38results about How to "Meet the tensile strength" patented technology

The invention provides a nano artificial dura mater capable of being used as a medicine sustained-release system, having the structure which comprises at least two layers, i.e. a hydrophobic anti-blocking electro-spun layer which faces the cerebrum, and a hydrophilic nano cytoskeleton layer which backs on to the cerebrum; and cell factors and/or medicines are arranged in any layer of the artificial dura mater by way of blended spinning. The invention also provides a method for preparing the nano biomimic artificial dura mater. Compared with an artificial mater prepared by the single utilization of the electro-spinning technology, the artificial mater to which the medicines and the cell factors are added by blending technology can effectively prevent infection and faster promote the regeneration process of the artificial mater. The invention also provides a novel medicine loading and releasing mode for treating cerebral diseases, the loaded medicines can be directly and efficiently transferred into the cranial cavity along with the implantation of the dura mate and can be released according to requirements, and therefore the invention realizes favorable treatment effect and has broad application prospect.

The invention discloses a high-vapor-barrier polyurethane coating for a refrigeration house and a preparation method of the high-vapor-barrier polyurethane coating. The high-vapor-barrier polyurethanecoating comprises a component A and a component B, the mixing ratio of the weight of the component A to the weight of the component B is 1:2.5, the component A comprises isocyanate and polyether glycol, and the component B comprises a fluoro acrylic resin, polyether glycol, a chain extender, a catalyst, a pigment, a filler, a dispersing agent, a defoamer and an anti-setting agent. The prepared polyurethane coating can be applied to the field of dampproofness and vapor barriering of a polyurethane external thermal insulation system, when the test shows that the thickness of a coating film is more than 1 mm, the moisture-vapor transmission rate is 7.5*10<-9> g/m<2>.S.Pa, the high-vapor-barrier polyurethane coating has an excellent binding force with a polyurethane foam and concrete, and thebonding strength is higher than 1 MPa.

The invention discloses a preparation method of heat-not-burn dry reconstituted tobacco. The preparation method comprises the steps of substrate preparation, coating and drying, and further comprisesthe step of drying and calendering treatment. By adjusting the proper calendering pressure and calendering temperature, the physical properties of the heat-not-burn dry reconstituted tobacco are improved, and the processing requirements of the forming process are met; the deformation coefficient of a formed material rod is small, a smoke producing agent is formed by adding coating liquid to be combined with added glycerol, and the drying temperature is adjusted so that it can be guaranteed that the content of glycerol in a product can reach the standard, and processing adaptability indexes such as tensile strength of the heat-not-burn dry reconstituted tobacco can also be met. The smoke producing agent content of the prepared dry reconstituted tobacco can reach 19.53%, the tensile strengthof reconstituted tobacco before calendering is 0.315 KN/m, the tensile elongation of reconstituted tobacco before calendering is 6.05%, the tensile strength of the dry reconstituted tobacco after calendering reaches 0.5337 KN/m, and the tensile elongation of the dry reconstituted tobacco after calendering is 11.13%.

The invention discloses a motor rotor web crack welding repair method and solves the problems that a saw-toothed or crescent electrode is originally used to increase bath width and weld width, thermal stress is large and cracking occurs easily. A linear electrode manipulation method is adopted, a low-current small width welding method is adopted, arc ending is slow, a segment is re-welded to fill an end arc pit, the weld shape is changed, and cracking is avoided accordingly. A welding electrode A507 with higher tensile strength is used, a series of welding processes is taken, and the tensile strength of special equipment and special welds is met. The use of symmetric welding prevents excess welding stress effectively.

The invention relates to an anchor cable made of a continuous basalt fiber composite rib material. The anchor cable comprises a grouting pipe (1), a steel strand (6), a prestress appplying anchor device, a continuous basalt fiber composite rib bundle (2), a flange connection structure and a PVC pipe (12). The anchor cable connects the continuous basalt fiber composite rib bundle with the steel strand together via the flange connection structure and the prestress appplying anchor device. The continuous basalt fiber composite rib bundle is installed in the PVC pipe by a plurality of uniformly distributed positioning centralizers (3). A section of anchoring slurry injection pipe is embedded in the grouting pipe, and anchoring slurry flows into the flange from the pipe to tightly connect the continuous basalt fiber composite rib bundle and the steel strand. The anchor cable made of the continuous basalt fiber composite rib material can replace steel strands, high-strength steel wires and the like to become a main tensile rib material; while tensile strength is met, lower shear strength is provided, and thus, residual anchor cable steel in the soil layer can be easily cut during later construction of surrounding projects.

The invention discloses a structure for reinforcing corroded concrete through a prestress fiber reinforced composite sheet and a reinforcing method. The structure comprises a concrete member (3) to be reinforced, the prestress fiber reinforced composite sheet (1), stretching end anchorage device anchor bolts (5), a stretching end anchorage device (7), fixed end anchorage device anchor bolts (6), a fixed end anchorage device (8), non-prestress fiber reinforced composite sheets (9) and an external intermittent constant-current power source (11). The stretching end anchorage device (7) and the fixed end anchorage device (8) clamp the two ends of the prestress fiber reinforced composite sheet (1) correspondingly and fix the prestress fiber reinforced composite sheet (1) to the upper surface of the concrete member (3) to be reinforced. An inner reinforcement cage (4) is arranged in the concrete member (3) to be reinforced. According to the structure and the reinforcing method, the corrosion problem of steel bars and prestress anchorage devices in a concrete structure in the corrosive environment is solved, an auxiliary anode is resistant to corrosion and easy to replace, a reinforcing effect is achieved on the concrete structure, and the repairing cost is remarkably reduced.

The invention belongs to preparation methods for martensite steel, particularly relates to a preparation method for low activity ferrite/martensite steel for a fusion reactor, which includes the following steps: step 1 ferrum-wolframium (Fe-W) master alloy is prepared, and mass percentage of W in the Fe-W master alloy is smaller than or equal to 20%; step 2 ingredients are added according to preset proportion and comprise chromium, manganese, vanadium, carbon and tantalum, first smelting of alloy is conducted by adopting a vacuum induction smelting method, and the ingredients all adopt high-purity materials; step 3 vacuum self-consuming remelting is conducted; and step 4 hot working is conducted. The method has the advantages that the low activity ferrite/martensite steel prepared through the method meets requirements in aspects of tensile strength, yield strength and elongation coefficient and simultaneously meets a requirement of low activity for the fusion reactor.

The invention discloses high-nickel austenite nodular cast iron. The high-nickel austenite nodular cast iron is characterized in that the austenite nodular cast iron comprises the following chemical components in percentage by weight: 2.35-2.7% of carbon, 1.75-2.0% of silicon, 0.7-0.9% of manganese, smaller than or equal to 0.05% of phosphor, 18-19.5% of nickel, 1.75-1.9% of chromium, 0.05-0.065% of magnesium and the balance of iron. The production technique for the high-nickel austenite nodular cast iron comprises the following steps of material preparation, medium-frequency furnace smelting, sampling analysis, molten metal outlet nodulizing, inoculation treatment, solid solution strengthening and ageing treatment. According to the high-nickel austenite nodular cast iron and the production technique, a casting with qualified mechanical performance can be obtained through the reasonable production technique, and the casting is applicable to long-term stable production; a substrate texture is strengthened through thermal treatment modes of solid solution strengthening and ageing treatment, and the tenacity of the substrate texture is enhanced; the grains are refined; segregation is omitted; internal stress is lowered; and therefore the texture and performance are more uniform, and the requirement of corrosion resistance, especially sea water corrosion resistance is met.

The invention discloses a preparation method of a rare earth microalloyed shock-resistant hot-rolled H-shaped steel, which includes: during the smelting process of the converter, controlling the w[S] of the molten iron in the converter to be ≤ 0.009%, increasing the tapping temperature of the converter to about 1600°C, Control the amount of slag in the converter; extend the refining time of the LF furnace during the LF refining process; during the VD vacuum refining process, the argon blowing time of the VD furnace should not be less than 10 minutes; the casting speed range of the continuous casting machine is 0.80m/min~0.9m/min, The superheat degree of the steel type is less than 25°C; in the rolling process, the heating temperature is 1210-1250°C, the starting rolling temperature is ≤1200°C, and the final rolling temperature is 870-890°C to obtain H-shaped steel. The invention also discloses a rare earth micro-alloyed shock-resistant hot-rolled H-shaped steel. The invention adopts the narrow component design, and the obtained H-shaped steel can meet the requirements of the yield strength and tensile strength of the shock-resistant hot-rolled H-shaped steel.

The invention belongs to martensitic steel and particularly relates to low-activity ferritic/martensitic steel for a fusion reactor. The low-activity ferritic/ martensitic steel comprises the following components in percentage by mass: 8.3 to 8.7 percent of chromium, 1.45 to 1.6 percent of tungsten, 0.35 to 0.60 percent of manganese, 0.09 to 0.11 percent of tantalum, 0.24 to 0.28 percent of vanadium, 0.10 to 0.12 percent of carbon, 0.025 to 0.051 percent of nitrogen and the balance of ferrum. The invention has the advantages that the low-activity ferritic/martensitic steel prepared from the components can fully meet the requirement in the aspects of tensile strength, yield strength and elongation, and meets the requirement of the fusion reactor on low activity.

The invention discloses a glass curtain wall single body. The glass curtain wall single body is formed by combining m pieces of standard glass, n pieces of non-standard glass and structural frame lines; the shape of each piece of the standard glass is a rectangle or a square; the structural frame lines are regularly hexagonal, rectangular or trapezoidal; the n pieces of the non-standard glass are positioned in the gaps formed by the peripheries of the m pieces of the standard glass and the structural frame lines; m and n are even numbers between 4 and 12. A honeycombed outwards-convex-type irregular curtain wall is formed by combining p glass curtain wall components; in construction, an integrated honeycombed outwards-convex-type irregular curtain wall structure is formed by connecting every two triangular glass curtain walls with unequal sized planes along equal sides; p is an integer which is greater than 3. The glass curtain wall single body is a plane structural component; the construction process is mature; the glass curtain wall component formed by a plurality of glass curtain wall single bodies is honeycombed and is attractive in appearance; a plurality of adjacent glass curtain wall surface components form the integrated honeycombed outwards-convex-type irregular curtain wall structure; a special-shaped glass curtain wall structure is simplified by using a mature plane glass curtain wall process.

The invention relates to the technical field of metallurgy, and particularly discloses a non-tempered N80 steel-grade petroleum casing pipe and a preparation method thereof. The non-tempered N80 steel-grade petroleum casing pipe comprises the following components in percent by weight: 0.28-0.32% of C, 0.25-0.40% of Si, 1.55-1.70% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.008% of S, 0.011-0.020% of Nb, 0.05-0.08% of V, 0.007-0.013% of Ti, 0.010-0.040% of Al, 0.013-0.017% of N, smaller than 0.10% of Cr, smaller than or equal to 0.10% of Ni, smaller than or equal to0.10% of Cu, smaller than or equal to 0.020% of As, smaller than or equal to 0.020% of Sn, smaller than or equal to 0.01% of Pb, smaller than or equal to 0.01% of Sb, smaller than or equal to 0.01% ofBi, smaller than or equal to 0.035% of Sn, As, Pb, Sb and Bi and the balance of Fe. Through component adjustment and technology optimization, design requirements on the tensile strength, the yield strength, the elongation and the impact energy of the N80 steel-grade petroleum casing pipe are met; the non-tempered N80 steel-grade petroleum casing pipe is stable in performance; compared with the tempering technology, the preparation method provided by the invention has the advantages as follows: the same quality requirements are met, the production process is shortened, energy is saved, the manufacturing cost is low, and the production efficiency is improved.

The invention discloses a processing technology for half-hard phosphorous deoxidized copper pipe, comprising following procedures. Most melting electrolytic copper and iron element with the content of 0.045%-0.05% are added into melting furnace to be melted. Then small residual electrolytic copper is added into the melting furnace to be mixed fully. Phosphor-copper master alloy is added into the melting furnace. Through quick analysis on-the-spot sample it is cast into ingot. Extrusion, rolling pipe, complete hard tension, finishing, complete recrystallization annealing, performance testing are carried out for ingot. Finally pipes are packaged and stored. The merit is that as iron element is added in the melting process, performance range requirement of HV in half-hard phosphorous deoxidized copper pipe can be guaranteed while requirements such as elongation, tensile strength, yield strength and grain size so on of half-hard phosphorous deoxidized copper pipe can be guaranteed. It is provided with stable product performance and high producing feasibility.

The invention relates to an aluminum cable steel reinforced for a power grid overhead transmission line, wherein the aluminum cable steel reinforced is low in cost, large in current-carrying capacity, good in anti-corrosion performance, high in strength, non-magnetic and low in loss. According to the technical scheme of the invention, the aluminum cable steel reinforced for the power grid overhead transmission line comprises a tensile core body and a conductor. The conductor is composed of a plurality of electrical aluminum conductor wires. The aluminum cable steel reinforced is characterized in that the tensile core body is composed of a plurality of non-magnetic stainless steel wires and the steel wires are twisted into strands. The Mn content in the non-magnetic stainless steel of the non-magnetic stainless steel wires is 10-15%, and the Ni content thereof is smaller than 5%. The N content in the non-magnetic stainless steel of the non-magnetic stainless steel wires is 0.3-0.4%. the aluminum cable steel reinforced for the power grid overhead transmission line is applied to the power engineering field.

The invention relates to a glass fiber reinforced plastic antenna housing and a preparation method of the glass fiber reinforced plastic antenna housing. The glass fiber reinforced plastic antenna housing is prepared from glass fiber yarns, a glass fiber felt, an outer felt and paste through adopting a pulling-extruding process, wherein the paste is prepared from the following raw materials in parts by weight: 95 to 105 parts of pulled-extruded m-phenylene resin, 3 to 5 parts of glass mciro-bead, 1 to 3 parts of an internal releasing agent, 8 to 12 parts of lightweight active calcium carbonate, 4 to 6 parts of aluminum hydroxide, 1 to 3 parts of an ultraviolet absorbent, 0.4 to 0.6 part of a curing agent AMB, 0.2 to 0.4 part of a curing agent TBPB (Tetrabromophenol Blue) and 3 to 5 parts of polyethylene powder. The glass fiber reinforced plastic antenna housing has the advantages that the outer felt adopts a chopped polyester surface felt and is coordinated with other components, so that the potential of hydrogen and the weather resistance are improved; the service life can reach 200 years or more and is improved by one time or more when being compared with a common antenna housing; meanwhile, the yield of a product can also be improved; meanwhile, all the components have synergistic effect so that the performance of the glass fiber reinforced plastic antenna housing is greatly improved.

The invention relates to the field of the preparation of bipolar plates for power supplies, and particularly relates to a plastic bipolar plate and a preparation method thereof. The bipolar plate is prepared from three parts of a conducting material, a resin material and a functional material. The preparation method comprises the following main steps of forcibly mixing the conducting material, theresin material and the functional material, which are in a certain proportion, in a high speed ball mill, and carrying out compression molding on the uniformly mixed materials in a mold at a high temperature, so as to obtain the novel plastic bipolar plate. The plastic bipolar plate can be used for resolving the contradiction between the conductivity and the mechanical performance of a conventional plastic bipolar plate; while the strength and the corrosion resistance of the bipolar plate are improved, the conductivity of the bipolar plate is further ameliorated; further, the bipolar plate prepared by the method has the characteristics of being simple in process and low in raw-material and equipment cost, and the large-scale industrialized production is easily realized.

The invention relates to a production process of a high-temperature structural ceramic/metal composite material tube for an aluminum alloy die casting machine. The composite material tube comprises a ceramic lining, a metal jacket and an end cover. The production process of the composite material tube comprises the steps of machining the ceramic lining, machining the metal jacket and the end cover, and assembling and matching the ceramic lining, the metal jacket and the end cover. A ceramic lining machining process comprises the steps of raw material preparation, grinding and pulping, workpiece forming, green body drying, high-temperature firing and inner and outer circle machining. A metal jacket and end cover machining process comprises the steps of metal tube and end cover cutting and blanking, metal tube and end cover inner and outer circle rough machining, heat treatment and metal tube and end cover inner and outer circle finish machining. A ceramic lining, metal jacket and end cover assembling and matching process includes the steps of measurement inspection, combined assembly and thermal adaptation testing. A metal tube and a ceramic tube are compounded, so that the alloy melt corrosion resistance and the wear resistance of the material tube are greatly improved, and the service life is long; the composite material tube is low in heat conductivity coefficient, and energy consumption is reduced; and strength and toughness are good, the manufacturing cost is low, and production period is short.

The invention provides an improved umbrella stand structure, which comprises an umbrella handle and an umbrella barrel. A fixed nest, a sliding nest and a handle sleeve are arranged at the umbrella handle. The bottom of the umbrella handle is arranged in the inner part of the umbrella barrel through the top of the handle sleeve. The umbrella framework comprises a main bone, a tail bone and a fulcrum, wherein the main bone and the tail bone are fixedly connected with a connector. The two ends of the supporting bone respectively have rotary connection with the main bone and the sliding nest. The supporting bone is connected with a pull handle near the main bone. When the improved umbrella stand structure is utilized, the tail bone can be folded up conveniently through the connector. Furthermore, the sliding nest slides downward along the umbrella handle, and the umbrella handle is integrally inserted into the umbrella barrel. The additional umbrella barrel can contain rainwater and avoid the wet of clothes. Meanwhile, the additional umbrella barrel plays the role of increasing the height and strength of the umbrella handle. The improved umbrella stand structure has the advantages of being simple in structure, convenient in operation, intimate in design and wide in market prospects.

The invention belongs to the technical field of preparation of agricultural mulch films, in particular to a method for preparing agricultural mulch film for sound-absorbing cotton leftover scraps usedin vehicles. The preparation method comprises the steps: a step of pulverization of sound-absorbing cotton leftover scraps used in vehicles, a melting and granulating treatment step, a mixed treatment step of low-density polyethylene, polypropylene and liquid paraffin and a step of granulating the all materials through a screw extruder and blowing the materials into a mulch film with the thickness of 0.004mm to 0.1mm through a film blowing machine. Accordign to the degradable agriculture mulch film disclosed by the invention, the sound-absorbing cotton leftover scraps used in vehicles are used as one of the raw materials, and materials such as modified tapioca starch, a photosensitizer cerium stearate powder, a hindered phenolic antioxidant and a thermal degradation enhancer are added, sothat the degradable capability of the mulch film is improved, the degradation time of the mulch film is effectively controlled, the degradation effect is achieved, the production cost is reduced, andwhite pollution is reduced.

The invention discloses a 500MPa flux-cored wire and a preparation method thereof. The 500MPa flux-cored wire is prepared from a low-carbon steel strip and flux powder. The flux powder is wrapped in the low-carbon steel strip. The flux powder comprises, by mass, 2-8 parts of arc stabilizer, 1-5 parts of catalyst, 5-15 parts of silicon-manganese alloy, 5-10 parts of ferrosilicon, 5-15 parts of electrolytic manganese and 55-75 parts of reduced iron powder. The 500MPa flux-cored wire is low in manufacturing cost. The welded surface has no molten slag. Slag removal is not needed during multilayerand multi-pass welding. The welding efficiency is greatly improved. The 500MPa flux-cored wire is environment-friendly in the welding process, small in welding spatter, small in smoke dust, high in cladding efficiency and capable of being popularized to robot welding and has wide development prospects.

The invention relates to a tripping connecting rod and a production process thereof. The tripping connecting rod comprises a core rod body with hinge structures at two ends and an insulating cladding wrapping the outer side of the core rod body. The insulating cladding is fixedly connected with the core rod body. Compared with the prior art that the tripping connecting rod is integrally processed and formed by one material, the tripping connecting rod is divided into two parts, namely the core rod body and the insulating cladding wrapping the outer side of the core rod body, so that the core rod body can be made of a material with higher tensile strength, and the tripping connecting rod can meet the standard of the tensile strength; in addition, the insulating cladding wrapping outside enables the tripping connecting rod to integrally meet the insulating requirement, so that long-term effective operation of the tripping connecting rod is guaranteed, and breakage accidents are avoided.