942 results about "Temperature drop" patented technology

The invention discloses an aircraft wheel cooling method and device, and the method comprises the steps: collecting the temperature of a brake disc and the air pressure of a hub in real time through a temperature and pressure sensor, calculating the temperature change rate and the pressure difference through an embedded processing module, and generating a thermodynamic initial parameter set; calculating a thermal stress distribution value of the brake disc based on the initial parameter set, and generating a cooling liquid flow and spraying angle instruction set in combination with a material threshold database; the opening degree of an annular pipeline piezoelectric valve is regulated according to an instruction set, an injection area is regulated according to flow velocity-surface area heat exchange efficiency, and waste heat is synchronously recovered to optimize power consumption; the thermal infrared imager obtains temperature field distribution, the initial parameter tolerance range is compared, the spraying angle and the flow instruction are corrected through a fuzzy PID algorithm, and temperature gradient errors are eliminated; and based on the temperature drop rate, the pressure stability and the waste heat recovery efficiency, an efficiency index is generated by using a neural network scoring model, and algorithm weights and piezoelectric valve response parameters are dynamically adjusted. The cooling efficiency is effectively improved, and the thermal stress risk is reduced.

The invention provides an energy-saving electrical equipment control cabinet, which belongs to the technical field of electric control cabinet cooling, and comprises a cabinet body, a circulating cooling assembly, a trigger cooling assembly and an electromagnetic reset assembly, the temperature sensor monitors the temperature of the cabinet body in real time and cooperates with the circulating fan and the exhaust fan to realize energy-saving heat dissipation control; the high-heat-conduction particles ensure that the high heat conduction performance can be maintained under different working conditions, even if the environment temperature or the air flowing state is changed, heat can still be transferred, and the heat dissipation effect is ensured; the trigger cooling assembly controls liquid nitrogen release according to the temperature of the cabinet body, automatically triggers liquid nitrogen cooling when the temperature rises to a certain degree, and automatically stops after the temperature is reduced, so that liquid nitrogen is prevented from being excessively used, and an expected heat dissipation effect can be achieved even if the external temperature is relatively high; liquid nitrogen and air are promoted to be fully mixed through the spiral blades, meanwhile, gas-liquid separation can be promoted, a stable low-temperature operation environment is provided for electrical equipment, and damage to the equipment due to too high temperature and moisture is reduced.

According to the deep and far seawater suspension oil and liquid storage device and the underwater oil storage method thereof, a layered tank body structure is adopted, and a load adjusting cabin, a flexible oil storage cabin and a water storage cabin are arranged from top to bottom. The load adjusting cabin is used for dynamically adjusting the net buoyancy of the device through seawater feeding / discharging to reduce the load of the mooring system; the oil storage cabin adopts a flexible storage bag to adapt to volume change and is linked with the water storage cabin through a movable composite heat preservation partition plate, the partition plate comprises an active heating layer and a phase change material layer, when the oil temperature is too low, the active heating layer directionally heats crude oil, the phase change layer absorbs dissipated heat, latent heat is released during external low-temperature impact to buffer temperature drop, and dynamic temperature control is achieved. The device is moored and fixed through a gravity anchor, and multiple types of sensors are arranged to monitor the posture, stress, oil temperature and leakage state of the tank body in real time. The problems of oil storage tank deformation, high pour point oil heat preservation and mooring stability under the deepwater high-pressure environment are solved, and the device has the advantages of being low in construction cost, high in environmental adaptability and efficient in operation and maintenance and is suitable for safe storage and transportation of deep and far sea oil and gas resources.

The present invention relates to the technical field of gallium oxide crystal growth, and in particular to a thermal field structure and a device and method for preparing gallium oxide single crystals based on a guided mold method. The present invention changes the inner cavity at the bottom of the thermal field structure from a circular cavity to an elliptical cavity, so that the thermal field structure in the width direction of the mold extends toward the mold side, thereby improving the thermal insulation of the thermal field structure on both sides of the mold, and then prompting the mold core to move closer to the edges on both sides of the mold, ensuring the constant temperature gradient on the mold surface during the shouldering process of the crystal, avoiding temperature differences, and improving production efficiency. In addition, since the extended thermal field structure will make the air inlet airflow closer to the mold surface, resulting in the problem of cold airflow directly blowing the crystallization area on the mold surface, a drainage port is added below the air inlet to guide the cold airflow to the crucible position, thereby ensuring the effect of the mold core moving closer to the edges on both sides of the mold.

The invention discloses a control method of a precise constant-temperature test chamber, and relates to the field of technical temperature control and automatic tests.The method adopts a control system of the precise constant-temperature test chamber for operation, and comprises a temperature control module, a test process automation module, a linkage coordination module and a data feedback diagnosis module. The control method of the precise constant-temperature test box comprises the following steps: detecting temperature data in the test box in real time through a temperature sensor, and transmitting the data to a temperature control module; according to the preset target temperature and the current temperature data, a segmented temperature rise or temperature drop strategy is adopted, and automatic switching between low-speed temperature change and high-speed temperature change is achieved; in the temperature change process, the current test process parameters are detected through a judgment module, a parameter linkage formula between the temperature and the test steps is established, and temperature control parameters are subjected to linkage adjustment; according to the invention, the limitation caused by independent operation of the traditional temperature control and test process is solved.

The invention discloses an extruding machine for aluminum profiles, which belongs to the technical field of extruding machines and comprises an extruding machine body, and a die module, an extruding module and a hydraulic safety module are arranged on a station table; the mold module comprises an installation mold base arranged on the station table, and a discharging mold used for aluminum profile forming is detachably installed on the installation mold base. The extrusion module comprises a foundation seat mounted behind the mounting die holder, an extrusion die holder is arranged on the foundation seat, and an extrusion template is arranged at the end part of the extrusion die holder. In the aluminum blank transfer stage, the extrusion inner mold core is continuously heated through the electromagnetic induction technology of the heating coil, so that the mold temperature is consistent with the aluminum blank temperature; when an aluminum blank enters the extrusion cylinder, the electric push rod drives the heating coil to move to the preheating channel from the constant-temperature annular opening, the aluminum blank is subjected to compensation heating through constant-speed movement, the problem of temperature drop in the transferring process is solved, mechanical locking is conducted on the pressure induction type hydraulic column through the multiple clamping pieces, pressure stability in the shutdown stage is maintained, and extrusion continuity is ensured.

The invention provides a multi-protocol compatible pole charging safety state sensing and early warning system, and relates to the technical field of pole charging safety state sensing. The data acquisition module acquires component data and environment data of the electrode charging system; the pole charging strategy generation module outputs a pole charging strategy; the electrode charging temperature rise prediction module outputs a temperature prediction curve of an electrode charging system component; the liquid cooling calculation module outputs an electrode charging system component temperature drop curve; the theoretical temperature obtaining module obtains the theoretical electrode charging system component temperature. The safety state sensing module judges whether the electrode charging process is safe or not. According to the invention, the technical barrier is broken through the multi-protocol compatibility, and the construction and operation cost of the polar charging network is reduced; through precise temperature control and active early warning, the worry of a user on pole charging safety is solved, the acceptance of a consumption end is improved, obstacles are cleared away for popularization of a high-power pole charging technology, the power-assisted electric two-wheeled vehicle industry breaks through the charging efficiency bottleneck, the target of faster and safer charging is accelerated, and the method has remarkable technical value and industrial significance.

The invention provides a seamless steel tube and a preparation method thereof. The preparation method comprises the following steps that S1, metallurgical raw materials are smelted, and a blank is obtained; s2, perforating the blank to obtain a tubular billet; s3, the tubular billet is rolled, an obtained pierced billet is subjected to first rapid cooling, the first rapid cooling comprises first rapid cooling and second rapid cooling, and the temperature of the pierced billet is reduced by 30-150 DEG C in the first rapid cooling process; the temperature of the pierced billet is reduced by 30-150 DEG C in the second rapid cooling process; s4, the pierced billet subjected to first rapid cooling is subjected to sizing or reducing treatment, an obtained steel pipe is subjected to second rapid cooling, and the temperature of the steel pipe subjected to second rapid cooling ranges from 550 DEG C to 650 DEG C; and S5, the steel pipe obtained after second rapid cooling is subjected to air cooling. By reasonably arranging the cooling path, the hot-rolled seamless steel pipe with small straightness and ovality and excellent obdurability can be obtained.

A liquid immersion cooling system, that cools a heat generating body provided on a substrate, includes: a cooling device main body having a casing that houses the substrate and the heat generating body inside and stores a refrigerant for cooling the heat generating body; a circulation flow channel having both ends connected to each other in a communication state in the casing; an adsorption unit that is provided in the circulation flow channel and adsorbs impurities from the refrigerant circulating in the circulation flow channel; a pump that circulates the refrigerant in the circulation flow channel; and a control device that controls the pump. The control device includes a temperature drop detection unit that detects a decrease in temperature of the refrigerant in the casing, and a pump drive unit that drives the pump based on a detection of the temperature drop detection unit.

The invention provides an intelligent window with spectrum regulation and control and phase change energy storage functions and a preparation method of the intelligent window, and belongs to the field of door and window equipment. The intelligent window comprises a first high-light-transmittance film, temperature-sensitive gel, a second high-light-transmittance film and a phase change composite material which are sequentially stacked. According to the invention, the temperature-sensitive gel plays a role in spectrum adjustment, before and after phase change, the temperature-sensitive gel is converted from transparent to opaque, the sunlight transmittance is significantly reduced, the light transmittance is significantly reduced when the temperature rises to be close to the phase change temperature of the temperature-sensitive gel, and the entry of solar heat is reduced; the phase-change composite material can absorb heat on the surface of the window, increase thermal inertia of the window, slow down temperature rise of the surface of the window, reduce indoor thermal radiation and convection of the window, release heat at night, delay temperature drop of the window, change from opaque to transparent before and after phase change, and remarkably improve sunlight transmittance. The temperature is continuously reduced at night, high haze is presented, and the privacy protection effect is achieved.

The invention discloses a cooking control method, a cooking utensil, a storage medium and electronic equipment. The method comprises the steps that when a target dish cooking instruction is received, heating operation and pressure maintaining operation are conducted on the cooking utensil according to pressure cooking parameters, when preset pressure maintaining duration is reached, exhausting and pressure relief are started, heating operation is conducted on the cooking utensil according to non-pressure cooking parameters after pressure relief is completed, and heating is stopped when dish adding and cover opening information is detected, calculating a temperature drop average value according to recorded bottom temperature drop change data after detecting a dish adding ending and cover closing signal, updating the initial dish adding cooking time length based on a comparison result of the bottom temperature drop average value and a temperature change threshold value, obtaining the dish adding cooking time length, and continuing heating according to the non-pressure cooking parameters, and the vegetable adding cooking time is reached. By means of the electric pressure cooker, the problem that an electric pressure cooker in the related technology cannot adapt to various food materials and needs to be cooked in a time-sharing mode is solved.

The invention discloses a molten drop arc-laser induced additive and subtractive integrated manufacturing system and method. The method comprises the steps that raw materials are heated through one or more energy sources to form molten drops; multiple kinds of energy are synchronously applied to molten drops to form a composite molten pool, in-situ coupling of additive and subtractive materials is achieved, and material removal is conducted on a cladding layer while material adding is conducted in the composite molten pool; dynamically adjusting the energy ratio and spatial-temporal distribution of each energy field, and optimizing the droplet transition and metallurgical quality; when the temperature of the cladding layer is reduced to a solid-liquid mixing interval or a thermoplastic deformation interval, shaping and surface processing are carried out, and the ideal component shape and surface smoothness are achieved; energy field parameters are dynamically adjusted based on real-time feedback of multi-sensor data, residual stress is inhibited in combination with a heating compensation technology, the heating compensation technology is used for effectively controlling heat input and stress release, and it is ensured that the stress state of a component in the manufacturing process is effectively managed.

A method and system for locating a branch conduit opening into a main pipe following lining the main pipe with a liner includes moving a robot down the lined main pipe and scanning the liner using an infrared scanner mounted on the robot. A temperature drop outside the liner as compared to the adjacent surfaces to acquire infrared data is sensed with an infrared scanner. The infrared data is compared with other location data regarding the branch conduit opening and a branch conduit opening location outside of the liner is determined based on the infrared data and the other data. In another aspect, the infrared scanner is tuned to more particularly sense temperatures associated with the presence of a branch conduit opening.

The invention provides a door opening control method of fabric treatment equipment and the fabric treatment equipment, and belongs to the field of fabric treatment equipment. When the cylinder door of the target cylinder of the fabric processing equipment needs to be opened, the air distribution device can be correspondingly controlled according to the temperature information of the target cylinder and the temperature information of the non-target cylinder, so that when the temperature in the target cylinder is too high, the cold air flow in the non-target cylinder can be used for cooling the target cylinder; therefore, the temperature reduction in the target cylinder is accelerated, the air flow in the non-target cylinder can be fully utilized to cool the target cylinder, and the door opening waiting time of the target cylinder is shortened.

The invention relates to the technical field of valve test, and discloses an electro-hydraulic remote control valve low temperature performance test device, which comprises a low temperature performance test box and tested equipment, and is characterized in that the low temperature performance test box is internally provided with a refrigeration device, a low temperature sudden drop area, an icing test area, an air tightness test area and a test buffer area; the low-temperature performance test box provides an installation and debugging environment for each test area; the refrigeration device is arranged at the head end of the low-temperature performance test box, the low-temperature sudden drop area is adjacent to the refrigeration device, the icing test area is adjacent to the low-temperature sudden drop area, the air tightness test area is adjacent to the icing test area, and the test buffer area is adjacent to the air tightness test area. The low-temperature performance test device comprises various test areas including a low-temperature sudden drop expectation area, an icing test area, a confidentiality test area and a buffer test area, and parameters of the test areas can be adjusted and combined and split according to test requirements, so that the valve in a low-temperature environment can be tested in an omnibearing manner.

The invention relates to the technical field of circulating water anti-freezing, and discloses a power plant circulating water anti-freezing system suitable for a cold region, and the system comprises a temperature sensing module, an anti-freezing heating module, a water flow disturbance module, an ice layer processing module, an intelligent regulation and control center and a fault safety module; when the circulating water system of the power plant operates in a cold region, the internal water temperature and external environment parameters of key nodes of a circulating water pipe network are monitored in real time, and a low-temperature early warning signal is generated based on a temperature field reconstruction algorithm of machine learning, so that abnormal temperature fluctuation can be recognized in time, early warning delay and false alarm caused by wind speed and humidity interference are avoided, and the working efficiency is improved. And in the circulating water anti-freezing process, the output power of the flexible electric heating body is dynamically adjusted through a graded heating mechanism, and the turbulence generator is linked to optimize water flow distribution, adapt to thermal inertia change of a pipeline and prevent the risk of local icing caused by sudden temperature drop.

The present invention relates to the field of metal materials and provides acid-resistant pipeline steel and a manufacturing method therefor. The chemical components of the acid-resistant pipeline steel comprise, in percentage by weight: 0.02-0.06% of C, 0.10-0.30% of Si, 0.80-1.10% of Mn, 0.02-0.08% of Nb, 0.06-0.12% of V, 0.20-0.30% of Ni, Mo ≤ 0.08%, 0.03-0.06% of Al, 0.0005-0.0030% of Ca, P ≤ 0.008%, S ≤ 0.002%, 0.004-0.006% of [N], [O] ≤ 0.002%, [H] ≤ 0.0015%, B ≤ 0.0008%, and the balance being Fe and inevitable impurities. The acid-resistant pipeline steel is obtained by sequentially carrying out KR pre-desulfurization, BOF top-bottom combined blowing smelting, LF refining, RH refining, continuous casting with stack cooling, heating, steel rolling, rapid water cooling, and heat treatment on blast furnace molten iron. By means of the synergistic effect of composition design and process optimization, the present invention solves the problems of poor low-temperature drop-weight tear test performance and large strength variation across the same plate in acid-resistant pipeline steel.

The invention provides a refrigeration material, a preparation method and a refrigerator, the refrigeration material is NixTi100-x, x is 50.6-58.0, and the refrigeration material NixTi100-x comprises austenite (B2 phase) coarse grains and a nanometer precipitated phase. According to the method, the Ni-rich NiTi alloy with the nano precipitated phase (the atomic weight ratio of Ni is 50.6%-58.0%) is used for refrigeration, the supersaturated Ni can effectively reduce the phase transition temperature and broaden the lower limit of a hyperelastic temperature zone, the nano precipitated phase can strengthen austenite coarse grains (increase the high-temperature yield strength of the austenite coarse grains), the upper limit of the hyperelastic temperature zone of the material is improved, and the super-elastic temperature zone of the material is improved. The alloy material can have superelasticity at least in a temperature range of 203K to 503K (a temperature span of 300K in total); benefited from large latent heat generated by phase change of the coarse grain # imgabs0 #, temperature change of 5K-33.6 K can be generated during adiabatic compression deformation of the coarse grain # imgabs0 #; wherein the temperature zones with the adiabatic temperature drop amplitude larger than or equal to 10K and larger than or equal to 20K can reach 200K and 110K respectively.

The invention discloses a titanium and titanium alloy thin bar continuous rolling production line and a rolling method. The rolling production line comprises a roughing roller set, a compensation heating device, a pre-finishing roller set, a temperature control device, a finishing roller set and a coiling device which are sequentially and linearly arranged. According to the production line, the (square) blanks can be linearly and continuously rolled into finished thin bars from one end to the other end, and the finished thin bars are coiled, so that the problems that the operation burden and the operation hidden danger exist in current reciprocating rolling, the temperature drop of the blanks cannot be effectively compensated in the continuous rolling process, and the production efficiency is low are solved. The problem that the temperature drop is further increased during material transfer among the procedures of radial forging, rough rolling and finish rolling is solved, so that the machining efficiency and yield of the titanium and titanium alloy coiled thin bars are effectively improved, meanwhile, the quality of finished products is further guaranteed through compensation and temperature control, and compared with remelting compensation after material transfer at present, the working efficiency is effectively improved, and the production cost is reduced. And the temperature compensation amplitude is reduced, so that the energy consumption of the whole processing stage is reduced.

The invention relates to the technical field of performance testing, in particular to an all-weather outdoor surface radiation refrigeration performance testing system which comprises a testing mechanism used for collecting testing data of a tested material, and the testing mechanism comprises a main testing module used for testing the material and an auxiliary material testing module used for testing a contrast material; the small meteorological station is used for collecting data of an external environment and is arranged on one side, facing the sun, of the testing mechanism; the upper computer is used for collecting and analyzing data collected by the testing mechanism and the small meteorological station; the portable data collector is in data interaction connection with the small-sized weather station and the test mechanism, and the portable data collector is used for transmitting data collected by the small-sized weather station and the test mechanism to the upper computer. According to the invention, data such as environment temperature, humidity, solar radiation intensity, illuminance and surface temperature drop can be obtained in real time; performance evaluation and feasibility analysis are carried out on the refrigeration power, the cooling capacity and the heat exchange capacity of the tested material.

The invention relates to the technical field of continuous casting and rolling production, in particular to a casting blank temperature drop calculation method in a casting-rolling connection process embedded with a scheduling plan, which comprises the following steps: establishing a casting blank whole-process heat transfer model, and calculating the temperature of a casting blank in real time; according to the casting blank temperature information and the production order information, a hot rolling scheduling plan is made in real time; and performing production scheduling according to the hot rolling scheduling plan. According to the method, in the casting and rolling connection process, a casting blank temperature drop calculation method is embedded into a scheduling plan to achieve corresponding functions, the temperatures of all casting blanks from the time after cutting to the time before the casting blanks enter a heating furnace can be rapidly, accurately and stably calculated and predicted in real time, and the obtained casting blank temperature information is used for formulating a hot rolling scheduling plan. Therefore, the problems of casting blank hot feeding, hot charging and red feeding crack surface defects, intensified hot casting blank oxidation burning loss and the like are effectively solved, the metal yield is increased, and the utilization of heat of the cut casting blank is improved.

According to the technical scheme, the bamboo-plastic-steel composite external wall panel is characterized by comprising a first plastic-steel panel, a second plastic-steel panel is arranged on one side of the first plastic-steel panel, and a transverse partition plate is fixedly connected between the first plastic-steel panel and the second plastic-steel panel; the dynamic heat insulation assembly is arranged on one side of the second plastic steel panel and used for adjusting the temperature in the building; by arranging the heat insulation assembly, when the temperature is high in summer, an organic acid solution in a storage pipe is subjected to phase change, absorbs external heat and changes the liquid state into a solid state, the heat insulation effect is achieved, when the temperature is reduced in winter, the solid organic acid solution is changed into the liquid state, heat is released, and therefore the temperature in a building is increased; and meanwhile, when the external temperature is insufficient and the phase change occurs, the electric heating plate can be started to provide heat and enable the phase change of the organic acid solution, so that the temperature in the building can be dynamically adjusted according to the requirements of residents.

The invention is suitable for the technical field of Hall sensor correction, and provides a Hall sensor correction method and an energy storage system.The Hall sensor correction method comprises the steps that after a loop to be measured is converted into an open-circuit state from a closed-circuit state, in the environment temperature decreasing process, the loop to be measured is corrected; collecting measured values of a target Hall sensor at a plurality of moments and a first environment temperature; the target Hall sensor is used for measuring the physical quantity of the loop to be measured; updating a null drift correction table of the target Hall sensor based on the measured values of the multiple moments and the first environment temperature; the null drift correction table comprises a plurality of preset second environment temperatures and first null drift correction values corresponding to the second environment temperatures; and when the loop to be measured is in a closed state, correcting the target Hall sensor based on the null drift correction table. According to the invention, the Hall sensor can be corrected through the newest zero drift corresponding to the current temperature all the time, so that the accuracy of the measurement result of the Hall sensor under the abnormal temperature is improved.

The invention provides a quenching liquid cooling speed testing device system and a quenching liquid cooling speed testing method. The quenching liquid cooling speed testing device system comprises a cooling speed testing device, a stirring device, a temperature measuring device, a fixing device and a cooling speed testing and collecting device. The cooling speed testing device is a hollow box body with an opening in the upper end; a U-shaped pipe with an opening in the upper end is fixed in the hollow box body; the heights of the two ends of the U-shaped pipe are different, the higher end is a first branch pipe, and the lower end is a second branch pipe; a temperature measuring device is arranged in the first branch pipe; a stirring device is arranged in the second branch pipe; and a fixing device is connected above the cooling speed testing device. By improving the cooling speed testing device, the temperature drop curve and the cooling speed in the quenching process can be conveniently and quickly tested, the actual working condition of a site can be better simulated, it is ensured that quenching liquid is in a stable state in the testing process, and then the accuracy and the reliability of a quenching testing result are improved.

The invention relates to the field of high-end ultrasonic transducer manufacturing, and particularly discloses a patch type ultrasonic transducer for deep tissue imaging and an acoustic material preparation method, and a backing preparation method comprises the following steps: weighing an adhesive, a metal filler and a non-metal additive according to a mass ratio of 15: 55-75: 2; fully and uniformly mixing the weighed raw materials, and putting the mixed sample into a molding mold capable of demolding; the pressure is maintained for 10-30 min under the conditions that the pressure is larger than 10 MPa and the plasticizing temperature of the adhesive is reached, then the heating function is turned off, when the temperature is reduced to 120 DEG C, the pressure is rapidly reduced to 0 MPa at the moment, the adhesive is taken out when the adhesive is naturally cooled to the room temperature, and the backing is obtained. The problems of high sound attenuation, low sound impedance and low sound velocity preparation of the backing are solved, the dilemma problem of low sound impedance and ultrahigh sound attenuation is effectively solved, and the problem that the ultrathin design of the wearable patch type ultrasonic transducer conflicts with the maintenance of excellent acoustic performance due to insufficient sound attenuation of the existing backing is effectively solved.

The invention belongs to the technical field of vehicle power system thermal management control, and particularly relates to a system temperature cross-domain thermal management method of a power unit, which comprises system temperature loop parameter setting, temperature drop strategy design based on temperature cross-level and consumption reduction strategy design based on temperature cross-level. In the acting process of the thermal management system, firstly, a heat dissipation loop needs to carry out temperature positioning and temperature cross-domain judgment according to temperature ring temperature domain interval setting. And according to the temperature rise regulation stage or the temperature drop regulation stage of the system, the heat management system comprehensively regulates the rotating speed and response time of the fan in combination with the initial temperature interval and the temperature cross-domain level, so that efficient heat dissipation of the fan with the temperature cross-domain change in the operation process is met, and normal operation of the system is guaranteed. Meanwhile, according to real-time changes of the temperature field, the heat management system reduces the rotating speed of the fan in time so as to reduce the energy consumption requirement of the system, and the fuel economy and the energy utilization rate of the vehicle are effectively improved.

The invention provides a high-quality TC4 titanium alloy wire and a preparation method thereof, and relates to the technical field of biomedical metal materials, and the preparation method comprises the following steps: preparing materials according to TC4 titanium alloy components, carrying out vacuum consumable smelting, obtaining a titanium ingot blank, carrying out cogging forging, carrying out continuous rolling, heating a TC4 black skin wire to a titanium alloy beta single-phase region temperature, and carrying out high-temperature rounding, then heating the wire material subjected to high-temperature rounding to the titanium alloy alpha + beta two-phase region temperature and carrying out high-temperature rounding again; and finally, peeling and drawing at high temperature. Through a cross-phase region high-temperature rounding process, deformation is carried out in a beta region by utilizing a coupling effect among temperature, tissue and deformation, and strain energy is gathered at a grain boundary; along with the temperature drop after discharging and the temperature drop in the deformation process, the material enters an alpha + beta two-phase region, an alpha phase is preferentially separated out at and near a beta grain boundary containing a large amount of distortion energy and is crushed and spheroidized in the deformation process, and meanwhile, a twisted sheet-shaped alpha phase is formed in the crystal. And the crystal boundary spheroidized alpha phase is uniform and fine, so that the tensile strength of the material is improved.

The invention relates to the technical field of asphalt, and particularly discloses modified asphalt for drilling fluid and a preparation method of the modified asphalt, and the modified asphalt comprises the following components in parts by weight: 100 parts of matrix asphalt, 12-15 parts of sulfonated modified monomer, 3-5 parts of zwitterionic modified monomer, 2-3 parts of crosslinking modifier, 3-5 parts of environment-friendly activating aid, 2-4 parts of neutralization regulator and 90-110 parts of deionized water. The preparation method comprises the following steps: firstly, melting and activating the matrix asphalt, and adding the environment-friendly activating aid to prepare the activated asphalt; carrying out gradient heating, and adding a sulfonated modified monomer, a zwitterionic modified monomer and a cross-linking modifier step by step to complete composite cross-linking modification; and finally, cooling, adding a neutralization regulator to adjust the pH value, adding deionized water, performing high-speed shearing and homogenizing, and cooling to obtain a finished product. The modified asphalt is stable and controllable in viscosity, excellent in high and low temperature filtration loss control performance, adaptive to complex drilling working conditions, environment-friendly in process and easy to implement.

The invention relates to the technical field of casting, in particular to a casting shrinkage cavity defect prediction method and system based on a virtual simulation technology. The method comprises the following steps: acquiring casting planning information, analyzing the casting planning information, and determining simulation parameters; performing analogue simulation according to the simulation parameters to obtain a simulation result, and determining a shrinkage cavity condition according to the simulation result; obtaining casting demand information, analyzing the casting demand information, and determining expected flatness; according to the shrinkage condition, the simulation parameters are adjusted, and according to the adjusted simulation parameters, the steps are repeated until the simulation result meets the expected flatness. And a possible shrinkage cavity area can be accurately identified. These zones typically appear where the temperature drops faster or where the cooling is uneven. Therefore, clear reference is provided for subsequent process adjustment. The quality standards of the castings in appearance and function are determined according to the actual purposes of the castings and customer requirements.

The invention discloses an oversize LNG storage tank mixed medium precooling dynamic regulation and control system and method, and relates to the technical field of LNG storage tank precooling, and the system comprises a precooling medium supply module for providing two or more precooling media; the pre-cooling spraying distribution pipe network is arranged at the top of the inner tank of the LNG storage tank and is used for uniformly spraying a pre-cooling medium into the storage tank; the pre-cooling process control module is used for sequentially controlling the switching, proportioning and conveying rate of liquid nitrogen and LNG according to a preset stage; the thermal stress control and temperature difference balance subsystem is used for monitoring and adjusting the temperature difference of each area in the storage tank; the boil-off gas recovery module is used for collecting and treating natural gas boil-off gas caused by temperature drop in the pre-cooling process; the pre-cooling pre-safety control unit is used for executing air tightness detection, replacement, drying and cold brittleness pre-judgment operation before pre-cooling; a liquid nitrogen and LNG mixed medium pre-cooling scheme is adopted, and more efficient temperature reduction speed and uniformity can be achieved.