438results about "Testing metals" patented technology

The invention discloses a bonding silver wire quality detection method and system, and relates to the technical field of bonding quality detection.The bonding silver wire quality detection method comprises the steps that a thermal infrared imager is adopted to scan a bonding area, and temperature field distribution data in the bonding process is obtained; scanning the bonding area by adopting a magnetic conductivity measuring probe to obtain magnetic conductivity distribution data of the bonding area; performing 10 * 10 grid division on the bonding area, and performing feature extraction on the temperature field distribution data and the magnetic conductivity distribution data based on divided grids to obtain thermal feature parameters and magnetic feature parameters; and calculating a bonding silver wire quality score according to the thermal characteristic parameters and the magnetic characteristic parameters, and judging the bonding quality of the silver wire according to a score result to obtain a bonding quality evaluation result. According to the method, the limitation of traditional single parameter detection is broken through, the accuracy and reliability of bonding quality evaluation are remarkably improved, and a systematic technical support is provided for improvement of the bonding process level.

The invention provides a titanium plate performance analysis method and system, and relates to the technical field of metal material detection.The method comprises the steps that an optical scanner is adopted to establish a three-dimensional structure on the surface of a titanium plate, and test areas are divided; synchronously acquiring stress, hardness and conductivity data of a test point by using a multi-probe collaborative detection device; constructing a dual-branch feature extraction network, wherein the dual-branch feature extraction network comprises a surface topography feature branch and a physical feature branch; performing statistical integration on the features in the test area, calculating distribution features and determining a weight coefficient; and generating a performance analysis result through feature fusion and a multi-task output layer, and finally determining the performance grade of the titanium plate. According to the method, deep fusion of morphology information and physical characteristics is realized, and the accuracy and reliability of titanium plate performance evaluation are improved.

The invention relates to the technical field of titanium alloy detection, and discloses a titanium alloy wire performance detection method, equipment and system. The method comprises the following steps: acquiring real-time force value displacement data of a tensile test and echo signal data of ultrasonic detection, and processing to obtain smooth force value displacement data and spectrum characteristic parameters; performing feature layer fusion on the yield strength, the tensile strength, the peak frequency and the amplitude attenuation rate to construct a first multi-dimensional feature matrix; inputting a pre-trained deep belief network model, and predicting mechanical properties such as elongation and hardness value; and comparing with a preset threshold value, marking unqualified items and generating a detection report. According to the method, through multi-source data fusion and advanced algorithm processing, the comprehensiveness and accuracy of detection are improved, efficient evaluation of the performance of the titanium alloy wire is achieved, and the method is suitable for the strict detection requirements for the quality of the titanium alloy wire in the fields of aerospace, medical instruments and the like.

Embodiments relate to system and methods involving use of a technique for managing a database for producing a material composition having a thermodynamic phase. The technique can include: receiving a binary phase diagram for each material to be used as a component of a high-entropy alloy (HEA); using one or more active learning machine learning techniques for generating a feature, the feature including: a primary feature that is representative of a probability that an HEA will exhibit a solid solution phase and / or an intermetallic phase, and a physics-based feature that is representative of a factor related to formation of a desired intermetallic HEA phase; encoding the primary feature and the physics-based feature; generating an output representation of a HEA alloy composition and phase of a predicted materials composition; and selecting a HEA composition and phase that will meet a material design criterion.

The invention discloses a converter steelmaking molten pool carbon content detection method and system, a medium and a terminal, and the method comprises the steps: responding to a converter steelmaking signal, starting a three-section model, and obtaining the height of an oxygen lance and the oxygen flow of the oxygen lance in real time in the converter steelmaking process; a first carbon content detection value of a molten pool in the converter at the current moment is obtained through real-time analysis by utilizing a three-section type model and combining the height of an oxygen lance, the oxygen flow of the oxygen lance, the weight of waste steel added into the converter, the weight of molten iron and the carbon content; when the converter is in the last steelmaking stage, if a detection signal sent by the detection equipment is received, a second carbon content detection value of the molten pool in the converter at the current moment is obtained through real-time analysis based on the detection signal, and the first carbon content detection value and the second carbon content detection value are fused to obtain a carbon content detection result of the molten pool at the current moment. According to the method, the influence of the oxygen lance position, the oxygen flow and feeding on the decarburization rate is considered, the carbon content detection in the whole steelmaking process is realized, and the detection precision in the last steelmaking stage is optimized.

The invention belongs to the technical field of outer pipeline obstacle-crossing carrying robots, aims to complete the detection task of the whole circumference of the surface of an outer pipeline in a narrow working space, and discloses an outer pipeline obstacle-crossing carrying robot in a complex environment, which comprises a self-adaptive clamping unit, a middle motor joint bending obstacle-crossing unit and a combined wheel type moving unit, the self-adaptive clamping units are connected to the front portion and the rear portion of the middle motor joint bending obstacle crossing unit, the combined wheel type moving unit is connected with the self-adaptive clamping units, a connecting rod body serves as a power source for active clamping of a single-side arm through a worm and gear, and the robot conducts inchworm type axial movement through the middle motor joint bending obstacle crossing unit. Front-back movement and directional rotation are carried out through the combined wheel type moving unit. The device can adapt to space inclined and bent pipeline structures, has the capacity of treating obstacles such as pipe diameter abrupt change, pipeline hanging brackets and bosses, and has certain load capacity.

The invention discloses a test method for exploring the inhibition effect of a coating on GIL metal particles, and relates to the technical field of high-voltage transmission lines and insulation, the test is carried out in a GIL test platform, and the test method comprises the following steps: S1, selecting a coating material; s2, determining a film covering position; s3, selecting proper particles; s4, determining a particle placement position; s5, carrying out a pressurization test; and S6, observing the motion state of the particles under high voltage, recording the take-off voltage, the stop voltage and the distribution range of the particles, and analyzing the effect of the film on inhibiting the take-off of the particles. According to the test method for exploring the inhibition effect of the covering film on the GIL metal particles, the inhibition effect of the covering film on the metal particles in different shapes is observed and compared through tests, and a basis is provided for practical application of the covering film.

The invention discloses a cooling liquid corrosion performance testing method and equipment, and belongs to the technical field of cooling liquid performance tests.The cooling liquid corrosion performance testing equipment comprises a bottom frame, a test board is fixedly connected to one side of the top end of the bottom frame, a detection mechanism is assembled in the test board, and an industrial personal computer is fixedly connected to the top end of the test board; a test door is arranged on the other side of the top end of the bottom frame from the side close to the test board to the side far away from the test board, a test cabinet is fixedly connected to the other side of the top end of the bottom frame, an opening and closing movable mechanism is assembled between the test door and the test cabinet, two first clamping plates are arranged in the test door, and a first fixing mechanism is assembled between one first clamping plate and the test door. The normal-temperature standing chamber and the high-temperature vibration chamber are arranged, the corrosion performance of the cooling liquid when an automobile is not used can be simulated and tested, the corrosion performance of the cooling liquid when the automobile is used can also be simulated and tested, and the corrosion performance of the cooling liquid can be more accurately tested by combining the test results of the normal-temperature standing chamber and the high-temperature vibration chamber.

The invention relates to the technical field of flux-cored wires, and discloses a high-rust-resistance flux-cored wire preparation method which comprises the following steps of S1, raw material pretreatment, S2, powder adding and forming, S3, surface modification and S4, finished product inspection. Before work is started, a worker prepares raw materials including high-carbon ferrochrome, tungsten carbide, boron carbide, rare-earth metal oxide and ferromolybdenum powder, then grinding equipment is used for grinding the raw materials, then the ground powder is dried for 2-3 hours through equipment at the temperature of 100-150 DEG C, the dryness of the raw materials is guaranteed, and the raw materials are evenly mixed. The method comprises the following steps: firstly, preparing a flux-cored wire, then uniformly stirring by utilizing three-dimensional mixing equipment, and then mixing and proportioning according to different proportions according to a corrosion-resistant flux-cored wire, an acid-base-resistant flux-cored wire and a high-hardness high-temperature-resistant flux-cored wire, so that the welding wires with corresponding properties can be conveniently used according to different environments, and the maximization of the functionality of the welding wire is improved.

The invention relates to the technical field of low-voltage electric appliances, and particularly discloses a bimetallic strip detection device and a detection method. The bimetallic strip detection device comprises a bottom plate, a first mounting seat, a displacement detection piece, a second mounting seat, a thrust detection piece, a driving mechanism and a control system. The first mounting seat is arranged on the bottom plate and is provided with a bimetallic strip fixing part and a displacement detection piece close to an active layer of the bimetallic strip; the second mounting seat is slidably connected to the bottom plate to get close to or away from the first mounting seat; the thrust detection piece is arranged on the second mounting seat and is close to the passive layer of the bimetallic strip; the driving mechanism is connected with the second mounting seat; and the control system can receive the displacement transmitted by the displacement detection piece and the thrust transmitted by the thrust detection piece, and control the driving mechanism to drive the second mounting seat to move according to a preset mode. The bimetallic strip detection device can simultaneously detect the displacement and thrust of the bimetallic strip under a specific current, and provides data support for design and inspection work of a circuit breaker.

A method for creating a prediction model for corrosion of metals includes using as training data a plurality of label images which indicate a distribution of substances present in a corrosion process of a metal surface, in terms of a distribution of labels, in a plurality of time-series visible light images indicating the corrosion process on the metal surface to create a prediction model for corrosion of metals which predicts a future change in a corrosion state of a metal surface to be predicted from a visible light image of the metal surface. The number of the labels is set according to the number of types of the substances. The distribution of the labels is created based on a color distribution of coordinate values in color space of the visible light images.

The invention discloses a risk assessment method based on a steel structure net rack, and belongs to the technical field of building structure safety assessment, and the method comprises the steps: S10, carrying out the sampling detection of a steel material of the steel structure net rack, obtaining the performance parameters of the steel material, and enabling the performance parameters to comprise mechanical parameters; s20, geometric parameters and load parameters of the steel structure net rack are obtained based on the mechanical parameters, wherein the geometric parameters comprise the length of a rod piece, node coordinates and the span and height of the net rack; and S30, screening the performance parameters, the geometric parameters and the load parameters, and removing abnormal values of the performance parameters, the geometric parameters and the load parameters. By combining the performance parameters, the geometric parameters and the load parameters, the safety performance of the steel structure grid frame under different working conditions can be comprehensively evaluated, the collected stress data can be analyzed through a machine learning method, the stress distribution prediction model is constructed, the stress concentration area can be more accurately determined, and the safety performance of the steel structure grid frame under different working conditions is improved. Therefore, the potential risk of the structure is comprehensively evaluated.

The present application relates to the technical field of nuclear power plant performance testing and discloses a method for assessing the remaining life of a bursting disk in a large-caliber vacuum system of a nuclear power plant, comprising the following steps: S1, obtaining a first sample of a reference bursting disk after a first fatigue test, obtaining a second sample of a bursting disk to be assessed, and performing a bursting test on the first and second samples to obtain a life coefficient; S2, performing a non-metallic material state test on non-metallic debris in the first and second samples after the test, obtaining non-metallic test results of similar non-metallic materials, and obtaining a first remaining life of the bursting disk to be assessed; S3, performing a metallic material state test on metallic debris in the first and second samples after the test to obtain a second remaining life of the bursting disk to be assessed; S4, obtaining a third sample of the bursting disk to be assessed, and performing a second fatigue test to obtain a third remaining life of the bursting disk to be assessed; and S5, obtaining a final remaining life of the bursting disk to be assessed based on the life coefficient, the first, second, and third remaining lives.

The invention provides a testing device for evaluating the degradation behavior of a degradable bone fixing instrument under complex mechanical loading, and the device can simulate complex mechanical conditions and liquid environment after the degradable bone fixing instrument is implanted into a human body in vitro, and can load pressure and fluid impact force in 1-3 directions at the same time; the temperature can be regulated and controlled to realize degradation at a specific temperature, and a plurality of test samples and degradation liquid can be collected at the same time for characterization analysis due to the multi-flux design, so that the degradation condition of the degradable bone fixation instrument under the complex mechanical loading condition is evaluated. The mechanical loading device is easy and convenient to operate, low in cost, good in universality and expansibility and adjustable in parameter, and the simulation condition is closer to the in-vivo real condition. Compared with a traditional non-mechanical condition, the device can provide a new thought for in-vitro prediction in vivo and short-term prediction of degradation evaluation of the degradable bone implant, and finally facilitates promotion of marketing of the novel degradable bone implant.

The present invention discloses a method for evaluating and regulating the wear resistance of ductile iron based on the electronic work function, which relates to the technical fields of surface engineering and performance evaluation. The method includes collecting the electronic work function data and material characteristic data on the surface of ductile iron; extracting the characteristics of the electronic work function data to obtain the electronic work function characteristics; establishing a mathematical model based on the electronic work function characteristics to analyze the correlation between the electronic work function data and the material characteristic data; analyzing the relationship between the electronic work function characteristics and the wear resistance, and establishing a comprehensive evaluation model to evaluate the wear resistance of ductile iron. The present invention combines characterization techniques, complex data analysis methods and multivariate statistical models at the same time. It can not only deeply understand the connection between the electronic structure and macroscopic properties of materials, but also establish a comprehensive evaluation model to predict the wear resistance of ductile iron; this method guides the design of materials and the optimization of the production process.

The utility model discloses a metal material constant load testing device suitable for a hydrogen environment, which comprises a high-pressure gas storage bin, the high-pressure gas storage bin is hermetically connected with an upper bin cover and a lower bin cover, the upper bin cover is provided with a gas inlet pipeline, the lower bin cover is provided with a gas outlet pipeline, the high-pressure gas storage bin is filled with hydrogen, the upper bin cover is provided with an upper loading rod, and the lower bin cover is provided with a lower loading rod. The upper end of an upper loading rod is connected with a loading head, the lower end of the loading rod extends into the high-pressure gas storage bin, a load sensor is installed on the upper loading rod, a lower loading rod is arranged on the lower bin cover, the upper end of the lower loading rod extends into the high-pressure gas storage bin, the lower end of the lower loading rod is connected with a base, the lower end of the upper loading rod is provided with an upper connector, and the upper connector is connected with a lower connector. A lower connector is arranged at the upper end of the lower loading rod, a constant-load sample is connected between the upper connector and the lower connector, an extensometer is mounted on the constant-load sample, and a temperature sensor and a pressure sensor are mounted in the high-pressure gas storage bin. According to the utility model, a high-pressure hydrogen test environment can be effectively provided, and the performance test of a metal material under a constant load is realized.

A pretreatment system and a pretreatment method for inspecting metal components in a sample are disclosed. The pretreatment system includes a robot including a number of arms that are relatively rotatable with respect to each other, and the tips of the number of arms are movable within an operating radius; a gripper device attached to the tip of the robot, the gripper device including a first gripper unit that grips or releases a dosing head on one side and a second gripper unit that grips or releases a tube on the other side; a dosing head mounting table on which a plurality of dosing heads can be placed; a tube mounting table on which a plurality of tubes with tube caps coupled to tube bodies can be placed; a sample input unit lifting device on which the dosing head is placed and which is movable up and down, and including a tube mounting cup disposed under the sample input unit lifting device and on which the tube is placed, the sample input device being configured to input the sample in the dosing head into the tube placed in the tube mounting cup; a cap opening and closing device configured to separate the tube cap from the tube body or couple the tube cap to the tube body; an acid injection device configured to inject acid into the tube into which the sample has been input by the sample input device or inject distilled water into the tube containing the acid in which the sample has been dissolved; a heat shaker configured to apply heat to and shake the tube containing the acid mixed with the sample to dissolve the sample in the acid; a vision device configured to acquire an image of a set portion of the tube containing the sample solution in which the sample has been dissolved in the acid; and a pipetting device configured to transfer a part of the solution in one tube to another tube.

The invention relates to the technical field of carbon dioxide geological utilization and storage, in particular to a sealing evaluation device and method for a low-melting-point alloy shaft plugging material, and the device comprises an observation cylinder, an outer cylinder, a simulation shaft, a gas channeling simulation mechanism, a formation pressure adjusting mechanism, a cooling mechanism, a shaft pressure adjusting mechanism and an image acquisition unit. The device is reasonable and compact in structure, alloy materials in the simulation wellbore are in an alloy melting stage, the sealing ejector pin prevents liquid alloy from flowing into the first gas injection hole, and after the alloy materials in the simulation wellbore are solidified, the sealing ejector pin is moved downwards, so that the upper end of the sealing ejector pin is located below the first gas injection hole, and the gas channeling simulation mechanism is communicated with the lower portion of the simulation wellbore; when the formation pressure adjusting mechanism works, the formation pressure adjusting mechanism is connected with the confining pressure cavity through the pressurizing hole, the simulation effect on the formation pressure around the simulation shaft can be achieved, the heating melting-cooling forming process of the low-melting-point alloy material is achieved, and the sealing capacity of the alloy plug-sleeve combination body under the actual underground working condition is evaluated.

The invention discloses a motor train unit train body service state detection method and system, and belongs to the technical field of motor train unit detection. The method comprises the following steps: a corrosion state detection stage: positioning a corrosion area, recording a corrosion range and a maximum corrosion depth, and collecting a corrosion product sample; then component testing is conducted on the corrosion product sample, corrosion product components and corrosion types are analyzed, a corrosion mechanism is generated, and a corrosion detection result is obtained; a weld joint dual-detection stage: detecting structural defects or cracks of a target weld joint area through a dye penetrant inspection method, carrying out residual stress test by using ultrasonic waves, and evaluating the use performance of the vehicle to obtain a weld joint detection result; and a fatigue strength and residual life evaluation stage: establishing a vehicle body finite element model under different vehicle conditions according to a corrosion detection result and a welding seam detection result, evaluating the residual life of the vehicle body through static strength and fatigue strength simulation, and generating a vehicle body service state. According to the invention, high-efficiency and comprehensive monitoring and evaluation are realized.

The invention discloses an enameled wire coating uniformity detection device, and relates to the technical field of detection devices.The enameled wire coating uniformity detection device comprises a support mechanism, the top end of the support mechanism is provided with a cleaning mechanism, the top end of the support mechanism is provided with a detection mechanism, and the top end of the support mechanism is provided with a dustproof mechanism; the winding mechanism is arranged at the top end of the support mechanism, the support mechanism comprises a stand column and a workbench, full-process automatic operation is carried out, the cleaning mechanism is of a brush plate and fluff combined structure, impurities on the surface of an enameled wire can be efficiently removed, residues are prevented from affecting the detection result, and the detection mechanism drives an annular pipe type detection head through an electric telescopic rod. According to the enameled wire coating uniformity detection device, the detector and the receiver which are distributed in multiple directions are combined, all-directional and high-precision coating uniformity detection can be carried out on enameled wires, detection parameters are optimized in real time through a feedback mechanism, dust pollution of the external environment is effectively isolated through the design of an openable cover plate and a sealing plate of a dustproof mechanism, and the detection stability is guaranteed.

The present application relates to a kind of GH4706 alloy long time heat exposure organizational performance evaluation method, belong to high-temperature alloy performance evaluation technical field, solve the problem of not comprehensive of the performance evaluation of alloy by existing method.The method includes selecting alloy forge piece to carry out long term heat exposure test, obtains its organizational performance data and / or organizational parameter under different temperature and different heat exposure time, forms measured data set;Establish the relationship p=T(lgt+C) / 1000 between time-temperature uniform parameter and heat exposure time and heat exposure temperature, formula is substituted into by experimental data and different C value, calculate p;Through linear fitting, establish the preliminary fitting model between p and organizational performance data and / or organizational parameter;Determine the best C value;Establish the final fitting model between p and organizational performance data and / or organizational parameter;The equivalence of model is verified using p value, and performance is evaluated using final fitting model.The method of the present application is comprehensive to the performance evaluation of alloy.

A system, device, method, and program for acquiring feature data for material composition information based on artificial intelligence are disclosed. The system may include a memory configured to store a first artificial intelligence (AI) model configured to output first feature data for composition information of a material and a second AI model configured to output second feature data for structure information of the material; and a processor configured to learn the first AI model and the second AI model. The processor may be configured to learn the first AI model based on the second feature data for the structure information of the material output by the second AI model, and / or to learn the second AI model based on the first feature data for the composition information of the material output by the first AI model.

The invention relates to the technical field of metal coating detection, in particular to a full-automatic platinum load analysis device which comprises a frame and a through groove transversely formed in the frame in a penetrating mode, and further comprises a metal coating movably arranged in the through groove; the rollers are axially, symmetrically and rotationally mounted in the frame and movably abut against the bottom of the metal coating; the detection platform is movably mounted in the frame and is positioned below the metal coating; the fixed cylinder is fixedly mounted on one side of the frame; the rotating cylinder is rotationally mounted in the fixed cylinder; the notches are formed in the outer side of the rotating cylinder in an annular array mode, and the number of the notches is multiple; and the moving frame is movably mounted in the notch. According to the full-automatic platinum load analysis device provided by the invention, the beating assembly can beat and clean the bristle part of the brush plate through reciprocating swing of the beating plate, so that the cleanliness of the brush plate is ensured, and the cleaning quality of a metal coating is further improved.

The method for generating a steel sheet material prediction model according to the present application is a method for generating a steel sheet material prediction model in a steel sheet cooling device, the steel sheet cooling device including a water cooling device that cools a steel sheet by spraying cooling water on the heated steel sheet, and a temperature measuring device that measures the surface temperature of the steel sheet during cooling, wherein the method for generating a steel sheet material prediction model includes the step of generating a steel sheet material prediction model after the steel sheet passes through the cooling device by machine learning using a plurality of learning data sets that include, as input performance data, surface temperature information data sets including measured data of the surface temperature at a reference point set in advance on the steel sheet and measured data of the surface temperature at a reference point set based on the reference point, and, as output performance data, material information of the steel sheet after passing through the cooling device at a position corresponding to the reference point on the steel sheet corresponding to the input performance data.

Provided is a computer-implemented method for predicting a pharmacokinetic feature for a drug administered to a subject, such as maximum concentration or time to maximum concentration. The method includes: contacting a fluid of the subject with an electrochemical aptamer-based sensor capable of detecting the drug, receiving a series of output values of the electrochemical aptamer-based sensor over a period of time, and using the series of output values to predict the pharmacokinetic feature.

The invention relates to a method (29) and an apparatus (1) for classifying a metal powder (2). The aim of the invention of improving a characterization and classification of the metal powder (2) is achieved by means of an apparatus (1) which comprises: - an illumination unit (8) for illuminating the metal powder (2), the illumination unit (8) having a plurality of illuminants (10) located around the metal powder (2) so that the metal powder (2) can be illuminated from various horizontal angles and with various light wavelengths; - an image-capturing unit (9) for capturing image data relating to the metal powder (2) illuminated by the illumination unit (8) from the various horizontal angles and the various light wavelengths; and - a processing device (13) for processing the image data, the processing device (13) being operatively connected to the image-capturing unit (9) for signal communication, so that the processing device (13) can classify the metal powder (2) on the basis of the image data transmitted by the image-capturing unit (9).

The utility model relates to the technical field of reinforcing steel bar detection, in particular to a building reinforcing steel bar nondestructive testing device which comprises a base, two groups of fixing blocks are arranged on the base at intervals, a clamping block is arranged above the fixing blocks, an electric push rod is fixedly arranged on one side of the fixing blocks on the base, and a counter bore matched with the electric push rod is formed in the clamping block. An output shaft of the electric push rod is fixedly connected with the clamping block, a first groove and a second groove are formed in the fixing block and the clamping block respectively, a first rotating roller and a second rotating roller are rotationally arranged in the first groove and the second groove respectively, a supporting frame is fixedly arranged on the base, and a scanner is arranged at the bottom of the supporting frame. In the device, a worker places a to-be-detected reinforcing steel bar on two groups of fixing blocks, then drives a clamping block to clamp the reinforcing steel bar through an electric push rod, and then drives two groups of rotating rollers to rotate through a motor, so that the reinforcing steel bar can be driven to move, the operation is convenient, different sections of the reinforcing steel bar are detected, and the detection efficiency is improved. And the detection efficiency is improved.

The invention relates to the technical field of performance detection of coated steel plates, in particular to a method and a system for rapidly detecting weather resistance of a color-coated plate. According to the invention, a multi-factor coupling simulation test scheme is adopted, so that the weather resistance of the color-coated sheet is accurately detected under the multi-factor synergistic effect, the performance abnormal conditions such as coating peeling, blistering, depainting, rusting and the like possibly occurring in the use process of the color-coated sheet can be found in time, and unqualified products are prevented from entering users; according to the method, an evaluation method combining pre-evaluation and cyclic reinspection is adopted, qualified pre-evaluation is carried out on the treated sample piece through adhesive tape testing and appearance observation, color-coated products which do not meet requirements can be rapidly screened, the detection time is greatly shortened, the detection efficiency is improved, cyclic reinspection is combined with multiple environmental factors, and the detection efficiency is improved. The accuracy of the evaluation structure is further ensured, a reliable basis is provided for production and application of the color-coated sheet, and the method is simple in overall operation, high in practicability, wide in application prospect and easy to popularize.

The invention discloses preparation and application of a lithium-aluminum-magnesium alloy material with low self-corrosion efficiency. The preparation method comprises the following steps: (1) mixing an aluminum ingot, a magnesium ingot, an Al-10Fe alloy ingot and an Al-20Li alloy ingot, and smelting at high temperature to obtain alloy liquid; (2) adding sulfur powder, and uniformly stirring to obtain a melt; and (3) after casting, quenching to obtain an Al-2Li-4Mg alloy material, wherein the lithium-aluminum-magnesium alloy material comprises the following components in percentage by mass: 92.89% of Al, 4.68% of Mg, 2.04% of Li, 0.38% of Fe and 0.01% of Si. And (4) carrying out microstructure characterization, hydrogen evolution and electrochemical testing and aluminum air battery testing, and evaluating the electrochemical performance of the Al-2Li-4Mg alloy material. The lithium-aluminum-magnesium alloy material serves as an anode, the self-corrosion rate is remarkably reduced, the anode efficiency is improved to 90% from 71%, and the discharge performance is optimized by adjusting the form and distribution of the second phase Al3Fe in the bulk phase.

This invention relates to the field of enameled aluminum wire testing technology and discloses a device for testing the elongation rate of the coating after aging of enameled aluminum wire. The device includes a base and a frame fixedly mounted on the top surface of the base. A test plate is slidably mounted on the inner wall of the frame. Tooling fixtures are provided on both the inner top surface of the frame and the top surface of the test plate. A drive structure for driving the test plate is provided on the frame. Two mounting seats are symmetrically fixedly mounted on the inner top surface of the frame. This invention achieves precise adjustment of the mounting plate height through a threaded transmission structure of a threaded sleeve and an adjusting screw. Combined with the slot limiting during the movement of the rotating sleeve, it ensures that the mounting plate always corresponds to the center position of the tooling fixture during feeding. Simultaneously, the gravity traction of the counterweight and the magnetic drive of the centering component automatically center and align the enameled aluminum wire sample, avoiding premature core wire breakage due to clamping misalignment or clamping distance deviation, reducing test data errors, and accurately reflecting the actual elongation rate of the coating after aging.