55results about How to "Safeguard Resilience" patented technology

The invention discloses wind power flange steel and a production process thereof. The wind power flange steel comprises the following components in percentage by weight: C: 0.14-0.17, Si: 0.25-0.40, Mn: 1.35-1.50, P: smaller than or equal to 0.015, S: smaller than or equal to 0.003, V: smaller than or equal to 0.015-0.030, Nb: smaller than or equal to 0.025-0.040, Al: 0.030-0.045, N: smaller thanor equal to 0.004, H: smaller than or equal to 0.0001, O: smaller than or equal to 0.002, and As-Cu-Cu mixture: smaller than or equal to 0.1. The invention adopts a continuous-casting method to produce and manufacture the wind power flange steel. The integral process flows comprise the following steps: optimizing molten steel; pretreating KR molten steel; carrying out argon-stirring treatment in atop and bottom blowing converter of 120 tons; refining in an LF furnace; carrying out VD vacuum degassing treatment; continuously casting; cooling in pile; testing; and entering a warehouse. Comparedwith the prior art, the invention improves the manufacture yield of the wind power flange steel. Compared with a traditional forging ingot mold flange, a wind power flange forged by a continuous-casting blank improves the yield by more than 25 percent and greatly decreases the cost.

The invention belongs to the technical field of composite material preparation, and particularly relates to a high-strength and high-toughness ultrahigh-temperature ceramic matrix composite material and a preparation method thereof. The preparation method comprises the following steps: alternately depositing two coatings on the surface of the carbon fiber material by adopting a chemical vapor deposition method to obtain the carbon fiber material with the multilayer CVD composite coating, wherein the two coatings are one of a pyrolytic carbon layer or a layered ceramic coating and an ultrahigh-temperature ceramic coating; adopting a phenolic resin/epoxy resin solution and ceramic powder to form ceramic slurry, coating the CVD composite coating carbon fiber material with the ceramic slurry, performing alternately staggered stacking and needling to obtain a stacked fiber felt, and after vacuum drying, performing warm-pressing curing and carbonization treatment, and obtaining a porous prefabricated body; and finally, carrying out densification treatment to obtain the ceramic-based composite material. The material has high strength, high fracture toughness, oxidation resistance, ablation resistance and corrosion resistance, and can be applied to high-temperature and ultrahigh-temperature structural materials, oxidation-resistant and corrosion-resistant materials and aerospace ablation-resistant materials.

The invention discloses a flexible cable with a heat dissipation effect, belongs to a multifunctional cable in the technical field of cables and aims at providing the flexible cable with the heat dissipation effect. According to the technical scheme, the flexible cable comprises a flexible cable core group arranged in the middle, wherein a first heat dissipation grid tube group is arranged outsidethe flexible cable core group; the length directions of grid tubes in the heat dissipation grid tube group are set along the radial direction of the flexible cable core group; a plurality of elasticcables are arranged outside the first heat dissipation grid tube group and are uniformly distributed along the external circumferential direction of the first heat dissipation grid tube group; a spring coil is arranged outside the elastic cables; a second heat dissipation grid tube group is arranged outside the spring coil; and a heat absorption layer is arranged outside the second heat dissipation grid tube group. The flexible cable with the heat dissipation effect has a good heat dissipation function while the flexibility of the cable is strengthened, and can be widely applied to a relatively harsh environment.

The invention discloses low carbon, low boron, and high chromium alloy steel and a preparation method thereof which relates to the technical field of alloy steel. The low carbon, low boron, and high chromium alloy steel includes, by weight, 0.05-0.30% of carbon, 1-3.0% of silicon, 0.8-1.3% of manganese, <0.04% of phosphorus, <0.04% of sulfur, 8-13% of chromium, 0.5-2.5% of nickel, 0.1-0.8% of molybdenum, 0.03-0.25% of boron, 0.1-0.3% of aluminum, 0.05-0.2% of tin, 0.3-1.0% of vanadium, 0.1-1.5% of tungsten, 0.05-0.3% of copper, 0.005-0.015% of tantalum, 0.05-0.15% of cobalt, 0.05-0.25% of niobium, 0.8-2.0% of cerium, 0-0.08% of titanium, with the balance being iron and unavoidable impurities. The alloy steel of the invention enables high toughness and impact resistance performance to be ensured, enables wear resistance and hardness to be improved, is easy to control in process, and is suitable for civilian use and promotion.

The invention relates to a high-tenacity bismaleimide resin carrier structure adhesive film and a preparation method thereof. The invention aims at solving the problems of the existing bismaleimide adhesive that the tenacity is poor and the peel strength is low. The adhesive film is prepared from bismaleimide resin, a technical modifier, macromolecule blending alloy, a curing agent, a silane coupling agent and a carrier. The preparation method of the adhesive comprises the following steps of: firstly pre-polymerizing the bismaleimide resin and the copolymeric modifier so as to prepare bismaleimide resin prepolymer, then uniformly mixing the bismaleimide resin prepolymer, the macromolecule blending alloy, the silane coupling agent and the curing agent so as to prepare sizing material through a mechanical blending method, and taking braided fabric as the carrier and preparing the film adhesive through a dual-roller hot rolling manner. The adhesive has the characteristics of high strength, thermostability and high tenacity and can be used for cementing thermostability metal and resin-based compound material structural members in the field of aerospace.

The invention discloses a low-carbon low-boron medium-chromium alloy steel, and a preparation method thereof, and belongs to the technical field of alloy steel manufacturing. The low-carbon low-boronmedium-chromium alloy steel comprises 0.05 to 0.30% of carbon, 1.0 to 3.0% of silicon, 0.8 to 1.3% of manganese, phosphor of 0.04% or lower, sulfur of 0.04% or lower, 3.5 to 7.9% of chromium, 0 to 0.08% of titanium, 0.3 to 2.0% of nickel, 0.1 to 0.5% of molybdenum, 0.03 to 0.25% of boron, 0.1 to 0.3% of aluminium, 0.5 to 1.5% of cerium, 0.02 to 0.1% of tin, 0.3 to 1.0% of vanadium, 0.1 to 1% of tungsten, 0.05 to 0.3% of copper, 0.005 to 0.015% of tantalum, 0.05 to 0.15% of cobalt, 0.05 to 0.25% of niobium, and the balance iron and unavoidable impurities. The hardness of the low-carbon low-boron medium-chromium alloy steel is HRC45-55, the impact energy is 8 to 15J/mm<2>. The preparation method is capable of guaranteeing the high toughness and impact resistance, and improving the wear resistance and hardness, is convenient to control, and is suitable for civil applications and popularization.

The invention provides a vehicle transmission gear and a manufacturing method thereof. The manufacturing method comprises the steps of blank forming, preheating treatment, turning machining, final heat treatment and finish machining, wherein the final heat treatment step comprises multiple times of carburization, carbonitriding, quenching, tempering and the like. The vehicle transmission gear manufactured through the manufacturing method has the excellent comprehensive performance.

The invention relates to a lightweight high-strength heat-insulation moisture-proof composite paper board composited by multiple layers of boards and successively including a surface elastic polylactic acid antishock board, an antishock fiber layer I, a honeycomb paper core and a bottom facial paper I, an environmental-protection foamed buffer layer, an antishock fiber layer II, a corrugated paper core and a bottom facial paper II and a bottom polylactic acid strength board. The composite paper board is also characterized in that the inner surface of a space formed by the corrugated paper core and the honeycomb paper core with the bottom facial papers is coated with an inorganic cellulose coating layer; the antishock fiber layer I and the antishock fiber layer II are formed by placing a nanoparticle suspension into multiple layers of fabrics and compositing. The composite paper board is light in mass, good in strength and good in shock resistance, and can be applied to buffer protection in the field of industrial and civil used board materials.

The invention discloses a preparation technology of a fan covering for a fan. The technology comprises the following steps that a fan covering raw material is prepared, a glue and alum solution is prepared, the fan covering raw material is cut into sectors to obtain fan covering bodies, one fan covering body is taken, brushed with the glue and alum solution and covered by one same fan covering body, and after multiple times of repetition, a bonded fan covering body is obtained; a plurality of hollow spacing paper slips are arranged on the bonded fan covering body at equal intervals, then the hollow spacing paper slips are covered by one fan covering body, and a primary fan-covering product is obtained after mounting, sleeving, folding and edge covering and bonding are conducted on the fancovering body; the primary fan-covering product is pressed, and then a finished fan-covering product is obtained through drying; the finished fan-covering product is put into a baking room for baking,and then the fan covering of the fan is obtained. By means of the technology, the strength and the toughness of the fan covering are higher; the fan covering produced through the production technology is not only suitable for a circular fan, but also suitable for a folding fan or a fan of other types after a folding working procedure; the application range of the fan covering is very wide, and meanwhile, the toughness and the strength of the fan covering are fully guaranteed.

The invention discloses an anti-pilling knitted fabric and a preparation method thereof. The anti-pilling knitted fabric comprises a base cloth layer, wherein a first reinforcing layer is arranged atthe top of the base cloth layer; a second reinforcing layer is arranged at the bottom of the base cloth layer; and an anti-pilling coating film is arranged at the top of the first reinforcing layer. Through weaving a herringbone twill weave structure with high integration degree, the density of the fabric is improved, wind prevention and warmth retention are achieved, and the toughness and the strength are ensured; through the arrangement of the anti-pilling coating film, the wear resistance is improved and pilling of the surface is avoided; the fabric is comfortable to wear and good in skin-friendly effect; fiber burrs are treated by using a fiber treatment agent before knitting, a blended yarn is dried by using a hot air blower and spool replacement through winding the blended yarn is completed, so that the strength, flexibility and cleanness of the blended yarn are enhanced, and the possibility of fiber breaking and pilling is reduced; and the burrs of the fabric are removed throughsurface treatment of a basic fabric, so that smooth and even spraying and adhesion of the coating film are facilitated, and the high-efficiency anti-pilling effect and the effect of reducing defectson the surface of the fabric are achieved.

The invention relates to a production method and a system for preparing seedling culture tray from straw. The system comprises a grinder, a pretreatment tank, a second screw conveyor, a dryer, a seedling culture tray mixing tank and a compression moulding press. The pretreatment tank comprises a pretreatment mixing tank, a first screw conveyor and a microorganism anaerobic fermentation tank. A methane monitoring alarm and a liquid level detection alarm are arranged on upper and lower portions of the wall of the pretreatment mixing tank respectively, and a stirrer is arranged in the pretreatment mixing tank. A biogas storage gas film is arranged above the microorganism anaerobic fermentation tank and provided with a gas hole, and a gas bag for biogas storage is arranged above the biogas storage gas film. A plurality of paddle agitators are arranged in the microorganism anaerobic fermentation tank, an outlet of the second screw conveyor is connected with an inlet of the dryer, an outletof the dryer is connected with an inlet of the seedling culture tray mixing tank, and an outlet of the seedling culture tray mixing tank is connected with the compression moulding press. A rural ecological environment can be improved to a great extent, and cleanness and harmlessness of the rural ecological environment are truly realized.

The invention discloses a high-strength high-toughness low-alloy steel wire which comprises the following components in percentage by mass: 0.03-0.09% of C, 0.1-0.5% of Si, 0.9-1.5% of Mn, 0.5-0.9% of Mo, 2.2-2.8% of Ni, 0.3-0.7% of Cr, less than or equal to 0.01% of P, less than or equal to 0.01% of S and the balance of Fe and inevitable impurities. The invention also discloses a preparation method of the wire, which comprises the following steps: a, carrying out vacuum melting on the raw materials with a designed ratio to obtain a cast ingot; B, forging the cast ingot to obtain a bar; C, rolling the bar to obtain a wire rod; and d, annealing the wire rod, and then drawing the wire to obtain the wire . The high-strength high-toughness low-alloy steel wire can adapt to an inert gas environment in laser additive manufacturing, does not need special deoxidation and deslagging, can continuously work, does not need copper plating, and is environment-friendly.

The invention discloses a low-carbon low-boron low-chromium alloy steel, and a preparation method thereof, and belongs to the technical field of alloy steel manufacturing. According to the preparationmethod, low-carbon low-boron low-chromium materials are combined with cerium rare earth, vanadium, tungsten, copper, tantalum, cobalt, niobium, and the like, technical target value determination, material preparation, melting, sampling adjusting, casting moulding, and heat treatment are carried out so as to obtain the low-carbon low-boron low-chromium alloy steel at last; the hardness is HRC42-52, the impact energy is as high as 11 to 20 joules. The preparation method is capable of guaranteeing the certain hardness of the alloy steel, and at the same time, improving the impact resistance, thetoughness, and the wear resistance greatly.

The invention discloses a low-chrome wear-resistant alloy steel, and a preparation method thereof. The preparation method comprises following steps: technology target value determination, material preparation, melting, sampling and adjusting, casting and moulding, and hot treatment. The low-chrome wear-resistant alloy steel comprises, by weight, 0.25 to 0.35% of carbon, 0.6 to 1.5% of silicon, 0.8to 1.3% of manganese, phosphor<0.04%, sulfur<0.04%, 1 to 3.5% of chromium, 0.1 to 0.5% of nickel, 0.1 to 0.3% of molybdenum, 0.03 to 0.25% of boron, 0.1 to 0.3% of aluminium, 0.1 to 1.2% of cerium, 0.02 to 0.1% of tin, and the balance iron. According to the preparation method, both wear resistance and hardness requirements are satisfied, the toughness is increased greatly, impact resistance is excellent, impact energy is as high as 5 to 8 joules, and cobblestones can be crushed using the low-chrome wear-resistant alloy steel easily.

The invention discloses an abrasion-resistant flux-cored wire. The abrasion-resistant flux-cored wire comprises a carbon steel sheath and powder filled into the carbon steel sheath. The powder comprises 0.03 to 0.09% of Cr, 0.05 to 0.11% of Mo, 1.1 to 1.7% of Mn and 1.3 to 1.9% of Si, based on the total weight of the wire.The abrasion-resistant flux-cored wire has following beneficial effects: by rigidly controlling components and the content of powder, an electric arc is stabilized and the amount of welding slag on the surface of a welding pass is greatly decreased, thereby effectively controlling the amount of welding slag; the flux-cored wire is added with C so that strength of welded metal is ensured and abrasion-resistant degree is further improved; the flux-cored wire is added with Si in order to decrease the oxygen content in deposited metal and improve mobility of deposited metal; and by utilizing the flux-cored wire, good stability is achieved and a welding surface becomes complete and neat.

The invention relates to the technical field of electrode wire machining, and concretely relates to a composite electrode wire, and a preparation method and application of the composite electrode wire. A conductive alloy core material is directly sleeved with a brass tubular outer material, then pressure cold wrapping is conducted to make the conductive alloy core material and the brass outer material directly and concentrically wrapped into a whole, then drawing, annealing and wire drawing treatment are carried out to make the core material and the outer material form the final composite electrode wire, and a zinc material coating can be sprayed on the surface of the composite electrode wire, so the technical problems that the surface of an existing composite electrode wire is not glossy, and the overall strength is low are solved.

The invention discloses a preparation process of a metal wear-resistant alloy flange, and particularly relates to the technical field of flange manufacturing. The preparation process comprises the following steps of raw material preparation and casting raw material preparation, specifically, raw materials comprise 0.8-1.2% of carbon, 0.6-0.8% of silicon, 18-22% of chromium, 2.2-3.2% of manganese,0.2-0.6% of vanadium, 0.01-0.03% of phosphorus, 0.4-0.8% of nickel, 0.2-0.5% of molybdenum, 0.2-0.4% of nitrogen, 0.06-0.08% of zinc and the balance copper, iron and inevitable impurities. According to the preparation process, an inner core layer and a high-chromium cast iron shell are arranged, so that the weight of the flange manufactured through the preparation process can be obviously reducedwithin a certain range on the premise that the hardness and the strength of the flange are not affected, moreover, carbon fibers can be selected from some leftover materials in a carbon fiber production workshop, and the material cost is low; and compared with a traditional metal flange preparation method at present, the flange prepared through the preparation process is formed by combining the high-chromium cast iron shell and the inner core layer, so that the flange has the advantages of being high in strength, toughness and wear resistance, low in manufacturing cost, small in weight and convenient to carry and transport.

The invention discloses a concrete tunnel lining material which is prepared from cement, fly ash, polyethylene chopped fibers, polypropylene profiled fibers, a fiber dispersion bonding aid, a hydration regulator, a polycarboxylate superplasticizer, water and sand, does not have reinforcing bars and can be constructed by virtue of 3D printing equipment. The invention also discloses a preparation method of the material. According to the material, construction of primary lining can be rapidly completed by means of 3D printing equipment after tunnel excavation, the lining concrete has the characteristics of no reinforcement, ultra-thinness, toughness, crack resistance and the like, the construction automation degree is high, the material variability is small, the inner contour surface is flatand smooth, the tunnel lining structure is compact in contact with an original excavation face of a tunnel and free of gaps, surrounding rock above the grade II or above can be directly used as a permanent lining, the surrounding rock of the grade II or below, a waterproof interlayer and a secondary lining can jointly form a composite lining, and therefore long-term safety and comfort of a tunneloperation space are guaranteed.

The invention discloses a slasher, with high drying performance, for performing double-dipping and quartic-pressing on wet slashed yarns through roller warp beams. The slasher structurally comprises an industrial control base, a supporting cushion transporting platform, a roller rod group groove, a double-dipping and quartic-pressing oven, an I-shaped roller winding frame, an inner pressing revolving column and gearboxes. The slasher achieves the purpose that by the matching between the roller rod group groove and the double-dipping and quartic-pressing oven, the effect of upper-section, middle-section and lower-section four-layer desizing decrement is formed, sized hairiness is subjected to slurry infiltration to enable the fiber to be adhered and ensure the film toughness, the middle-section upper-surface lower-surface squeezing operation is performed, then filtering slurry falls and smoothly flows back to a large soaking groove tar, the recycling of materials is ensured, the interference on the yarn quality due to too much slurry is avoided, after a two-roller yarn pressing frame performs rolling, slashing and desizing, an oven housing is matched with a top electric heating roller to heat a baffle, the uniform heated surface under the drying matched revolving air pressure is reinforced, the roller rod group groove is connected after yarn discharging, and the flanging and hairiness of yarns are compacted and adhered, and the slasher has no impurity residuals, and the maintenance of warps is excellent.