31results about How to "High toughness and good" patented technology

The invention discloses a high-temperature resistant and acid-and-alkali resistant industrial filter cloth material. The high-temperature resistant and acid-and-alkali resistant industrial filter cloth material is prepared from the following raw materials in parts by weight: 30 to 60 parts of tetrafluoroethylene-hexafluoropropylene copolymer, 30 to 60 parts of polyphenylene sulfide, 20 to 30 partsof ethyl alcohol, 20 to 30 parts of distilled water ethanol, 10 to 15 parts of polyester, 1 to 5 parts of polytetrafluoroethylene powder, 1 to 3 parts of chromic oxide, 10 to 15 parts of polydiphenylterephthalate propane ester, and 1 to 5 parts of graphite powder. Besides specific advantages of a common filter cloth material, the industrial filter cloth prepared by the treatment process providedby the invention has very high wear resistance, very high cost performance, high resilience and good anti-static property; the cloth which is woven by doubling and twisting multi-strand yarns is dense, high in particle retaining property, and high in stripping property and air permeability. The series of products have the characteristics of acid resistance, alkali resistance, high strength, highfiltering capacity and the like; dust is extremely cleaned; the strength, the wear resistance and the water leakage property are excellent.

The invention belongs to the field of titanium and titanium alloy preparing and machining, and particularly relates to a high-performance TA1 bar wire and a preparation method thereof. The high-performance TA1 bar wire contains smaller than or equal to 0.15 wt% of Fe, smaller than or equal to 0.15 wt% of O, smaller than or equal to 0.05 wt% of N, smaller than or equal to 0.10 wt% of C, smaller than or equal to 0.008 wt% of H and the balance titanium and unavoidable impurities. According to the high-performance TA1 bar wire, the tensile strength is between 350 MPa and 450 MPa, the yield strength is between 240 MPa and 380 MPa, the percentage elongation after fracture is larger than or equal to 25%, and the percentage reduction of area is larger than or equal to 60%. The high-strength, high-toughness and excellent-comprehensive performance TA1 pure titanium bar wire which is suitable for the medical field and the aerospace field and reaches the standards of imported wires is obtained bycontrolling raw material alloy elements and a heat treatment system, the use intensity of TA1 pure titanium is further improved while the excellent service performance is shown, and the wide application prospect is achieved in the engineering field.

The invention discloses a preparation method of a boron-carbide-based metal ceramic composite material. The method comprises the following steps that (1) the raw materials including, by weight, 76-96.9 parts of boron carbide, 1-5 parts of zirconium oxide, 1-4 parts of yttrium oxide, 1-5 parts of chrome carbide and 0.1-10 parts of cobalt-nickel alloy are weighed; (2) firstly, the boron carbide andchrome carbide are subjected mixed ball milling until the average particle size is 10-50 microns; a spray drying tower is used for pelletizing, particles are added into a sintering furnace for sintering for 5-12 hours at 1,400-1,600 DEG C, heat preservation is conducted for 1-3 hours, and after cooling is conducted, ball milling is conducted again until the average particle size is 15-30 microns,so that a sintering material is obtained. The prepared boron-carbide-based metal ceramic composite material has good isotropy, structure uniformity, thermal conductivity, oxidation resistance and high-temperature creep resistance.

The invention discloses a preparation method of a C / C-SIC ceramic composite material, comprising the following steps: using a cheap low-density PAN-based flat carbon felt as a precursor, and preparing a protective layer on the surface of carbon fibers through chemical vapor deposition; preparing phenolic resin, acetone, ethanol and silicon carbide powder in proportion into a slurry, immersing the carbon felt with the protective layer in the slurry and vacuumizing, then pressing for impregnating; pressing the pre-impregnated carbon felt into shape, then carrying out solidification and carbonization; then putting the carbonized precursor in a furnace, carrying out high temperature siliconizing reaction and filling to obtain a compact base substrate, and then removing residual silicon from the surface to obtain the high-performance high-density C / C-SIC ceramic composite material having a density of 2.30-2.70 g / cm<3>. According to the invention, the preparation process is simple, the raw materials are cheap, the production time and procedures are greatly reduced. The invention can be suitable for batch production and is easy to industrialization.

The invention provides a high-pressure rubber hose material with high toughness. The high-pressure rubber hose material comprises modified polypropylene and rubber and further comprises 10 to 15 parts of zinc oxide, 1 to 5 parts of EPDM rubber, 5 to 10 parts of chlorinated polyethylene rubber and 1 to 5 parts of stearic acid. Compared with the prior art, the high-pressure rubber hose material provided by the invention has the advantage of good high toughness through addition of zinc oxide, EPDM rubber, chlorinated polyethylene rubber and stearic acid.

This invention discloses a method for producing silicon nitride nanometer rod by utilizing sulfur auxiliary reaction at low temperature. In this invention, silicon powder, sublimate sulfur and sodiumazide in molar ration of 1:(2-3):(4-6) are mixed, and sealed in autoclave, under temperature of 250-300 deg.C and 23-40 MPa, reacting for 2-20hrs. The product is proceeded by acid-washing for 3-5 times to neutral pH value, then proceeded are: normal centrifugal separation and drying to obtain the one-D nanometer silicon material containing mainly alpha-Si3N4 nanometer rod. The diameter of thus produced Si3N4 nanometer rod is 70-400 Mu and its length is 300-4000 Mu. The advantages of this invention method are: low cost of raw material silicon powder, lower reaction temperature, excellent shapeof products, suitable for commercial production.

The invention relates to the technical field of preparation of modified polycarbonate resin, in particular to a high-impact resistance polycarbonate composite material and a preparation method for the same. The preparation method comprises the following steps of pre-dispersing, mixing and granulating ultrahigh molecular weight polyethylene, a compatilizer, nano-montmorillonite, a primary antioxidant and a secondary antioxidant, and mixing and granulating the granulated mixture, polycarbonate, a toughening agent, ultrahigh molecular weight polyethylene dispersed master batches, the primary antioxidant, the secondary antioxidant, a lubricating agent and a flow modifier to obtain the high-impact resistance polycarbonate composite material. The high-impact resistance polycarbonate composite material has stronger mechanical strength, ultra-strong impact strength, strong mechanical strength and high processibility, and can be applied to the high-end helmet market and explosion-proof armor materials instead of fiberglass-reinforced plastics.

The invention discloses a method for synthesizing silicon nitride nanometer material at low temperature by using solvothermal reaction, which is to mix SiCl4, NaN3 and magnesium powder according to the molar ratio of 2.8-5.8:1:0.8-2.7, or use iron powder as the reducing agent. The agent is mixed with SiCl4, NaN3 and iron powder in a molar ratio of 5.8-6.0:1:0.58-0.60, sealed in an autoclave, and reacted at 200°C-300°C for 10 hours ± 0.5 hours; the product is pickled, washed, Centrifugal separation and drying to obtain silicon nitride one-dimensional nanomaterials. The diameter of the β-Si3N4 nanorods prepared by the method of the invention is about 100 nanometers to 800 nanometers, the diameter of the nanowires is 30 nanometers to 125 nanometers; the diameter of the α-Si3N4 nanometer wires is 50 nanometers to 165 nanometers. The reaction temperature of the method of the invention is low, the obtained product has good appearance, and is suitable for large-scale industrial production.

The invention discloses a double network hydrogel, its preparation method and application. The hydrogel is composed of a first network and a second network, wherein the first network is formed by cross-linking polyvinyl alcohol and borax, and the second network is formed by cross-linking poly(acrylic acid-co-acrylamide) and iron ions. The first network and the second network are interspersed with each other. The present invention constructs the first network of polyvinyl alcohol by reacting the hydroxyl group of polyvinyl alcohol with borax, and the carboxyl anion on the poly(acrylic acid-co-acrylamide) molecular chain formed by the copolymerization of acrylic acid and acrylamide and Fe 3+ The formed ionic bond and the hydrogen bond formed between the amide group and the carboxyl group construct the second network. The hydrogel has excellent self-healing performance, high strength and high toughness, and can be applied in the field of tissue engineering.

The invention belongs to the technical field of dissimilar steel welding, and particularly relates to a welding method for X1NiCrMoCu25-20-5 and X2CrNiMoCuN25-6-3 dissimilar steel plates or tubes with thicknesses or wall thicknesses smaller than 5 mm. In order to solve the problems that embrittlement and heat cracks of a welding joint easily appear during welding of X1NiCrMoCu25-20-5 and X2CrNiMoCuN25-6-3, the invention discloses a welding method for welding X1NiCrMoCu25-20-5 and X2CrNiMoCuN25-6-3 dissimilar steel. The method comprises the following steps: step S1, performing groove processing and welding assembly on to-be-welded X1NiCrMoCu25-20-5 and X2CrNiMoCuN25-6-3 dissimilar steel base materials; and step 2, performing welding operation on the to-be-welded X1NiCrMoCu25-20-5 and X2CrNiMoCuN25-6-3 dissimilar steel base materials, wherein the welding parameter comprises a welding current value of 35-80 A. Parameters in a welding operation process are selected and controlled, so that welding on X1NiCrMoCu25-20-5 and X2CrNiMoCuN25-6-3 dissimilar steel is realized; and moreover, the welding joint with excellent welding performances is obtained.

Provided is a wire rod for use in mechanical structure connections, vehicle components, or the like, and more particularly, to a wire rod which has superior toughness without being subjected to a heat treatment, and the strength of which is ensured through a cold-drawing process. Tot his end, provided are a high-toughness cold-drawn non-heat-treated wire rod and a method for manufacturing the same, wherein the wire rod comprises in % by weight: 0.2 to 0.3% of carbon (C), 0.1 to 0.2% of silicon (Si), 2.5 to 4.0% of manganese (Mn), 0.035% or less (but not 0%) of phosphorus (P), 0.04% or less (but not 0%) of sulfur (S), the remainder being iron (Fe) and unavoidable impurities.

The invention discloses a termination box anti-corrosion processing technology and a termination box. The termination box anti-corrosion processing technology comprises the steps of carrying out pretreatment on a termination box body to be processed; coating an electrophoretic paint on the outer surface of the termination box body so as to form a primer layer; spray-coating an acrylic coating on the outer surface of the primer layer so as to form a finish paint layer; and drying the termination box body. The whole process flow is non-pollution, the utilization rate is high, the termination boxcan have better anti-corrosion and weather-proof performances, the service life of the termination box is effectively prolonged, and a terminal control device is ensured to normally work stably for along time. The invention further discloses the termination box with better anti-corrosion and weather-proof performance, so that the service life is effectively prolonged, and the terminal control device is ensured to normally work stably for a long time.

The invention discloses a method for preparing silicon nitride nanometer material at low temperature by using solid-state reaction. : 0.171-0.256 mixed evenly, sealed in an autoclave, and reacted at 60±5°C for 12±0.5 hours; or silicon powder, powdered thiosemicarbazide, sodium azide and aluminum powder in a molar ratio of 0.386-0.926:0.716 -1.193:1:0.804 mixed evenly, sealed in an autoclave, and reacted at 170±5°C for 10±0.5 hours; or silicon powder, powdered thiosemicarbazide, sodium azide molar ratio 0.386-0.926:0.716-1.193 : 1 mixed evenly, sealed in an autoclave, and reacted at 170±5°C for 10±0.5 hours; the product was washed with acid and water until the pH was neutral, centrifuged and dried, and then washed with mixed acid to remove elemental silicon to obtain silicon nitride nanomaterials. The reaction temperature of the method of the invention is low, the obtained product has good appearance and uniform diameter of nanorods, and is suitable for large-scale industrial production.

The invention belongs to the technical field of floors and in particular relates to a wear-resisting colored sand floor. According to the specific technical scheme, the wear-resisting colored sand floor comprises a foundation layer arranged on the bottommost layer and a concrete layer laid on the top of the foundation layer, wherein a plurality of embedded parts are uniformly distributed in the foundation layer; the embedded parts comprise top plates; vertical rods are fixed at the bottom of the top plates; a plurality of locking hooks are arranged on the outer walls of the vertical rods; open ends of the locking hook heads are arranged upwards; the top plates are fixed in the concrete layer; an unsaturated polyester layer is laid on the top of the concrete layer; an epoxy resin leveling layer is laid on the top of the unsaturated polyester layer; the top of the epoxy resin leveling layer is coated with an anticorrosive coating; the top of the anticorrosive coating is coated with a wear-resistant layer; the top of the wear-resistant layer is coated with an epoxy resin colored sand layer. The floor has the physical properties such as load resistance, water resistance, wear resistance, impact resistance, pollution resistance, high weather resistance and the like, has a flat surface, is bright and easy to clean, repair and maintain, does not produce cracks or raise dust and can meet the requirements of vast owners.

The invention relates to the technical field of floors, and discloses a color sand self-leveling floor which comprises a concrete basic layer, an epoxy resin priming coating, an epoxy resin leveling layer and an unsaturated polyester layer, wherein the epoxy resin priming coating, the epoxy resin leveling layer and the unsaturated polyester layer are sequentially laid on the concrete basic layer from bottom to top. The oxy resin priming coating is formed by mixing epoxy resin and curing agents, the epoxy resin leveling layer is formed by mixing epoxy resin and color sand, and the unsaturated polyester layer is formed by mixing unsaturated polyester and the color sand. The color sand self-leveling floor has the excellent physical characteristics of being high in toughness, resistant to load, waterproof, resistant to abrasion, high in impact resistance, pollution resistance and weather resistance and the like, besides, the surface of the floor is smooth and bright, cracks are not generated, dust does not accumulate, and the floor is easy to clean and maintain.

The present invention relates to a wire rod for use in mechanical structure connections, vehicle components, or the like, and more particularly, to a wire rod which has superior toughness without being subjected to a heat treatment, and the strength of which is ensured through a cold-drawing process. To this end, provided are a high-toughness cold-drawn non-heat-treated wire rod and a method for manufacturing same, wherein the wire rod comprises 0.2 to 0.3% of C, 0.1 to 0.2% of Si, 2.5 to 4.0% of Mn, 0.035% or less (but not 0%) of P, 0.04% or less (but not 0%) of S, the remainder being Fe and unavoidable impurities.

The invention discloses a tungsten-based plasma facing material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing tungsten powder and tungsten fiber by a powder mixing method which does not damage the tungsten fiber; and sintering to prepare a bulk fiber toughened tungsten-based material by a hot isostatic pressing process. The tungsten powder is one of pure tungsten powder, tungsten-rhenium alloy powder, and tungsten powder doped with carbide and oxide; and the tungsten fiber is a pure tungsten wire, a tungsten-rhenium alloy wire or the like. The tungsten-based plasma facing material has the advantages of high thermal conductivity, high melting point temperature, low sputtering yield, low hydrogen isotope retention and low vapor pressure, as well as low cost and greater toughness.

The invention discloses a preparation method of a boron-carbide-based metal ceramic composite material. The method comprises the following steps that (1) the raw materials including, by weight, 76-96.9 parts of boron carbide, 1-5 parts of zirconium oxide, 1-4 parts of yttrium oxide, 1-5 parts of chrome carbide and 0.1-10 parts of cobalt-nickel alloy are weighed; (2) firstly, the boron carbide andchrome carbide are subjected mixed ball milling until the average particle size is 10-50 microns; a spray drying tower is used for pelletizing, particles are added into a sintering furnace for sintering for 5-12 hours at 1,400-1,600 DEG C, heat preservation is conducted for 1-3 hours, and after cooling is conducted, ball milling is conducted again until the average particle size is 15-30 microns,so that a sintering material is obtained. The prepared boron-carbide-based metal ceramic composite material has good isotropy, structure uniformity, thermal conductivity, oxidation resistance and high-temperature creep resistance.