L of buffering agents. The Ni-Co-B alloy coatings prepared from the electroplating solution have high throwing power and excellent corrosion resistance performance; the micro hardness of the Ni-Co-B alloy coatings can reach 1000HV.

The invention provides a preparation method of a nanoscale silicon carbide magnesium alloy material. The nanoscale silicon carbide magnesium alloy material is prepared by uniformly dispersing and distributing a light nanoscale silicon carbide material through particle fine treatment in the magnesium alloy material. The nanoscale silicon carbide magnesium alloy material comprises the following components in percentage by weight: 1-1.5% of nanoscale silicon carbide, 10-11.5% of aluminum, 1.1-1.8% of zinc, 0.05-0.2% of manganese, less than or equal to 0.2% of inevitable impurities, and the balance of magnesium. According to the preparation method of the nanoscale silicon carbide magnesium alloy material provided by the invention, higher solid solubility is formed in a magnesium alloy substrate by means of characteristics of high hardness and wear resistance and the like of nanoscale silicon carbide, so that the stretching and compressing yield strength is enhanced while the welding performance, corrosion resistance and malleability of the nanoscale magnesium alloy material are ensured.

The invention relates to an energy-saving wall with connecting keys and recycled concrete wall panels holding insulation block masonry and a manufacturing method of the energy-saving wall, and belongs to the technical field of constructional engineering. The energy-saving wall mainly comprises insulation block masonry, a wire mesh frame, recycled concrete, and connecting keys. The insulation block masonry is built first in construction. Wire mesh is bent and is fixed by tie bars reserved on the insulation block masonry so that the wire mesh frame is formed. A formwork is erected and the recycled concrete is poured, and accordingly the energy-saving wall with the connecting keys and the recycled concrete wall panels holding the insulation block masonry is formed. The energy-saving wall built with the recycled concrete is economical, practical, energy-saving and environment-friendly. Different from the traditional energy-saving wall, the energy-saving wall is provided with the concrete wall panels and the wire mesh on two sides of the insulation block masonry and is better in thermal insulation, acoustic insulation and energy saving. The energy-saving wall complies with the energy saving and environment protection design, and the development trend of modern architecture, and is widely applicable to the field of constructional engineering.

The invention discloses a municipal highway, a road surface structure and a construction method of the highway pavement, including the highway, on which there are altogether an epoxy resin asphalt layer, an FRT layer, a concrete layer, coal gangue, a lime layer, a slag soil base, steel bars, Reinforced grid mesh, pouring vertical steel columns inside the road, so as to avoid the dislocation between the road surface and the roadbed after a long time, the upper surface of the lime layer is bonded to the middle layer of the paved road surface and the asphalt concrete on the upper layer of the road surface and pressed together In fact, during road construction, because the FRP waterproof layer has good water resistance, it can avoid the uneven settlement caused by the accumulation of water penetrating into the roadbed, and then can ensure the smoothness of the road surface. The epoxy resin laid on the surface of the road The asphalt layer makes the road surface have good ductility, so that the road surface will not crack during the long-term extrusion.

The invention relates to a method for machining a stainless steel singe dual-lug support plate nut. The method includes the steps of the step A, machining a cold heading mould, the step B, trimming, the step C, tapping and the step D, shell nosing, wherein the step A includes the step A1 of primary heading and the step A2 of final heading. The method is advanced, easy to adopt, and capable of ensuring malleability and flowability of materials; the percent of pass of riveting of machined parts can reach 100%, and the parts can meet assembling requirements.

The invention discloses a truss imitating type damper structure transfer layer, which is a truss type combination structure formed by a frame column, a transferring beam, a floor beam and damper. Upper portion structures of shear walls and the like are constructed on the transferring beam, stagger beam bodies form a beam system of the transferring beam, and stagger beam bodies form a beam system of the floor beam. The beam system of the transferring beam and the beam system of the floor beam are respectively provided with secondary beams. The secondary beams are provided with supports, a support under the beam system of the transferring beam and a support above the beam system of the floor beam are connected through a damper which is installed in inclined mode, and soft base cushions and cushion boards are sequentially installed between the supports and the secondary beams. The truss imitating type damper structure transfer layer breaks through a quake-proof design and research method, and a mixed damping device is composed of the damper, the soft base cushions and the supports, thereby reducing earthquake influence of a transfer layer structure. The truss imitating type damper structure transfer layer is simple in structure, economical and practical and has great popularization value.

The invention discloses an internally matching network for a microwave power transistor and a manufacturing method of the internally matching network. The internally matching network comprises an internally matching mass optical memory (MOM) capacitor, a lower electrode outgoing line (5), a first upper electrode outgoing line (6) and a second upper electrode outgoing line (7), wherein the lower electrode outgoing line (5) of the MOM capacitor is led out of the upper surface (4), which is exposed by photoetching, of a lower electrode, and the other end of the lower electrode outgoing line is connected with a grounding pin of a tube core (8) transistor. The internally matching network has the advantages that the lengths of the electrode outgoing lines are shortened, the performance of the internally matching transistor is improved, a manufacturing process of the internally matching power transistor is simplified, the difficulty of the process is reduced, the utilization rate of a tube shell is improved, and the development period is shortened.

The invention relates to the technical field of rubber production, in particular to a waste rubber softening device for the rubber production. The waste rubber softening device comprises a feed pipe,a heating cavity and a flow-guiding pipe. Waste rubber is used as production raw materials, environment is protected, and energy is saved. The waste rubber is smashed by a smashing knife in the feed pipe, falls into the heating cavity, and is convenient to heat. An outer heating piece and an inner heating piece generate heat, and raw material particles falling into a grinding cavity fall on a grinding wheel; not only are heating and softening carried out, but also part of the raw material particles moves following the grinding wheel, and is in contact with the inner wall of a tank body to be heated and softened, so that uniform heating and softening of the rubber are realized. The softened rubber flows into the bottom of the heating cavity, is squeezed by the grinding wheel, and flows intothe flow-guiding pipe. The rotating shaft rotates to drive screw blades to rotate to stir the rubber so as to ensure the ductility. An insulating layer of the outer wall reduces heat loss to keep thetemperature.

The invention relates to the technical field of metallurgy, and particularly discloses a hot-rolled wire rod for a 90-kilogram-grade welding wire and a production method thereof. The hot-rolled wire rod comprises the components of C, Si, Mn, Ni, Mo, Cr, V, Ti, Al, N, Zr and the balance Fe and inevitable impurities. The hot-rolled wire rod for the 90-kilogram-grade welding wire is prepared throughthe procedures of steelmaking, continuous casting, heating, rolling, laying and cooling. According to the method, through component adjustment and process optimization, the prepared hot-rolled wire rod meets the requirements of the wire rod for the 90-kilogram-grade welding wire, a ferrite+pearlite structure suitable for drawing is obtained, and the strength, toughness and plasticity of the wire rod are good so that the annealing process can be omitted in the welding wire processing process, welded deposited metal has moderate strength, the low-temperature impact energy is good, the productionefficiency is high, and the wide application prospect is achieved.

The steel pipe not only satisfies predetermined expression, but also regulates chemical composition, and satisfies following conditions (A)-(C): (A) the central portion for removing the surface portion 2mm from the front and the back face of the steel pipe has an average Vickers hardness from 230 to 310; (B) in microscopic constitution of steel pipe, bainitic ferrite structure is over 80% in area, martensitic phase is below 5% in area; (C) average Vickers hardness Hv of the surface portion 2mm from the front and the back face of the steel pipe is below 1.3 times of the average hardness Hv of the central portion. According to the construction, high strength and low yield ratio can be realized in the mean time, tractility can be ensured by reducing hardness on external surface of the steel pipe due to bending machining in steel pipe forming, cracking resistance in welding can be improved because of improved shock resistance for steel pipes with highest tensile strength at 780MPa for building reinforcement.

The invention relates to the technical field of aluminum alloys, in particular to a heat treatment method for synchronously improving strength and ductility of a 7-series aluminum alloy plate. According to the heat treatment method, a 7-series aluminum alloy hot-rolled plate is adopted as a treated object, solution treatment, pre-aging treatment, retrogression heating treatment and re-aging treatment are adopted in sequence, and a product is obtained. When the design process is applied to an aluminum alloy 7050 plate, the strength of extension of the obtained product ranges from 565 MPa to 590MPa, the yield strength of the obtained product ranges from 520 MPa to 560 MPa, and the ductility of the obtained product ranges from 20% to 23.5%. The strength and ductility of an alloy can be improved at the same time. In addition, the continuous temperature increase and heating manner is adopted, a large amount of time can be saved in the retrogression heating treatment stage, and the production efficiency is improved.

The invention relates to the technical field of metallurgy, and in particular relates to a method for producing 4Cr5Mo2V hot work die steel. The method comprises the following steps: processing a raw material so as to obtain steel ingots, heating the steel ingots for a reset time at a preset temperature so as to melt carbide inside the ingots to obtain homogenized ingots, and further processing the homogenized ingots so as to obtain the 4Cr5Mo2V hot work die steel. Due to adoption of the method for producing the 4Cr5Mo2V hot work die steel, the phenomenon that the machined 4Cr5Mo2V hot work die steel is cracked or fractured at early stage is avoided. In addition, in the process that the ingots are heated and the carbide inside the ingots is dissolved, the internal tissue inside the ingots is uniform, the stress of the internal tissue of the ingots is reduced, and macrosegregation can be eliminated to a certain extent.

The invention relates to the technical field of metallurgy, and particularly discloses a hot-rolled wire rod for a 70-kilogram-level welding wire and a production method thereof. The hot-rolled wire rod comprises the following components: C, Si, Mn, Ni, Mo, Cr, V, Ti, Al, Zr and the balance of Fe and inevitable impurities, and the hot-rolled wire rod for the 70kg-grade welding wire is prepared through the procedures of steelmaking, continuous casting, heating, rolling, spinning and cooling. Component adjustment and process optimization are carried out, the prepared hot-rolled wire rod meets the requirements of a wire rod for a 70-kilogram-level welding wire, and a ferrite and pearlitic structure suitable for drawing is obtained; the strength, the toughness and the plasticity of the wire rod are good; and therefore the annealing procedure can be omitted in the welding wire machining process, deposited metal obtained after welding is moderate in strength, good in low-temperature impact energy and high in production efficiency, and the wide application prospect is achieved.

The invention belongs to the field of board material processing technology, and especially relates to a processing method for bend forming of boards. The processing method comprises following steps: material selection; board combination; hot press molding; height cutting; polishing and organizing; spraying of a priming paint; polishing of a priming paint layer; and spraying of a finishing coat. According to the processing method, cross-band veneers and surface veneers are bonded in a criss-cross staggered manner along the texture direction, and then are subjected to hot press molding using a thermocompressor. Load carrying capability is increased 3 to 4 times because that an original texture structure is changed. One-step hot press molding is adopted in the processing method, so that, begin from raw materials production cost is reduced, processing processes of the boards are simplified, production efficiency is increased, and cost is reduced.

The invention discloses palladium-silver alloy for repairing an oral cavity. Alloy ingredients are optimized by an alloy material. Compared with the prior art, the obtained material has the advantages of good mechanical property, good corrosion resistance, low sensitization, and beautiful color and luster under the premise of not reducing the alloy property and clinical use effect; and the cost is just 1/4 to 1/3 of gold alloy.

The invention relates to a combined wall with connecting keys and waste brick masonries filled in regenerated concrete wall boards and a fabrication method of the combined wall, belonging to the technical field of construction engineering. The combined wall mainly comprises the waste brick masonries, a steel wire mesh framework, the regenerated concrete wall boards and the connecting keys. During fabrication, the waste brick masonries are built according to design size, steel wire meshes are bent and fixed by using preserved tie bars on the waste brick masonries to form the steel wire mesh framework, templates are erected and then regenerated concrete is poured to form the combined wall with the connecting keys and the waste brick masonries filled in the regenerated concrete wall boards. Most materials used by for fabricating the combined wall are construction wastes and are economic, practical, energy-saving and environmental-friendly; the transverse steel wires of the steel wire mesh framework are dense, the shear resistance is good and the wall body is prevented from being damaged due to brittle shear; and different from the traditional brick masonry walls, the bearing capacity, the ductility and the like of the wall body are guaranteed since the steel wire meshes and the concrete are filled in the wall body, the goals of reinforcing house integrity and improving the overall shock absorbing and energy dissipating performance are realized, the combined wall is suitable for village and town buildings and the application prospect is wide.

The invention discloses a wear-resistant nitrile rubber composition and application thereof. The composition comprises the following components in parts by weight: 100 parts of carboxylated nitrile rubber, 0.5-5 parts of a vulcanizing agent, 5-10 parts of zinc oxide, 3-8 parts of organic modified nano silicon dioxide, 1-3 parts of stearic acid, 1-6 parts of an accelerant, 0.5-2 parts of an anti-aging agent, 30-80 parts of carbon black and 5-15 parts of solid coumarone resin. All the components are matched, abrasion resistance, strength and ductility can be considered at the same time, are usedfor preparing the pump truck split piston, the average square amount is obviously increased, the service life of the piston is greatly prolonged, and remarkable application value is achieved.

The invention relates to the field of buildings and civil engineering, in particular to a flexible base layer bituminous road surface. The problem that in the relative technology, the road condition quality is poor is solved. The flexible base layer bituminous road surface comprises a surface layer, a base layer, a cushion layer and an earth base which are sequentially arranged from top to bottom. The surface layer comprises a bituminous concrete surface layer body, a bituminous macadam surface layer body and a bituminous injecting gravel surface layer body; the base layer is at least formed by evenly mixing a bituminous mixture, bituminous injecting macadam and ABS particles; the cushion layer comprises a grading macadam layer body which forms a dense structure by mixing macadam of different particle diameters and being subjected to compaction; the thickness of the flexible base layer bituminous road surface is gradually reduced in the direction from the middle of the flexible base layer bituminous road surface to the two sides in the width direction; and the flexible base layer bituminous road surface further comprises first reinforcing column bodies, first unchoking pipes and second unchoking pipes, wherein the first reinforcing column bodies and the first unchoking pipes are arranged between the earth base and the cushion layer, and the second unchoking pipes are arranged on the base layer. The flexible base layer bituminous road surface can be well used under the long-time and high-load condition.

The invention discloses a degradable thin film with a waterproof and moisture permeable function. The degradable thin film is obtained by drying a slurry emulsion, and the slurry emulsion is formed by the following components by weight parts: 70 parts of polyester type polyurethane, 30 parts of polyether polyurethane, 40-50 parts of toluene, 20-30 parts of acetone, 20-30 parts of dimethylformamide, 8-12 parts of diphenylmethane-4,4'-diisocyanate, 1-3 parts of triethanolamine, 1-3 parts of tetra-[beta-(3,5-ditertiary butyl-4-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.2-0.5 part of acrylate polymer; the slurry emulsion is processed by using the following process to form the degradable thin film; and the process comprises the following steps of: coating the slurry emulsion on the surface of silicone oil release paper; and sequentially drying under a low-speed flowing air atmosphere under the conditions of 80-100 DEG C, 110-130 DEG C and 150-180 DEG C to obtain the degradable thin film. The degradable thin film disclosed by the invention guarantees the flexibility and the malleability, and also accelerates the forming of the thin film to improve the moisture permeable performance of the thin film.