40results about How to "High elongation" patented technology

This invention discloses a method for preparing high-elongation bars for cold forging, belonging to the field of aluminum alloy preparation technology. Through optimization of composition and process, the prepared bars possess high purity, uniform and fine equiaxed grain structure, and excellent plasticity, with significantly improved elongation. This meets the stringent requirements of cold forging for high material plasticity, resulting in a bright, crack-free surface and uniform grains after cold forging, overcoming problems such as oxide scale, coarse grains, and poor dimensional accuracy caused by hot forging. Furthermore, the introduction of modified talc and sodium nitrate as refining agents further promotes uniform microstructure, achieving high elongation and excellent cold forging performance.

This invention relates to the field of metal material processing technology. It discloses a synergistic composite forming process for metal wire electroforming and drawing, comprising the following steps: first, surface cleaning and activation treatment of the base metal wire to remove oxide layers, oil stains, and impurities; then, feeding the pretreated wire into an electroforming device to deposit a metal plating layer, obtaining an initial electroformed composite wire; subsequently, direct online radial high-pressure drawing to achieve a dense bond between the electroformed layer and the base metal; followed by annealing of the composite wire; repeating the electroforming, drawing, and annealing steps at least once to complete multiple synergistic cycles; finally, testing the dimensional accuracy, mechanical properties, and interlayer bonding force of the composite wire, and cutting it into finished products after passing the tests. This invention employs an online tandem synergistic process of electroforming and drawing, avoiding plating oxidation and interface contamination. Radial high-pressure drawing can compact the plating layer, eliminate porosity, and improve bonding density.

This invention discloses a hot-rolled steel sheet for vacuum train tubes that exhibits excellent yield strength, weldability, low-temperature toughness of the welded portion, vibration damping ratio, and is free from hot cracking. The hot-rolled steel sheet according to this invention is characterized in that its alloy composition, by weight percent, comprises: C: less than 0.06% (more than 0%), Si: 0.5-1.5%, Mn: 1.2-2.2%, Cu: 0.5-1.5%, Ni: more than 0.25%, Ti+Nb+V: less than 0.02% (inclusive of 0%), the balance being Fe and unavoidable impurities.

This invention belongs to the field of grape cultivation technology, specifically relating to a fruit enlargement agent for Daqing grapes, its preparation method, and its application. The fruit enlargement agent for Daqing grapes is prepared from an aqueous solution of gibberellin, thiabendazole, and brassinolide. Specifically, the concentration of gibberellin in the fruit enlargement agent is 20 mg / L~25 mg / L, the concentration of thiabendazole is 1.0 mg / L~1.25 mg / L, and the concentration of brassinolide is 0.025 μg / L~0.050 μg / L. The fruit enlargement agent of this invention, combined with fruit thinning treatment, can increase the weight of a single Daqing grape berry by at least 20% while retaining the soluble solids content of the grape.

This invention relates to a photocurable polymer composition for 3D printers, comprising a UV-curable polyurethane oligomer, a photoinitiator, a silane coupling agent, oligomers, and a stabilizer. According to the aforementioned photocurable polymer composition for 3D printers, 3D printed outputs with excellent physical properties such as thermal properties, strength, elastic modulus, and elongation can be manufactured, and 3D printed outputs that can restore their original shape even if deformed through use.

This invention discloses a laser-shock-assisted creep aging forming method for thin-walled components with complex curvature. The method includes: simulating and obtaining difficult-to-form regions; performing laser shock on the difficult-to-form regions of a large-size aluminum alloy thin-walled component sheet; wrapping and fixing a breathable felt around the impacted component; placing the component in a sealed space formed between a vacuum bag and the mold surface; evacuating the sealed space; and then sending the mold into an autoclave for creep aging. After completion, the component springs back, yielding the target surface. This method uses a laser to impact localized areas of a large-size aluminum alloy thin-walled component, introducing dislocations while achieving pre-forming. This provides a good surface foundation for subsequent high-precision creep aging forming of the component, and is suitable for forming parts with complex curvature.

The present application relates to a kind of high-precision cold-rolled screw with medium carbon steel hot rolled wire rod in metallurgical technology field, preparation method and application.The present application is aimed at solving the technical problems of low first processing qualified rate of cold-rolled screw caused by poor material organization uniformity and low purity.The chemical composition of the wire rod according to the present application is as follows: C 0.52-0.58%, Si 0.15-0.35%, Mn 0.70-0.90%, Cr 0.10-0.35%, Al 0.015-0.045%, Ti≤0.0025%, [O]≤0.0015%, [N]≤0.0060% and the like, with the balance being Fe.The preparation method of the present application obtains uniform organization with cross-section hardness range ≤20HV through the combined action of narrow component design, continuous casting end electromagnetic stirring, high temperature diffusion annealing and "fast first and slow later" controlled cooling process.The present application is mainly used for manufacturing high-precision ball screw, and the finished product precision reaches more than 5 levels, with first cold-rolled forming qualified rate ≥85%.

This invention discloses a hot-rolled steel sheet with high elongation and a tensile strength of 800MPa, and its manufacturing method, mainly solving the technical problems of low elongation and high production cost of existing hot-rolled steel sheets with a tensile strength of 800MPa. The technical solution is a hot-rolled steel sheet with a tensile strength of 800MPa and high elongation, whose chemical composition by weight percentage is: C: 0.03%–0.06%, Si: 0.20%–0.40%, Mn: 1.00%–1.50%, P≤0.015%, S≤0.003%, Alt: 0.02%–0.05%, Nb: 0.01%–0.02%, Ti: 0.14%–0.20%, Cr: 0.10%–0.30%, N≤0.0040%, with the balance being Fe and unavoidable impurity elements; the elongation at break (A) of the 2.0–6.0 mm thick hot-rolled steel sheet is 20%–30%. It is used to manufacture structural parts for automobiles and other applications.

This invention provides an ultra-high strength, low density Al-Mg-Zn-Sc-Zr-based alloy and its preparation method, belonging to the field of aluminum alloy material technology. The ultra-high strength, low density Al-Mg-Zn-Sc-Zr-based alloy provided by this invention, by mass fraction, has the following chemical composition: Mg 3.0~8.0%, Zn 1.0~5.0%, Cu 0.4~1.0%, Mn 0.1~0.8%, Ag 0.05~0.3%, Sc 0.01%~0.3%, Zr 0.05~0.3%, with the balance being Al. This invention achieves this by precisely controlling the elemental ratios of Mg, Zn, Cu, and Ag, resulting in an alloy that maintains its low density while exhibiting a strong age-hardening effect. Simultaneously, the reasonable addition of trace elements such as Mn, Sc, and Zr enables the alloy to possess a dispersion strengthening effect. Combined with heat treatment and hot deformation processes, this further improves the strength and ductility of the aluminum alloy.

This application relates to a hot-rolled pickled duplex steel and its preparation method, belonging to the field of strip steel production technology. The chemical composition of the duplex steel, by mass fraction, is: C: 0.05%~0.15%, Si: 0.15%~1.50%, Mn: 1.0%~2.0%, Al: 0.02%~0.10%, P≤0.015%, S≤0.006%, Cr: 0.1%~0.5%, Nb: 0.01%~0.05%, Ti: 0.01%~0.03%, Ni: 0.01%~0.40%, V: 0.001%~0.050%, with the remainder being Fe and unavoidable impurities. Through optimized C-Si-Mn-Cr-Nb-Ni composition system design, combined with controlled rolling and staged laminar flow cooling processes, a multiphase microstructure composed of ferrite and martensite was successfully obtained in the hot-rolled pickled duplex steel. This multiphase microstructure enables hot-rolled and pickled duplex steel to maintain high strength while retaining high elongation. Furthermore, a specific component ratio effectively suppresses softening in the weld heat-affected zone. This hot-rolled and pickled duplex steel is particularly suitable for passenger car chassis manufacturing, achieving a balance between lightweight design, high safety performance, and good manufacturability.

The present application relates to a kind of acrylic polymer emulsion, its raw material composition and its preparation method and application, belong to building coating technical field.It includes the following weight parts of raw materials: pre-emulsion I 15-25 parts, pre-emulsion II 45-55 parts, emulsifier solution 10-20 parts, initiator solution 1-10 parts, post-processing solution I 1-5 parts, post-processing solution II 1-5 parts, adipohydrazide 0.5-2 parts, triethanolamine 1-5 parts.The acrylic polymer emulsion prepared in the present application has strong cohesion, elongation and elasticity, the soft porcelain prepared using the emulsion is not easy to break or remain when demolding after curing, thereby effectively solving the adhesion problem of soft porcelain on silica gel mold, and the acrylic polymer emulsion prepared in the present application itself has low odor, significantly reduces the peculiar smell of soft porcelain finished product, improves environmental protection and use experience.

This invention discloses a white, smooth-surface rubber extrusion tube and its preparation method. Using EPDM rubber as the matrix, activators, softeners, reinforcing fillers, modified phenolic resin, lubricants, white pigments, coupling agents, and vulcanization accelerators are added. These materials are mixed in a rubber mixing mill to form a mixed elastomer, which is then extruded into a pre-formed rubber tube in an extruder. The tube is then vulcanized in a vulcanizing tank to become the final product. Extruded rubber products (except silicone) are generally black, mainly because carbon black has good compatibility with rubber, which is beneficial for extrusion. Light-colored or white extruded rubber products often have poor compatibility with the fillers, resulting in rough surfaces or incomplete extrusion. This invention solves the problem of rough surfaces or incomplete pre-forming in light-colored or white rubber extrusion products, meeting different customer needs and enriching the diversity and choice of product colors.

This invention discloses a green and energy-saving extrusion casting method and apparatus that combines liquid phase retention and forced feeding sequential solidification. The method includes the following steps: melting a pre-proportioned metal to obtain a basic alloy melt; degassing and refining followed by the addition of an intermediate alloy to obtain an intermediate alloy melt; lowering the temperature to obtain a finished alloy melt; during casting, adjusting the ingate temperature between the solid and liquid phases of the finished alloy melt; and activating a multi-point positioning cooling device to locally force-cool areas with large wall thicknesses. This invention, by precisely controlling the ingate temperature between the solid and liquid phases of the alloy melt, ensures that the alloy melt at the ingate is in a solid-liquid mixed state during pressure holding solidification. The liquid alloy melt can smoothly pass through the gap between the primary solid phases and flow into the shrinkage cavities of the casting body during pressure holding solidification, achieving further forced feeding of the liquid during the pressure holding process of alloy melt extrusion casting. This results in high-quality castings with high microstructure density, few shrinkage cavities and porosity defects, and excellent strength and elongation.

The application discloses an ultrahigh molecular weight polyethylene-acrylonitrile butadiene rubber composite elastic material, which comprises 70wt%-95wt% of ultrahigh molecular weight polyethylene and 5wt%-30wt% of acrylonitrile butadiene rubber powder, has an island-sea structure, wherein the acrylonitrile butadiene rubber powder is a dispersed phase, the ultrahigh molecular weight polyethylene is a continuous phase, and the dispersed phase and the continuous phase are connected by C-C chemical bonds; and the particle size of the acrylonitrile butadiene rubber powder is less than or equal to 0.7mm. By limiting the content of the ultrahigh molecular weight polyethylene and the acrylonitrile butadiene rubber powder, combining the connection between the two phases by C-C chemical bonds and limiting the particle size of the acrylonitrile butadiene rubber powder, the rubber particles in the composite elastic material are first deformed when the composite elastic material is subjected to external force, so that the composite elastic material has good resilience and lower permanent deformation at a smaller strain.

This invention provides a titanium alloy with a three-phase microstructure and its preparation method. The method includes: treating the titanium alloy with pulsed current followed by heat treatment in a heat treatment furnace. This invention combines pulsed current treatment with conventional heat treatment, overcoming the barrier of high-density dislocations required for the formation of a three-phase microstructure. Only two steps are needed to successfully prepare a three-phase microstructure within the titanium alloy, achieving a short-process and rapid preparation of a three-phase microstructure. The net shape of the sample obtained after treatment by this invention remains unchanged, ensuring that the net shape of the workpiece is not damaged while obtaining a titanium alloy with a three-phase microstructure. The three-phase titanium alloy obtained by this invention exhibits excellent strength and plasticity, with a tensile strength of 1100-1130 MPa and an elongation of 18.5%-23%.

This invention discloses an extendable four-degree-of-freedom underwater camera bracket and an underwater vehicle, including a base, a telescopic arm, a horizontal turntable, and a pitch mount. The base is fixed to an external underwater vehicle. One end of the telescopic arm is detachably fixed to the base. The telescopic arm has multiple mounting positions on the base, each corresponding to a horizontal angle between the telescopic arm and the underwater vehicle. The telescopic arm's length can be adjusted as needed. The horizontal turntable is detachably fixed to the other end of the telescopic arm. The pitch mount is fixed to the horizontal turntable, and the underwater camera is fixed to the pitch mount, which adjusts the camera's pitch angle. Multiple mounting positions are provided between the horizontal turntable and the telescopic arm, each corresponding to a horizontal angle between the telescopic arm and the camera. This design meets the needs of underwater applications, featuring a long underwater service life, deep operating depth, high rigidity to suppress camera shake, and flexible adjustment.

A zinc-based high-strength outer sheet with excellent formability and equipped with a GI or ZM coating, and its manufacturing method, are disclosed. The chemical composition of the steel, by mass percentage, is as follows: C: 0.04%–0.1%, Si: 0.2%–0.5%, Mn: 1.2%–1.8%, P≤0.02%, S≤0.01%, Al: 0.02%–0.05%, Cr≤0.5%, Nb≤0.02%, N≤0.006%, with the balance being Fe and unavoidable impurities. The content of Si, Mn, and Cr satisfies the condition: (Mn+Cr)−2×Si≥0.5%. This method, through optimized composition design and precise control of the annealing-galvanizing process, synergistically solves the core contradiction of achieving high strength, high formability, and high surface quality in high-strength outer sheets. In particular, it effectively inhibits surface oxidation of the substrate, ensuring the uniformity, density, and adhesion of the coating, and can stably produce high-quality outer sheet products suitable for pure zinc (GI) and zinc-aluminum-magnesium (ZM) coatings.

The application discloses a kind of nano-composite ceramic particles modified aluminum alloy powder for 3D printing and preparation method thereof, belong to metal additive manufacturing material technical field.The powder is composed of 7XXX series aluminum alloy powder matrix and TiC and TiB2 nanoparticles attached to its surface.TiC nanoparticle addition amount is 0.3%~1% of total mass, TiB2 is 0.1%~1%, total addition amount is controlled at 0.4%~1%.Two kinds of nanoparticles are uniformly coated on the surface of aluminum alloy powder by low-energy ball milling process, and the "TiB2-Al3Ti-Al" efficient heterogeneous nucleation path is constructed.The application realizes grain ultra-fining and completely crack-free forming under very low ceramic content, while avoiding the plasticity decline and surface treatment performance degradation caused by excessive ceramic phase.The obtained powder has excellent comprehensive performance, and is suitable for the manufacturing of high-strength, high-surface quality components.

This invention discloses a galvanized steel sheet with good adhesion to an electron beam-cured coating, comprising a galvanized steel sheet, at least one surface of which has a composite coating. The composite coating contains the following effective components: an aqueous cationic polymer resin A, comprising 45-75 parts by weight; a compounded organosilane coupling agent B, comprising 15-45 parts by weight; the compounded organosilane coupling agent B is formed by the mixed hydrolysis and condensation of at least one organosilane coupling agent B1 containing an epoxy functional group and at least one organosilane coupling agent B2 containing an amino functional group; a silane coupling agent C containing unsaturated bonds, comprising 3-10 parts by weight; a water-soluble fluorine-containing compound D, wherein the fluorine element comprises 1.5-5 parts by weight; and a water-soluble phosphorus-containing compound E, wherein the phosphorus element comprises 2-5 parts by weight. This invention also discloses a surface treatment agent for galvanized steel sheets and a method for manufacturing a galvanized steel sheet with good adhesion to an electron beam-cured coating.

This invention relates to a seamless can having an inner surface coating at least on its inner surface side, and a coated metal sheet capable of being formed into such a seamless can. The seamless can is characterized in that the inner surface coating contains a polyester resin and a first-order phenolic resin and / or an amino resin as a curing agent, and the gel fraction (A) of the inner surface coating, as shown in the following formula, is 55% or more and less than 90%. This provides a seamless can with excellent resistance to boiling whitening, resistance to embrittlement over time, no coating peeling during heat treatment after forming, and excellent coating coverage, particularly for deep-drawn and thinned cans. Gel fraction (A) = (W2a / W1a) × 100 (%) where W1a represents the mass of the inner surface coating after separation from the coated metal substrate cut from the seamless can, and W2a represents the mass of the separated inner surface coating after immersion in MEK at room temperature for 60 minutes, followed by removal and drying.

The utility model discloses a multifunctional building support frame relates to building support frame technical field. This multifunctional building support frame, including L shape support frame, roof, convex board, drive unit, pivot, fixed block, drive unit is used for driving adjusting plate. This multifunctional building support frame adopts the sunshade net of being received at the roof bottom setting, when the light intensity is bigger, through the bolt of opening lock bolt, the location of fixed link is removed, and the fixed link moves down through the gravity of self -driven sunshade net, and the sunshade net is convenient for shading, and it is convenient for the better construction of construction personnel, and drive unit is convenient for driving adjusting plate movement, and adjusting plate is fixedly connected with convex board, and it is convenient for the elongation of convex board, and the support of top surface is increased, and effectively prevent top dust drop and influence construction.

The application discloses a 1300MPa or above grade cold-rolled steel plate with high elongation and high hole expanding performance, which contains Fe and inevitable impurity elements, and also contains the following chemical elements with mass percentage as follows: C: 0.15%-0.30%, Si: 0.3%-0.5%, Mn: 1.8%-2.5%, Al: 0.01%-0.03%, B: 0.001-0.003%, Ti: 0-0.05%, and the mass percentage of C and Mn satisfies C+Mn / 6>=0.52; wherein the microstructure of the cold-rolled steel plate has nano precipitates with an average diameter less than 30nm. In addition, the application also discloses a manufacturing method of the above-mentioned 1300MPa or above grade cold-rolled steel plate, which comprises the following steps: (1) smelting and casting; (2) hot rolling; (3) hot coil heat preservation cover annealing; (4) cold rolling; (5) annealing; (6) isothermal heat preservation treatment; (7) cooling; (8) flattening.

The present invention provides a photosensitive resin composition containing a photocurable compound and a photoinitiator, wherein the photocurable compound contains an epoxy (meth)acrylic polymer and a photocurable compound having an adamantane ring. The photocurable compound having an adamantane ring can be a (meth)acrylic compound having an adamantane ring. The photocurable compound can further contain a (meth)acrylic compound having an isocyanurate ring. The photocurable compound can further contain a (meth)acrylic compound having a hydroxyl group.

This application provides a high elongation silicone rubber and its preparation method. The high elongation silicone rubber comprises the following raw materials in parts by weight: 100 parts of terminal vinyldimethylsiloxane, 5-15 parts of modified filler, 2-10 parts of vinyl MQ resin, 3-8 parts of polymethylhydrosiloxane, 0.001-0.03 parts of methylbutyninol, and 0.001-0.003 parts of platinum catalyst. The modified filler includes a silane-modified microfibrillated cellulose-chitosan crosslinked composite and a polyvinyl alcohol-β-cyclodextrin complex supported in the silane-modified microfibrillated cellulose-chitosan crosslinked composite. The silicone rubber prepared by this application exhibits excellent elongation and is suitable for applications requiring high flexibility and tensile properties, such as flexible components and elastic packaging, showing broad application prospects.

This invention discloses a tungsten-containing high-chromium martensitic aging ultra-high strength steel powder, comprising, by mass percentage: Ni 14.0-16.0%, Co 10.0-12.0%, Mo 5.0-6.0%, W 1.0-2.0%, Cr 4.5-5.5%, Nb 0.1-0.5%, Si ≤0.3%, Cu ≤0.6%, Al ≤0.4%, C ≤0.03%, with the balance being Fe. The resulting steel parts exhibit stable properties: yield strength ≥1650 MPa, tensile strength ≥1850 MPa, elongation ≥9.0%, hardness ≥51 HRC, and sintering density ≥98%, possessing the advantages of high strength, high toughness, high hardness, and high density.

This invention proposes a low-shrinkage photocurable elastic resin composition based on synergistic compensation and its application. The resin composition has low viscosity and excellent photocurable printing properties. During molding, the non-reactive diluent is volatilized first by a simple stepwise heating of the printed model, and then the temperature is raised to the foaming temperature to cause the thermally expanding microspheres to expand and foam. At this temperature, the chain extender is further condensed. Through the synergistic effect of the non-reactive volatile diluent and the thermally expanding microspheres, physical compensation for curing shrinkage is achieved, which can meet the requirements of both low shrinkage and high elasticity. The method is simple and easy to implement and suitable for industrial applications.