824 results about "Surface oxidation" patented technology

The invention provides a method for automatically measuring the thickness of an oxide layer on the surface of an aluminum profile, and the method comprises the steps: scanning a hanging tool contact region on the surface of the aluminum profile, obtaining an aluminum profile surface image, carrying out the edge contour recognition of the aluminum profile surface image, determining the coordinate position of a hanging tool contact point, and obtaining a contact point region range; dynamically adjusting a measurement probe avoidance path according to the boundary coordinates of the uncertain measurement area, generating a measurement track bypassing the uncertain measurement area, and determining a compensation measurement point position sequence according to the boundary of the effective measurement area and the uncertain measurement area; the measuring probe is guided to execute thickness scanning in the effective measuring area through the compensation measuring point position sequence, the oxide layer thickness value of each measuring point is obtained through scanning, and an oxide layer thickness data set is formed; and generating a final oxide layer thickness evaluation report according to the corrected thickness value and the effective measurement area range, and fusing the boundary coordinates of the uncertain measurement area and the oxide layer thickness distribution characteristics to determine the surface oxide layer thickness of the aluminum profile.

The invention relates to the field of battery materials, in particular to a preparation method and application of a high-rate silicon-carbon negative electrode material. The preparation method of the high-rate silicon-carbon negative electrode material comprises the steps of silicon powder pretreatment, silicon-carbon powder composite ball milling, phosphoric acid treatment, high-temperature carbonization and the like. The preparation method of the high-magnification silicon-carbon negative electrode material is simple in process and high in success rate, the cycle stability of a negative electrode is effectively improved, the silicon-carbon negative electrode material has the characteristics of low expansion volume and long cycle life, the phenomenon that a surface oxide layer hinders lithium ion diffusion is avoided, and the service life of the silicon-carbon negative electrode material is prolonged. The comprehensive performance requirement of the existing lithium ion battery on the negative electrode material is met, and the application potential is very wide.

The invention relates to the field of composite material ultrathin laminated plates, in particular to a preparation method of a SiC fiber reinforced Ti-based composite material ultrathin laminated plate. The method comprises the following steps: plating Ti alloy on the surface of SiC fiber by using a physical vapor deposition method; the titanium alloy foil is subjected to acid pickling to remove a surface oxide layer and impurities; the plated fibers are tightly arranged to form a SiCf / Ti alloy plate, the upper surface and the lower surface of the SiCf / Ti alloy plate are bonded to a titanium alloy foil through an adhesive, and a foil-plate-foil prefabricated body is manufactured; sealing the periphery of the prefabricated body, covering gaskets on the upper surface and the lower surface of the prefabricated body, removing the adhesive from the prefabricated body, and placing the prefabricated body in a vacuum hot-pressing mold; and a hot-pressing process is adopted to realize densification composite molding of the laminated plate. According to the method, uniform distribution of SiC fibers is achieved, the mechanical property of the material is effectively improved, the surface flatness is good after the laminated plate is prepared, and the method is suitable for weight reduction application of aerospace structural parts such as skins and reinforcing ribs.

The invention discloses a novel tin-plated copper-clad aluminum alloy wire coating process and a preparation method, and the novel tin-plated copper-clad aluminum alloy wire coating process comprises the following steps: rolling an aluminum alloy material into an aluminum alloy rod through a continuous casting and rolling process in a smelting process; removing an oxide layer on the surface of the aluminum alloy rod; the surface of the aluminum alloy rod with the surface oxide layer removed is coated with a copper strip; drawing and exhausting after coating the copper strip to form a copper-coated aluminum alloy wire blank; the copper-clad aluminum alloy wire blank is subjected to drawing, medium wire drawing, fine wire drawing and annealing treatment to form a copper-clad aluminum alloy wire; and the copper-clad aluminum alloy wire enters a tinning machine and is coated with a tinning layer on the surface to form the tinned copper-clad aluminum alloy wire. The core wire of the tin-plated copper-clad aluminum alloy wire is the copper-clad aluminum alloy wire, the outer layer of the copper-clad aluminum alloy wire is copper, the interior of the copper-clad aluminum alloy wire is made of a high-strength and high-conductivity aluminum alloy material, and the mechanical property and the electrical property of the tin-plated copper-clad aluminum alloy wire are superior to those of a copper-clad aluminum wire, a copper-clad aluminum alloy wire and an aluminum-magnesium wire which are used at present.

The invention relates to the technical field of image data processing, in particular to an aluminum material surface oxidation film defect detection method and system. The method comprises the steps that surface images of the surface of the aluminum material at multiple angles are collected through a preset rotary shooting device; constructing a gray difference feature vector of each pixel point according to spatial direction vectors and gray value difference features of each pixel point and neighborhood pixel points in the surface image; acquiring matched pixel points of the pixel points at different angles by utilizing a pixel point matching relationship; determining a reflection characteristic change vector according to the gray difference characteristic vector difference characteristic between the matched pixel points under the adjacent angles; determining a defect probability value of the corresponding physical position point according to the modulus length change characteristic of the reflection characteristic change vector; and marking the pixel points of which the defect probability values are not lower than the abnormal threshold value as abnormal pixel points, clustering the abnormal pixel points to obtain the defect area, and performing grade marking on the defect area in the surface image, thereby improving the defect identification accuracy.

The invention discloses an injection molding aluminum alloy feed and a preparation process thereof, the feed is composed of aluminum alloy powder and a compound binder, and the aluminum alloy powder is composed of Si, Fe, Cu, Mn, Mg, Zn, Cr, Ti, Co and Al; according to the technical scheme, aiming at the technical problems that a brittle phase is easy to form due to high magnesium and silicon content of the 6013 aluminum alloy, the interface bonding force is poor, the sintering shrinkage is difficult to control and the like due to a stable surface oxide film, and through collaborative optimization of a formula and a process, the high-magnesium-silicon-content high-magnesium-silicon-content high-brittleness aluminum alloy is obtained; the feeding and finished product performance is obviously improved; and the prepared aluminum alloy part has the advantages of high sintering density, high hardness, high tensile strength, high elongation and the like, and can meet the manufacturing requirements of high-end fields such as aerospace and traffic transportation on complex precision parts.

The invention discloses a heat treatment process for a high-strength automobile fastener wire rod, and belongs to the field of automobile fastener machining. Comprising the following steps that S1, metal wires are pretreated, and pretreatment comprises ultrasonic cleaning, chemical oil removal and continuous flushing and drying; s2, the metal wire pretreated in the S1 is placed in a heating environment filled with carbon potential control gas and heated to be in a complete austenitizing state, and an online temperature monitoring means is adopted in the period; and S3, high-frequency induction heating is conducted on the metal wire through high-frequency induction heating equipment, and full-section temperature balanced temperature rise is achieved. Through combination of vacuum pretreatment and short-time high-temperature induction heating, surface oxidation and carbon dissipation are effectively reduced, the thickness of a complete decarburized layer and the thickness of a total decarburized layer are remarkably reduced, and the surface strength and fatigue performance of the fastener are improved.

The invention relates to the field of screw forming, and discloses a screw cold heading forming process which is characterized by comprising the following steps: step 1, wire preparation and surface pretreatment: based on the requirement of screw forming on the surface quality of raw materials, a metal wire is treated by adopting a mechanical wiredrawing and chemical phosphating and saponifying composite process, and the surface of the metal wire is treated; surface oxide skin is removed, a lubricating film layer is formed, and the forming flowability and the service life of the die in the subsequent cold heading process are effectively improved. A raw material is subjected to spheroidizing annealing treatment in a continuous spheroidizing annealing furnace, internal pearlite is converted into spherical cementite, the ductility and deformation uniformity of the material are improved, then a continuous wire drawing machine is adopted for multi-stage drawing diameter reduction, a three-stage chemical phosphating-saponification treatment process is matched, a low-friction and high-adhesion lubricating film layer is formed, and the service life of the lubricating film layer is prolonged. And a stable material basis and a lubricating environment are provided for the subsequent cold heading process, so that the problems that the friction resistance generated in the forming process of a screw material is large, and a mold is quickly worn are solved.

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 high-temperature wear-resistant crack-free high-entropy alloy and a preparation method and application thereof, the molecular formula of the alloy is as follows: Fe < 11.9 > Co < 23.8 > Cr < 23.8 > Ni < 35.7 > Nb < 4.8 >, and a Laves phase exists in the microstructure of the alloy. The preparation method comprises the following steps: putting weighed powder into a ball milling tank for ball milling, uniformly mixing the powder, and then drying, sieving and drying for storage; 304L stainless steel is selected as a base material, a sand mill is used for polishing the surface of the base material so as to remove surface oxide skin until a bright surface is exposed, and oil stains on the surface are cleaned; and the dried powder is placed in a powder feeding tank in a laser system, high-purity Ar gas is used for feeding the powder to a round spot laser head for melting and stacking, and the high-temperature wear-resistant crack-free high-entropy alloy without cracks is formed through layer-by-layer continuous deposition. By adding the Nb element, a Laves phase capable of improving the high-temperature performance is formed in a matrix, a high-entropy alloy sample is prepared through the laser directional energy deposition technology, subsequent heat treatment does not need to be conducted on the high-entropy alloy sample, and the deposited alloy has the excellent wear resistance at the high temperature.

The invention relates to the technical field of industrial visual inspection, and particularly discloses a cable copper wire surface oxidation defect online detection system, which is characterized in that multispectral pixel blocks on the surface of a copper wire are extracted through multispectral imaging and image segmentation; using a lightweight convolutional neural network to extract deep spectral-spatial features to obtain an initial feature vector; decomposing the initial feature vector into a defect essential feature component and an environment related feature component which are independent from each other by adopting a feature decoupler; applying a composite loss function including classification loss, decoupling loss and orthogonal constraint loss in the training stage for joint optimization; in the inference stage, classification decision is carried out only according to the intrinsic characteristic components of the defects, and a sorting mechanism is linked to execute rejection operation.

The invention relates to the technical field of laser processing, and discloses a method and system for online removal of steel wire rod oxide scale based on the laser technology, and the method comprises the following steps: establishing a relationship between a release stress and an adhesive force, and determining a relationship between different process parameters and oxide scale removal effects; initial laser process parameters are determined by combining the current material attributes of the wire rod and the performance of the oxide skin; the initial laser process parameters are dynamically adjusted according to the thickness distribution condition of the oxidation layer on the surface of the wire rod; performing laser treatment on the oxide scale on the surface of the wire rod by using a rotary laser head; and detecting the removal effect of the scale on the surface of the wire rod by using an image recognition technology, and dynamically optimizing model parameters according to a detection result. The device can remove scale and stains on the surface of the wire rod in the continuous production process at a time, and the problems that in the prior art, the scale on the surface of the wire rod cannot be completely removed, and the scale on the surface of a workpiece cannot be efficiently treated online are solved.

This invention provides a method for producing small-diameter, thick-walled near-α-type titanium alloy tubing and its application. This method, through the use of cladding and heated rolling, increases the deformation per rolling pass, reduces the number of rolling passes, and results in a finer microstructure and better mechanical properties in the heated-rolled tubing. Simultaneously, the composite material composed of the cladding layer and silica aerogel effectively prevents the alloy rod from contacting air, avoiding further surface oxidation and reducing the thickness of the oxide layer on the rod surface. Furthermore, the composite material forms a "thermal insulation layer" on the surface of the alloy rod, preventing large temperature differences between the surface and core during heated rolling, thus ensuring better microstructure uniformity and surface quality. In this invention, the cladding process expands the selection of heating furnaces and reduces equipment requirements.

The invention discloses a method for preparing a non-polymer coating of a pure magnesium intravascular stent, and relates to the technical field of medical instruments, and the method comprises the following steps: pretreatment: immersing the pure magnesium intravascular stent into a diluted hydrochloric acid solution for ultrasonic cleaning, removing a surface oxidation film and impurities, then washing the pure magnesium intravascular stent with deionized water until the pure magnesium intravascular stent is neutral, and drying the pure magnesium intravascular stent for later use; micro-arc oxidation: taking the pretreated bracket as an anode, taking a stainless steel plate as a cathode, putting the bracket and the stainless steel plate in electrolyte, applying pulse voltage for treatment, and generating a ceramic oxide layer with the thickness of 5-20 microns on the surface of the bracket; and bioactive coating: immersing the stent subjected to micro-arc oxidation into the suspension, and depositing by adopting an electrophoretic deposition method to form a hydroxyapatite coating with the thickness of 1-5 microns. According to the non-polymer coating method for the pure magnesium intravascular stent, no polymer is used in the whole coating process, inflammatory reaction possibly caused by the polymer and degradation products of the polymer is avoided, and the biological safety of the stent is improved.

The invention discloses a chemically enhanced shear thickening polishing solution suitable for a WC-Co alloy and a polishing method, and aims to solve the problem of loss of a Co phase on the surface of the WC-Co alloy in a traditional polishing method. The polishing solution comprises K3 [Fe (CN) 6], KOH, diamond abrasive particles, dispersed phase particles and deionized water, a WC phase and a Co phase of a WC-Co alloy react with [Fe (CN) 6] 3 <-> and OH <-> in the polishing solution respectively, and a soft oxidation film WO3-x and a stable Co3O4 oxidation film are generated on the surface of the alloy. Through the shear thickening effect, the polishing solution forms a particle cluster wrapping the abrasive particles when the relative speed reaches a threshold value, a surface oxidation film is removed through the micro-cutting effect of the diamond abrasive particles, and efficient, high-quality and Co-loss-free WC-Co alloy surface polishing is achieved. The method obviously inhibits the loss of the Co phase at the same time, maintains the hardness and the use performance of the alloy surface, and is especially suitable for precision machining of the hard alloy blade.

The invention provides an automatic production line for collaborative operation of continuous vacuum laser deep penetration welding and workpiece surface oxidation pretreatment, and relates to the technical field of laser welding, the automatic production line comprises a grinding box, a laser processing box is arranged on one side of the grinding box, and inlets and outlets are formed in the two sides of the grinding box and the two sides of the laser processing box; a connecting channel is fixed to an inlet and outlet between the grinding box and the laser processing box, a sending-out channel is fixed to an inlet and outlet in the outer side of the laser processing box, and compared with the prior art, the grinding box communicates with the laser processing box through the connecting channel, and an extending-out plate and a containing plate for clamping plates are arranged in the connecting channel and the sending-out channel; the clamping distance suitable for plates can be adjusted through the conveying assembly, the plates are driven to be intermittently fed into the grinding box and the laser machining box in a clamping traction mode, air in the laser machining box is pumped out in cooperation with the air storage cylinder, the relative vacuum environment is kept, the effect of laser deep penetration welding is prevented from being affected, assembly line machining is achieved, and efficiency is higher.

The invention discloses a method for reducing impurity element sulfur in cast high-temperature alloy return scraps, and belongs to the technical field of metal material smelting. The method comprises the following steps: carrying out vacuum induction melting on pretreated cast high-temperature alloy return scraps of the same mark to obtain a return scrap alloy induction ingot; surface oxide skin of the obtained return scrap alloy induction ingot is removed, a primary shrinkage cavity in the upper end is cut off, then the return scrap alloy induction ingot and an auxiliary electrode are coaxially welded, and a consumable electrode is obtained; and after the consumable electrode is baked, electroslag remelting is conducted under the protective atmosphere, and an electroslag ingot is obtained. On the basis of vacuum induction melting, the protective atmosphere electroslag remelting technology is further adopted for conducting deep purification melting treatment on the return scrap alloy ingot, the content of the impurity element S in the return scrap alloy ingot can be reduced to 0.5 ppm or below, and the content of the impurity element S in the return scrap alloy ingot reaches the level lower than the content of the element S in a new material; and the high-temperature oxidation resistance and corrosion resistance of the alloy can be obviously improved, and the fatigue, durability and other mechanical properties of the alloy are improved.

The invention relates to the technical field of metal machining equipment, in particular to stamping equipment for aluminum alloy precision hardware machining, which comprises a base, a hydraulic cylinder is mounted on the base, a stamping head is fixedly mounted at the output end of the hydraulic cylinder, and a mounting plate fixedly sleeves the output end of the hydraulic cylinder. An upper die is mounted on the mounting plate through a buffer assembly, a through hole is formed in the middle of the upper die, a first cavity is formed in the upper die, a plurality of air outlet holes are formed in the inner wall of the through hole, air collecting boxes are symmetrically and fixedly mounted on the upper surface of the upper die, and air collecting assemblies are arranged in the air collecting boxes. Gas is injected into the gap between the punching head and the through hole of the upper die, heat generated by friction between the punching head and the workpiece is rapidly taken away, mechanical performance reduction of the punching head due to high temperature is avoided, the service life of the punching head is prolonged, and meanwhile dimensional deviation, surface oxidation or deformation of the aluminum alloy workpiece due to uneven heating can be prevented; and the machining precision and the surface quality of the hardware are ensured.

The application belongs to the field of metallurgy and relates to a preparation method of titanium alloy wire, in particular to a bright surface cold drawing preparation method of high-strength titanium alloy wire.The titanium alloy wire is subjected to vacuum heat treatment and surface lubricating treatment, then subjected to multi-group multi-pass bright surface cold drawing process, and finally subjected to surface treatment to obtain titanium alloy wire with target diameter.By controlling pass deformation of 8-20% and heat deformation of 30-50%, the titanium alloy wire is subjected to full-process bright surface cold drawing from φ3.0mm to φ0.2mm, and the drawing speed reaches 15-35m / min.The titanium alloy wire prepared has good metallographic structure, high uniformity, and a yield of more than 80%.For the fine wire from φ0.5mm to φ0.2mm, the bright surface drawing reduces the frequency of the problem that the wire is prone to breakage due to the depression on the surface of the wire caused by the oxide skin on the surface of the wire.

The invention discloses a preparation method of a corrosion-resistant and impact-resistant high manganese steel wear-resistant lining plate, and relates to the technical field of wear-resistant materials, the preparation method comprises the following steps: S1, weighing raw materials according to the mass percentage; s2, raw material smelting; s3, rare earth purification is conducted, specifically, rare earth elements are added into the molten-state raw materials, and the molten-state raw materials are subjected to deoxidation and desulfurization treatment; s4, casting molding is conducted, the temperature from the bottom end of a casting to a riser is controlled to be decreased stage by stage, and directional solidification is achieved; s5, heat treatment is conducted, specifically, the casting is subjected to solution treatment and then subjected to water quenching to the room temperature; and S6, surface treatment is conducted, specifically, shot blasting treatment is adopted, surface oxide skin is removed, and a surface compressive stress layer is formed. The strength, hardness and high toughness of the high-manganese steel are guaranteed by controlling the content of carbon and manganese, meanwhile, single-phase austenite is obtained through solution treatment, the hardness is improved through carbon atom segregation through low-temperature aging, and the strength, hardness, toughness and corrosion resistance of the high-manganese steel lining plate are improved.

The invention discloses a preparation method of a TiAl alloy casting containing return scraps, the TiAl alloy return scraps used in the preparation method are casting sprues, patches and skull which are cut off in subsequent processing, and the preparation method comprises the following specific implementation steps: carrying out ultrasonic cleaning and surface treatment on the return scraps to remove a surface oxide layer; a new material with the target weight of 50% is used for smelting during primary smelting to obtain a primary ingot, a return material is placed below the turned primary ingot before secondary smelting, and then the primary ingot is smelted and poured into a preheated mold to form a casting, so that recycling of a TiAl alloy raw material is realized, the raw material cost is reduced by 50%, the preparation cost is reduced by 33%, and the production efficiency is improved. And the power consumption and the equipment loss are reduced, so that the purposes of energy conservation and emission reduction are achieved. The impurity element control of the cast ingot produced by the method is equivalent to that of alloy produced by conventional raw materials, and is convenient and fast compared with a preparation process by directly utilizing the raw materials. And the poured casting is uniform in component, compact in structure and high in purity.

The invention belongs to the technical field of new material detection, and particularly relates to a new material quality detection device which comprises a detection box, and a controller is fixedly connected to one side wall of the detection box; two movable doors are hinged to the other side wall of the detection box, and four supporting columns are fixedly connected to the bottom of the detection box; a clamping assembly is arranged in the detection box, and an imaging detection mechanism is arranged above the clamping assembly; through cooperation of the infrared LED, the visible light LED and the ultraviolet lamp tube, internal defects of the material are detected through infrared light; detecting surface defects through visible light; surface oxidation or coating uniformity is detected through ultraviolet light; synchronously acquiring multiband images through a high-speed camera; during detection, the rotating cylinder is driven to rotate, and the rotating cylinder drives the connected infrared LED, visible light LED and ultraviolet lamp tube to rotate through the side plates, so that irradiation of different light beams is realized, and a multi-directional new material detection function is realized.

The invention relates to the technical field of laser additive manufacturing, and discloses a laser composite additive manufacturing method for controlling molten pool flow based on pulse laser, which comprises the steps of base material treatment, powder laying, additive manufacturing, remelting, forming and post-treatment. Parameters of pulse laser and ultrasonic vibration are adjusted according to different stages of the molten pool in the material adding stage, so that convection of the molten pool is sufficient, thermal stress in the solidification stage is remarkably relieved, and the flowing speed is more uniform. And meanwhile, a remelting step is also set, and an excessive molten pool is formed on the surface of the front layer, so that the thickness of an oxide layer on the surface of the front layer is reduced, and the bonding strength among the layers is greatly improved.

The invention discloses a TC4 titanium alloy and carbon fiber reinforced composite material laser welding method, and relates to the field of dissimilar material laser welding. The preparation method comprises the following steps: firstly, carrying out surface modification on carbon fibers by using hydrogen peroxide, deepening the surface oxidation depth by microwave radiation, stripping graphene oxide on the outermost surface by ultrasonic treatment, and then carrying out plasma beam treatment impact to increase and enlarge grooves and pores on the surfaces of the carbon fibers, so that active groups and concave-convex structures on the surfaces of the modified carbon fibers after resin is filled and cured; and secondly, a layer of nano nickel is chemically deposited on the surface of the titanium alloy microstructure, permeation and corrosion of the modified carbon nanotubes to the titanium alloy are reduced, then the carbon nanotubes subjected to acid treatment are deposited on the surface layer of the nano nickel through the electrophoretic deposition technology, the interface wetting and spreading capacity is improved, and the residual stress after welding is reduced. The TC4 titanium alloy, the nano nickel deposition layer, the modified carbon nanotube deposition layer and the modified carbon fiber composite material layer are combined and connected through laser welding, so that the high-strength connection effect is achieved.

The invention relates to the field of solar cell manufacturing, and particularly discloses a polishing additive for solving the black core problem in the BC cell pre-rough polishing process and a use method of the polishing additive. 0.1-5% of a defoaming agent; 0.1 to 0.5 percent of pH (Potential of Hydrogen) regulator; and the balance of deionized water. According to the method, the accelerant, the defoaming agent and the pH regulator in a specific ratio are combined, so that the oxidation reaction on the surface of the silicon wafer is more uniform and controllable; the accelerant accelerates formation and dissolution of a surface oxide layer, and generation of black cores is effectively avoided; the synergistic effect of the defoaming agent ensures that bubbles generated by the reaction can be quickly desorbed, the problem of uneven local corrosion caused by bubble retention is prevented, the surface of the polished silicon wafer is completely free of black nuclei, and ideal surface conditions are provided for subsequent processes.

The invention discloses visual inspection equipment for surface oxidation defects of an aluminum alloy section, and belongs to the technical field of section visual inspection. A first connecting rod is pulled through a protruding end on the left side of a deflection seat, so that a right overturning plate rotates anticlockwise and is in contact with a section above, and meanwhile, a second connecting rod is pushed through a protruding end on the right side of the deflection seat; the left side material turning plate can rotate clockwise, the right side material turning plate can turn the profile into the material supporting groove in the left side material turning plate, the profile can fall on the two conveying belts along with the anticlockwise rotation of the deflection base by one circle, the turnover work of 180 degrees on the profile is completed, and the detected surface of the profile faces downwards and makes contact with the conveying belts. When the surface of the aluminum alloy profile is detected, the undetected surface faces upwards, so that the double-surface detection work of the profile is completed, a mechanical arm does not need to be additionally arranged to turn over the panel and then detect the panel again, the profile is prevented from being scratched, the whole detection process is carried out on the same conveying line, and the detection efficiency of the surface of the aluminum alloy profile is further improved.

The invention discloses a preparation method of a bright corrosion-resistant aluminum profile, and relates to the technical field of aluminum profile processing, and the preparation method comprises the following steps: mixing and smelting raw materials, pouring, and homogenizing to form a cast ingot; extruding and performing heat treatment to form an aluminum profile; and carrying out surface treatment to obtain the bright corrosion-resistant aluminum profile. The surface treatment comprises electrolytic oxidation, electrophoretic painting and hole sealing. The rare earth elements play roles in purifying a matrix, refining and modifying and microalloying in the aluminum alloy, the aluminum alloy structure is refined, better compactness and integrity can be shown after oxidation, the protection performance of the aluminum profile is improved, and the corrosion resistance and brightness of the aluminum profile are improved. The aluminum profile is pretreated through anode plasma electrolytic oxidation, and the surface of the aluminum profile is oxidized; and cathode plasma electrolytic deposition is utilized, so that direct contact between the cathode aluminum profile and electrolyte is avoided, pores of the barrier layer are sealed, a more compact oxide layer is obtained, and the brightness and the corrosion resistance are improved.

The invention relates to shot-blasting-free treatment liquid for zinc-based coating hot forming steel, a preparation method and application of the shot-blasting-free treatment liquid, and relates to the technical field of steelmaking. Wherein the shot-blasting-free treatment liquid comprises 95 to 98 parts of a solvent; the composition comprises the following components in parts by weight: 0.2 to 0.3 part of an organic modifier, 1 to 4 parts of an inorganic film-forming agent, 0.1 to 0.4 part of an organic chelating agent, 0.2 to 0.4 part of a stabilizer, and 0.1 to 0.3 part of a surface improving agent. The shot-blasting-free treatment liquid forms a compact and uniform composite protective film on the surface of zinc-based coating steel. The protective film is converted into an inert layer with high-temperature oxidation resistance in the heat treatment process, and contact between oxygen and a zinc coating is effectively blocked, so that oxidation and volatilization of zinc at high temperature are remarkably reduced, the generation amount of ZnO and the loss of zinc element are reduced, the protective effect of the coating in the heat forming process is ensured, and the service life of the coating is prolonged. The product treated by the shot-blasting-free treatment liquid and processed by the hot forming process is clean in surface, controllable in surface oxidation product and free of an additional shot-blasting process.

The invention discloses a modification method for improving oxidation resistance of a high-entropy alloy. The modification method comprises the following steps: S1, carrying out solution treatment and oil cooling on an as-cast high-entropy alloy; s2, the high-entropy alloy subjected to oil cooling is cut, surface oxide skin is removed, and a metal sample is obtained; and S3, the metal sample is subjected to large-deformation cold rolling treatment. According to the method, dendritic structures in the as-cast alloy are eliminated through solution treatment, then the solid-solution-state high-entropy alloy is subjected to multi-pass rolling, the total deformation is 60%-90%, and the oxidation resistance of the high-entropy alloy can be greatly improved. The method is reasonable in design and easy to operate, and the oxidation resistance of the high-entropy alloy is well improved.

The invention relates to a low-cost high-strength corrosion-resistant magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 6-11% of Al, 0.4-0.6% of Zn, 0.2-0.6% of Mn, 0.2-0.4% of Y, 0.2-0.6% of Ca and the balance of Mg and inevitable impurities. A small amount of Ca and Y elements are added, on one hand, an alpha-Mg matrix structure can be refined, beta phase distribution is more uniform, and the mechanical property is improved; and on the other hand, the solid solubility of the alloy element Y in an alpha-Mg matrix can be improved by adding the Ca element, the compactness of a surface oxidation film and a corrosion product film is promoted, compared with other rare earth elements, the potential difference between Al-Ca and Al-Y phases formed by Ca, Y and Al and the magnesium matrix is smaller, micro galvanic corrosion is smaller, and the corrosion resistance of the alloy is remarkably improved.