52results about How to "Improve machinability" patented technology

This invention relates to the field of carbon fiber composite materials technology, and discloses a carbon fiber bundle composite filament coated with nanofiber yarn, comprising carbon fiber bundles and nanofiber yarn, wherein the nanofiber yarn coats the outer surface of the carbon fiber bundles; the carbon fiber bundles are high-modulus carbon fiber bundles, and the nanofiber yarn is prepared from polymer materials by conjugated electrospinning. This invention utilizes conjugated electrospinning technology to introduce a dense and uniformly distributed layer of nanofiber yarn onto the surface of high-modulus carbon fiber bundles, obtaining a carbon fiber bundle composite filament coated with nanofiber yarn. This composite filament exhibits good wear resistance and toughness, and its processability is significantly improved.

The invention discloses a novel metal test piece end face polishing and grinding device which comprises a test piece chuck, a pressing device, a straight driven piece, a plane cam, a movable sliding block assembly body, a linear guide rail structure and a movable frame. The test piece chuck comprises a dovetail matching block, a test piece chuck block, a pressing screw and a chuck fixing screw. The pressing device comprises a cover plate, a compression spring, a lifting block, a threaded pin and a rolling bearing; the straight follower comprises a lifting block, an indexing block and a limiting screw. By means of the novel metal polishing and grinding device, the problem that after traditional manual polishing and grinding equipment conducts polishing and grinding, cambered surfaces and fillets appear on the polishing and grinding end face is solved, the yield of metallographic samples and the utilization rate of consumable items such as abrasive paper are increased, a linear one-way polishing and grinding mode is researched, developed and provided, and a novel semi-automatic mechanical polishing and grinding device is designed.

A high-strength hot-rolled steel sheet according to the present invention has a specific chemical composition and a steel microstructure including, as main phases, 80% to 100% of martensite and bainite in terms of total area fraction. An entire area fraction of the martensite in the bainite is 2% to 20%. Among the martensite in the bainite, an area fraction of martensite each having an orientation difference of 15° or more between a crystal orientation of the martensite and a crystal orientation of at least one of bainite adjacent to the martensite is more than 50% relative to the whole martensite. When regions surrounded by boundaries between adjacent crystals having an orientation difference of 15° or more are defined as crystal grains, an average aspect ratio of the crystal grains present in a region extending from a surface of the steel sheet to a depth of 5 um is 2.0 or less.

The application provides an image-side telecentric F-Theta scanning lens and application thereof, and relates to the technical field of optical imaging. The image-side telecentric F-Theta scanning lens comprises a diaphragm, a first positive lens, a second negative lens, a third positive lens, a fourth negative lens and a fifth positive lens which are coaxially arranged in sequence along the light path propagation direction. The fourth negative lens and the fifth positive lens are glued to form a glued double lens, and share one glued surface. The diaphragm is located at the front of the lens, is spaced apart from the first lens by 36.71 mm, and serves as an aperture diaphragm of the system to limit the incident light beam. The image-side telecentric F-Theta scanning lens provided by the application not only has a simple structure, but also is applied to scenes such as hyperspectral microscopic imaging, multi-waveband fluorescent microscopic imaging and wide-waveband industrial detection, and can realize low-distortion, image-side telecentric high-quality scanning imaging in a wide spectral range, so as to meet the strict requirements of the microscopic imaging system on large-field uniform illumination and accurate geometric measurement.

There is provided a lead-free free-cutting beryllium copper alloy that is superior in machinability. The lead-free free-cutting beryllium copper alloy consists of from 1.80% to 2.10% by weight of Be, from 0.10% to 3.00% by weight of Si, from 0.20% to 0.40% by weight of Co, from 0% to 0.10% by weight of Fe, from 0% to 0.10% by weight of Ni, and the balance being Cu and inevitable impurities, wherein the beryllium copper alloy includes a matrix phase being an α phase, a Si-rich phase being a κ phase rich in Si, and Co-Be-Si intermetallic compound grains containing Co, Be, and Si, and optionally Fe and / or Ni.

A method for preparing a multi-component polyimide resin includes the steps of first preparing polyimide acid (PAA) and then preparing the multi-component polyimide resin. The multi-component polyimide resin employs a unique molecular structure design, which endows the material with excellent heat resistance. It exhibits superior heat resistance, maintaining structural stability and performance unchanged at high temperatures, which is particularly important for temperature-sensitive fields such as aerospace and electronic packaging.

The application provides a composite metal sodium negative electrode material, a preparation method thereof and a sodium metal battery. The composite metal sodium negative electrode material comprises a porous organic film skeleton, an alloy type conductive sodium-philic layer and sodium metal filled in the pores inside the porous organic film skeleton. The application takes the porous organic film skeleton as a base material, constructs a three-dimensional flexible skeleton, and deposits the alloy type conductive sodium-philic layer on the porous organic film skeleton, so that the active sites for sodium ion deposition are increased and the rapid transmission of sodium ions is promoted.

This invention relates to a bag-film laminate comprising a base layer, a gas barrier layer, and a sealant layer sequentially laminated together, wherein the amount of lubricant present on the surface of the sealant layer is 5 mg / m³. 2 Up to 25 mg / m 2 The surface roughness (Ra) of the sealant layer is 0.1 μm to 0.5 μm. The amount of lubricant is obtained by cutting the bag-film assembly into 100 mm × 100 mm sections in the MD direction and TD direction, dropping 5 ml of chloroform onto the surface of the sealant layer of the bag-film assembly and letting it stand for 1 minute to prepare a lubricant extraction solution, and then using gas chromatography to measure the amount of lubricant contained in the lubricant extraction solution.

The application belongs to the technical field of lithium ion batteries, and particularly relates to a dry-process electrode preparation process for improving a PTFE fiberization network, which comprises the following steps: uniformly mixing an active material, a conductive agent and activated carbon through a mixer; adding a binder PTFE for secondary mixing; performing fiberization treatment on the above material; performing roller pressing on the fiberized powder to form a film, and compounding the film with a current collector to obtain a dry-process electrode. Through the preparation of the dry-process electrode, local stress concentration points can be formed in the mixing and fiberization processes, the shearing action on PTFE particles is improved, the PTFE particles are caused to deform and fiberize, the problem of low fiberization degree and poor mechanical performance in the process of preparing the dry-process electrode by the original fiber method is effectively improved, the ion resistance of the pole piece is lower, and the pole piece exhibits better electrochemical performance.

The present application relates to the field of organic electrochromic materials, and particularly relates to a transparent conductive material, a preparation method and application. The transparent conductive material simultaneously introduces two independent carbonyl groups in a molecular main chain, and realizes accurate coordination of energy level, polarity and charge transport performance through differential regulation of oxygen or nitrogen atoms. The polymer can be used as an ion storage layer, an electrode modification layer or an active functional layer in an electrochromic device, can realize fast reversible optical modulation at a low voltage (±1.0 V), has a high optical contrast (ΔT 550 > 65%), a short response time (<2 s) and excellent cycle stability (more than 3×10 4 times of cycles, a retention rate >95%), and has a wide application prospect in the fields of intelligent display, energy-saving buildings and flexible electronics.

Provided is an electronic device that achieves both stability of electrical contact between terminals and sealing performance. A power supply unit 101 includes a power supply adjustment board 10 and a holder 100 that holds the power supply adjustment board 10, an accommodation member 20 that accommodates the power supply unit 101 inserted from an opening 20a, and a cap member 23 that closes the opening 20a, wherein a positive electrode terminal 42 and a negative electrode terminal 43 are arranged side by side in the accommodation member 20, a positive electrode terminal 14 and a negative electrode terminal 15 are arranged side by side on one end side in the power supply unit 101, a locking mechanism P that locks the power supply unit 101 is provided in the accommodation member 20 such that the positive electrode terminal 14 and the negative electrode terminal 15 of the power supply unit 101 are brought into electrical contact with the positive electrode terminal 42 and the negative electrode terminal 43 of the accommodation member 20, and power supply lines 27 and 29 are disposed to penetrate the cap member in a sealed state and configured for connecting an external power supply to the power supply adjustment board 10.

This invention relates to a PCB back-drill cover plate and its preparation method. The preparation method includes: (1) impregnating resin onto a backing paper A and baking it to obtain a resin semi-cured sheet; placing aluminum foil on a backing paper B and laminating it to obtain an aluminum foil backing paper; (2) stacking one side of the backing paper B with the resin semi-cured sheet and then hot-pressing it to obtain the PCB back-drill cover plate. This invention uses aluminum foil backing paper to replace traditional pure aluminum foil, which can reduce the thickness of the aluminum foil and enhance the processability by relying on the backing paper, solving the problems of easy wrinkling, stretching, and breakage in aluminum foil processing; at the same time, the preferred use of ultra-thin aluminum foil can also improve the back-drilling depth control accuracy, residual pile consistency, and hole concentricity, reduce the risk of overcutting and simplify the drilling process. By pre-laminating the aluminum foil backing paper and optimizing the paper weight and glue application amount, the support of the cover plate and the flatness of the board surface can be improved, and the separate glue application step on site can be eliminated, making the process simpler and the performance more stable.

The application provides a 800MPa-grade torsion beam steel and a preparation method, and belongs to the field of steel preparation.The chemical components of the torsion beam steel include:C:0.06%-0.09%, Si>0 and ≤0.6%, Mn:1.5%-2.1%, P≤0.015%, S≤0.003%, Nb:0.01%-0.05%, Ti:0.03%-0.07%, Cr:0.3%-0.7%, Al:0.3%-0.7%, N>0 and ≤0.005%;the internal microstructure of the torsion beam steel includes:≥85% of bainite, 5%-10% of residual austenite, and the rest of ferrite or martensite.Through reasonable design of the chemical components of the steel, the bainite structure containing residual austenite is obtained, the high strength and high forming performance of the raw material are realized, and the high strength and excellent processability of the torsion beam steel are simultaneously considered.

An oil ring wire 2 contains an alloy steel as a material. The alloy steel contains: 0.50 to 0.65% by mass C; 1.60 to 2.30% by mass Si; 0.60 to 1.10% by mass Mn; 0.75 to 1.15% by mass Cr; 0.18 to 0.45% by mass Ni; 0.05 to 0.15% by mass V; 0.15% by mass or less Cu; and inevitable impurities. In the oil ring wire 2, an area percentage of a carbide is more than 6.0% and 10.0% or less.

This invention discloses a deuterated scintillator with a space charge transfer structure, its preparation method, and its application in X-ray scintillation imaging, belonging to the field of scintillator materials. The scintillator structure of this invention is characterized by using tripterene as a bridging unit to connect a planar nitrogen-oxygen donor and a deuterated boron-oxygen acceptor. While ensuring high X-ray absorption capacity, it reduces the non-radiative transition rate, achieving a synergistic effect of high luminescence quantum yield, fast decay lifetime, and low self-absorption, thus meeting the requirements of high-resolution, high-sensitivity X-ray imaging. A transparent and highly flexible organic gel scintillator film is prepared by blending and polymerizing an X-ray-responsive organic scintillator with hydroxyethyl methacrylate. This film exhibits highly efficient luminescence under both photoluminescence and radiative luminescence conditions, significantly improving X-ray imaging sensitivity and resolution. Experiments show that the organic gel scintillator film prepared by this invention achieves a resolution of over 16.0 lp / mm under standard line-pair cards.

This invention discloses a low-carbon tin-containing free-machining steel and its production method. The weight percentage (wt%) of the chemical composition in the steel is: C 0.06-0.15, Si 0.10-0.30, Mn 1.50-1.80, S 0.40-0.60, P 0.06-0.10, Sn 0.30-0.50, Mn / S≥4.0, Sn / S≥0.80, O: 130-200ppm, with the remainder being iron and unavoidable impurities. This invention, through compositional design, controls Mn / S≥4.0 to improve the spindle morphology of sulfides, and Sn / S≥0.80 to achieve Sn aggregation near sulfides and grain boundaries, as well as aggregation and precipitation in other areas of the material matrix, which is more conducive to improving the material's machinability and reducing turning cracks. The Sn element is added using a combined addition technology of the tundish impact zone and the crystallizer nozzle, which improves the Sn yield.

This invention discloses a PVC cable sheath material, comprising the following components by weight: 100 parts PVC resin; 26-40 parts cold-resistant rubber; 45-53 parts cold-resistant plasticizer; 45-52 parts filler; 10-26 parts flame retardant; 9-15 parts heat stabilizer; 0.5-1.2 parts antioxidant; 2.0-3.5 parts lubricant; and 0-1.2 parts colorant. This invention also discloses a method for preparing the PVC cable sheath material and a cold-resistant and flame-retardant cable. The PVC cable sheath material of this invention has excellent cold resistance and flame retardancy, and can meet the requirements for cable sheath use in extremely cold environments of ~40℃ and below.

Provided is a silicone resin composition which exhibits excellent workability and which maintains fluidity even if filled, to a high degree, with a thermally conductive filler. This silicone resin composition contains: a component (A), an organopolysiloxane which is represented by a formula (1) and has a molecular weight distribution (Mw / Mn) of 1.20 or less; and a component (B), a thermally conductive filler. In the formula (1), R1 are each independently a monovalent saturated hydrocarbon group or a monovalent aromatic hydrocarbon group, R2 is a monovalent saturated hydrocarbon group, X is oxygen or a divalent hydrocarbon group, n is an integer of 1 or more, and a is an integer between 1 and 3.

The invention relates to a melt spinning device for extruding synthetic filaments, in particular polyamide filaments, which release monomer and / or oligomer compounds during extrusion, comprising a spinning block (2) for extruding filaments (F), the spinning block having a spinneret (20) through which the synthetic filaments are extruded at a predetermined first temperature (T1) into an extrusion chamber (5) located between the spinneret and a cooling device for cooling the filaments, the cooling device (6) delimiting a cooling chamber (8) in which the filaments are cooled to a predetermined second temperature (T2), the extrusion chamber being extended from the cooling chamber by a decoupling extension (4) such that in an evaporation section (50) the first temperature (T1) is maintained at an evaporation temperature (TEVP) at which no exhaust gases (70), in particular monomer and / or oligomer compounds, are present in the decoupling extension (4) by condensation (K) resulting in a deposit.

The application discloses a copper-molybdenum-copper composite material and a flexible deep processing method thereof, and comprises the following steps: adding pure molybdenum metal powder into a solvent and a dispersing agent, and after once ball milling, adding a thickening agent and a binder, and after twice ball milling and defoaming, molybdenum slurry for casting forming is obtained; the molybdenum slurry for casting forming is placed on a base strip, and after drying, a molybdenum film is obtained by adjusting a scraper height gap and a base strip speed; a certain thickness of copper slurry for printing is screen printed on upper and lower surfaces of the molybdenum film, and after drying and hot isostatic pressing, a copper-molybdenum-copper composite material flexible film is obtained; the copper-molybdenum-copper composite material flexible film is placed in a stamping die cavity to be bent, and after low-temperature curing, shaping and demolding, and after degumming and integrated co-firing, the copper-molybdenum-copper composite material with bending size requirements is obtained. The application has the advantages of simple process, precise component control, good precision, high finished product rate and the like.

The present disclosure relates to a current collecting component (100), a battery and a battery module, includes a current collecting part, the current collecting part includes a current collecting region and at least one electrical connection region (111); and a connecting part, the connection part is connected with the current collecting region; wherein a thickness of the current collecting region is greater than a thickness of the electrical connection region (111).

The application discloses a method for applying photo-thermal orthogonal regulation color-changing fluorescent polymer hydrogel to temperature monitoring and anti-counterfeiting, using phase change materials, thermochromic molecules and photochromic molecules as raw materials, a series of photo-thermal orthogonal regulation color-changing fluorescent polymer capsules are prepared by adopting an emulsion-solvent evaporation method, then the prepared capsules are dispersed in hydrogel to prepare photo-thermal orthogonal regulation color-changing fluorescent polymer hydrogel, and the prepared hydrogel is used for temperature monitoring and anti-counterfeiting under photo-thermal orthogonal regulation after arrangement and combination. The prepared color-changing fluorescent polymer hydrogel has fast photoresponsivity and thermal responsivity, excellent light switching performance and high fluorescent contrast, a relatively narrow temperature response interval, temperature response sensitivity, and a simple preparation process, and has great application potential in the fields of data encryption, anti-counterfeiting and temperature monitoring.

A thermally conductive composition of the present invention is a composition in a liquid form at 25°C comprising an organopolysiloxane, a thermally conductive filler, and an ester compound having 12 to 28 carbon atoms. According to the present invention, it is possible to provide a thermally conductive composition, which has good workability because of its low viscosity, excellent heat resistance, and in which a low-molecular weight siloxane does not tend to be generated.

The application provides an aluminum alloy plate and a preparation method thereof. The preparation method comprises the following steps: S1, first heating a first ingot to 280-320 DEG C and then first holding for 0-8 hours to obtain a second ingot; S2, second heating the second ingot to 380-420 DEG C and then second holding for 0-6 hours to obtain a third ingot; S3, third heating the third ingot to 435-465 DEG C and then third holding for 4-16 hours to obtain a fourth ingot; S4, sequentially performing fourth holding and hot rolling on the fourth ingot to obtain the aluminum alloy plate; the temperature of the fourth holding is 430-460 DEG C; when cold rolling is performed after the hot rolling, intermediate annealing is performed in the process of the cold rolling. The preparation method shortens the production cycle, and makes the dispersed phase stably precipitate, improves the processability of rolling and the uniformity of the final plate structure.

The invention relates to a method for producing an injection molded part (50), wherein in particular the following steps are carried out in the following order: a) providing an insert film or insert sheet, wherein the insert film or insert sheet (10) comprises a haptics layer (11); b) applying a cushioning protection film comprising an adhesive layer (21) and a cushioning layer (22) onto the haptics layer (11) of the insert film or insert sheet (10); c) inserting the insert film or insert sheet (10) into an injection mold (60) of an injection molding machine such that the cushioning protection foil (20) is in contact with the walls of the injection mold (60); d) back injection molding the insert film or insert sheet (10) with a plastic compound to provide the injection molded part (50); e) removing the injection molded part (50) from the injection mold (60).

The application discloses a full-organic polymer dielectric film with a five-layer structure and a preparation method thereof. The dielectric film comprises five-layer films; the five-layer films comprise two low-loss high-breakdown layer films located at the outermost layers, two intermediate transition layer films arranged between the two low-loss high-breakdown layer films, and a high-dielectric layer film arranged between the two intermediate transition layer films; and the full-organic polymer dielectric film is prepared by bonding the five-layer films in a continuous hot-pressing process. The organic polymers with different properties are combined together by the method of multi-layer continuous hot-pressing, so that the advantages of each component can be fully exerted, the growth of the electric tree branches is inhibited by the differences between the layers of different components, and the breakdown strength is improved. The full-organic composite film has the advantages of high dielectric constant, high breakdown field strength and high discharge energy density.

This invention belongs to the field of LD steel preparation technology, and specifically relates to a method for preparing rare earth cerium-modified LD steel and its application. The method includes the following steps: S1, batching and smelting; S2, multi-directional forging; S3, spheroidizing annealing; S4, quenching treatment; S5, deep cryogenic treatment and tempering. This invention adds rare earth cerium in a specific form, utilizing its strong deoxidizing and desulfurizing capabilities to effectively reduce the content of gases and harmful impurities in the molten steel. Simultaneously, cerium can form a stable composite phase with inclusions in the steel, modifying the originally angular harmful inclusions into spherical or near-spherical shapes, significantly reducing the cutting effect of inclusions on the matrix, reducing stress concentration sources, refining grains, suppressing network carbides, and promoting dispersed carbide distribution. Ultimately, a well-matched LD steel with high hardness, high tensile strength, and high impact toughness is obtained, improving wear resistance and extending tool life.

This invention discloses a mild aqueous-phase synthesis method for ionic covalent organic framework nanosheets. Tp and Py are added to anhydrous ethanol at a molar ratio of 1:3. After reaction under stirring, a pale yellow solid is obtained by filtration, washing, and drying. This solid is used as an aldehyde monomer and reacts with an amino monomer containing ionic groups in a pure aqueous system under mild conditions catalyzed by Brønsted acid, thereby achieving the direct synthesis of ionic covalent organic framework nanosheets. By introducing Brønsted acid into the reaction system to regulate the hydrolysis rate of the aldehyde monomer and the formation rate of the covalent organic framework, the reaction can be completed in a pure aqueous system at room temperature and pressure, significantly simplifying the synthesis process and eliminating the need for toxic organic solvents, thus exhibiting good green sustainability. The obtained nanosheets have excellent processability and can be applied to the preparation of membrane materials such as nanofiltration membranes and tubular composite membranes.

The application relates to the field of high polymer materials, and discloses a polyimide as well as a preparation method and application thereof. The preparation method comprises the following steps: reacting diamine and dianhydride in the presence of an ether solvent to obtain a polyimide solution, and obtaining the polyimide through precipitation; wherein the ether solvent is an aromatic ether containing 1-3 ether bonds; and the reaction conditions comprise the following: the reaction temperature is 120-220 DEG C; and the reaction time is 3-12 h. The ether solvent used in the method has good solubility to dianhydride, diamine and a prepolymer generated in the reaction, so that the reaction is more efficient; and the polyimide prepared by the method has high molecular weight, processability and good mechanical properties.

The invention discloses a heat treatment method for reducing quenching and tempering state surface hardness of 15CrMoR, and belongs to the technical field of metallurgy. The heat treatment method comprises quenching and tempering heat treatment. In the quenching process, the heating temperature ranges from 830 DEG C to 840 DEG C, the total heating time ranges from 2.0 min / mm to 2.5 min / mm, and water cooling is conducted to the room temperature after discharging; and in the tempering process, the heating temperature is 720-730 DEG C, the heat preservation coefficient is 3-3.5 min / mm, and air cooling is conducted after discharging. The structure of the tempered steel plate is a two-phase structure of ferrite and tempered martensite. The produced steel plate has good obdurability matching, the surface hardness is smaller than or equal to 220 HB, and the crack defect in the machining process of rolling, welding and the like is avoided.