49 results about "Toughness" patented technology

The invention relates to a 3D printing modified polyamino acid material. Raw materials for preparing the 3D printing modified polyamino acid material comprise, by weight, 75-85 parts of polyamino acid, 1-5 parts of a chain extender, 1-5 parts of a crosslinking agent, 0.5-1 part of a nucleating agent, 5-10 parts of a toughening agent, 0.1-0.5 parts of a thermal stabilizer, 1-5 parts of a reinforcing agent and 0.3-0.8 parts of an antioxidant. A low temperature crushing mixing reaction technology is used to modify polyamino acid, so the toughness, the impact strength and the thermal deformation temperature of the modified polyamino acid are greatly improved, thereby the polyamino acid material has a good application prospect in 3D printing.

The invention provides a thick steel board exhibiting low tensile ratio and high toughness, which contains following elements: 0.03-0.15 weight percent of C, less than 1.0 weight percent of Si (0 weight percent not included), 1.0-2.0 weight percent of Mn, less than 0.015 weight percent of P (0 weight percent not included), less than 0.010 weight percent of S (0 weight percent not included); 0.005-0.060 weight percent of Al, 0.008-0.030 weight percent of Ti; 0.0020-0.010 weight percent of N, and less than 0.010 weight percent of O (0 weight percent not included). The microscopic constitution at the t/4 position of the steel board comprises mixed constitution of ferrite and bainite, wherein t represents thickness of the steel board. Island martensite is dispersed in the bainite, the average particle diameter of the ferrite is 10-50 mu m, and the island martesite in the bainite is 1-20 area percent of the total area.

Ultrahigh-toughness concrete and a preparing method thereof are disclosed. The concrete is prepared from, by weight, 380-580 parts of cement, 150-170 parts of slag powder, 250-380 parts of fly ash, 200-400 parts of quartz sand, 13-15 parts of bamboo wood phenolic alcohol liquified resin, 13-18 parts of polypropylene resin, 0.5-1.5 parts of carboxymethylcellulose, 23-47 parts of core-shell acrylic acid elastic emulsion, 5-10 parts of a chemical-resistant modifier, 14-18 parts of bamboo fibers, 2.5-8.5 parts of nanometer silicon particles, 7-13 parts of nanometer calcium carbonate, 3-5 parts of anionic polyacrylamide, 3.7-8.3 parts of poly(diallyldimethylammonium chloride), 0.4-1 part of poly(ethylene glycol) acrylate, 20-30 parts of an acrylic emulsion, and the like. The ultrahigh-toughness concrete has high tensile strength, high compressive strength, ultrahigh ductility, good energy consumption capacity and good elastic modulus.

The invention discloses a high-strength environment-friendly composite board which is characterized by being prepared from the following raw materials in parts by weight: 5-10 parts of debregeasia orientalis powder, 5-10 parts of corncobs, 20-30 parts of bamboo powder, 5-10 parts of wollastonite powder, 5-10 parts of brucite fibers, 0.5-1 part of sodium lignosulfonate, 0.5-1 part of polyethylene wax micropowder, 0.1-0.2 part of sodium benzoate, 0.5-1 part of a titanate coupling agent TMC-201 and 10-20 parts of a bonding aid. The composite board has high strength, high toughness and excellent impact resistance, and is strong in water-proof and corrosion-proof performances, good in durability, stable in property, uniform in texture, good in use performance, wide in raw material source, low in price, simple in process, environment-friendly, nontoxic, harmless, economic and practical.

A preparation method of high-strength cast aluminum alloy is characterized in that the cast aluminum alloy comprises the following components: Al, Zn, Ni, Mg, Cu, Mn, Cr and the like; the method comprises the following steps: configuration and melting of alloy; rotary injection treatment; adding of nano-scale ceramic particles; ultrasonic treatment; melt casting; solution treatment; aging treatment. Compared with the prior art, the preparation method has the advantages that the prepared high-strength cast aluminum alloy is uniform in microstructure, and excellent in combination of strength and toughness; due to the adoption of nano-particle modification and power ultrasound treatment, the problems of thick second solidification phase and non-uniform distribution in aluminum alloy casting are solved.

The invention discloses a boron-bearing chromium molybdenum nickel wear-resistant alloy comprising the following chemical components: 0.30-0.50% of C, 0.8-2.6% of B, 0.5-1.8% of Mn, 0.4-1.0% of Si, 4.0-6.0% of Cr, 2.0-4.5% of Mo, 0.8-2.0% of Ni, 3.5-5.5% of V, 0.02-0.04% of Ce, 0.02-0.04% of La, 0.10-0.20% of Mg, 0.01-0.03% of Ca, 0.05-0.10% of Ba, 0.040 or less of S, 0.040 or less of P, and balance of Fe and unavoidable impurities; the preparation steps include melting and heat treatment; the present invention aims to provide the boron-bearing chromium molybdenum nickel wear-resistant alloy which is safer, more wear resistant, and better in toughness, and also aims to provide a preparation method which is simple and easy to operate, simple in technological process and low in cost for preparation of the boron-bearing chromium molybdenum nickel wear-resistant alloy.

The invention discloses a flame-retardant polybutylene terephthalate (PBT) composite material, which is prepared by taking a mixture of montmorillonite and polytetrafluoroethylene as an organic synergistic flame retardant and cooperating with a nitrogen containing flame retardant, and a preparation method thereof. The composite material comprises the following components in percentage by weight: 45-70 percent of polybutylene terephthalate, 1-10 percent of nano-sized organic montmorillonite and 10-30 percent of glass fiber which is subjected to surface treatment, and 10-30 percent of nitrogen containing flame retardant, wherein the nano-sized organic montmorillonite is montmorillonite mineral powder processed by an alkyl intercalating agent; and the glass fiber is alkali-free glass fiber processed by a coupling agent. The preparation method comprises the following steps of mixing the components, antioxidant and lubricating agent; melting, blending and extruding the mixture by a double-screw extruder to obtain the polybutylene terephthalate composite material which has high performance and is synergistically filled by montmorillonite and glass fiber. The composite material is high in modulus, good in toughness, high in temperature resistance and high in CTI value; the processing environment is friendly; the composite material are free of halogen and phosphorus, meets an ROSH (The Restriction of the use of Certain Hazardous Substances in Electrical and Electronic Equipment) principle, and is widely applied to the field of engineering plastics.

The invention discloses a low-cost high-strength steel plate for engineering machinery, and a production method thereof. The steel plate comprises, by mass, 0.16-0.18% of C, 0.3-0.4% of Si, 1.0-1.4% of Mn, 0.016% or less of P, 0.009% or less of S, 0.4-0.7% of Ni, 0.3-0.5% of Cr, 0.01-0.03% of Nb, 0.02-0.06% of Al, 0.30-0.40% of Mo, 0.010-0.030% of Ti, 0.0016-0.0030% of B, and the balance of Fe and inevitable impurities. The components of the steel plate produced through the method are reasonably designed, and a proper amount of boron element is added to reduce the use amount of alloy elements, so the production cost is low; a two-stage controlled rolling technology is adopted to solve coarse and uneven crystal grains due to common hot rolling, so the produced steel plate has excellent comprehensive mechanical performances and uniform rolled structure, and provides a uniform original structure for subsequent heat treatment; an offline quenching heat treatment technology is adopted to make the steel plate have a martensite structure, so the strength grade of the steel plate is improved, and the plate shape of the steel plate is good; and a tempering heat treatment technology is adopted to eliminate the internal stress of the steel plate, so the low temperature toughness of the steel plate is improved, and the structure of the steel plate is uniform.

The invention discloses uvioresistant fluorocarbon metal anti-rust paint and a preparation method thereof. The uvioresistant fluorocarbon metal anti-rust paint is prepared from slurrying raw materials and paint mixing raw materials; a paint film formed by the anti-rust paint has high hardness, scratch resistance, strong adhesion, salt fog resistance, saline resistance, acid-base resistance, water resistance, oil resistance, ultraviolet light resistance, aging resistance, low temperature resistance and heat and humidity resistance; the anti-rust paint can be used on the surface of an old paint film repeatedly; and the damage to the paint film can be avoided, and the ultra strong toughness of the paint film can be guaranteed. The service life of the common paint film can be 8 to 10 years.

The invention discloses a winding pipe with a fiber reinforced polypropylene (FRPP) reinforced hollow-structure wall. The winding pipe is divided into FRPP inner layers, high-density polyethylene (HDPE) tube outer layers and HDPE adhesion layers, wherein each FRPP inner layer and the corresponding HDPE tube outer layer form a square unit tube together, and the square unit tubes are bonded together through the HDPE adhesion layers to form the whole winding pipe. According to the design of the winding pipe, on the one hand, the ring stiffness of the tubes is improved through the high-elasticity modulus of the FRPP material, on the other hand, the ring flexibility of the tubes is maintained through the toughness of the HDPE; besides, by means of the rapidly cooling crystallization property of the HDPE material, the square unit tubes of the hollow structures can be formed rapidly, the stability of the forming process for the tubes is guaranteed, and the product performance is reliable; for another, the usage of the raw materials can be lowered, the proportion of the FRPP material in the raw materials is increased, meanwhile, the product mass is reduced, and transportation is convenient; according to the winding pipe, the production process is simple and easy to implement, and production of the winding pipe of the large diameter can be achieved.

The invention discloses a disposable medical syringe needle which comprises a needle base, a hollow needle tube and a jacket, wherein the rear end of the hollow needle tube is connected with the needle base; the front end of the jacket is closed and is detachably sleeved on the needle tube; the needle base and the needle tube have an integrated structure and are once formed in an injection molding mode by using a compound material; and the compound material is composed of following resins and fillers by weight percent: 40%-79% of substrate resins, 0-10% of toughening resins and 20%-60% of fillers. According to the disposable medical syringe needle provided by the invention, the needle tube and the needle base are integrally molded by using the compound material; the compound material has higher strength, toughness and hardness; a stainless steel needle tube can be replaced by the needle tube made of the compound material; after injection is finished by medical personnel, a needle point can be burnt, so as to close a needle hole and passivate or eliminate the needle point; the possibility of the propagation of remained liquid medicine or diseases through the syringe needle is fundamentally eliminated; the risk of accident stab is reduced; and the risk of breaking the needle tube in human body is reduced by using the integrated needle tube and needle base.

The invention relates to a preparation method of special coating resin composition for polyethylene. The preparation method comprises the following steps of: adding a peroxide crosslinking agent accounting for 0.001-0.5% of low-density polyethylene into the low-density polyethylene, and mixing and granulating to prepare the coating resin for the polyethylene, wherein the peroxide crosslinking agent consists of alkyl peroxide, lipid peroxide, diacyl peroxide and hydroperoxide, each of which accounts for 55-85%/5-15%/5-15%/5-15% according to the percentage by weight; the extrusion temperature of an extrusion machine is 150-250 DEG C, and the rotating speed of a screw is 20-60r/min; and the MFR (Melt Flow Rate) of the low-density polyethylene is 5.0-10.0g/10min, and the density is 0.915-0.925g/cm<3>. The special coating resin composition has the characteristics of high strength, good toughness, strong adhesive force and uniform filing forming and the like and is mainly used for surface coating, paper-plastic lamination, a bonding layer and film lamination of plastic woven bags.

Disclosed is a heat treatment process for lowering the yield ratio of ultra-high-strength marine steel. Critical temperature quenching and high temperature short time tempering are adopted to obtain the low-yield-ratio ultra-high-strength marine steel, that is to say, the quenching temperature is Ac3+/-20 DEG C, the heat preservation time for quenching is 1.4-1.8 min/mm, the tempering temperature is Acl-(80-150) DEG C, and the heat preservation time for tempering is 0.5-2.0 min/mm. According to the heat treatment process, under the circumstance that matching of the strength and toughness of a steel plate is ensured, the yield ratio of the ultra-high-strength marine steel is significantly lowered, thereby completely meeting the requirements of a ship structure, an ocean platform, etc. which need the ultra-high-strength marine steel of the 420 MPa-690 MPa level or above the 690 MPa level.

The invention relates to the technical field of polymer materials, and concretely relates to a high-rigidity and high-toughness resin material for clothing buttons. The resin material includes unsaturated polyester resin, styrene, acrylate, rigid toughened mother powder, polyamide wax, a pearlescent pigment, an ultraviolet absorber, a promoter, an initiator and an antioxidant, wherein the rigid toughened mother powder is a special high-hardness elastomer material; the ultraviolet absorber is one of an ultraviolet absorber UV-327, an ultraviolet absorber UV-P and an ultraviolet absorber UV-9; the promoter is cobalt isooctylate or cobalt naphthenate; the initiator is methyl ethyl ketone peroxide; and the antioxidant is an antioxidant 1076, an antioxidant 164 or an antioxidant TNP. The buttons made of the resin material have the advantages of high toughness, difficulty in fracture, good rigidity and outstanding impact resistance.

The invention provides a low-aging sensitivity hot rolled plate with high strength and toughness and a manufacturing method thereof. The low-aging sensitivity hot rolled plate with high strength and toughness is composed of 0.13%-0.17% of C, 0.2%-0.5% of Si, 1.3%-1.8% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.03%-0.08% of V, 0.045%-0.06% of Cr, 0.012%-0.017% of N and 0.01-0.03% of Als by weight percentage, wherein N/V is less than or equal to 0.26, and Als is less than or equal to 1.5N+0.0012%. Smelting is realized in such a manner of converter furnace+LF+RH, and nitrogen is increased in a nitrogen blowing manner in the whole smelting process and the whole refining link of the converter furnace. The heating temperature of the blank ranges from 1100 to 1145 DEG C, the in-furnace time ranges from 180 to 360 min, and the soaking time ranges from 120 to 180min; first-stage rolling is adopted, the initial rolling temperature ranges from 1050 to 1130 DEG C, the pass deformation rate ranges from 15% to 25%, and the final rolling temperature ranges from 920 to 1050 DEG C. After being rolled, the steel plate is laid flatly and cooled until the surface temperature thereof is in the range from 500 to 700 DEG C. Consequently, the production efficiency can be improved and the raw material cost can be reduced; besides, the yield strength of the hot rolled plate is 475MPa, the tensile strength of the hot rolled plate is 641MPa, the elongation percentage of the hot rolled plate is 25%, and AKv at minus 40 DEG C reaches 104J.

The invention discloses a domestic ceramic with high toughness. The domestic ceramic comprises, by weight, 43-47 parts of china clay, 30-34 parts of kaolin, 8-12 parts of knar clay, 13-15 parts of quartz stones, 10-13 part sof spodumene, 14-17 parts of kyanite, 4-7 parts of sillimanite, 2-5 parts of silicon nitride powder, 1-3 parts of beryllia powder, 0.5-2 parts of iridium oxide powder and 1-2.5 parts of magnesium oxide powder. The invention also provides a production method of the domestic ceramic with high toughness. Cooperation of all raw materials of the domestic ceramic makes the domestic ceramic have the advantages of improved toughness, good bending strength, facilitation of reduction of the damage probability in the production, transportation and use process, and good market prospect.

Disclosed is a tempering method to yield hot work tool steel with high toughness. Disclosed is a method for tempering hot work tool steel made from, by mass %, C: 0.32-0.45%, Si: 0.01-0.8% or less, Mn: 0.1-0.8%, Ni: 0-0.8% or less, Cr: 4.5-5.6%, Mo and W, singly or in composition (Mo+1/2W): 2.0-3.5%, V: 0.5-1.0%, Co: 0-2.0%, and the remainder Fe and inevitable impurities, wherein which steel tempering method performs rapid cooling at a fast rate of 80 minutes or less from a 1020-1070°C tempering temperature to 530°C. Preferably, the steel tempering method, after rapid cooling at the fast rate described above, then performs cooling at a slower rate of 60-250 minutes to 150°C.

The invention discloses a wave-absorbing breathable environment-friendly molding. The wave-absorbing breathable environment-friendly molding is prepared from the following raw materials in parts by weight: 5 to 9 parts of calcium borate, 55 to 65 parts of high-strength gypsum, 14 to 18 parts of fibrilia, 6 to 8 parts of polyester fiber, 10 to 16 parts of adsorbed filled earth, 1 to 2 parts of terbium oxide, 1 to 2 parts of iron oxide, 8 to 12 parts of inorganic filler, 10 to 14 parts of flame retardant additives and 12 to 18 parts of an adhesive. The wave-absorbing breathable environment-friendly molding disclosed by the invention has the excellent characteristics of good wave-absorbing effect, light quality, high mechanical strength, breathability and no cracking; in addition, the molding has the advantages of smooth surface, good toughness and impact resistance, the function of adsorbing harmful substances in the air, and relatively-excellent flame retardancy and dimensional stability; meanwhile, the preparation method disclosed by the invention has the advantages that the low cost of materials is relatively low raw materials are easy to obtain, and the process is simple; the molding for decoration has a relatively-high practical value and a good application prospect.

The invention discloses a high-toughness anti-cracking rubber material for a sealing ring. The high-toughness anti-cracking rubber material for the sealing ring is prepared by using the following raw materials in parts by weight: 100 to 120 parts of ethylene propylene diene monomer rubber, 5 to 10 parts of methyl vinyl silicone rubber, 60 to 80 parts of white carbon black, 2 to 4 parts of zinc oxide, 0.15 to 0.25 part of dibenzoyl peroxide, 1.5 to 2.5 parts of sulfur S80, 1.5 to 2.5 parts of anti-aging agent MB, 0.3 to 0.5 part of accelerator TMTD, 1 to 2 parts of ethyl cellulose, 2 to 4 parts of methyltrimethoxysilane, 0.5 to 1 part of tetrabutyl titanate, 0.15 to 0.25 part of titanate coupling agent NDZ-401, 6 to 8 parts of nano-graphite powder, 4 to 6 parts of castor oil and 0.5 to 1 part of glycidyl methacrylate. The rubber material disclosed by the invention has good wear resistance and long-lasting friction-reducing performance, simultaneously has high toughness and good anti-cracking performance, is long in service life, is good in sealing performance and is suitable for being used as a sealing ring material.

The invention discloses a making process of a gold silk skin-nourishing quilt, and particularly relates to the field of processing articles for daily use. The making process includes steps: selecting cocoons, dipping, permeating, steaming, adjusting, degreasing, poking the cocoons, opening, rinsing, drawing, and detecting a quilt core. Gold cocoons are boiled through process of dipping, permeating, steaming and adjusting, so that length and toughness of subsequent silk can be ensured, and sufficient permeation of silkworm cocoons can be ensured,]; degreasing duration is shortened, so that impact on glossiness and smoothness when gold silk is corroded by degreasing powder for a long time can be avoided; a mode of drawing by four persons is adopted in the drawing process, a 'full-width plane net overlapping process is adopted, and the quilt core is fixed layer by layer in a crisscrossed manner, so that process effect of being free of renovation within 20 years is realized. Uniformity and service life of silk in all aspects of the whole quilt are ensured, displacement of a quilt batt is avoided effectively, and service life of the silk quilt is ensured.

The invention relates to the technical field of chain teeth and in particular relates to a transparent flashing polyester chain tooth, a preparation method and a zip fastener. The transparent flashingpolyester chain tooth is prepared from PET (Polyethylene Terephthalate), TPU (Thermoplastic Polyurethane) modified master batch, a lubricant, an antioxidant and an ultraviolet absorbent, wherein theTPU modified master batch is prepared from isocyanate, polyol, a chain extender, a crosslinking agent and flashing powder; the flashing powder is composed of a micron-grade prism pyramid monomer polyacrylamide layer. According to the transparent flashing polyester chain tooth, the TPU modified master batch with relatively good toughness is added into a PET material, so that the transparent flashing polyester chain tooth has good toughness and anti-impact performance; furthermore, the surface of a micron-grade prism pyramid monomer is covered with the polyacrylamide layer and the crosslinking agent participates, so that the micron-grade prism pyramid monomer is uniformly dispersed in the PET material; compared with a manner of directly adding the micron-grade prism pyramid monomer or the flashing powder into the PET material, the transparent flashing polyester chain tooth has a more uniform and bright flashing property.