25results about How to "Toughness" patented technology

The invention discloses a silicon carbon material, a preparation method thereof and a lithium ion battery. The preparation method of the silicon-carbon material comprises the following steps: S1, adding an alkaline reagent into a mixed solution containing a porous carbon-loaded silicon substrate, transition metal salt and a solvent, and drying to obtain a first precursor; s2, performing carbon deposition on the first precursor by adopting a chemical vapor deposition method, performing in-situ growth of a carbon nanotube, and then performing acid pickling and drying to obtain a second precursor; s3, performing silicon deposition on the second precursor by adopting a chemical vapor deposition method, and forming silicon nanoparticles and / or silicon nanowires in the carbon nanotubes in situ to obtain a third precursor; and S4, carrying out carbon coating on the third precursor to obtain the silicon carbon material. The silicon-carbon material is excellent in expansion inhibition performance and compressive strength and has excellent conductivity, and the lithium ion battery containing the silicon-carbon material can give consideration to excellent capacity performance, rate performance and cycle performance.

The invention discloses a hoop and a forming method thereof, the hoop comprises a hoop belt with an elastic part, a first mounting part and a second mounting part, the first mounting part and the second mounting part are detachably connected through a connecting piece, and the elastic part, the first mounting part and the second mounting part are integrally formed by paving continuous long fibers and resin materials; the thickness of the large deformation area of the elastic part is smaller than that of the small deformation area and / or the large deformation area is provided with an annular groove. The invention provides a high-performance light-weight long-fiber clamp which is used for fixing aviation cables and pipelines, the clamp can independently adopt a strap and can also be used in cooperation with a rubber pad, the strap adopts a long-fiber composite material strap to replace a metal clamp strap, the product weight is reduced, the size is reduced, and the structural strength is guaranteed; by adopting the modes of reducing structural design, combination of continuous long fibers and resin materials and the like, the toughness of the strap is improved, the deformation elastic force is reduced, the hoop can be manually opened, and the problems of brittle failure and the like of the carbon fiber strap are avoided.

The application discloses an in-situ self-generating ceramic particle reinforced low-tungsten-content composite material, and a preparation method of the in-situ self-generating ceramic particle reinforced low-tungsten-content composite material.The low-tungsten-content composite material is composed of the following components in percentage by mass: W 59% to 69%, Ni 21% to 28%, Fe 9% to 12%, and ceramic reinforcing phase 1%.The tungsten content in the material system is greatly reduced, the toughness of the bonding phase is significantly increased, the plasticity and processing performance are improved, the W atoms in the bonding phase are difficult to diffuse to the surface of other W grains during the sintering process, the long-range migration is blocked, the W grain growth is effectively inhibited, the size of the in-situ generated ceramic particles is small, the distribution is uniform, the interface between the metal matrix and the ceramic particles is pure and firm, the strong dispersion strengthening and fine-grain strengthening effects can be produced, and the application of the low-tungsten-content composite material is suitable for the fields of aerospace, radiation shielding and precision instruments.

This invention provides a submerged arc welding wire suitable for high heat input welding of 50–150 kJ / cm and its application, belonging to the field of welding materials technology. The submerged arc welding wire provided by this invention comprises the following chemical composition: C: 0.07–0.12%, Si≤0.09%, Mn: 1.70–1.95%, P≤0.012%, S≤0.005%, Ni: 0.55–1.00%, Mo: 0.40–0.58%, Ti: 0.11–0.24%, Nb≤0.05%, V: 0.03–0.04%, Ca≤0.0015%, B: 0.0005–0.0045%, Ce≤0.030%, and the balance Fe. The submerged arc welding wire provided by this invention meets the requirements for the mechanical properties of the deposited metal at a heat input of 50–150 kJ / cm, and is applicable to the production of large welded structural components and high-efficiency welding manufacturing.

The utility model provides a spliced anti -impact high toughness rotor core belongs to motor technical field to solve the problem that the rotor core of current adoption integral type structure, winding space is limited, inlaying is difficult, time and cost are high, and local damage needs overall replacement, maintenance cost is high. Including the core inner tube, tooth groove, bottom encapsulation ring, positioning ring, top encapsulation ring, splicing subassembly and limiting component, tooth groove is provided with multiple groups, and multiple tooth groove circumferential array is outside the core inner tube, bottom encapsulation ring fixed connection is established in the core inner tube bottom, positioning ring sets up in the core inner tube top, top encapsulation ring sets up in the positioning ring top, splicing subassembly sets up outside the core inner tube, limiting component sets up outside the core inner tube. The utility model has modularization replacement, maintenance simple, operation convenient and so on advantages.

The invention provides a tape casting method high-transparency polysulfonamide film as well as a preparation method and application thereof. The light transmittance of the high-transparency polysulfonamide film obtained through the tape casting method is larger than or equal to 80% (400-800 nm), and the dimensional change rate at 250 DEG C is smaller than or equal to 1%. The preparation method comprises the following steps: S1, pretreatment of the polysulfonamide fibers: soaking and purifying the polysulfonamide fibers in acetone; then stirring and alkalizing in an alkaline solution; removing the alkaline solution and drying to obtain pretreated polysulfonamide fibers; s2, preparation of a membrane casting solution: dissolving the pretreated polysulfonamide fiber in a solvent to prepare a polymer solution; then adding a salt cosolvent and a polymeric dispersant to prepare a mixed solution, and stirring, filtering and carrying out vacuum defoaming to obtain a membrane casting solution; s3, film forming through a tape casting method, wherein the film casting solution is placed on a substrate, and a wet film is prepared through scraper tape casting; s4, coagulating bath phase inversion: transferring the wet film into a coagulating bath, and coagulating to form a preliminarily shaped film material; and S5, post-treatment: washing the preliminarily shaped membrane material with water, and carrying out gradient drying to obtain the high-transparency polysulfonamide membrane.

The invention discloses a vibrating diaphragm, a sound production device and electronic equipment, and relates to the acoustics field, the vibrating diaphragm comprises at least one thermoplastic polyamide elastomer layer, the thermoplastic polyamide elastomer layer comprises a thermoplastic polyamide elastomer, the thermoplastic polyamide elastomer comprises a hard segment and a soft segment, the hard segment contains an aromatic ring and an amido bond, the soft segment comprises at least one of polyester, polyether, polyether ester, aliphatic polycarbonate or polysiloxane, and the size change rate of the thermoplastic polyamide elastomer layer after heat treatment at 120 DEG C for 1 h is less than or equal to 2%. The vibrating diaphragm provided by the invention can give consideration to rebound resilience and strength required by vibration, and is resistant to high temperature and easy to process.

The invention discloses a self-recognition and self-adjustment bionic flexible strain sensor based on root soft tissue of a mouse whisker receptor and a preparation method of the self-recognition and self-adjustment bionic flexible strain sensor, relates to the technical field of flexible sensors, and provides the self-recognition and self-adjustment bionic flexible strain sensor based on the root soft tissue of the mouse whisker receptor and the preparation method of the self-recognition and self-adjustment bionic flexible strain sensor based on the root soft tissue of the mouse whisker receptor. The sensor can perform self-sensing identification on the motion state of the sensor, and can adjust a sensing reference point (the minimum resistance value of the sensor) in real time according to the motion state, so that the real-time motion monitoring of a single device on a plurality of segments of motion states is realized; according to the invention, the real-time self-adaptive adjustment sensing function of the sensing domain of the tentacle receptor is realized by simulating the distribution mode of root soft tissue muscle fibers, collagen and sensing nerves of the mouse tentacle receptor, material characteristics and a collaborative cooperation mechanism; according to the self-recognition and self-adjustment bionic flexible strain sensor based on the root soft tissue of the rat whisker receptor and the preparation method of the self-recognition and self-adjustment bionic flexible strain sensor, a bionic means is adopted to enable a single sensor to have the functions of motion state self-recognition and sensing self-adjustment; and the requirement of real-time accurate monitoring of a single sensing device for multi-section movement of a mechanical equipment task execution assembly is met.

The application provides a high-pressure corrosion-resistant hard alloy material and a preparation method and application thereof, and belongs to the technical field of alloy materials. The application improves the strength, toughness and corrosion resistance of the material by constructing titanium boride, silicon carbide and chromium diboride hard phases, introduces a multiphase composite binder composed of aluminum-iron alloy, high-entropy alloy and cerium hexaboride to realize high-temperature dense coating, and adopts asymmetric gradient paving and sintering process to construct a gradient structure with high surface hardness, high toughness in the core and stress concentration reduction in the transition layer. Meanwhile, the surface hardness and sealing property are strengthened by powder embedding and calcination, and the wear resistance, corrosion resistance and impact resistance of the material are comprehensively improved.

The application provides a double-curing acrylate-epoxy hybrid adhesive as well as a preparation method and application thereof, and belongs to the technical field of adhesives. The double-curing acrylate-epoxy hybrid adhesive is composed of component A and component B. The component A comprises tetrahydrofurfuryl methacrylate, isobornyl methacrylate, hydroxypropyl methacrylate, N,N-dimethylaniline, a toughening agent, a double-curing resin, wollastonite, fumed silica, solid glass microbeads, an antioxidant, a phosphate monomer and a multifunctional monomer. The component B comprises benzoyl peroxide, an epoxy resin, wollastonite and fumed silica. The double-curing acrylate-epoxy hybrid adhesive prepared by the application can realize the combination of high-temperature strength and normal-temperature toughness, and solves the problem of easy gelation of a traditional NCO-containing system.

The invention belongs to the field of laser cladding and surface engineering, and particularly relates to ceramic particles for laser cladding and a preparation method and application of the ceramic particles. The method comprises the following steps: pretreating ceramic particles, sensitizing the ceramic particles in a tin ion solution, activating the ceramic particles, and depositing a Ni-P coating layer to obtain the ceramic particles for laser cladding. When the ceramic particle for laser cladding is used for aluminum alloy laser cladding repair, particle-matrix wettability and interface metallurgical bonding can be remarkably improved, generation of non-wettability, incomplete fusion and pore defects is reduced, and therefore the compactness and bonding strength of a cladding layer are improved, the agglomeration, sinking and incomplete fusion defects are restrained, and the service life of the cladding layer is prolonged. And the compactness, microhardness, wear resistance and corrosion resistance of the coating are improved. The method has the advantages of mild process, high applicability and easiness in batch production and field repair popularization, and is suitable for surface strengthening and remanufacturing repair engineering of various ceramic / metal combinations.

A method for preparing colored radiant cooling wood is disclosed. The purpose of this invention is to solve the application problems of existing microstructured colored radiant coolers, such as difficulty in preparation, high production costs, and lack of environmental friendliness. The preparation method includes: 1. Immersing dried wood in a lignin removal solution under vacuum conditions, followed by a water bath reaction at 75–80°C; 2. Dispersing fluorescent dye in an organic solvent, mixing it with methyl methacrylate monomer, adding the initiator azobisisobutyronitrile (AIBN), and prepolymerizing at 70–90°C; 3. Permeating the delignified wood into a prepolymerized dye / MMA mixed solution under vacuum; 4. Heating and polymerizing at 70–90°C. The delignified wood used in this invention is green and environmentally friendly. While maintaining excellent mechanical strength, the shape and size of the colored radiant cooler can be rationally set according to the needs of different scenarios, taking into account both flexibility and toughness, and is cost-effective.

The invention discloses wear-resistant alloy steel for a crusher, a plate hammer structure and a crushing cavity structure, the wear-resistant alloy steel is prepared by compounding a matrix material with ZTA ceramic particles, and the volume fraction of the ZTA ceramic particles in the wear-resistant alloy steel is 20-25%; wherein the base material comprises the following raw materials in percentage by weight: 0.50-0.55% of C; 0.9 to 1.2 percent of Si; 0.9 to 1.1% of Mn; 0.9 to 1.2 percent of Cr; 0.4 to 0.6 percent of Mo; 1.6%-1.8% of Ni; 0.18% of Nb; and the balance of Fe. A brand new material design thought is introduced into the field of wear-resistant materials for plate hammers of crushers, an alloy steel matrix with high strength, high toughness and good interface bonding capacity is formed, and the technical limitation that wear resistance and impact resistance of traditional high manganese steel and high chromium cast iron single materials are difficult to consider at the same time is broken through from the material system and organization structure level.

The invention discloses a high-strength plant cellulose-based composite paperboard and a preparation method thereof, belongs to the technical field of paperboard materials, and aims to solve the technical problem that the strength and wet strength retention rate of a plant fiber-based composite paperboard in the prior art need to be further improved. The composite plant fiber layer is composed of a plant fiber layer and interface layers arranged on the two sides of the plant fiber layer in a modifying mode. A plant fiber layer is prepared through CMC modified plant cellulose, a PEG modified inorganic reinforcing agent and a bio-based toughening agent reinforced plant fiber, a composite structure of an interface layer, a fiber layer and an interface layer is formed by arranging a double-interface layer containing lignin nano particles / carboxylated nano cellulose, and a hot-pressing curing process is combined, so that the lignin / carboxylated nano cellulose composite fiber is prepared. The strength and toughness of the plant fiber-based composite paperboard are effectively improved, and the wet strength retention rate of the material is also effectively improved.

The invention belongs to the technical field of epoxy resin, and particularly relates to bromine-nitrogen synergistic flame-retardant modified epoxy resin as well as a preparation method and application thereof. First epoxy resin, tetrabromobisphenol A and a catalyst are subjected to bulk polymerization, obtained tetrabromobisphenol A epoxy resin and diphenylmethane diisocyanate are subjected to a modification reaction, obtained initial modified resin, high-bromine epoxy resin and second epoxy resin are mixed, and the bromine-nitrogen synergistic flame-retardant modified epoxy resin is obtained. According to the invention, the tetrabromobisphenol A modified epoxy resin is subjected to secondary modification, so that the flame-retardant effect can be effectively obtained, residues of tetrabromobisphenol A are further effectively avoided, redundant hydroxyl groups of tetrabromobisphenol A can be consumed by isocyanate in MDI, and a bromine-nitrogen synergistic flame-retardant effect is formed; through effective cooperation of the low-molecular-weight resin and the high-molecular-weight resin, after curing, molecular chains form an interpenetrating network structure, and it can be ensured that after curing, the crosslinking density is stable, and heat resistance and toughness are both considered.

A railway wheel that is excellent in toughness at a hub part is provided. A railway wheel according to the present disclosure includes a rim part, a hub part having a through hole, and a web part. A chemical composition of the railway wheel consists of, in mass%, C: 0.60 to 0.80%, Si: 1.00% or less, Mn: 0.10 to 1.50%, P: 0.050% or less, S: 0.030% or less, and N: 0.0200% or less, with the balance being Fe and impurities. In a cross section of the hub part obtained when the hub part is cut in a central axis direction of the through hole along a plane including a central axis, when regions of 15 mm × 15 mm defined by a plurality of axial line segments parallel to the central axis and arranged at a pitch of 15 mm in a radial direction of the railway wheel from an inner peripheral surface of the through hole, and by a plurality of radial line segments perpendicular to the central axis and arranged at a pitch of 15 mm in the central axis direction from a surface of the hub part in which an opening of the through hole is formed are defined as rectangular regions, the average C concentration in each rectangular region in the cross section of the hub part is less than 0.90% by mass.

The application belongs to the technical field of paint, and particularly relates to high stone impact resistance and free grinding water-based intermediate coating for buses, and a preparation method and application thereof. The high stone impact resistance and free grinding water-based intermediate coating is combined by component A resin paint and component B curing agent according to a weight ratio of 5:1. The component A resin paint comprises the following components: hydroxyl acrylic resin, deionized water, dispersing agent, anti-settling agent, defoaming agent, leveling agent, wetting agent, titanium white powder, talcum powder, flatting powder, thickening agent and solvent A. The component B curing agent comprises the following components: curing agent and solvent B. Compared with the prior art, the application solves the problem that the intermediate coating of the automobile coating in the prior art still needs to be polished during the construction process, thereby leading to complex steps and dependence on the experience of workers. The intermediate coating of the scheme has excellent performance and realizes free polishing operation during the construction process.

The invention discloses a preparation method and application of epoxy resin-glass fiber cloth-melamine compound-aluminum diethylphosphinate blended epoxy resin with high flame retardance and high toughness, and relates to the technical field of polymer composite materials. The invention aims to solve the problem that the traditional composite epoxy resin material cannot have high flame retardance and high toughness at the same time. The epoxy resin-glass fiber cloth-melamine compound-aluminum diethylphosphinate blended epoxy resin prepared by the preparation method disclosed by the invention keeps stable performance in a high-temperature and severe environment, and has good weather resistance, chemical corrosion resistance and dimensional stability. Modification is performed through an environment-friendly halogen-free flame-retardant system, and the adopted melamine compound and aluminum diethylphosphinate are both halogen-free environment-friendly flame retardants, so that release of toxic gas in the combustion process can be effectively reduced. The invention can obtain the preparation method and the application of the epoxy resin-glass fiber cloth-melamine compound-aluminum diethyl phosphinate blended epoxy resin with high flame retardance and high toughness.

The invention discloses a hard alloy cutter tooth of a continuous gradient structure and a preparation method of the hard alloy cutter tooth, the hard alloy cutter tooth is divided into a hard alloy inner core layer, a hard alloy gradient structure middle transition layer and a hard alloy surface working layer from inside to outside, in the hard alloy cutter tooth, the Co content is gradually reduced from inside to outside, and the Co content is gradually reduced from inside to outside. In the middle transition layer of the hard alloy gradient structure, the content of the carbide and the hard alloy grain inhibitor is gradually increased, and in the middle transition layer of the hard alloy gradient structure, the content of Co is linearly and continuously decreased from inside to outside, and the content of the carbide and the hard alloy grain inhibitor is linearly and continuously increased from inside to outside; the hard alloy cutter tooth of the continuous gradient structure is of a hard alloy inhibitor component gradient distribution structure with controllable components, the physical structure that the inner portion is thick and the outer portion is thin is achieved, the physical and mechanical characteristics that the outer portion is hard and the inner portion is tough are achieved according to the functional gradient structure principle, and the abrasion resistance and impact toughness of the cutter tooth are remarkably improved. And the service life and the working efficiency of the tunneling tool are improved.

The invention discloses a matte water-based two-component finish paint for rail transit interiors and a preparation method thereof.The finish paint is prepared from a component A and a component B. The component A is prepared from, by weight, 20-40 parts of 1 # water-based acrylic acid hydroxyl dispersion, 10-25 parts of 2 # water-based acrylic acid hydroxyl dispersion, 1-5 parts of trimethylbenzene, 1-5 parts of dipropylene glycol butyl ether, 0.1-1 part of wetting agent and 0.1-1 part of flatting agent; the water-based paint comprises the following components in parts by weight: 8-25 parts of water-based color paste, 10-20 parts of deionized water, 5-10 parts of talcum powder, 3-10 parts of a composite halogen-free flame retardant, 0.2-1 part of a defoaming agent, 0.5-1 part of an anti-aging agent, 0.1-3.0 parts of matt powder and 0.5-2 parts of a rheological agent. The component B comprises 40-60 parts of propylene glycol diacetate and 40-60 parts of a water-based isocyanate curing agent; through matching of soft and hard resin, toughness and hardness are both considered; the talcum powder is matched with the matt powder, so that the surface of the rail transit interior trimming panel is free of floating and good in matt property.

The present application belongs to the technical field of special metal material heat treatment, and particularly relates to a special metal material and a surface and interface heat treatment process thereof. The material composition is as follows in terms of weight: C 0.03-0.08%, Cr 18.0-22.0%, Ni 8.0-12.0%, Nb 0.05-0.15%, Mo 1.5-2.5%, and the balance of Fe. The process comprises: 1050-1150 DEG C solid solution, 850-900 DEG C low-temperature rare earth carburizing, adding 0.3-0.8% nano La2O3, and inductive quenching in a temperature environment of 900-950 DEG C, and finally tempering in a temperature environment of 200-250 DEG C. The present application realizes comprehensive improvement of surface hardness, core impact toughness, neutral salt spray corrosion resistance and other performances. The workpiece made of the special metal material of the present application is suitable for heavy load corrosion working conditions, and the process can be reformed by using existing equipment, thus being low in cost.

This invention belongs to the field of alloy forming technology and discloses a 2GPa-grade hydrogen embrittlement-resistant hot-formed steel containing NbVTiMo composite precipitates, its preparation method, and its applications. Through the synergistic proportioning of Nb, V, Ti, and Mo quaternary microalloys, a NbVTiMo composite nano-precipitate with high thermal stability and good interfacial bonding is formed. Compared with traditional single / low-element microalloy precipitates, this composite precipitate can act as a highly efficient hydrogen trap, significantly improving the hydrogen atom capture ability, effectively inhibiting hydrogen enrichment at grain boundaries and defects, improving the hydrogen embrittlement resistance of hot-formed steel, and reducing the risk of hydrogen-induced cracking and delayed fracture. Simultaneously, extending the coiling holding time promotes the full nucleation and dispersed distribution of the precipitates; shortening the austenitizing holding time avoids excessive dissolution and coarsening of the precipitates, maintaining the nanoscale of the precipitates, and achieving a fine and dense distribution of the precipitates, thus balancing hydrogen embrittlement resistance with the strength and toughness of the steel.

The application relates to the technical field of automobile cables, and discloses a cable insulation material and a preparation method thereof.The cable insulation material provided by the application comprises, in parts by weight, the following raw materials: 20-35 parts of thermoplastic polyurethane, 40-60 parts of polydodecanamide, 0.5-2.0 parts of a compatilizer, 0.3-1.5 parts of a cross-linking curing agent, 5-15 parts of silane-modified fillers, 0.2-0.5 parts of an antioxidant, and 0.2-0.8 parts of a lubricant.The compatilizer containing double bonds, ester groups and carbonyl groups, the cross-linking curing agent and the silane-modified fillers are added to the cable insulation material, so that the heat resistance, dielectric properties, interface compatibility, hydrolysis resistance, tensile strength and elongation at break of the cable insulation material are simultaneously improved, the material has both flexibility and rigidity, the processing and use requirements of the cable, such as bending and stretching, can be met, and problems such as brittle fracture and falling-off can be avoided.

The application relates to the technical field of aluminum alloy materials, and specifically discloses a new energy battery package shell aluminum-silicon binary alloy and a preparation method thereof, which comprises the following steps: double-component independent precise smelting, smelt purification technology, smelt degassing and standing, high-low temperature double smelt synchronous diffusion mixing, low superheat laminar flow stable-pressure pouring, liquid nitrogen cooling and natural aging, so that the technical problems of large deformation, many defects and poor air tightness of a power battery shell are solved. The alloy is composed of aluminum and silicon and does not contain modification elements such as copper, magnesium, zirconium, titanium, rare earth and strontium, and has simple formula and strong recyclability; the method can refine the crystal grains; the residual stress of the aluminum alloy is greatly reduced, the air holes and shrinkage holes are eliminated, the size stability and sealing performance are improved, and the alloy is suitable for the harsh working conditions of long-term high-low temperature alternation and vehicle vibration of a new energy power battery.

This invention discloses a metal-ceramic material with a white core and black ring structure and its preparation method. The metal-ceramic material comprises, by mass percentage, the following raw materials: Ti(C) 0.3 N 0.7 ) is 10% to 20%, Ti(C) 0.5 N 0.5 The metal-ceramic material contains 40%–50% Fe, TaC 1%–4%, WC 15%–30%, TiWC 0%–10%, Mo2C 2%–5%, Cr3C2 0.2%–1.2%, and the total content of Co and Ni is 8%–14%. Carbon powder is also added to this metal-ceramic material, with the amount of carbon powder added being 0.35%–1% of the total mass of all raw materials. The metal-ceramic material of this invention has advantages such as high hardness, high toughness, and excellent impact resistance, with a Vickers hardness reaching 1641 HV. 30 Its fracture toughness can reach 11.23 MPa.m. 1 / 2 Its flexural strength can reach 2648MPa.