523results about How to "Increase heating rate" patented technology

The invention provides high-entropy alloy powder for 3D (three-dimensional) printing and a method for preparing a high-entropy alloy coating by using the high-entropy alloy powder, and belongs to the technical field of coating preparation. By the high-entropy alloy powder, the wear resistance of the existing powder materials for 3D printing is improved. The high-entropy alloy powder is prepared by using the following ingredients in atomic percentage by weight: 16%-25% of Ni, 16%-25% of Co, 16%-25% of Cr, 16%-25% of Ti and 16%-25% of V. The preparation method comprises the following steps of (1) performing ball-mill mixing on raw materials to obtain mixed powder; (2) grinding and cleaning a matrix; and (3) placing the mixed powder in a powder feeder of 3D printing equipment and sintering the mixed powder on the surface of the matrix to form the high-entropy alloy coating by using selective laser. The NiCoCrTiV coating is prepared by selective laser sintering and has the advantages of high hardness, wear resistance, corrosion resistance and the like. The high-entropy alloy powder for 3D printing and the method for preparing the high-entropy alloy coating by using the high-entropy alloy powder can be widely used in the field of 3D printing.

The invention relates to the technical field of aluminum profile production and particularly relates to a heat treatment device for semi-closed tubular aluminum profiles. The heat treatment device comprises an aluminum profile conveying track, wherein a locating track is fixed at a position, which is parallel to a conveying direction and is close to the middle of the aluminum profile conveying track, of the aluminum profile conveying track, and an internal aluminum profile heating device, an external aluminum profile heating device and a cooling device are arranged at one side of the conveying direction of the aluminum profile conveying track. According to the heat treatment device, various physical properties and internal structural stability of the aluminum profiles can be effectively improved.

The invention discloses a super-stretchable graphene electro-thermal film and a preparation method thereof. The electro-thermal film is formed through knitting graphene fibers with a spiral structure; the fibers not only have ultrahigh elongation at break, and can realize rapid response on a high temperature of 30-420 DEG C under safety voltage of 0.5-5V. The preparation method is simple and specifically comprises the following steps: after chemically reducing graphene oxide, carrying out heat treatment in a high-temperature furnace at 500-3000 DEG C to obtain a graphene film; after uniformly winding, obtaining graphene fibers; and knitting the graphene fibers to obtain the graphene electro-thermal film. The graphene electro-thermal film has ultrahigh heating speed and cooling speed, and ultrahigh temperature response; the working voltage is relatively low so that the graphene electro-thermal film can be used for human bodies and is used as human body heating cloth; and the graphene electro-thermal film has a stretchable property so that the graphene electro-thermal film can be adaptive to the movement of the human bodies, such as muscle stretching, in a utilization process, and furthermore, the graphene electro-thermal film can be widely applied as an intelligent electro-thermal material.

The invention discloses an automatic control device of material cold and hot circulation performance. The device includes a sample chamber in a resistance wire heating cylindrical heating cavity, wherein a spiral cooling water pipe is wound outside the heating cavity; the whole heating cavity is arranged in a thermal insulation device; a high-low limit PID intelligent temperature controller and a relay module control the heating temperature and the on/off of a cooling system; a thermocouple and a data acquisition instrument are adopted to measure temperature and record data; and the device comprises simple structure, efficient experiment and can reduces the labour intensity of experimenter.

The invention discloses a method for extracting lithium carbonate from carbonate brine. A salt-gradient thermal-insulation solar pond is made of clay, a black ethylene-propylene-diene monomer (EPDM) waterproof roll, a geomembrane or high-density polyethylene plastic spraying canvas and the like are paved on the surface of the bottom of the pond to serve as liners, and a heat exchange pipeline is paved at the position 0.5-1m higher than the pond bottom. Lithium-rich brine prepared by freezing and solarization is directly injected into the salt-gradient thermal-insulation solar pond, a layer of fresh water is paved on the surface layer of the brine, the brine is warmed under the dual functions of solar radiation and geothermal water-heat exchange, lithium carbonate is separated out in a concentrated mode, and finally lithium-mixed salt obtained in the salt-gradient thermal-insulation solar pond is scrubbed through appropriate-temperature fresh water. The methods of the salt-gradient thermal-insulation solar pond, the geothermal water-heat exchange, scrubbing of the appropriate-temperature fresh water and the like are combined and applied to extraction of lithium carbonate from carbonate brine, the production efficiency and product quality are greatly improved, the production cycle is shortened, the production cost is reduced, and lithium carbonate ore concentrate can be obtained directly locally.

The invention provides a temperature tactile representation device with variable heat capacity, which is provided with a semiconductor cooler, a radiator, two temperature sensors and a measurement and control circuit, wherein the semiconductor cooler is used as a core of temperature control and hand perception, and consists of a P-N structure which is energized with direct current and is provided a cold end surface and a hot end surface; the radiator comprises a switch chamber with a cavity and a cooling liquid-gas two-path switching system, the cooling liquid switching system feeds cooling liquid to the cavity of the switch chamber by a cooling liquid groove via pipelines, and the switch chamber is communicated with the cooling liquid groove via a cooling liquid outlet pipeline; the gas path switching system switches air by an air inlet pipeline and an air outlet pipeline which are communicated with the cavity of the switch chamber; the pipelines of the cooling liquid-gas two-path switching system are respectively provided with an electromagnetic valve and a pump which are in connection with output control signal of the measurement and control circuit; the measurement and control circuit has a well-known power supply circuit, an analog-to-digital conversion circuit, a signal conditioning circuit and a control chip; and the two temperature sensors are respectively used for collecting temperatures of hand and the semiconductor cooler and outputs the temperatures to the measurement and control circuit.

The laser induced self-spreading high temperature gradient TiNi-TiN material synthesizing process includes the following steps: weighing and mixing metal Ti and Ni powder in the same molar ratio; pressing the mixture into cylindrical sample via maintaining the pressure of 20-50 KN for 1-4 min; keeping the sample at 80-150 deg.c for 1-3 min to eliminate water and partial gas; setting the sample on sample stage inside reaction container, sealing the container, introducing nitrogen in the flow rate of 5-10 L/min for over 2 min, and igniting with CO2 laser and Nd:YAG laser to induce self-spreading high temperature reaction.

A fixing device (30) has a fixing member (30) adapted to be heated by induction heating based on a magnetic field from an induction coil (34). A pressing member (40) is disposed in contact with the fixing member (30) to define therebetween a nip zone (N) for passing a sheet (P) therethrough. The fixing member includes a heating layer (32). The heating layer (32) has a temperature-sensitive metal layer (321) formed on the side of the induction coil (34), and a nonmagnetic-metal layer (322) laminated onto the temperature-sensitive metal layer (321). The nonmagnetic metal layer (321) is made of a metal (copper (Cu)) having a specific resistance less than that of aluminum, and formed to have a thickness (30 μm) allowing the nonmagnetic metal layer to be substantially free from a temperature rise due to the induction heating.

The invention discloses a solar energy air source absorption heat pump device. The solar energy air source absorption heat pump device is characterized in that natural energy source solar energy is taken as the driving energy of the unit, and the solar energy is input by a heating exchanger in a generator to the solar heat pump device to provide power for unit operation; energy in the air is absorbed through an air source heat exchanger coil; and the two parts of energy are released through condensation of refrigerant vapor and fusion heat of the refrigerant vapor and dilute solution, and transferred to hot water, thus the energy utilization rate is improved.

The invention discloses an electric vehicle and a power battery heating system and method, and the method comprises the steps: enabling a motor system to enter a pulse heating mode when a pulse heating entering condition is met, carrying out the pulse heating of a power battery, and enabling a cooling liquid absorbing the heat of the motor system to enter a cooling pipeline of the power battery to heat the power battery; when the pulse heating quit condition is met, enabling the motor system to quit the pulse heating mode, stopping pulse heating of the power battery, and enabling the cooling liquid in the cooling pipeline of the power battery to stop flowing; in a pulse heating mode, enabling quadrature-axis voltage to be equal to zero, adjusting the magnitude of pulse current by controlling direct-axis voltage, generating actual pulse width modulation signals of the six power switches by superposing pulse signals. Three-phase current feedback quantity is not needed, the output pulse current is stable and small in fluctuation, the pulse heating effect of the power battery can be improved, and unexpected driving or shaking of a vehicle in the pulse heating process of the power battery is avoided.

The invention belongs to the technical field of rolled steel, and in particular relates to a method for improving high plasticity of low-carbon silicomanganese cold-rolling phase-change induced plasticity steel. The method comprises the following steps of: selecting the low-carbon silicomanganese cold-rolling transformation induced plasticity steels, smelting and forging so as to manufacture plate blanks, heating the plate blanks to be 1100-1250 DEG C, keeping the temperature, rough-rolling and finish-rolling the plate blanks and air-cooling the hot rolled plates to be 600-750 DEGC, coiling, and subsequently pickling so as to obtain steel plates for cold rolling; cold-rolling in a rolling reduction greater than or equal to 80%; heating the cold-rolled steel plates to be (Ac3-40 DEG C) to (Ac3+30 DEG C) at a heating velocity of at least 80 DEG C/s, carrying out annealing treatment for 5-15 seconds, subsequently cooling to a bainite area of 380-450 DEG C at a velocity of 40-80 DEG C/s, carrying out isothermal treatment for 10-50 seconds, and finally cooling to the room temperature. By utilizing the preparation method, cold-rolling transformation induced plasticity steels with high and strong plasticity is obtained, and the strength of the low-carbon silicomanganese cold-rolling transformation induced plasticity steels is greatly improved on the premise that the plasticity is not lost.

The invention discloses a preheating device, a preheating method, a hot bending machine and a machining method of high-efficiency 3D (Three-Dimensional) cover glass. The preheating device of the high-efficiency 3D cover glass at least comprises a second preheating workstation which adopts electromagnetic induction heating equipment to heat and a third preheating workstation which is located behindthe second preheating workstation and adopts resistance heating equipment to heat. In the scheme, preheating of a molding die is carried out by combining resistance heating with electromagnetic induction heating, so that the heating efficiency can be greatly accelerated; compared with independent resistance heating preheating, half preheating time can be reduced, the preheating time can be shortened to be 10 to 20 seconds, and the preheating speed is increased; compared with independent electromagnetic induction heating, temperature homogenization can be realized by the molding die and coverglass after temperature rising through the electromagnetic induction heating, and the damage to the cover plate during a pressing process due to non-uniform heating temperature can be avoided, so thatthe yield of a 3D cover glass finished product can be increased, and effective combination of efficiency improvement and yield improvement is realized.

The invention discloses protective steel and a production method thereof. The protective steel is prepared from the following components in percentage by mass: 0.10-0.20% of C, 0.10-0.60% of Si, 0.8-1.65% of Mn, 0.02-0.05% of Nb, 0.3-0.8% of Mo, 0.05-0.15% of V, 0.01-0.05% of Ti, 0.01-0.06% of Al, 0.4-1.0% of Cr, 0.0015-0.0025% of B, no more than 0.02% of P, no more than 0.01% of S, no more than 0.008% of N, and the balance of Fe and unavoidable impurities. The problems that in the prior art, high-content C and high-content Mn are added into protective steel, Pcm is designed to be excessivelyhigh, consequently welding performance is lowered, and welding cold cracks and weld joint fatigue cracking are caused are solved, the technical problems of poor cold forming performance and poor low-temperature impact toughness are solved, and the technical effects that the protective steel has good cold forming performance and good low-temperature impact toughness, and safety performance of protected products is improved are achieved.

The invention discloses a production process for obtaining a copper alloy strip with uniform and small grains, and belongs to the metal machining industry. According to the process, an alloy ingot is subjected to hot rolling after high-temperature heating to obtain a slab, the slab is subjected to intermediate annealing, technological parameters of a heating section, a thermal insulation section and a cooling section are controlled in the annealing process, and the copper alloy strip with the uniform and small grains is obtained. The production process is simple and has the greatest characteristic that the copper strip with the uniform and small grains can be obtained on the basis of conventional equipment, thereby having excellent popularization and application values.

The invention provides an internal combustion heating rotation conical biomass gasification furnace which is characterized in that the furnace body is internally provided with two concentric cones, wherein the external cone is a rotation cone and the internal cone is a fixed cone; the top of the rotation cone is connected with a material cylinder at the lower section; the top of the fixed cone is communicated with a smoke gas pipeline; the bottom end surface of the fixed cone is closed and the lower part thereof is tangentially connected with a combustion pipeline; the side wall of the furnace body is arranged as jacket structure; the jacket comprises a high-temperature resistance furnace wall, a combustion gas pipeline, a heat preservation layer and an external wall of the gasification furnace sequentially from inside to outside; the airflow passage in which the combustion gas is led out from the gasification furnace is that the combustion gas is led to the bottom port of the combustion gas pipeline from the bottom of the gasification furnace along the inclined surface of the conical furnace bottom; the delivery outlet of the combustion gas is arranged at the upper part of the combustion gas passage; and a gas transmission pipeline connected on the delivery outlet of the combustion gas outside the gasification furnace is connected with a gas storage cabinet by an induced draft fan. The gasification furnace greatly improves the biomass gasification rate and the heat value of the combustion gas.

The invention discloses a device capable of heating a coal reservoir to improve a low-coal-rank coal bed gas yield. The device comprises a truck, a flowmeter, a first gas booster, a second gas booster, a mixed gas separating device, a methane storage tank, a water collecting box and a control system. A U well and multiple exploited wells are drilled in the coal reservoir on the ground, the U wellis composed of a first vertical well segment, a horizontal well segment and a second vertical well segment, a fuel battery air heat exchange system is mounted on the truck, a gas outlet of the fuel battery air heat exchange system is connected with a gas inlet of the first gas booster, a gas outlet of the first gas booster is connected with a well opening of the first vertical well segment, a wellopening of the second vertical well segment is connected with a gas inlet of the second gas booster, a gas outlet of the second gas booster is connected with a gas inlet of the mixed gas separating device, and the exploited wells are connected with an extraction device. Water in a low-coal-rank reservoir is effectively removed, desorption of methane molecules is promoted, and the low-coal-rank coal bed gas yield is improved.

The invention discloses an automatic transfer and loading and unloading device for high-temperature forming molds, a high-efficiency processing system and processing method for 3D cover glass, an automatic transfer and loading and unloading device for high-temperature forming molds, including a forming mold conveying mechanism, which is used to reduce the temperature to not lower than 100 The forming mold of ℃ is moved from the discharge end of the processing equipment to the unloading and feeding station and from the unloading and feeding station to the feeding end of the processing equipment; the unloading and feeding station includes an upper mold moving device for The upper mold of the forming mold is lifted to control the opening and closing of the mold; the sheet taking device is used to take out the molded part from the lower mold of the forming mold, and take the piece from the place to be processed and place it on the lower mold. This solution does not require manual operation and can improve overall processing efficiency and product yield. The output molding die has no temperature limit and can be output at a higher temperature, which can reduce cooling time and reduce the time spent on preheating , which is conducive to improving the overall processing rate and reducing energy consumption.