169results about How to "Dense material" patented technology

A method of spreading bamboo material without cracks and its device. First, remove bamboo green portion and outside nodes, cut open the bamboo sections, remove bamboo yellow portion and inner nodes, preheat to make bamboo sections soft, apply rollers with teeth to press and roll longitude grooves in the inner wall of bamboo material, to extend the arc length of bamboo material, thus flat bamboo material. The bamboo material could be fed along circumference of bamboo or in longitude direction, so there have two kinds of flatting devices: one has a smooth roller, a longitude toothed roller parallel to the smooth roller; another has two rows of rollers, each roller on one of rows has at least two teeth along the circumference, each end of the next roller have at least one more tooth than that of the former roller. when spreading bamboo material with more than 180íÒ,there wouldn't have cracks, then a flat bamboo plate is obtained.

The invention discloses a bonded copper wire product which uses high-purity copper wires as a matrix and is coated with a pure-palladium protective layer on the surface thereof. According to weight percentage, the bonded copper wire product contains 1.35 percent to 8.19 percent of palladium and the balance of copper; the production method of the palladium-plated bonded copper wire comprises the following steps: extraction of high-purity copper, preparation of a single-crystal copper bar, coarse drawing, heat treatment, palladium plating on the surface, fine drawing, heat treatment, surface cleaning and shunt winding. The invention abandons the traditional backward technique of application directly after drawing firstly and then electroplating, and adopts the technique that firstly, copper wires with diameter of less than 1mm are produced, then the pure-palladium layer is electroplated, and finally, the palladium-plated bonded copper wire finished product is produced by fine drawing. The bonded copper wire product can effectively improve the oxidation resistance of the bonded copper wires, ensure that the appearance of the finished product keeps silver metallic luster, and greatly prolong the quality guarantee period of the bonded copper wire product after being sealed off; in addition, the mechanical strength of the finished product is strengthened and the oxidation resistance thereof is improved, thus being beneficial to reducing the wire diameter of the bonded copper wire, shortening welding spacing and being more applicable to packaging of high-density and multi-pin integrated circuits.

The invention discloses a forging method for a main pipe blank with branch pipe nozzles used in a nuclear power station, comprising following steps: firstly, rolling the ingot body of a forged piece, pressing the ingot to form a clamping handle; secondly, upsetting the ingot; thirdly, drawing out the ingot, and determining the directions of the branch pipe nozzles; fourthly, marking the forged piece, and heating the forged piece to the temperature of 1180 to 1220 DEG C, determining the dimension of each segment to be forged according to the weight of each segment; fifthly, drawing out the straight pipe segment to the preset dimension of the forged piece; sixthly, drawing out the two branch pipe nozzles, and making sure that the angle formed by the two branch pipe nozzles is 45 DEG. The invention is advantageous in that the branch pipe nozzles configured to form an angle can be accurately forged on the pipe wall of the main pipeline, and the properties of the branch pipe nozzles are stable, thereby the main pipe blank with branch pipe nozzles accords with the design requirements of the AP1000 nuclear power station.

The invention provides a casting method of a thin-walled pipe casting with a spatially asymmetric structure. The method comprises the following steps: manufacturing a cavity sand core internally provided with a core bar and pores by utilizing animi resin sand; brushing a alcohol-based graphite coating on the surface of the sand core; after a white die is attached to the sand core, plugging a gap at the upper end of the joint of the core head and the white die by use of plaster; after the combination of the white die and the sand core is wholly soaked and coated in a water-borne quartz powder coating and then dried, removing coating layers at the head of the sand core and an exhaust port, and modeling and casting the combination. The method can be used for effectively solving the problems of deformation, uneven wall thickness, water and gas leakage and the like of a thin-walled pipe casting with a spatially asymmetric structure, and the obtained casting has the advantages of accurate size, uniform wall thickness, compact material texture, beautiful appearance and low cost. The method has the advantages of simple process, easiness for operation, low rejection rate, low labor intensity and high reliability.

The invention relates to a cold crucible vacuum inductive smelting device having an energy beam auxiliary heat source, which comprises a vacuum chamber, a cold crucible, an induction coil, a high frequency/intermediate frequency induction power supply used for supplying electric power to the induction coil, a vacuum argon-filling system, a control cabinet, a cooling system used for cooling the cold crucible, an energy beam launching head and an energy beam generator, wherein the cold crucible is arranged in the vacuum chamber; the induction coil is arranged in the vacuum chamber; the induction coil is encircled on the exterior of the cold crucible; the energy beam launching head is arranged on the top of the vacuum chamber and is positioned above the cold crucible; the energy beam generator is connected to the energy beam launching head; and the energy beam generator is used for generating an energy beam and transmitting the energy beam to the energy beam launching head. The device provided by the invention can be used for preparing the refractory metal and alloy which are characterized by accurate and uniform components, consistent tissues and compact materials.

A copper palladium alloy monocrystal bonding wire and a manufacturing method thereof are disclosed. Base material of the copper palladium monocrystal bonding wire comprises, by weight, 1.35%-10.18% of palladium, 0.0001%-0.0003% of Calcium, 0.0002%-0.0008% of Rhenium and the balance copper. The manufacturing method comprises the following steps: extracting high purity copper and high purity palladium; preparing monocrystalline copper palladium alloy rod; plating palladium on surface; coarse drawing and fine drawing; carrying out a heat treatment; cleaning the surface; shunting winding. The invention abandons the traditional technique: drawing firstly and then electroplating. In the method of the invention, the monocrystalline copper palladium alloy wire with a wire diameter of less than 3mm is produced, then palladium layer is electroplated, and finally, the palladium copper alloy bonding wire finished product is produced by drawing. By using the invention, oxidation resistance of bonding copper wire can be effectively raised; the oxidation resistance of the bonding copper wire can be equal to the oxidation resistance of bonding gold wire; shelf-life of the bonding copper wire product after being sealed off can be substantially prolonged. Mechanical strength of alloy finished products which are added elements, such as palladium, calcium, rare earth and the like, can be higher than materials produced by other ways, which is beneficial to further reduce the wire diameter of the bonding wire and shorten welding spacing, and is suitable for integrated circuit package with high-density and multi-pin.

The invention discloses a method for forming a hard mask layer, which comprises the following steps: providing a substrate; forming an initial hard mask layer on the substrate; and performing plasma processing on the initial hard mask layer to form the hard mask layer. The invention also correspondingly discloses a method for etching by using the hard mask layer. With the adoption of the method for forming the hard mask layer and the method for etching, a photoetching figure with better quality can be formed, the etching quality is improved, and the consistency of key size of figure subjected to photoetching or etching is improved.

The invention discloses a carbon film obtained by self assembly of graphene oxide or its derivatives and a preparation method thereof, and relates to a preparation method for a highly ordered carbon film. The objective of the invention is to solve the problems existing in the prior art that the combination between a carbon film and a substrate is poor, the preparation technology is complex, the cost is high, and the thickness of carbon films is difficult to control in the process of preparation. The carbon film provided in the invention uses graphene oxide or its derivatives as the raw material and is obtained through the process of self assembly. The carbon film is prepared by the following steps: dispersing graphene oxide or its derivatives in a solvent so as to obtain a solution, immersing a substrate into the solution and allowing the solution to stand at a constant temperature for assembly, wherein the temperature is in a range of 50 to 100 DEG C. The carbon film prepared in the invention has smooth surfaces, strong bonding force to the substrate and good light transmittance and mechanical properties; the modulus of the carbon film is 80 to 120 GPa, and the hardness is 7 to 9 Gpa; the carbon film is orderly orientated along the surface of the substrate, and the thickness of the carbon film is 10 nm to 2 mu m. The preparation process is controllable and concise and produces products with controllable thickness. The carbon film provided in the invention has broad application prospects in such fields as electrode materials, electronic chips, solar cells and high efficient catalysis.

The invention discloses a forging method for an ellipsoidal head ring forge piece of a third generation nuclear power plant steam generator. The manufactured forge piece comprises a bending section and a straight section; the forging method is executed by using a megaton-level free forging press, forging a dual-vacuum steel ingot into a whole straight section and then forging the straight section into the bending section by rotary die pressing by a die; the forging process comprises the following steps of: firstly, cogging: cutting a feeder head and a bottom from the dual-vacuum steel ingot; secondly, upsetting: heating work pieces to be 1220 plus or minus 20 DEG C, so that the heights of the work pieces are reduced and the diameters of the work pieces are increased after the work pieces are subjected to upsetting; thirdly, chambering: heating the work pieces to be 1220 plus or minus 20 DEG C, so that the wall thicknesses of the work pieces are reduced and the diameters of the work pieces are increased after the work pieces are subjected to chambering; and fourthly, carrying out a rotary die pressing process: heating the work pieces to be 1200 plus or minus 20 DEG C, so that the diameters of the work pieces are reduced and the wall thicknesses of the work pieces are increased after the work pieces are subjected to the rotary die pressing process. By adopting a forge piece forged by the forging method, dense material, reasonable distribution of a metal flow line and low possibility of cracking of the ellipsoidal head ring forge piece can be guaranteed.

The invention discloses a lid or a seat ring of a toilet bowl and a production technique thereof. The lid or the seat ring is produced by adopting a compression molding technique, a density plate is arranged inside, and a mixed SMC material covers the outside, thus forming a sandwich shape; the production technique comprises following steps: 1. SMC is prepared: various materials are synthesized according to a certain proportion, broken up by a high-speed blender for being completely mixed, and then prepared into a sheet shape for use; 2. a sandwich layer is prepared: the density plate is cut into required shapes and dried, thus leading the density plate not to contain moisture; the density plate is vacuated and air contained in the density plate is exhausted; the density plate is placed into a freezing case for storage; 3. compression molding is carried out: a die is heated until the temperature reaches 150 DEG C, the density plate and a certain amount of SMC are placed into the die, compressed for 3 to 6 minutes and taken out. The invention is characterized by having the advantages of good surface lustrousness and good product flatness, with weight of lighter than that of toilet lids made of pure SMC materials, adoption of the one-time compression molding technique without usage of paints, long service life and the like.

The invention relates to an alloy-doped gold bonding wire and a cryogenic-treatment preparation method thereof. The alloy-doped gold bonding wire formed by using high-purity gold as a main ingredient and being doped with high-purity silver and high-purity palladium, which is provided by the invention, is prepared from the following ingredients in percentages by weight: 60 to 80 percent of gold, 0.5 to 3.5 percent of palladium and the balance of silver. A bonding wire product has favorable oxidation resistance; an appearance is basically golden; the performance of the product is approximate to that of a pure-gold bonding wire; and the alloy-doped gold bonding wire is suitable for IC (Integrated Circuit) and COB (Chip On Board) encapsulation and high-end LED (Light-Emitting Diode) encapsulation. During the bonding of encapsulation, any gas shield is not needed; and in comparison with a gold bonding wire, the cost of the product is only approximately 3/5 to 4/5 of that of the gold bonding wire. In the preparation process of the product, the cryogenic treatment is carried out on a bonding wire twice; the arrangement of internal crystal textures of a material is improved; the physical properties of the material are enhanced; and the bonding properties of the alloy-doped gold bonding wire is improved. When the product is used for downstream encapsulation and wire bonding modes are BSOB (Bond Stitch On Ball) and BBOS (Bond Ball On Stitch), a wire stock and a ball are guaranteed to be eutectic.

The invention discloses a heat-dissipation LED stress lamp cap with high efficiency and large power, comprising an independent general lamp body consisting of a lamp body shell, an electric apparatus chamber cover, a light transmission shielding plate, an LED light source component, an optical management device, an LED driving control circuit, a lamp body upper cover, a head cover, an installation cover and a sealing ring; the lamp body shell, the lamp body upper cover and the light transmission shielding plate enclose a sealed chamber; the LED light source component is arranged in the chamber and is closely attached to the lower surface of the upper cover of the lamp body; the external side of the upper cover of the lamp body is provided with a plurality of heat dissipation ribs which are used for increasing the whole heat dissipation area of the lamp cap; the optical management device is arranged at the LED light source component; simultaneously, the lamp body shell and the electric apparatus chamber cover plate enclose another sealed chamber; the chamber body is internally provided with the LED driving control circuit. The LED street lamp cap has the advantages of scientific, reasonable and simple structure, easy production and manufacture, low cost, convenient installation and assembly, good heat dissipation effect, high luminescence efficiency and long service life.

The invention relates to a water collection and purification system, in particular to a water storage system which is firm in building and easy to construct. The water storage system comprises a water storage container, a water collection well and water permeability padding which is filled between the water collection well and the water storage container, water is filled into the water storage container through a water inlet pipe or a water permeability surface layer paved above the padding, the container wall is a seepage prevention air permeability wall which is composed of seepage prevention air permeability particles, the boundary of the seepage prevention air permeability wall is limited through air permeability wall bags, and fine sand particles are piled up on two sides of the seepage prevention air permeability wall to fix the seepage prevention air permeability wall in a squeezing mode. The container wall of the water storage system adopts the air permeability wall bags and are filled with the seepage prevention air permeability particles, thin sand are filled on two sides of the side wall to squeeze and reinforce the side wall, the water can be prevented from being leaked outwardly through seepage prevention performance of the seepage prevention air permeability particles, so that the seepage prevention performance of the water storage system is ensured, meanwhile, an air permeability degree of the whole water storage system is also ensured through the air permeability performance of the seepage prevention air permeability particles, and the stored water is enabled not to go bad easily.

The invention discloses a method for processing gear by inlaid-pressure formation, which comprises the following steps of: manufacturing tooth-shaped inserts with a number identical to that of tooth channels; manufacturing two insert bases with radial guide grooves on the inner sides; arranging the tooth-shaped inserts in the radial guide grooves of the insert bases to surround the to-be-processed surface of a gear blank workpiece; and applying a radial pressure to the workpiece at the periphery of the tooth-shaped inserts by pressurization equipment to make the workpiece inlaid in the front edge notch of the tooth-shaped inserts while extruding the workpiece, so that the surface of the gear blank material locally deforms to form the gear. The method has the advantages of simple steps, no need for rotating the workpiece, no cutting, one-step formation, accurate size precision, high efficiency, short manufacture time (only a few seconds), high yield and low cost. The tooth-shaped insert has simple structure and only bears the pressure, thus improving the service life. Accordingly, a gear shaft and an integral gear or a non-integral gear or a non-circular gear can be manufactured without cutting. The involute, cycloid as well as arc gear surface, and spur gear, helical gear as well as bevel gear can be achieved.

The invention discloses a composite electron transfer layer perovskite solar cell prepared by using an atomic layer deposition method and a preparation method thereof. The composite electron transferlayer perovskite solar cell is characterized in that a fullerene/titanium dioxide composite electron transfer layer prepared by using the atomic layer deposition method is used, the structural features of the cell are transparent top electrode and metal counter electrode, and small organic molecules, polymers and inorganic matters are used as hole transfer materials. The perovskite solar cell hasextremely high heat stability, and moreover the photovoltaic conversion performance of the perovskite solar cell also can be preferable.

The invention discloses a titanium-silicon-carbon interface modified SiCf/SiC wave-absorbing composite material and a preparation method thereof. The preparation method comprises the steps: putting asilicon carbide fiber prefabricated body in a constant-temperature area of a CVD furnace, and depositing a titanium-silicon-carbon interface layer on the surface of silicon carbide fibers through a chemical vapor infiltration method within a proper temperature range; and soaking in slurry containing polycarbosilane and titanium silicon carbon to be impregnated; and preparing the ceramic matrix composite material through a precursor impregnation pyrolysis method (PIP). The SiCf/SiC composite material containing the Ti3SiC2 interface is prepared, the process is simple, the cost is low, the dielectric constant of the wave-absorbing composite material is effectively regulated and controlled, and a good wave-absorbing effect is achieved.

The invention relates to a packaged phase-change energy-storage composite material with super-high thermal conductivity and a processing technology thereof and brings forward an expandable graphite/nanographene sheets combined thermal conductance enhanced packaged phase-change energy-storage composite material. The invention brings forward the structural optimal range of a packaging body, namely an expandable graphite material, used as a waxy phase-change material. The expansion rate reaches 200 times and above, and average pore size is 0.5-20 micrometers. Meanwhile, the range of ratio of the expandable graphite to nanographene sheets with high thermal conductivity is determined. The invention also brings forward a corresponding preparation technology of the composite material. Thermal diffusion coefficient of the phase-change energy-storage composite material reaches 2.9 mm<2>/s and above, and thermal conductivity reaches 6.9 W/mK and above. The thermal conductivity is nearly 30 times higher than thermal conductivity of a simple paraffin material, and energy storage density of the composite material is nearly 90% of energy storage density of the paraffin material. The phase-change energy-storage composite material has very high energy storage density and thermal conductivity, is green and environment-friendly, and has a very good application prospect.

The invention relates to a water collection purification device, in particular to a water storage system with a surface layer capable of being used for planting. The water storage system with the surface layer capable of being used for the planting comprises a water storage container, a water-collecting well and water-permeable padding, wherein the container wall is in a waterproof structure, the well wall is in a waterproof structure and the water-permeable padding fills between the water-collecting well and the water storage container. Collected water is poured into the water storage container through a water pipe, an anti-seepage breathable layer is laid on the upper layer of the water-permeable padding, the anti-seepage breathable layer is formed by anti-seepage breathable granules, pores are formed among the anti-seepage breathable granules, wherein gas molecules can pass through the pores and liquid water molecules cannot penetrate through the pores. According to the water storage system with the surface layer capable of being used for the planting, due to the fact that the anti-seepage breathable layer is arranged on the top surface layer of the water storage container, on the one hand, planting moisture can be prevented from permeating and polluting stored water quality, on the other hand, air permeability of the anti-seepage breathable layer can guarantee the quality of water of the whole water storage system. The water storage system with the surface layer capable of being used for the planting can be effectively applied to water storage of cultivated wetlands.

The invention provides carbide-containing high-strength high-toughness bainite wear-resistant steel and a preparation method thereof, and relates to the technical field of wear-resistant steel. The wear-resistant steel comprises the following chemical components: 0.6 to 1.2 percent by weight of C, 1.2 to 2.5 percent by weight of Si, 0.8 to 2.0 percent by weight of Mn, 5 to 10 percent by weight of Cr, less than or equal to 0.015 percent by weight of P, less than or equal to 0.01 percent by weight of S, 0.3 to 0.7 percent by weight of Mo, 0.3 to 0.7 percent by weight of Ni and the balance of Fe and inevitable trace impurities. The preparation method comprises the following steps of firstly smelting and casting into a cast ingot according to designed components, then forging or rolling into a plate blank, and carrying out spheroidizing annealing treatment; and finally, carrying out heat treatment through an isothermal quenching process, then heating to 850 to 950 DEG C, carrying out heat preservation for 2 to 6 hours to finish austenitizing, then cooling to 310 to 380 DEG C at a cooling speed sufficient to avoid pearlite phase change, carrying out isothermal treatment for 8 to 15 hours, then transferring to an air furnace with the temperature of 200 to 280 DEG C for isothermal treatment, and finally carrying out air cooling to room temperature. A microstructure of the prepared wear-resistant steel is as follows: a matrix is micro/nano-scale bainite ferrite and film-shaped austenite which are distributed alternately, spherical carbide with the diameter of 0.5 to 2 microns is dispersed and distributed on the matrix, the volume percentage of the spherical carbide is 7 to 12 percent, and the performance is excellent.

The invention provides a functional crystallization master batch, a preparation method thereof and a waterproof material and belongs to the field of inorganic materials. The functional crystallization master batch is composed of a nanoscale calcium carbonate aluminum oxide composite powder body and chelated titanate. The preparation method includes preparing and mixing calcium carbonate powders and the nanoscale calcium carbonate aluminum oxide composite powder body. The waterproof material is composed of, by weight, 6-8% of the functional crystallization master batch, 4-6% of methyl cellulose thickening agents, 2-4% of anhydrous citric acids retarders, 25-35% of finely grinding quartz sands, and the balance cements. The functional crystallization master batch has excellent crystallization performance and usage performance, the preparation method is simple, low in production cost, safe in operation and suitable for industrial production, and the waterproof material has excellent impermeability pressure, compression strength and rupture strength.

A central sprue cavity of pressig die is composed of raw material staying tray, sprue cup, and internal sprue consisting of upper segment whose cross-section is gradually decreased and lower segment whose cross-section is gradually increased. Its advantages are low pressure to die and die locking force, and easy breaking off of prue on demoulding.