49results about How to "Enhanced pinning" patented technology

The invention discloses a production method for high strength low entrainment pipeline steel. The pipeline steel contains minor constituents including C, Si, Mn, P, S, Nb, V, Ti, Al, Cr, Mo, Ni, Cu, W, Hf, rare earth (La+Ce), B, N and the balance of Fe and inevitable impurity elements. Tissues of a reeled steel plate comprise 93-95% of acicular ferrite, 1-2% of polygonal ferrite and 3-5% of martensite based on area rate, and the average grain sizes are 2-5[mu]m; the area ratio of tempered martensite in the thermally treated tissues accounts for 90-95%, and 2-3% of fine ferrite and 5-6% of tempered bainite are included; the yield strength after thermal treatment is 950-1060MPa, the tensile strength is 1080-1250MPa, the impact toughness at 20 DEG C below zero is 220-240J, and the ductility is 17-19%.

The invention belongs to the technical field of magnesium-lithium alloy material preparation, and particularly relates to a high-strength high-plasticity high-yield-ratio magnesium-lithium alloy and apreparation method and application thereof. The high-strength high-plasticity high-yield-ratio magnesium-lithium alloy and the preparation method and application thereof are used for solving the problems of low absolute strength, difficult matching of strong plasticity and yield ratio of the magnesium-lithium alloy, the high-strength high-plasticity high-yield-ratio magnesium-lithium alloy material with high yield ratio, good plasticity, stable quality and high purity is obtained by designing the components of the magnesium-lithium alloy, optimizing a vacuum casting process and adopting a novel deformation heat treatment process, and the magnesium-lithium alloy has an industrialized practical application prospect. According to the preparation method of the high-strength, high-plasticity and high-yield-ratio magnesium-lithium alloy, the plastic processing procedure is simple, the maneuverability is high, only medium-high temperature solution treatment and medium-low temperature deformation are needed, intermediate process annealing is not needed, the yield is high, the economical efficiency is high, and the magnesium-lithium alloy product with the tensile strength of 330 MPa, the yield strength of 314 MPa, the elongation of 16% and the yield ratio of up to 95% or above can be obtained through the method.

The invention relates to a highly corrosion resistant R-Fe-B magnet and a preparation method thereof. Surface of the magnet body is covered with fusible and corrosion resistant non-magnetic metal alloy with thickness equal to or more than 2 mum and penetration depth equal to or more than 2 mum into the body. The preparation method comprises the following steps: smelting steel ingot; crushing the steel ingot into particles; crushing the particles into powder; profiling into a cylindrical magnet; melting the alloy metal at ambient temperature of 550 DEG C and fully stirring; putting the cylindrical magnet in melt metal alloy solution during sintering for penetration of the metal alloy solution for 3h; removing the magnet from the metal alloy solution and putting the magnet in an enclosed inert gas air-cooled cooling box for gas quenching, and naturally cooling; sintering in a vacuum sintering furnace; and grinding an excircle and slicing. The magnet has strong corrosion resistance, magnet corrosion by residual liquor at air holes and needle holes is greatly reduced, and hidden trouble of inability to electroplate areas at the air holes and the needle holes by surface treatment process such as electroplating is maximally avoided.

The invention provides a method for optimizing an aluminum / steel metal inert-gas (MIG) soldered joint through a tungsten inert gas (TIG) voltaic arc cooperating with heating. The method comprises the following steps: (1) laboratory equipment is prepared; (2) a TIG welding gun is mounted beside a MIG main welding gun and mutually parallel to the MIG main welding gun; (3) acetone is adopted to wipe greasy dirt impurities off in an aluminium plate, a steel plate beveled edge and the surrounding; (4) the TIG voltaic arc is confirmed to be located beside a steel side for assisting, namely, the TIG voltaic arc heats the steel additionally in the welding process; (5) official welding is carried out; (6) and after the welding is finished, the MIG main welding gun is firstly closed, and then the TIG welding gun is closed. The method for optimizing the aluminum / steel metal inert-gas (MIG) soldered joint through the tungsten inert gas (TIG) voltaic arc cooperating with heating has the advantages that conception is ingenious, heat balance when a single voltaic arc is welded can be changed, the temperature of solid-state steel substrates can be improved, changes of form of interface compounds is promoted, an interface intermetallic compound layer is changed from the fact that the interface intermetallic compound layer singly grows to welded joints so as to form a layer shape to the fact that the interface intermetallic compound layer grows to the steel side with a high melting point in a sawtooth shape, pinning effects are enhanced, and the mechanical property of a connector can be obviously improved.

The invention relates to a biological zinc alloy with a fine lamellar eutectic structure and a preparation method thereof, and belongs to the technical field of design and manufacturing of biologicalzinc alloys. The eutectic biological zinc alloy is prepared from the following components in percentage by mass: 98.9 to 99.1 percent of zinc, 0.8 percent of aluminum and 0.1 to 0.3 percent of zirconium. The preparation method comprises the following steps: taking zinc powder, aluminum powder and zirconium powder according to designed components; carrying out ball milling for 2 to 4h at the speedof 250 to 400r / min under a protection atmosphere to obtain mixed powder; preparing the zinc-aluminum-zirconium eutectic biological alloy by adopting an SLM technology under the protection atmosphere.According to the biological zinc alloy provided by the invention, an aluminum-rich phase and a zinc-rich phase in a base body are alternatively separated out and condensed, so that the lamellar eutectic structure is generated in a zinc-aluminum alloy, and the content of zirconium is increased and can further refine the lamellar eutectic structure; in addition, the characteristic of quick solidification rate of an SLM technology is applied and can inhibit nucleation growth, thus further refining the lamellar eutectic structure of the zinc alloy; the lamellar eutectic structure is formed and refined, so that the mechanical properties of the biological zinc alloy are improved, and the application of the biological zinc alloy to the field of tissue repairing is promoted.

The invention discloses a super-strength aluminum alloy section. The super-strength aluminum alloy section comprises, by mass, 6%-10% of zinc, 0.1%-3% of copper, 1%-3% of magnesium, 0.5%-1% of silicon, 0.3%-0.6% of manganese, 0.03%-0.05% of scandium, 0.02%-0.04% of zirconium, 0.02%-0.04% of erbium, 0.03%-0.05% of lanthanum, 0.01%-0.03% of yttrium, 0.01%-0.03% of cerium, 0.03%-0.06% of titanium, 0.08%-0.1% of boron and the balance aluminum. By means of the super-strength aluminum alloy section, the comprehensive mechanical property of the aluminum alloy section is improved while it is guaranteed that an aluminum alloy has the super strength.

The invention discloses a novel reinforcement technique of a 6XXX aluminum alloy welding joint, mainly solves the defects such as high cost, large equipment and noise, complex operation, workpiece damage, additional consumption of materials and energy, additional increment of workpiece weight and residual stress, reduction of workpiece plasticity and air hole mingling in the traditional reinforcement methods of the 6XXX aluminum alloy welding joint, and achieves the reinforcement effect to the 6XXX aluminum alloy welding joint. The technique comprises the specific operation steps of solution treatment, subzero treatment and ageing treatment. The technique has the advantages of simple technique, low cost, ideal reinforcement effect, energy conservation, environmental protection and largely improved strength and plasticity, can effectively solve the problems of air holes and mingling inside the joint, and has excellent industrial application prospect.

The invention provides a low inclusion pipeline steel production method. The low inclusion pipeline steel production method is characterized in that pipeline steel comprises 0.062-0.065% of c, 0.25-0.3% of Si, 1.75-1.78% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.07-0.095% of Nb, 0.010-0.012% of Ti, less than or equal to 50% of Al, 0.5-0.65% of Cr, 0.55-0.6% ofMo, 0.2-0.25% of Ni, 0.15-0.19% of Cu, 0.005-0.008% of W, 0.0001-0.0004% of Zr, 0.0001-0.005% of Ta, 0.0001-0.0005% of rare earth (Sc+Y), 0.0001-0.0005% of B, 0.001-0.005% of N, and the balance beingFe and inevitable impurity elements, wherein the mass ratio of Sc to Y is 4-5: 1; the final structure comprises 90-92% of needle-shaped ferrite, 3-5% of polygonal ferrite and 3-5% of martensite according to the area percentage; the average grain size is 2-5 microns; the yield strength is 930-960 MPa; the tensile strength is 1050-1250MPa; the impact toughness is 150-170J at the temperature of minus 40 DEG C; and the extension rate is 17-19%. The process route comprises the steps of preparing materials according to a ratio, treating molten iron in advance for desulfuration, smelting in a converter, refining in a LF (ladle furnace), carrying out RH refining, carrying out continuous casting, rolling and reeling.

The invention provides a preparation method of a metal coating on the surface of a carbon fiber composite material, and belongs to the technical field of surface treatment of materials. The preparation method includes the following steps that firstly, the carbon fiber composite material is subjected to vacuum baking, grinding and wiping to obtain a pretreated composite material; secondly, the surface of the pretreated composite material is coated with resin metal organic hybrid paint to obtain an interface coating; the surface of the obtained interface coating is sandblasted and then sprayed with deposited metal to obtain the carbon fiber composite material with the metal coating on the surface. By means of the preparation method, the surface of the prepared metal coating is uniform and dense, and the bonding strength between the metal coating and the carbon fiber composite material is high.

An inkjet recording method comprising: shooting to a recording medium an active-light-ray-curable inkjet ink including a photopolymerizable compound, a wax, a photopolymerization initiator, and a coloring material, and that undergoes reversible sol-gel phase transition relative to temperature; and curing the ink by irradiating an active light ray to the ink that has been shot to the recording medium, wherein the ink including a (meta) acrylate compound (B) having a molecular weight of 300-1500 and a C log P value within the range 4.0 to 7.0, the wax content being 1.0-10 percent by mass of the total mass of the ink, and the temperature of the recording medium at active light ray irradiation being set such that the saturation solubility of the wax with respect to the ink constitutes 0.5 percent by mass or less. According to this image-forming method, blooming is suppressed.

The invention belongs to the technical field of superconductor preparation, and specifically relates to a superconducting joint and a preparation method thereof. The superconducting joint comprises boron powder, magnesium powder, superconductors, an outer metal sheath and an inner metal sheath, wherein the superconductors and boron powder are coated by the inner metal sheath, a low-melting-point alloy phase is formed at the junction of the inner metal sheath and the magnesium powder when heat treatment is carried out, a liquid phase can be formed when the temperature is lower than 600 DEG C, and the diffusion rate and reaction rate of magnesium for entering the boron powder are accelerated, so that the reaction of the boron powder and the magnesium powder can be conducted at a temperaturelower than 600 DEG C, the crystal grain size of a product MgB2 is reduced, the crystal boundary area is increased, and thus the pinning ability of MgB2 is improved. In addition, the setting of the inner metal sheath can enable the connection efficiency of the superconducting joint not to be limited by the shape of the superconductors.

The invention discloses a ferromagnetic / anti-ferromagnetic multilayer film pinning material and a preparation method thereof. The multilayer film pinning material comprises a substrate and a buffer layer, a ferromagnetic layer I, an anti-ferromagnetic layer and a ferromagnetic layer II arranged on the substrate, and a protective layer arranged on the ferromagnetic layer II. The preparation method comprises that the layers are deposited on the substrate in turn by adopting magnetron sputtering to obtain the multilayer film material. The multilayer film pinning material prepared by the method of the invention not only successfully realizes ferromagnetic / anti-ferromagnetic exchange bias, but also enhances the pinning performance of an anti-ferromagnetic material by using exchange coupling effect so that a ferromagnetic / anti-ferromagnetic exchange bias system is more stable and is more suitable for the application of a magneto-electronic device; and the preparation process is simple and the performance of the material is stable.

The invention discloses a carbon-ceramic brake disc with a multi-layer structure and a preparation method of the carbon-ceramic brake disc. The carbon-ceramic brake disc sequentially comprises a carbon-ceramic base body, a ceramic layer, a bottoming layer, a bonding layer and a friction layer from inside to outside, wherein the carbon-ceramic base body takes a first carbon fiber prefabricated body as a reinforcing body and takes carbon and ceramic as a base body; the ceramic layer takes a full-net tire layer as a reinforcement body and takes carbon and ceramic as a matrix; the carbon fiber prefabricated body and the full-net tire layer are connected and combined into a second carbon fiber prefabricated body through carbon fiber needling, and the friction layer is a Si / SiC composite ceramic layer and is integrally bonded with the ceramic layer and the carbon ceramic base body through the base layer and the bonding layer. According to the carbon-ceramic brake disc, the transitional ceramic layer is arranged, so that the situation that material components at the interface between the Si / SiC composite ceramic layer and the carbon-ceramic base body are not uniform is avoided, and thermal stress generated by mismatching of thermal expansion coefficients between the friction layer and the carbon-ceramic base body can be effectively relieved, and therefore, peeling of the Si / SiC composite ceramic layer in the high-speed braking process is avoided.

The invention discloses a method for producing a steel plate through the super-fast cooling technology. The method is characterized in that components comprise, by mass percent, 0.066%-0.069% of C, 0.05%-0.1% of Si, 1.5%-1.55% of Mn, smaller than or equal to 0.01% of P, smaller than or equal to 0.004% of S, 0.13%-0.2% of (Nb+Ti+V), smaller than or equal to 0.050% of Al, at least three of Cr, Mo, Ni, Cu, W and rare earth, and the balance Fe and inevitable impurity elements. According to the super-fast cooling technology, the finish rolling temperature of 845-850 DEG C is reduced to 360-365 DEGC through cooling at the cooling speed of 80-90 DEG C / s, and reeling is conducted at the temperature of 350-355 DEG C.

The invention relates to an image capture device. An image sensing unit is used for sensing an image and converting the image into a simulative image signal; an analog / digital converting unit of the image capture device converts the simulative image signal into a digital image signal; a digital signal processing unit of the image capture device optimally processes the digital image signal to generate an optimal image signal; a control unit of the image capture device controls an image sensing unit, a digital / analog converting unit and a digital signal processing unit according to a foreign command signal; a two-way transmission interface unit of the image capture device is selected from a group which comprises a low pin number interface, a serial peripheral interface and an 80 / 68 parallel interface and is controlled by a control signal to output the optimal image signal outside, and the two-way transmission interface unit also can input the command signal into the control unit. The image capture device can be matched with external devices with different sizes to operate, increase the electric connection flexibility with the external devices and reduce the no data transmission probability for the incompatibility of both interfaces.

The invention relates to a preparation method of a rare earth permanent magnet. The preparation method comprises the following steps of (1) providing first magnetic powder and second magnetic powder separately, wherein the first magnetic powder is alloy magnetic powder B; the second magnetic powder is alloy magnetic powder R or mixed magnetic powder A; the mixed magnetic powder A is obtained by mixing of the alloy magnetic powder B and alloy powder; the coercivity of a magnet prepared from the second magnetic powder is higher than that of a magnet prepared from the first magnetic powder; (2) putting the first magnetic powder in the middle part of a die, putting the second magnetic powder into the upper part and the lower part of the die, and performing hot press molding to obtain a hot pressed magnet; and (3) performing thermal deformation molding on the hot pressed magnet to obtain the rare earth permanent magnet, wherein the rare earth permanent magnet comprises a middle layer formedby the first magnetic powder and an upper layer and a lower layer formed by the second magnetic powder; and in addition, a transition layer is formed between the middle layer and the upper layer, andbetween the middle layer and the lower layer separately. The invention also relates to a rare earth permanent magnet body.

The invention provides a display device. The display device comprises a display panel; the back plate is positioned on one side of the display panel; the composite function layer is located on the side, away from the display panel, of the back plate; wherein the edge of at least one of the display panel, the back plate and the composite functional layer is provided with a microstructure. The edge of at least one of the display panel, the back plate and the composite functional layer is provided with the microstructure, so that the pinning effect and the adhesion effect among the display panel, the back plate and the composite functional layer can be effectively enhanced; therefore, the phenomenon of stripping among the display panel, the back plate and the composite function layer in the disassembly and repair process of the display device is effectively avoided, the disassembly and repair yield of the display device is improved, and the cost is reduced.

This invention relates to a preparation method for high density MgB2 super-conduction material including: grinding powders of Mg and B to be sealed in a Ta foil to be put in a heating tube to rise the temperature of 650-950 deg. C for 0.5-10 hours to be sintered for the first time to produce to a MgB2 super-conduction material to be ground to the powder of 2-3mum then to be mixed with powder of Mg and B to be sintered for the second time to get the high density super-conduction material.

A superconductor exemplarily described herein includes a superconducting material containing magnetic impurities and non-magnetic disorders formed in the superconducting material. The superconductor described herein is suitable for use in magnet applications and power transmission.

The invention provides a method for refining β grains of TC18 titanium alloy by adopting step strain rate forging process. The method comprises the following steps: (1) heating the TC18 titanium alloy forging billet whose initial structure is a two-state structure to the forging temperature in the α+β dual-phase region, and keeping it warm until the temperature of the forging billet is uniform, and then performing two-stage step strain rate forging, The forging temperature is 700-820°C, the strain rate includes two stages, and the strain rate in the first stage is 0.1-0.5s ‑1 , the strain rate in the second stage is 1~5s ‑1 , the amount of deformation in the first stage is 20-40% of the height of the blank, the amount of deformation in the second stage is 30-50% of the height of the blank, the total deformation of the two stages is 50%-70%, and the strain after the deformation in the first stage is The rate changes immediately, without interval holding time; (2) After forging, immediately quench the forging. The invention can achieve the purpose of refining the beta grains of the TC18 titanium alloy with a relatively small amount of deformation.

The invention relates to a preparation method of nano cellulose and carbon nanotube synergistically modified carbon fiber. The preparation method comprises the following steps of 1) freeze-drying a nano cellulose aqueous dispersion to obtain nanofibers; 2) preparing a nano cellulose aqueous solution and a carbon nanotube aqueous solution; 3) uniformly mixing the nano cellulose aqueous solution and the carbon nanotube aqueous solution, and depositing the mixed solution of nano cellulose and carbon nanotubes on the surface of the uniformly laid carbon fiber tows by adopting a vacuum filtration method; or sequentially carrying out suction filtration on the nano cellulose aqueous solution and the carbon nanotube aqueous solution by adopting a vacuum suction filtration method, overturning the carbon fiber tows deposited on the nano cellulose aqueous solution and the carbon nanotube aqueous solution by 180 degrees, and repeating the deposition step to obtain the nano cellulose and carbon nanotube synergistically modified carbon fiber. The interface bonding strength of the composite material can be improved by 18%-64.7% through the carbon fibers synergistically modified by the nano cellulose and the carbon nanotubes.

The invention belongs to the technical field of magnesium-lithium alloy material preparation, and specifically relates to a high-strength, high-plasticity, high-yield-ratio magnesium-lithium alloy and its preparation method and application. The present invention aims at the problems of low absolute strength of magnesium-lithium alloys and difficult matching of strong plasticity and yield ratio. By designing the magnesium-lithium alloy components, optimizing the vacuum melting and casting process and adopting a new deformation heat treatment process, high yield ratio, high yield ratio and The magnesium-lithium alloy material with good plasticity, stable quality and high purity has the prospect of industrial practical application. The preparation method of the high-strength, high-plasticity, high-yield-ratio magnesium-lithium alloy of the present invention has simple plastic processing procedures and strong maneuverability, only needs medium-high temperature solution treatment, medium-low temperature deformation, no intermediate process annealing, and high yield , economical, through this method can be obtained tensile strength of 330MPa, yield strength of 314MPa, elongation of 16%, yield ratio of up to 95% of magnesium-lithium alloy products.

The invention relates to a preparation method of a SrTiO3 and LaAlO3 dual-nanometer particle doping YBCO composite thin film. The preparation method comprises the following steps of spin-coating a precursor solution on a substrate to obtain a precursor film attached onto a surface of the substrate; placing the precursor film in a quartz tube furnace introduced with dry oxygen, and rising a temperature to 150 DEG C with a rate of 10 DEG C per minute in a room temperature; rising the temperature to 400 DEG C with a rate of 1.5-3 DEG C per minute, performing heat preservation for 10 minutes, and changing the dry oxygen to humid oxygen when the temperature is higher than 150 DEG C, wherein the moisture content is 3.1%; rising the temperature to 770-840 DEG C with a rate of 5 DEG C per minute, and performing heat preservation for 2-3 hours, changing the atmosphere to a dry Ar / O2 atmosphere during the temperature rising process from 400 DEG C to 500 DEG C, and changing to humid Ar / O2 when the temperature is risen to 550 DEG C; changing the humid Ar / O2 to the dry Ar / O2 atmosphere in the last 30 minutes of heat preservation; and cooling a sample with the furnace after heat preservation is completed. By the method, the problems that the thin film is limited in pinning and the carrying capacity cannot be continuously improved under an externally-applied magnetic field are solved.

The invention belongs to the technical field of superconductor preparation, and specifically relates to a superconducting joint and a preparation method thereof. The superconducting joint comprises boron powder, magnesium powder, superconductors, an outer metal sheath and an inner metal sheath, wherein the superconductors and boron powder are coated by the inner metal sheath, a low-melting-point alloy phase is formed at the junction of the inner metal sheath and the magnesium powder when heat treatment is carried out, a liquid phase can be formed when the temperature is lower than 600 DEG C, and the diffusion rate and reaction rate of magnesium for entering the boron powder are accelerated, so that the reaction of the boron powder and the magnesium powder can be conducted at a temperaturelower than 600 DEG C, the crystal grain size of a product MgB2 is reduced, the crystal boundary area is increased, and thus the pinning ability of MgB2 is improved. In addition, the setting of the inner metal sheath can enable the connection efficiency of the superconducting joint not to be limited by the shape of the superconductors.