25results about How to "Raise room temperature" patented technology

The invention provides an auxiliary cooling device for friction welding of a ring pipe structure and a working method of the auxiliary cooling device, and belongs to the technical field of friction welding. The problems that in the prior art, due to the fact that the surface of an inner ring of a large-diameter-thickness-ratio ring material dissipates heat slowly, the cooling speed of a welding area is uneven, residual stress is increased, the strength of a welding joint is affected, and due to the fact that the surface of the inner ring dissipates heat slowly, microstructure changes are uneven, and the mechanical property of the material is affected are solved. The device comprises a tailstock side clamp, a main shaft side clamp, an inert gas connecting pipe, a gas nozzle and a cooling medium spraying mechanism, the tailstock side clamp is installed in a movable sliding table box body of friction welding equipment, a tailstock side part to be welded is clamped in the tailstock side clamp, a main shaft side part to be welded is clamped in the main shaft side clamp, and the inert gas connecting pipe is connected with the gas nozzle. An inert gas connecting pipe is arranged in the main shaft side to-be-welded part, the outlet end of the inert gas connecting pipe is connected with the gas nozzle, and a cooling medium spraying mechanism is arranged on the inner side of the tailstock side to-be-welded part. The device is mainly used for cooling the welding seam of friction welding.

The invention relates to the technical field of alloy preparation, particularly provides a 650 DEG C high temperature resistant titanium-based composite material plate, and further provides a preparation method of the plate. The titanium-based composite material plate resistant to the high temperature of 650 DEG C, provided by the invention, is prepared from the following chemical components in percentage by mass: 6.0 percent to 7.0 percent of Al, 1.0 percent to 3.0 percent of Zr, 0.5 percent to 2.0 percent of Mo, 0.4 percent to 1.0 percent of Nb, 0.4 percent to 1.0 percent of W, 0.1 percent to 0.4 percent of Si, 0.4 percent to 0.7 percent of B, 0.01 percent to 0.10 percent of C and the balance of Ti and inevitable impurities. According to the titanium-based composite material component system provided by the invention, a vanadium element which is easy to generate interface reaction at high temperature is abandoned, and refractory metal elements such as niobium and tungsten are adopted to cooperate with a ceramic reinforced phase formed by boron, carbon and the like, so that the high-temperature performance and the thermal stability of the material are improved; meanwhile, by controlling the content of molybdenum, aluminum and other elements within a specific interval, the hot working performance of the material is remarkably improved while high strength is maintained, and the contradiction between insufficient high-temperature performance and poor hot working performance of a traditional titanium-based composite material is effectively solved.

The utility model discloses a warm-keeping type energy-saving heating device which comprises an installation shell and a heat-preservation type energy-saving heating mechanism, a connecting frame is arranged at the upper end of the right side of the installation shell, the heat-preservation type energy-saving heating mechanism comprises transverse pipes, vertical pipes, copper fin sleeves, outer gear rings and rack plates, the transverse pipes are arranged at the upper end and the lower end in the installation shell respectively, and the vertical pipes are arranged at the upper end and the lower end in the installation shell respectively. According to the warm-keeping type energy-saving heating device, water flows into the warm-keeping type energy-saving heating device from the upper portion, the flowing speed of hot water is slowed down through a flow blocking plate, the temperature difference in the pipes is reduced, the temperature difference between the pipes is reduced, and the heating efficiency is improved. The deflectable copper fins are arranged, heat radiation can be carried out in multiple directions through heat conduction of the copper fins, the room temperature can be rapidly and evenly increased, the heat preservation device is further arranged, heat can be reflected while heat is prevented from being absorbed by a wall, and excessive waste of the heat is avoided.

This invention provides a high-strength, high-toughness, and high-thermal-stability nanoparticle-reinforced AZ91 magnesium alloy and its preparation method. The preparation method includes the following steps: mixing niobium-titanium-aluminum alloy powder, BN powder, and C powder, then sealing the mixture in an aluminum tube to obtain an aluminum-powder composite tube blank containing powder particles; then subjecting the composite tube blank to cold drawing and alternating heat treatment, melting, mixing with molten pure aluminum, and twin-roll casting to obtain an intermediate alloy wire containing nano-ceramic particles; mixing the preheated intermediate alloy wire with molten magnesium alloy, followed by mechanical stirring, ultrasonic dispersion, refining and degassing, and cleaning. A high-strength, high-toughness, and high-thermal-stability nanoparticle-reinforced AZ91 magnesium alloy is obtained by slag removal, casting, homogenization treatment, air cooling, extrusion molding, and annealing. The magnesium alloy has a room temperature yield strength of 178.7-290.2 MPa, a tensile strength of 238.9-389.1 MPa, and a fracture strain of 12.4-14.6%. After serving at 150-180℃ for 30-100 hours, the yield strength is 120.3-151.8 MPa, the tensile strength is 158.1-203.6 MPa, and the fracture strain is 38.7-61.9%.

The embodiment of the invention discloses a nickel-based superalloy for brush sealing and a preparation method and application thereof. The nickel-based high-temperature alloy is prepared from the following components in percentage by weight: 0.03 to 0.10 percent of C, 0.01 to 0.08 percent of Mn, 19.00 to 21.00 percent of Cr, 3.20 to 3.70 percent of Al, 2.00 to 4.00 percent of Fe, 1.00 to 3.60 percent of Mo, 0.01 to 0.50 percent of Co, 0.001 to 0.05 percent of La and the balance of nickel and inevitable impurities. When the alloy is stretched at the room temperature, the tensile strength reaches 1200 MPa or above, the yield strength is within the required range, the average oxidation rate is reduced to 0.0006 g / m < 2 >. H or below, and the alloy has good oxidation resistance, does not crack during forging machining, has good hot working performance and meets the design and use requirements of advanced aero-engines and gas turbines.

The utility model relates to the technical field of building material detection and test equipment, and discloses a concrete curing chamber which comprises a curing chamber body, a magnetic suction door and a magnetic suction frame. According to the concrete curing room, external heat exchange is effectively isolated by arranging the heat preservation layer, energy loss is reduced, the energy-saving effect is achieved, the room temperature can be rapidly increased within a short time through the multiple sets of graphene far-infrared heating pieces, when the temperature reaches the preset upper limit, a system can automatically start a cooling mechanism and switch to a refrigeration mode, and the energy-saving effect is achieved. By means of the application of the low-temperature mute scroll compressor, the micro-channel condenser and the evaporator, energy consumption is reduced, heat dissipation efficiency is improved, in addition, a humidification and dehumidification system is further integrated in the cultivation chamber, moisture in air is increased through an ultrasonic atomizer, meanwhile, redundant moisture is removed through a solid drying agent adsorption unit, constant indoor relative humidity is ensured, and the energy consumption is reduced. And due to the application of the low-noise direct-current fan and the HEPA filter screen, uniform distribution of airflow and purification of air quality are achieved.

The invention discloses Ti-based alloy powder, which is prepared from the nominal components in percentage by atom: (5 to 10) of Ti, (2 to 5) of Al, (1 to 3) of V, (0.5 to 2.0) of Y2O3 and the balance of Ti and inevitable impurities, the preparation method comprises the following steps: 1, weighing raw material powder; 2, charging and sealing; 3, ball milling; and 4, discharging to obtain Ti-based alloy powder. According to the Ti-based alloy powder disclosed by the invention, high-volume nano Y2O3 is introduced and uniformly dispersed in a Ti matrix to form a dispersion strengthening phase, so that the room-temperature and high-temperature strength, creep resistance and thermal stability of the alloy are improved; according to the mechanical alloying process, the ball-to-material ratio, the rotating speed and the time of ball milling are strictly controlled, intermittent ball milling and external cooling are adopted to control temperature rise and pollution, it is guaranteed that Y2O3 forms nanocrystalline and a dispersion strengthening phase in a Ti matrix, the strength, hardness and thermal stability of the alloy are improved, the process is controllable, and repeatability is good.

The invention belongs to the technical field of lithium batteries, and particularly discloses an organic electrolyte and a preparation method and application thereof, the organic electrolyte comprises an inorganic oxide additive, a lithium salt and an organic solvent, the mass percentage content of the inorganic oxide additive is 0.01-3.0 wt%, and the concentration of the lithium salt is 0.1-6 mol / L. The specific inorganic oxide is selected as the film-forming additive of the lithium battery, so that stable interface films can be formed on the surfaces of the positive electrode and the negative electrode at the same time, the interface impedance of the battery is reduced, side reactions in the battery and dissolution of transition metal ions are inhibited, the cycling stability of the lithium battery in a high-voltage and wide-temperature range is effectively improved, and the service life of the lithium battery is prolonged. Meanwhile, good economic benefits are also shown.

This invention provides a battery comprising an electrolyte and a negative electrode, wherein the negative electrode active material comprises a silicon-containing material; the electrolyte comprises a first additive and a second additive, the first additive comprising fluoroethylene carbonate, and the second additive comprising a compound having a structure of Formula 1, wherein R1-R3 are each independently selected from substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, or substituted or unsubstituted C2-C10 alkynyl groups, and at least one unsaturated group is included in R1-R3. The battery provided by this invention uses silicon material as the negative electrode and exhibits excellent room temperature and high temperature cycling performance, as well as high temperature storage performance.

This invention discloses a highly efficient degassing refining agent for magnesium alloy ingots and its preparation method in the field of molten metal purification. The refining agent is composed of lanthanum fluoride-supported titanium carbide nanocomposite, calcium zirconate and graphene oxide nanohybrid, and various components such as anhydrous magnesium chloride, anhydrous sodium fluoride, anhydrous potassium chloride, metallic calcium powder, barium carbonate, and alumina micro powder in a specific ratio. Its preparation mainly includes: first, dispersing titanium carbide nanoparticles and reacting them with a lanthanum fluoride-containing solution, followed by hydrothermal treatment and calcination to obtain the lanthanum fluoride-supported titanium carbide nanocomposite; second, mixing a zirconium calcium salt solution with a graphene oxide dispersion, followed by urea co-precipitation, hydrothermal reaction, and calcination under a protective atmosphere to obtain the calcium zirconate and graphene oxide nanohybrid. This invention, through the synergistic effect of two inorganic modifying compounds, can deeply remove hydrogen and inclusions from magnesium melt, thereby significantly improving the metallurgical quality and overall performance of magnesium alloy ingots.

The application discloses a cyano-modified compound with a diphenylbenzoquinone as a bridging structure and an organic electroluminescent device containing the same, and belongs to the technical field of semiconductor materials. The structure of the compound is shown in general formula (1). The compound has good stability and electron resistance, and has good electron injection and electron transport capacity. When the compound is used as an electron transport material of an organic electroluminescent device, the driving voltage of the device is significantly reduced, and the normal temperature life and high temperature life of the device are significantly improved.

The invention provides a heat-resistant high-strength cast Al-Si-Cu-Ni aluminum alloy and a preparation method thereof. The alloy comprises the following elements in percentage by mass: 6.5%-7.5% of Si, 0.45%-0.6% of Mg, 0.3%-0.6% of Cu, 0.5%-5.5% of Ni, 0.1%-0.2% of Ti and the balance of Al and other inevitable impurities. According to the method, the room-temperature tensile strength and the high-temperature tensile strength of the alloy are improved by adjusting the content of Si, Mg, Cu, Ni and Ti in the aluminum alloy and carrying out different heat treatment, the room-temperature tensile strength of the aluminum alloy obtained through two-stage solid solution and single-stage aging treatment reaches 280-315 MPa, and the high-temperature instantaneous tensile strength at the temperature of 270 DEG C is kept to be 210 MPa or above; after two-stage solid solution and two-stage aging treatment, the room-temperature tensile strength reaches 315-340 MPa, the high-temperature instantaneous tensile strength at 150-250 DEG C still keeps 85%-90% of the room-temperature tensile strength, but the tensile strength is kept above 120 MPa after the temperature is higher than 300 DEG C, and therefore the prepared aluminum alloy can be applied to production of large complex castings such as engine boxes and cylinder covers.

The present application relates to a kind of preparation methods of net basket organization TC11 titanium alloy blade, comprising the following steps: S1: TC11 titanium alloy ingot is heated to 1100~1150 ℃, after 8h~16h heat preservation, furnace forging, and forging ratio is not less than 4;S2: blank in S1 is 20 ℃~50 ℃ above T beta phase transition point is carried out 2~5 fire times of upsetting and drawing deformation, and total forging ratio is not less than 10;S3: the forging blank in S2 is heated to 10 ℃~30 ℃ above T beta phase transition point, is formed by 2~4 fire times on precision forging machine, S4: the rod prepared by S3 is heated to 10 ℃~30 ℃ above T beta phase transition point, is formed by 1~2 fire times using hammer forging on hammer forging machine;S5: the blade of hammer forging formation of S4 is heat treated and surface processing, obtains net basket organization TC11 titanium alloy blade.The blade surface of the present application is formed gradient type permeation oxygen layer after processing, so that the fatigue property of blade is greatly improved.

The application provides a synergistic composite toughening PP-R pipe material and a preparation method and application thereof, and belongs to the technical field of PP pipes. The synergistic composite toughening modified PP-R pipe material provided by the application can improve the toughness of the material at room temperature and low temperature by adding an elastomer toughening agent. The addition of PP-B and PE can limit the excessive reduction of tensile strength and yield strength caused by the addition of the elastomer, so as to maintain the balance between toughness and rigidity. The addition of a compatibilizer can improve the interface bonding problem of the blend, especially the dispersion effect of the elastomer toughening agent and PE, and reduce the phase separation between PP and the elastomer and PE. The application forms a PP-R / elastomer / PE / PP-B multi-component synergistic composite toughening system through various components, realizes the complementation and synergistic improvement of the performance of the materials, and thus improves the performance of the PP-R pipe.

The invention provides a smelting and forging heat treatment process method of 15Cr2NiMoV steel for a natural gas compressor shell. A steel ingot is smelted and poured by adopting a process route of EBT electric arc furnace-LF furnace refining-VD vacuum refining-die casting. According to the 15Cr2NiMoV steel forge piece for the natural gas compressor shell, the heating temperatures of forge pieces of different specifications are controlled, a steel ingot is heated to a certain temperature to be forged, heat treatment is conducted after the forge piece is forged and formed, and good tissue and comprehensive mechanical properties are obtained. The 15Cr2NiMoV steel forge piece product for the natural gas compressor shell is manufactured by optimizing the component proportion and reasonably selecting smelting, forging and heat treatment processes, and the obtained material has high normal-temperature and high-temperature tensile strength and hardness, good low-temperature impact toughness and temper brittleness resistance and high creep strength and high-temperature endurance strength; according to the method, the product quality is improved, the rejection rate is reduced, and compared with the prior art, the method has great practical application value.

The invention discloses a calcium carbonate coal powder high pressure forming carbonized pellet and calcium carbide and a preparation method thereof, belonging to the technical field of calcium coal pelletization, and solves the problems of low raw material utilization rate in the existing calcium carbide preparation process and low pellet strength obtained by the existing pellet preparation method. Its preparation method comprises the following steps: grinding calcium carbonate and raw coal, then adding a binder for compression molding, and finally pyrolysis carbonization to obtain. The present invention eliminates the process links of pyrolysis of blue charcoal furnace to generate semi-coke and lime kiln calcining limestone in the traditional calcium carbide production process, combines the two into one, saves construction investment, reduces carbon dioxide emissions, reduces pollution, and reduces energy consumption by 10%-15%; expands the scope of use of raw materials, improves the utilization rate of raw materials, and reduces raw material costs by 10%-20%; effectively improves the room temperature and high temperature compressive strength of the obtained carbonized pellets to meet the needs of subsequent calcium carbide furnaces for calcium carbide processing.

The invention discloses a high-service-life magnesium-aluminum-carbon sliding plate for special steel pouring and a preparation process of the high-service-life magnesium-aluminum-carbon sliding plate, and belongs to the technical field of refractory materials. Comprising the following raw materials in parts by weight: 85-90 parts of fused magnesite, 1.5-3 parts of a carbon material, 0.2-1 part of biochar, 3-6 parts of spinel, 0.5-1 part of nano alumina powder, 1-2 parts of metal silicon powder, 1-2 parts of metal aluminum powder, 0.5-2 parts of aluminum-magnesium alloy, 0.5-2 parts of aluminum-silicon alloy, 1-1.5 parts of metal zinc, 1 part of boron carbide, 1.8-2.2 parts of a binding agent, 1.8-2.2 parts of organic silicon resin and 0.2 part of hexamine. The magnesium-aluminum-carbon sliding plate is long in service life and stable in performance, and the consumption of the refractory material is reduced.

The invention relates to the technical field of welding, in particular to a heat treatment method suitable for Ti2AlNb alloy electron beam welding. A heat treatment method suitable for Ti2AlNb alloy electron beam welding comprises the following steps that (a) solid solution heat treatment is conducted on a Ti2AlNb alloy forge piece, PAG cooling liquid is adopted for cooling, then heat preservation stress relief annealing treatment is conducted, and a pretreated forge piece is obtained; (b) the pretreated forge piece is subjected to electron beam welding, gas quenching is adopted after electron beam welding, and a welding piece is obtained; and (c) carrying out aging treatment on the welding piece, and carrying out gas quenching after the aging treatment to obtain the Ti2AlNb alloy welding piece. According to the heat treatment method suitable for Ti2AlNb alloy electron beam welding, through cooperation of all the steps, a double-batten structure with excellent comprehensive performance is obtained, and the room-temperature and high-temperature tensile performance of a Ti2AlNb alloy weldment can be improved.

The application relates to the technical field of polypropylene materials, in particular to a modified polypropylene composite material and a preparation method thereof. According to weight parts, the raw materials comprise the following components: 62-78 parts of polypropylene resin, 6-11 parts of reinforcing particles, 2.8-5.5 parts of ethylene-octene copolymer, 2-4 parts of an interface bridging agent, 3-8 parts of a stabilizer and 0.5-1 part of a composite additive; the raw materials of the reinforcing particles comprise alkali-treated bamboo fibers, halloysite nanotubes and a titanate coupling agent. After being treated, the alkali-treated bamboo fibers expose active hydroxyl groups on the surface, the active hydroxyl groups are bridged with aluminum hydroxyl groups and silicon hydroxyl groups on the outer wall of the halloysite nanotubes through hydrogen bonds and the titanate coupling agent, the ethylene-octene copolymer dispersion phase is embedded in a polypropylene matrix, octene branched chains of the ethylene-octene copolymer can form physical entanglement with polypropylene molecular chains, buffer is provided in a low-temperature environment, and the normal-temperature and low-temperature impact resistance of the composite material is improved.

The invention provides a machining process of an I909 special-shaped ring forge piece. The machining process comprises the following steps that S1, a bar is cut; s2, punching and flattening; s3, multi-heating-number ring rolling is carried out; s4, one-heating-number ring rolling shaping is carried out; s5, heat treatment; and S6, performance testing. By reducing the rolling temperature of the last heating number, the problem that the mechanical property of the forging process of the I909 alloy annular forge piece is unqualified is solved, the room-temperature and high-temperature tensile properties are greatly improved, and data are stable.

The application provides a lithium iron phosphate positive electrode active material, a preparation method of the lithium iron phosphate positive electrode active material, a positive electrode sheet, a battery, a battery pack and an electric device. 16 spins / g~2.0000×10 16 spins / g. The lithium iron phosphate positive electrode active material provided by the application has a high compaction density and has normal temperature rate discharge and low temperature discharge performance.

This invention discloses a surface treatment method for titanium alloys. The specific steps are as follows: placing the titanium alloy structural component or thin-walled component in an oxygen atmosphere at 0.5 to 3 times the standard atmospheric pressure, or a mixed atmosphere with an equivalent oxygen concentration, and holding it at 400℃ to 420℃ for 50 to 200 hours, results in an oxide layer with a thickness less than 3 μm and greater than 1 μm on the surface of the titanium alloy sample, and a gradient oxygen-permeable structure forming on the subsurface. The surface treatment process of this invention is simple to operate, highly adaptable, and effective, and can be applied to various complex titanium alloy structural components or thin-walled components.

All season self-regulating air closed loop enclosure wall, cover high quantitative configuration method and air flow regulation method. At present, there is a lack of related processing measures which can utilize external temperature to regulate indoor temperature and air flow direction in real time. The all season self-regulating air closed loop enclosure wall in the application comprises an outer light condensing cover body and a main wall body, the outer light condensing cover body is arranged outside the main wall body, a front receiving cavity is formed between the inner wall of the outer light condensing cover body and the outer wall of the main wall body, a light absorbing layer and a reflective coating are vertically arranged on the outer wall of the main wall body from top to bottom, the light absorbing layer and the reflective coating are both arranged towards the outer light condensing cover body, at least one upper air flow communication hole is processed on the top of the main wall body and communicates with the front receiving cavity, and at least one lower air flow communication hole is processed on the bottom of the main wall body and communicates with the front receiving cavity.

The invention provides an Al-Cu alloy capable of simultaneously improving room temperature performance and high temperature performance and a preparation method of the Al-Cu alloy, and belongs to the technical field of aluminum-copper alloys. According to the method, Z (Z is Sc or / and Zr) elements are introduced to form Al3Z heterogeneous core refined grains, Q (Q is Sn, Cd or In) elements are used for promoting formation of Cu-Q-vacancy clusters, and the size, distribution uniformity and precipitation number density of a theta '-Al2Cu phase are regulated and controlled. The synergistic effect of the two remarkably improves the room temperature and high-temperature performance of the alloy at the initial stage of thermal exposure. The element Q promotes formation of X (X is Cr, Mn or Cr and Mn)-Cu-vacancy clusters in the aging process, and enrichment of the element X in a theta '-Al2Cu phase is improved; and the X element is segregated on an interface and participates in a solute partition effect, so that the thermal stability is further enhanced. And in the later stage of thermal exposure, X and Z are diffused to coherent and semi-coherent interfaces of the theta '-Al2Cu phase respectively, the coarsening driving force is reduced, solute dragging is generated, the size increase of the precipitated phase is inhibited, and therefore the sequential thermal stabilization effect is formed.

The invention belongs to the technical field of metal materials, and mainly relates to a calcium hexaboride reinforced hypereutectic aluminum-silicon alloy and a preparation method thereof.The alloy is composed of, by mass, 14.00-18.00% of Si, 3.00-6.00% of B, 2.00-10.00% of Ca and the balance Al. According to the preparation method, an Al-5B intermediate alloy serves as the source of the boron element, an Si-30Ca intermediate alloy serves as the source of the calcium element, and the aluminum-silicon alloy reinforced by calcium hexaboride serves as the source of the calcium element; pure silicon and an Si-30Ca intermediate alloy are used as sources of a silicon element. The preparation method comprises the following steps: heating to 950 DEG C, melting the Al-5B intermediate alloy, adding the Si-30Ca intermediate alloy, melting, finally adding the pure silicon, mixing, melting, uniformly stirring, casting, and carrying out T6 heat treatment. The calcium hexaboride reinforced hypereutectic aluminum-silicon alloy prepared by the invention is a high-strength heat-resistant high-silicon aluminum alloy, is high in strength and hardness and good in wear resistance, and has good mechanical properties at room temperature and high temperature. The preparation method provided by the invention is low in cost and simple in process, meets the requirements of automobile safety parts on high-temperature mechanical properties, and is suitable for large-scale popularization and application in parts such as automobile engine cylinders, pistons, brake pads and the like.