2844 results about "Magnesium alloy" patented technology

The invention provides an automobile magnesium alloy pre-twin crystal deformation data analysis system, and relates to the technical field of data processing, and the system comprises a twin crystal correction module which is provided with a first target monitoring point and a second target monitoring point in a pre-twin crystal area, the first target monitoring point is located at a crystal boundary intersection, and the second target monitoring point is located at the center of a twin crystal zone; acquiring orientation difference angle and strain energy density difference data of the two monitoring points in real time, calculating a covariance matrix of change characteristics of the two monitoring points, and correcting a proliferation rate parameter and an orientation rotation parameter in the dynamic evolution matrix according to a correlation coefficient of the covariance matrix to obtain a corrected dynamic evolution matrix; and the optimization module is used for adjusting a hot extrusion process parameter group according to the twin crystal density gradient distribution output by the corrected dynamic evolution matrix, the parameter group comprises a mold temperature, an extrusion speed and a strain path, and the twin crystal density is dynamically controlled in a target interval. According to the invention, the complex stress state of the automobile part under the actual working condition can be accurately simulated.

The invention discloses a semi-solid injection-molded high-strength corrosion-resistant magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 7%-8.5% of Al, 1%-4% of Zn, 0.1%-0.8% of RE, 0.02%-0.5% of Ca and the balance of Mg and inevitable impurities. Through component design and process optimization, the liquidus temperature of the alloy is lower than 610 DEG C, and the alloy is insensitive to temperature in the solid fraction interval of 20-40% and is suitable for semi-solid injection molding; the Al content is controlled to form a net-shaped Mg17Al12 phase as a corrosion barrier, and Zn and RE / Ca cooperate to achieve heat treatment strengthening and oxidation film densification. The problem that strength and corrosion resistance of a traditional magnesium alloy are difficult to consider at the same time is solved, and the magnesium alloy is suitable for high-performance light-weight components of automobiles, aerospace and the like.

The invention relates to the technical field of alloy pouring processes, in particular to a magnesium alloy heterogeneous flow overall coordination pouring process which comprises the steps of conducting pouring numerical simulation through simulation software, optimizing pouring design and determining a composite flow guide structure, a mold temperature control scheme and an alloy component regulation and control strategy. Magnesium alloy smelting and refining are conducted; preheating the mold by using an intelligent temperature control system; during the period, the intelligent temperature control system monitors and adjusts the temperature of the mold, and the online alloy adding system and the impurity adsorption filtering device keep the components of the melt uniform and pure; and after pouring is completed, controlling the mold temperature according to a preset cooling curve to slowly and uniformly solidify the melt. The design of the bionic branch-shaped flow dividing structure, the dynamic adjustable flow guide plate and the like reduces casting defects, and the casting forming quality is improved. And on-line alloy adding and impurity adsorption filtering ensure that melt components are stable, and the casting performance is improved.

The invention provides a magnesium alloy electric drive main shell mold machining precision control method and system, and belongs to the field of precision numerical control machining. The method comprises the steps that dynamic milling force, key point temperature and position signals of all shafts are synchronously collected through a multi-source sensor; a recursive least square method is adopted to identify the dynamic rigidity and damping coefficient of the tool-workpiece system on line, and the thermal deformation drift distance is calculated in combination with a temperature signal; predicting a three-dimensional deformation error vector in real time based on the dynamic model, thermal deformation and geometric errors, and constructing a space compensation field; macro motion compensation is achieved by modifying numerical control program coordinate points, and meanwhile high-frequency micro-amplitude compensation is conducted through a spindle tail end fast tool servo system. And establishing an adaptive disturbance observer to perform online estimation on unmodeled disturbance and feed-forward compensation, and realizing online self-tuning of model parameters in combination with in-situ measurement feedback. Real-time sensing, full-band dynamic compensation and closed-loop self-adaptive control of multi-source errors are achieved, and the machining precision and long-term stability of the mold are remarkably improved.

The invention provides a novel magnesium alloy refining control system which comprises the steps that according to melt velocity field and concentration field data, a real-time data set is combined, melt state feature vectors are extracted, and an initial state feature set is generated and used for follow-up prediction and optimization processing; aiming at different sensor sampling frequencies and data formats, applying a timestamp aligned multi-source data synchronization algorithm, fusing the real-time data sets, and generating a fused data set with a unified format; according to the fusion data set and the initial state feature set, applying a long short-term memory network time sequence prediction algorithm to generate future change trend data of melt component distribution and flow state; and according to the change trend data and the initial state feature set, a refining parameter optimization model based on gradient descent is constructed, an optimized refining process parameter set is generated, and the melt state is adjusted.

The invention discloses a multi-element low-alloying high-speed extrusion flame-retardant magnesium alloy and a preparation method thereof. The alloy comprises the following components in percentage by mass: 0.5 to 2.0 percent of Al, 0.2 to 1.0 percent of Zn, 0.1 to 1.0 percent of Mn, 0.2 to 0.8 percent of Ca, 0.2 to 1.0 percent of heavy rare earth element Y, Er or Gd and the balance of Mg and inevitable impurities. Through the synergistic effect of non-rare earth elements Al, Zn, Mn and Ca and trace heavy rare earth elements, matching of low cost, good mechanical property and flame retardant property is realized. After the alloy is subjected to optimized bipolar homogenization heat treatment, the alloy can be subjected to extrusion production at the extrusion rate of 10-30 m / min. The room-temperature ultimate tensile strength is larger than or equal to 270 MPa, the yield strength is larger than or equal to 240 MPa, the ductility is larger than or equal to 12%, and the ignition point is larger than or equal to 850 DEG C. Important support is provided for propelling the magnesium alloy extrusion material to achieve equipment lightweight and low-carbon manufacturing in the fields of rail transit, aerospace and the like.

The invention relates to the technical field of material testing, and discloses aluminum magnesium alloy wire strength detection equipment which comprises a base and a controller, the top of the base is provided with a fixed seat, the base is provided with a movable seat through a first telescopic part, and a tension sensor is arranged between the first telescopic part and the movable seat; clamping mechanisms and locking mechanisms are arranged at the tops of the movable seat and the fixed seat and are used for clamping and fixing the two ends of the alloy wire; an environment simulation mechanism is arranged at the top of the base and is used for simulating different environment conditions of the alloy wire during detection; the environment simulation mechanism is arranged, the temperature and humidity in the sealing cover can be accurately adjusted, the experiment environment is adjusted in real time through a temperature adjusting instrument and a humidity adjusting instrument, different environment conditions are simulated, and therefore the mechanical performance of the alloy wire under various temperature and humidity conditions is evaluated; and the accuracy and comprehensiveness of a detection result are ensured.

The invention discloses a magnesium air battery negative electrode component design method based on interpretable machine learning and a preparation method, and relates to the technical field of magnesium air batteries. The method aims at designing magnesium alloy components capable of improving discharge voltage and negative electrode efficiency at the same time by using an explanatory machine learning model, particularly adopting a light-weight gradient elevator algorithm (LightGBM) model and explainable analysis and combining multi-objective optimization. According to the method, the feature importance of magnesium alloy components is analyzed based on a machine learning model, the Mg-0. 5Zn-1. 5Ga component is preferably selected for contributions of Al, Zn, Ca, Ga, In and other elements to the discharge voltage and the negative electrode efficiency, and compared with a high-purity magnesium negative electrode material, the negative electrode efficiency and the discharge voltage of the magnesium alloy negative electrode material are both improved. The invention further relates to a smelting preparation method of the magnesium alloy negative electrode material, and the method is simple and easy to operate.

The invention discloses a porous ceramic filter for liquid magnesium alloy purification and a preparation method thereof, and the porous ceramic filter comprises the following raw materials in percentage by mass: 70-85wt% of ceramic particles, 8-15wt% of multi-element oxide system microcrystalline glass brazing filler metal and the balance of a binder, al2O3-B2O3-SiO2-MgO-CaO multi-element oxide system microcrystalline glass brazing filler metal is adopted, under the condition of air atmosphere high-temperature calcination, a compact reaction layer containing a low-melting-point glass phase, an aluminum oxide phase, a magnesium aluminate spinel phase, a calcium aluminosilicate phase, a borate phase and a silicate phase is generated on the surfaces of ceramic particles of a porous ceramic filter through a chemical reaction; the magnesium alloy filter has high strength and good high-temperature stability, and the problems that the filter loses efficacy and magnesium alloy melt is polluted due to the fact that the filter is eroded by magnesium alloy liquid are effectively solved.

The invention relates to the technical field of magnesium alloys, in particular to a high-toughness rare earth-containing magnesium alloy and a preparation method thereof.The high-toughness rare earth-containing magnesium alloy is prepared from, by weight, 3-8 parts of Zn, 1-5 parts of RE, 0.5-3 parts of Al, 0.1-1 part of Mn, 0.05-0.3 part of Zr and the balance Mg; rE is a combination of Y, Nd and La in a mass ratio of (2-3): 1: (0.5-1). Zinc is used as a secondary main element to replace part of aluminum, efficient solid solution strengthening is achieved through high solid solubility of zinc in magnesium, meanwhile, the morphology and distribution of a precipitated phase are regulated through rare earth, a beta-MgZn2 phase is formed, the high-temperature stability is better, balance optimization of strength, toughness and corrosion resistance is achieved, meanwhile, the welding performance of the alloy is improved through combination of Y, Nd, La and Zr, and the welding performance of the alloy is improved. The hot crack tendency is reduced, the brittle phase problem of a traditional high aluminum alloy is avoided, and the corrosion resistance and the machining performance are synergistically improved.

The invention discloses an electric arc additive manufacturing method universal for ZM series magnesium alloys, which comprises the following steps of: 1, carrying out high-precision digital modeling, carrying out refined model subdivision according to geometrical characteristics of a workpiece, and carrying out targeted path planning according to a subdivision result; 2, preheating the magnesium alloy substrate, and introducing inert protective gas; 3, fixing the ZM-series magnesium alloy coiled wire in wire feeding equipment; fourthly, electric arc additive manufacturing parameters are input; 5, electric arc additive manufacturing; and sixthly, air cooling is conducted till the room temperature is reached, and the ZM-series magnesium alloy workpiece is obtained. The novel ZM magnesium alloy preparation method, namely the electric arc additive manufacturing method universal for the ZM magnesium alloy, is provided by considering the defects that the ZM magnesium alloy usually has many casting defects, low strength and the like, and according to the method, a magnesium alloy base plate is treated, and electric arc additive manufacturing parameters are controlled; the ZM-series magnesium alloy is prevented from common casting defects such as looseness and shrinkage cavities, the microstructure is fine and uniform, and the good mechanical property is achieved.

The invention provides an Al-Si series die-casting aluminum alloy based on secondary aluminum, a preparation method of the Al-Si series die-casting aluminum alloy and a structural part. The method comprises the following steps: adding industrial silicon, steel scrap and Ni into a secondary aluminum melt to obtain a mixed melt; carrying out boronizing treatment and primary refining treatment on the mixed melt; the temperature is adjusted to 710-780 DEG C, magnesium alloy waste, Sr and Al-Ti-B alloy are added, and then secondary refining treatment is conducted; and the mixed melt is subjected to die-casting treatment, and the Al-Si series die-casting aluminum alloy based on the secondary aluminum is obtained. The high-strength aluminum alloy material comprises the following components in percentage by mass: 6%-12% of Si, 0.1%-1% of Fe, 0.4%-3% of Mg, 0%-0.1% of Sr, 0%-0.3% of Ti, 0%-0.05% of B and 0%-2.5% of Ni.

The invention belongs to the technical field of material processing, and discloses a magnesium alloy casting semi-solid injection molding method and application, and the method comprises the following steps: checking and adjusting a semi-solid injection machine, a casting mold and other equipment to be in a normal state, and placing magnesium alloy particles in a designated area of a hopper; putting a long nozzle of the semi-solid injection platform into the center of a mold sprue; setting the temperature of each section of a mold temperature controller, a charging barrel and a nozzle; preserving heat for a period of time after the temperature of the charging barrel reaches a set value, so that the temperature of materials in the charging barrel is uniform; setting the injection rate, the cooling time, the material return distance and the melt pressure of the semi-solid injection machine; and after a release agent is quantitatively sprayed to the mold, a semi-solid injection program is started, and a casting is obtained. The AS41B magnesium alloy particles with good heat resistance are adopted as the raw material, the semi-solid injection molding method is combined, a melting furnace is not needed, only heating to the semi-solid state is needed, the melt temperature is low, energy is saved, the service life of a mold is prolonged, protective gas is not needed, and the manufactured casting is good in mechanical property and high in heat resistance.

The invention provides a flame-retardant magnesium alloy with efficient forming diversification and a preparation method of the flame-retardant magnesium alloy. The flame-retardant magnesium alloy comprises the following components in percentage by mass: 4.0-10.0% of Al, 0.2-1.6% of Ca, 0.01-0.5% of Mn, 0.1-1.5% of RE, less than or equal to 0.05% of inevitable impurities and the balance of Mg, and the added RE is one or any combination of Ce, Sm, La and Sr. The preparation method comprises the following steps: smelting and casting, granulating and pulping, and performing pressure injection molding. According to the preparation method, diversified efficient forming of complex curved surfaces, thin-wall parts, special-shaped components and the like can be achieved through cooperative regulation and control of components, the process and the structure, and the obtained flame-retardant magnesium alloy is compact in structure, has the multi-level structural characteristics including a spherical primary solid phase, a fine solidification secondary phase and a grain boundary net-shaped eutectic phase and meanwhile has good flame retardance and mechanical performance; the ignition point is 750-1200 DEG C, the yield strength is 130-200 MPa, the tensile strength is 230-300 MPa, the ductility is 5-20%, and the aluminum alloy is suitable for industrial production.

The invention discloses an electric arc additive manufacturing conformal temperature regulation and control device and method, belongs to the technical field of metal additive manufacturing, and aims to solve the problems of poor molten pool stability, low dimensional precision, serious heat accumulation and the like caused by temperature difference in the electric arc additive manufacturing process. The regulation and control device comprises a cooling device, a heating device, a temperature sensor, a temperature regulation and feedback device and a sliding rail which are assembled through the sliding rail and can keep synchronous movement. In the printing process, the heating device preheats the pre-walking track to enable the pre-walking track to reach a proper printing temperature; the cooling device is used for cooling the formed welding bead in real time; the temperature sensor collects the printing temperature in real time and feeds the printing temperature back to the temperature regulation feedback device, and precise temperature regulation and control are achieved. The method is suitable for additive manufacturing of multiple metal materials such as austenitic stainless steel, martensitic stainless steel and aluminum magnesium alloy, the forming efficiency, the size precision and the forming quality are remarkably improved, and the rejection rate is reduced.

The invention discloses a magnesium alloy hydrogel composite scaffold, which comprises a magnesium alloy scaffold having a porous structure; the surface of the hydrogel cartilage layer is in contact with the magnesium alloy stent, and the hydrogel cartilage layer comprises methacrylated gelatin hydrogel, methacrylated hyaluronic acid hydrogel and methacrylated chitosan hydrogel. The formula of the cartilage layer simulates the components of normal transparent cartilage; and the Young modulus of the hydrogel is further improved by virtue of a unique soft and hard combined structure, and is improved by about 3 times so as to meet the mechanical strength of normal physiological cartilage. The fatigue resistance of the hydrogel is also improved due to the particularity of hardness and softness combination. And the magnesium alloy is combined with the hydrogel, so that electrochemical combination is further formed, and the magnesium alloy and the hydrogel are combined more tightly.

The invention discloses a high-rigidity Mg-Al series magnesium alloy material which comprises main alloy elements Al and Ca, the content of Ca is 15 wt.%-30 wt.%, and the mass ratio of Ca to Al is 0.4-1. Preferably, the content of Ca is 15.5 wt.%-27 wt.%, and the total content of Al and Ca is greater than or equal to 31 wt.%. By regulating and controlling the Ca content and the Ca / Al mass ratio, a high-modulus C36 or C15 phase is formed to the maximum extent, and plasticity is kept while the elasticity modulus is improved. The magnesium alloy material is high in elasticity modulus, high in rigidity and good in heat resistance, and can be applied to service scenes with higher requirements for material light weight, rigidity, dimensional stability and wear resistance.

The invention discloses a rare earth alloy and a method for improving the fatigue performance of heavy rail steel through magnesium metallurgical treatment, the rare earth alloy is La or Ce rare earth alloy, and the content of rare earth simple substances in the rare earth alloy is 10%-30%; magnesium alloy or a magnesium wire is added in the magnesium metallurgical treatment, and the magnesium alloy or the magnesium wire is added to ensure that the yield of the magnesium element in the heavy rail steel is larger than or equal to 10%; a component system of the heavy rail steel produced through the rare earth and magnesium metallurgical treatment is not changed, and the properties of inclusions in the heavy rail steel are changed through the rare earth and magnesium metallurgical treatment, so that the inclusions are fined and dispersed; the La or Ce rare earth alloy and the magnesium alloy or the magnesium wire are added after vacuum degassing and before bloom continuous casting. Through modification treatment, the inclusions in the heavy rail steel are denatured and float upwards, the level of the inclusions in the steel is reduced, meanwhile, the inclusions remaining in the steel are refined and dispersed, and therefore the purposes of improving the metallurgical quality of the heavy rail steel and improving the comprehensive mechanical property of the heavy rail steel are achieved.

The invention discloses a preparation method of a low-cost high-performance large-diameter forged grinding ball, and belongs to the technical field of grinding balls. The method comprises the following steps: taking Q235 scrap steel and waste high manganese steel ZG120Mn13 as main raw materials, adding a small amount of ferroboron, aluminum-magnesium alloy, ferrotitanium and a carburant, smelting molten steel by adopting an electric furnace, continuously casting to form a steel billet, rolling and forging the steel billet, and optimizing a heat treatment process to obtain the low-cost high-performance large-diameter forged grinding ball. The wear-resistant grinding ball has the characteristics of high strength, high hardness, high wear resistance and impact resistance, the surface hardness of the wear-resistant grinding ball can reach 61-63 HRC, the hardness distribution is uniform, the internal and external hardness difference is small, and the defects of quenching soft spots and the like are avoided. The wear-resistant grinding ball is high in tensile strength and free of out-of-round in use, is used for grinding iron ore, reduces the ball consumption per ton of ore by more than 25% compared with a common forged wear-resistant steel ball under the same working condition, has excellent wear resistance, and has good economic and social benefits in popularization and application.

The invention provides a method for improving the high-temperature crack resistance of a cupronickel alloy based on addition of an alterant, which comprises the following steps: S1, heating a cupronickel alloy raw material until the cupronickel alloy raw material is completely molten; s2, scum in the metal solution is fished out; s3, adding a copper-magnesium alloy; s4, adding pure titanium, and fully melting and reacting the pure titanium through stirring; s5, scum in the metal solution is fished out; s6, casting after the furnace front analysis is qualified; s7, obtaining a cupronickel alloy round ingot or flat ingot; the copper-magnesium alloy is added as a deoxidizing agent, so that the oxygen content of a metal solution can be reduced, oxygen is prevented from reacting with alloy elements to generate inclusions, the purity of the alloy is improved, and the crack resistance of the alloy is enhanced; the fine and uniform grain structure can effectively improve the high-temperature plasticity of the cupronickel alloy, reduce grain boundary defects, improve the high-temperature crack resistance of the cupronickel alloy and avoid cracking under high-temperature forging or hot rolling.

The invention relates to the technical field of die-casting production and manufacturing of metal parts, in particular to a magnesium alloy die-casting die device. The mold comprises a mold mechanism, the mold mechanism comprises a first mold assembly, a second mold assembly and a feeding mechanism, a plurality of receding openings are formed in the peripheral sides of the first mold assembly and the second mold assembly, liquid pouring gates and cavities are formed in the first mold assembly and the second mold assembly, and the feeding mechanism comprises a feeding barrel and a sprue spreader; when the first mold assembly and the second mold assembly are closed, the mold core is located in the mold cavity; the core pulling assembly comprises a fixing frame connected with the mold core and a driving device connected with the fixing frame; the overflow discharging system comprises an overflow groove, an exhaust channel and an exhaust mechanism; and the pre-jacking mechanism is configured to act on the die-casting metal part during die opening. The technical problems of turbulence air entrapment, shrinkage cavity shrinkage porosity, demolding damage and the like are effectively solved, and the production quality and efficiency of magnesium alloy die-casting parts are improved.

The application relates to a high-strength high-toughness high-heat-resistance Mg-Al-RE series die-casting magnesium alloy and a preparation method thereof, the weight percentage of each component in the alloy is as follows: Al: 4.5-6%; La: 4.5-6%; Mn: 0.2-0.5%; Sn: 0.02-0.1%; Be: 0.002-0.02%; the total amount of other impurities is less than or equal to 0.3%, and the balance is Mg; and the above elements also need to simultaneously satisfy: 0 < Al-(0.7La+2Mn) < 1.2. Compared with traditional die-casting magnesium alloys (such as AZ91D, AM60, AE44 and the like), the alloy has the characteristics of high strength, high toughness and high heat resistance, and the yield strength, elongation and creep performance can exceed those of A380 die-casting aluminum alloy; in addition, the alloy also has good die-casting performance, and greatly expands the application scenarios of the die-casting magnesium alloy.

The invention discloses a high-corrosion-resistance magnesium alloy and a preparation method and application thereof, and belongs to the technical field of magnesium alloys, the high-corrosion-resistance magnesium alloy is based on multi-element rare earth microalloying and dispersed Mg17Al12 phase synergistic regulation, in the high-corrosion-resistance magnesium alloy, a fine dispersed Mg17Al12 second phase is evenly distributed in a whole magnesium matrix, and the high-corrosion-resistance magnesium alloy has the advantages that the high-corrosion-resistance magnesium alloy is obtained; the magnesium alloy has the beneficial effects that the magnesium alloy is good in corrosion resistance, uniform corrosion of a magnesium matrix is promoted, and the micro-galvanic corrosion effect between the Mg17Al12 phase and the magnesium matrix is greatly weakened, so that serious local corrosion of the magnesium alloy in a traditional AZ91 alloy is converted into a uniform corrosion behavior, and the corrosion resistance of the magnesium alloy is greatly improved.

The invention relates to the field of metal material testing, in particular to equipment for testing material performance, which comprises a testing platform, the testing platform is provided with a detection mechanism, a supporting mechanism, an extrusion mechanism and a power mechanism, the extrusion mechanism and the power mechanism are arranged on the supporting mechanism, and the extrusion mechanism comprises an extrusion block and a reversing unit for adjusting the orientation change of the extrusion block. At least one end of the extrusion block is open, the extrusion block is used for shearing and crushing a to-be-tested substrate, and a rotating handle is arranged on the extrusion block; and the power mechanism comprises a shearing driving unit and a pressure driving unit which are used for driving the extrusion block to move. By implementing the scheme, the test efficiency of the magnesium alloy material under various test conditions is improved.

The invention relates to a die-casting magnesium alloy, a preparation method thereof and an automobile structural part. Based on the total weight of the die-casting magnesium alloy, the die-casting magnesium alloy comprises the following components in percentage by weight: 5-7% of Al, 7-12% of La, 0.2-0.4% of Mn, less than 0.3% of impurities and the balance of Mg, wherein the ratio of the content of Al to the content of La is 0.50-0.75. The magnesium alloy which is low in cost, high in strength, heat-resistant and creep-resistant can be provided, and the application of the die-casting magnesium alloy to high-strength heat-resistant parts is expanded.

A metal-free signal cable made of at least 24 carbon rovings twisted together for use in music reproduction as a loudspeaker cable, small signal cable or bridge, which is kept free from external influences by spacers made of electromagnetically practically neutral aluminum-magnesium alloy. Even the highest-quality hi-fi systems sound significantly more energetic, clearer, more accurate, more tangible, and even more "in the room" when using my invention. Transients are much more realistic, the reproduced stage size increases significantly, the sound and positioning of the instruments involved are noticeably improved, and each individual note becomes significantly more subtle, complex, and rich in nuance. Even the smallest sound events become perceptible, which are lost with conventional solutions.

The invention discloses an asymmetric extrusion preparation method for a heterogeneous magnesium alloy composite board with an adjustable layer thickness ratio. The method comprises the steps that an asymmetric extrusion die with an extrusion outlet deviating from the center is designed, and an extrusion deformation section is of a triangular section in the thickness direction and of an isosceles trapezoid section in the width direction; a VK41 magnesium alloy, a ZK61 alloy and pure magnesium are machined into blanks with the thicknesses of A, B and C, the blanks are combined according to the EZP sequence after homogenization treatment, the blanks are heated to 350-400 DEG C, heat preservation is conducted, and the extrusion speed is 1-2 mm / s; extruding by adopting an asymmetric die, and placing pure magnesium on the alpha angle side to obtain a three-layer composite board; and carrying out folding or V-shaped bending test on the processed sample. By regulating and controlling the ratio of A: B: C and the extrusion shrinkage angle, accurately controlling the layer thickness ratio, introducing shear strain to improve the texture, coordinating the tension and compression asymmetry and remarkably improving the bending performance, the process is simple, and the method is suitable for industrial production and is suitable for the fields of aerospace, automobiles and the like.

The invention discloses a laser cleaning method for a magnesium-based foil, and belongs to the technical field of magnesium ion battery manufacturing. According to the laser cleaning method for the magnesium-based foil, the magnesium-based foil is magnesium foil or magnesium alloy foil, and the method comprises the following steps that laser cleaning is conducted on the magnesium-based foil through a laser device, and a laser beam conducts 45-degree cross filling path scanning on the surface of the magnesium-based foil; monitoring a plasma spectral line of laser ablation in real time by using a plasma spectrometer; based on the dynamic change of the magnesium characteristic plasma spectral line intensity, the cleaning parameters of the laser are adjusted; and after cleaning is completed, an oxide layer on the surface of the magnesium-based foil is removed. 45-degree cross filling path scanning is adopted, heat accumulation of a repeated scanning area can be reduced, during 45-degree cross filling, adjacent scanning lines cover in a cross mode, heat distribution is more uniform, heat of the scanning area can be reduced, and therefore the problems of local overheating and negative plate perforation or structural damage caused by too high energy are avoided.

The invention discloses a magnesium alloy electric drive main shell mold wear detection method and system based on machine vision, and belongs to the technical field of mold predictive maintenance. According to the method, three-dimensional point cloud, a surface texture image and an infrared thermogram of a mold are synchronously collected, and point cloud data fused with multi-modal information is generated through multi-sensor joint calibration and high-precision registration; geometric, texture and thermodynamic features are extracted and fused from the features, and a cross-modal feature vector is constructed; intelligent judgment of the wear level of the mold and accurate prediction of the remaining service life are achieved through the trained LightGBM ensemble classification model and the long-short-term memory network time sequence regression model; and finally, associating and visualizing the evaluation result and the three-dimensional model, and automatically generating a structured detection report. According to the method, comprehensive quantification, intelligent evaluation and accurate prediction of mold wear are realized, and the detection efficiency and the scientificity of maintenance decision are remarkably improved.

The invention relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method of the high-temperature-resistant flux-cored wire. The high-temperature-resistant flux-cored wire containing the rare earth elements comprises a welding wire skin and a flux core. The flux core comprises the following raw materials of dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, ferro-aluminum, potassium cryolite, potassium titanate, sodium titanate, fine iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, nitrided ferrochrome, bismuth oxide, auxiliaries and the balance reduced iron powder. The auxiliary agent is a mixture of a zirconium-iron alloy, a titanium-iron alloy and an aluminum-magnesium alloy. A specific alloy auxiliary is introduced into the flux core to protect stable transition of rare earth yttrium, yttrium and multiple components synergistically optimize the weld joint performance, 253MA heat-resistant steel is matched, slag and electric arc regulation and control components and a reasonable process are matched, and the welding quality of the welding wire is improved.