1221 results about "Alloy surface" patented technology

The invention discloses an aluminum alloy surface defect detection method and system using deep learning, and relates to the related field of detection performed in combination with deep learning, and the method comprises the following steps: carrying out image acquisition on an aluminum alloy finished product, constructing a surface image data set to extract multi-scale surface features, and constructing a feature enhanced image set to carry out defect detection, and a defect detection result is obtained to dynamically optimize aluminum alloy production process parameters, and a process adjustment instruction is generated and fed back to a production system. The technical problems that traditional detection mostly depends on manual visual inspection or a machine vision system based on rules, imaging distortion, small defect missing detection and process adjustment are caused are solved, and the technical effects that deep learning is conducted through the double-branch network, the defect detection efficiency and the production yield are improved, and control over the aluminum alloy manufacturing quality is met are achieved.

The invention provides an aluminum alloy surface oxidation spot defect identification method and device based on machine vision, and relates to the field of intelligent manufacturing and industrial automation, and the method comprises the steps: obtaining an aluminum alloy surface color image, and carrying out the preprocessing of the image, so as to extract a brightness component image; self-adaptive threshold segmentation of local contrast enhancement is carried out on the brightness component image, a defect area binary mask is generated, morphological connected domains are extracted according to the mask, and three basic feature indexes of the area pixel value, the contour Fourier descriptor complexity and the area gray scale standard deviation contrast of each connected domain are calculated; and extracting and marking a connected domain boundary, verifying a boundary closed topological structure, and dynamically generating a curvature-driven self-adaptive sampling point through multi-scale B-spline curvature extreme value detection. Through optical-algorithm-process three-level collaborative innovation, the curved surface reflection false alarm rate is reduced, the pinhole detection rate is increased, and the boundary precision is + / -0.2 pixel.

The invention belongs to the technical field of electroplating process optimization, and particularly discloses a titanium alloy surface electroplating control method which comprises the following steps: dynamically generating a hanger posture configuration scheme based on workpiece three-dimensional contour data acquired in real time; a bubble distribution image and electroplating liquid flow field data are synchronously collected, and a bubble-flow field coupling feature set is generated through multi-modal fusion; performing real-time linkage adjustment on the rotation speed and the swing amplitude of the workpiece according to the coupling feature set; after electroplating is completed, plating thickness, edge integrity and surface defect data are collected, and a multi-source plating data set is formed by combining workpiece position information; historical data and real-time data are integrated to carry out hanger layout adjustment judgment, and hanger spacing dynamic reconstruction optimization is started when adjustment is needed. According to the method, multi-parameter cooperative control and closed-loop quality optimization in the electroplating process are achieved, the uniformity and integrity of a titanium alloy workpiece coating are remarkably improved, and generation of bubble related defects is effectively restrained.

The invention relates to the technical field of aluminum alloy surface detection, and discloses an aluminum alloy surface defect recognition method and system based on image recognition, and the method comprises the steps: carrying out the image collection of an aluminum alloy surface, and obtaining an original image of the aluminum alloy surface; preprocessing the collected original image to obtain a preprocessed image; performing feature extraction on the preprocessed image, and extracting geometric features, texture features and color features of defects; screening the extracted features by adopting a feature selection method based on the combination of a genetic algorithm and a support vector machine to obtain a feature subset; inputting the feature subset into a GNN-GAN model, outputting the type, position and size of a defect according to a defect identification result, and marking and recording the defect; according to the invention, the labor cost and the time cost required by manual detection are reduced, the product rework and the rejection rate caused by missing detection are reduced, and the quality stability of the aluminum alloy product is ensured.

The invention belongs to the technical field of materials, and particularly relates to a modified TB polymer, a preparation method and application of the modified TB polymer in an aluminum alloy surface coating. The prepared modified TB polymer has a structure as shown in a formula I, is used as a flexibilizer component in an aluminum alloy surface coating, can provide a large number of hydrophilic hydroxyl or carboxyl groups which are easily subjected to an activation reaction with a metal surface, and improves the adhesive force of the coating; meanwhile, the group can also improve the dispersity of the filler, so that the coating is more uniform, the stress effect of the coating can be improved, and the coating has better flexibility. In addition, a modified TB polymer is introduced into the coating, so that the prepared coating is green and environment-friendly, excellent in salt fog resistance and chemical corrosion resistance, capable of adapting to a complex marine environment, capable of well protecting metal materials and capable of prolonging the service life of the metal materials. And # imgabs0 # I is adopted.

The invention relates to the field of three-dimensional vision measurement, in particular to an aluminum alloy CNC product defect detection method and system based on structured light scanning. The aluminum alloy CNC product defect detection system based on structured light scanning comprises an image acquisition and analysis module, a self-adaptive illumination control module, a point cloud reconstruction module, a defect detection module and a report generation module. According to the method, through texture direction perception and matrix type light source dynamic angle modulation, and in combination with a light intensity-wavelength self-adaptive scheme of saturated pixel grading, mirror surface glare of the aluminum alloy high-reflection surface is greatly reduced; in cooperation with multi-exposure gray scale weighted fusion, a stripe image which is uniform in contrast and free of overexposure can be obtained in single scanning; in the same scanning time, compared with a fixed illumination scheme, the point cloud integrity rate can be improved, and a more reliable three-dimensional data basis is provided for subsequent defect detection.

The invention provides a biological magnesium alloy micro-arc oxidation coating supercritical hole sealing method based on a thermodynamic sedimentary phase diagram, which comprises the following steps: establishing deposition-dissolution balance of metal ion phosphide and hydroxide of a phosphate conversion film in a supercritical carbon dioxide environment at different pH values to obtain the thermodynamic sedimentary phase diagram; selecting a NaH2PO4 solution according to a thermodynamic sedimentary phase diagram, and adding NaHCO3 to obtain a hole sealing solution; the hole sealing solution is injected into a reaction kettle to be heated, and then a refrigerator is started to convert generated carbon dioxide gas into supercritical carbon dioxide; and the biological magnesium alloy subjected to micro-arc oxidation is placed in the hole sealing solution in the reaction kettle to be pressurized, and holes of the micro-arc oxidation coating on the surface of the biological magnesium alloy are sealed. The invention provides a supercritical hole sealing method for a biological magnesium alloy micro-arc oxidation coating based on a thermodynamic sedimentary phase diagram. And the hole sealing effect is good.

The invention relates to the technical field of welding cleaning agents, in particular to an aluminum alloy welding cleaning agent and a preparation method and application thereof. The aluminum alloy welding cleaning agent comprises the following raw materials in parts by mass: 10-20 parts of organic acid, 1-3 parts of modified silicon dioxide, 0.1-0.5 part of a chelating agent, 1-2 parts of an acidic dispersant, 2-5 parts of a corrosion inhibitor, 1.1-3 parts of a penetrant, 5-10 parts of a defoaming agent and 60-100 parts of water. The cleaning agent is reasonable and scientific in formula, simple to prepare, free of special equipment, high in cleaning capacity, capable of achieving an excellent cleaning effect at low temperature, short in time, good in working efficiency and extremely high in cleaning efficiency on oil stains on metal surfaces, especially aluminum alloy surfaces, and the corrosivity is obviously reduced.

The invention relates to the technical field of metal material treatment, and particularly provides an aluminum alloy surface protective coating and a preparation method thereof. The method comprises the following steps: after a to-be-treated aluminum alloy sample is cleaned and no residual liquid exists, sequentially carrying out solution treatment and aging treatment on the aluminum alloy; and immersing the obtained aluminum alloy sample into a conversion film solution, carrying out deposition treatment, and drying to obtain the aluminum alloy sample with the surface protective coating. By combining solid solution treatment and aging treatment with a conversion film process, the wear resistance of the surface of the aluminum alloy is improved, the aluminum alloy is suitable for a higher friction environment, the adhesive force and corrosion resistance of a film layer are improved through multiple treatments of solid solution, aging and the conversion film, and the service life of the aluminum alloy is prolonged.

The present invention discloses a high-temperature oxidation resistant coating based on self-diffusion of a titanium alloy matrix and a preparation method thereof, belonging to the field of metal or alloy surface treatment, wherein the high entropy alloy coating is AlCoCrFeNiTi, and the high entropy alloy coating has a cubic structure and exists in the form of a single solid solution. The present invention adopts double glow plasma alloying technology, uses an AlCoCrFeNi target as a sputtering source, bombards the target with high-purity argon gas, diffuses TiAl alloy matrix elements outward, and prepares an AlCoCrFeNiTi high entropy alloy coating resistant to high-temperature oxidation on its surface. The high entropy alloy coating prepared by the present invention is resistant to oxidation, has high bonding strength, and has good comprehensive mechanical properties.

The invention provides a resistance spot welding method for aluminum alloy. The resistance spot welding method comprises the following steps that S1, a welding electrode is adopted to apply first pressure to the to-be-welded position of the to-be-welded aluminum alloy; s2, rotating the welding electrode to damage an oxidation film on the surface of the to-be-welded part under the condition that the first pressure is applied; s3, the pressure of the welding electrode is adjusted to be second pressure; and S4, under the second pressure, the welding electrode is used for conducting welding treatment on the to-be-welded aluminum alloy, and the welded aluminum alloy is obtained. In the step S2, the welding electrode is rotated, so that the welding electrode and the surface of the to-be-welded aluminum alloy are in contact sliding, a coating film and an oxide layer on the surface of the to-be-welded aluminum alloy are favorably damaged, and the contact resistance between the welding electrode and the to-be-welded aluminum alloy is favorably reduced. According to the resistance spot welding method, the defects of splashing, cracks, lock holes and incomplete fusion are avoided, and the method is easy to operate and low in cost.

The invention provides a titanium alloy surface antifouling corrosion-resistant coating as well as a preparation method and application thereof. The antifouling and corrosion-resistant coating on the titanium alloy surface is prepared from raw materials including titanium-based composite powder, the titanium-based composite powder comprises titanium alloy powder and copper powder, the content of the titanium alloy powder in the titanium-based composite powder is 93 wt%-97 wt%, and the content of the copper powder in the titanium-based composite powder is 3 wt%-7 wt%. Through introduction of the copper element, the phase composition and microstructure of the alloy can be changed, formation of a beta phase is promoted, the ratio of an alpha phase to the beta phase is changed, the compactness and uniformity of a coating are effectively improved, and the corrosion resistance of the surface of the titanium alloy is remarkably improved. The invention further provides a preparation method and application of the antifouling and corrosion-resistant coating on the titanium alloy surface.

The invention relates to a titanium alloy surface strengthened wear-resistant layer and a preparation method thereof, and belongs to the technical field of wear-resistant coatings. The preparation method comprises the following steps: S1, preparing rare earth zirconate slurry and zirconium oxide slurry; s2, the surface of the titanium alloy is sequentially coated with zirconium oxide slurry, rare earth zirconate slurry and zirconium oxide slurry and dried, and bottom layer zirconium oxide, a rare earth zirconate layer and top layer zirconium oxide are formed on the surface of the titanium alloy; and S3, the dried surface of the titanium alloy is coated with laser scanning, so that the bottom zirconium oxide layer, the rare earth zirconate layer and the top zirconium oxide layer are clad on the surface of the titanium alloy, and the metal-based wear-resistant layer with rare earth zirconate spherical particles distributed in a dispersed mode is formed. The wear-resistant layer is prepared on the surface of the titanium alloy through laser cladding, the problem of poor interface bonding force between the wear-resistant layer and the titanium alloy does not exist, and the wear-resistant layer has wear resistance and enough toughness due to the spherical strengthening phase.

The invention belongs to the technical field of protective coatings, and particularly relates to a titanium alloy surface anti-oxidation coating and a preparation method. The diffusion aluminide coating with the aluminum content gradually reduced from outside to inside is prepared on the surface of the titanium alloy, and the coating is free of penetrating cracks and can contain elements such as Si. Firstly, an aluminum or aluminum alloy coating is pre-deposited on the surface of the titanium alloy, and then the diffusion aluminide coating is prepared through thermal diffusion treatment under vacuum. By adopting the method, not only is the prepared coating free of penetrating cracks, but also the formation of the cracks is inhibited in the thermal cycle process, and the high-temperature oxidation resistance of the coating is excellent.

The invention discloses a titanium-aluminum alloy surface high-temperature protection composite coating and a preparation method thereof, and belongs to the technical field of metal material surface modification. The thickness of the composite coating is uniform and controllable within the range of 2-6 microns, the composite coating is composed of three phases of TiSi2, Ti5Si3 and Al2O3, TiSi2 / Ti5Si3 is a continuous phase, and Al2O3 is a dispersed phase; the continuous phase TiSi2 / Ti5Si3 is in contact with and combined with a titanium-aluminum alloy matrix, and the dispersed phase Al2O3 is not in contact with the matrix. The preparation method comprises the steps that the titanium-aluminum alloy is subjected to pretreatment of cutting, polishing and cleaning; embedding into Si powder and SiO2 powder, and carrying out high-temperature diffusion in a vacuum environment. Compared with the prior art, the preparation process is simple and efficient, and the high-temperature protective composite coatings with different thicknesses can be prepared by adjusting the high-temperature treatment time.

The invention discloses an aluminum alloy surface and a treatment method thereof, and relates to the technical field of aluminum alloy surface treatment.The treatment method comprises the steps that the surface of an aluminum alloy is cleaned, subjected to chemical pretreatment, subjected to pulse anodic oxidation and then subjected to sealing treatment; an electrolyte used for anodic oxidation comprises the following components in percentage by mass: 10%-30% of sulfuric acid, 0.5%-1% of tea polyphenol, 0.1%-0.3% of cerous nitrate and 0.2%-0.5% of nano aluminum oxide; the confining liquid for confining is prepared from the following components in percentage by mass: 0.5 to 1 percent of chitosan particles, 0.2 to 0.5 percent of nano zinc oxide and 0.1 to 0.3 percent of cerium complex; wherein the cerium complex is cerium oxalate or cerium acetylacetonate hydrate. According to the aluminum alloy surface treatment method, the surface of the aluminum alloy matrix contains the pulse oxide layer and the closed film layer, and the formed aluminum alloy surface has good mechanical performance, insulating performance and anti-aging performance.

The invention discloses a niobium-titanium-tungsten alloy based on 3D printing, a gradient material of the niobium-titanium-tungsten alloy and a preparation method of the niobium-titanium-tungsten alloy. Mixed powder is used as a raw material, and short-process and low-cost preparation of the niobium-titanium-tungsten alloy can be achieved through multiple additive manufacturing methods. By utilizing the ratio of the pre-alloyed powder with different impurity contents, the performance of the niobium-titanium-tungsten alloy can be effectively regulated and controlled through various additive manufacturing methods; a niobium-titanium alloy coating is cladded on the surface of the niobium-titanium-tungsten alloy to form a gradient material, and the corrosion resistance of the niobium-titanium-tungsten alloy can be improved on the premise that the performance of a niobium-titanium-tungsten matrix is not obviously changed.

The invention provides a method for preparing high-strength low-thermal-expansion invar alloy through laser cladding and the high-strength low-thermal-expansion invar alloy. According to the method for preparing the high-strength low-thermal-expansion invar alloy through laser cladding, in the printing process of each layer, when the invar alloy is printed, a rolling head is utilized to move along the surface of the printed invar alloy in the printing direction, and the rolling head applies certain load pressure to the invar alloy; according to the method, invar alloy grains can be remarkably refined, residual stress distribution in the printing process is improved, the size and number of defects in the printing process are controlled by introducing plastic deformation through in-situ rolling, and the density of a printed component is improved; according to the method, the yield strength of the invar alloy component is greatly improved on the premise that the low thermal expansion coefficient is guaranteed when the invar alloy component is prepared through the laser cladding technology.

The invention provides a titanium alloy-based composite coating structure, a method for inhibiting upward dilution of Ti during cladding of a wear-resistant layer on the surface of a titanium alloy and application of the titanium alloy-based composite coating structure. The method comprises the steps that an aluminum bronze barrier layer is formed on a titanium alloy substrate, the phase structure of the aluminum bronze barrier layer comprises a Cu phase and a Cu2TiAl phase, the Cu phase and the Cu2TiAl phase are each of an FCC crystal structure, and the Cu2TiAl phase is formed by reacting Ti in the titanium alloy substrate with Cu and Al; the volume ratios of a Cu phase and a Cu2TiAl phase in the aluminum bronze barrier layer are 40%-45% and 55%-60% respectively; and forming the transition alloy wear-resistant layer on the titanium alloy substrate with the aluminum bronze barrier layer by adopting a laser cladding technology. The aluminum bronze barrier layer is arranged to reduce upward dilution of Ti elements in the cladding process of the transition alloy wear-resistant layer, generation of a large number of hard brittle phases is avoided, the difference between the wear-resistant layer and a titanium alloy matrix in the thermophysical property aspect is relieved, and coating cracking is reduced.

The invention relates to the technical field of coatings, in particular to a coating suitable for niobium-silicon alloy surface high-temperature protection and a preparation method of the coating. The coating comprises the following raw materials in parts by weight: 100-120 parts of deionized water, 60-80 parts of nickel-chromium-aluminum-yttrium alloy powder, 60-80 parts of enamel glaze, 50-60 parts of filler, 20-40 parts of a binder, 10-20 parts of nano titanium dioxide and 6-10 parts of an additive. According to the invention, during preparation of the coating, through addition of the filler, the negative thermal expansion performance of zirconium tungstate in the filler and volume shrinkage of zirconium tungstate in a high-temperature state, a buffer space is provided for thermal expansion of other materials in the coating, cracks of the coating due to thermal stress are avoided, and the high-temperature resistance of the coating is improved; kH560 enhances the interfacial compatibility of zirconium tungstate, avoids agglomeration of zirconium tungstate, and enables the zirconium tungstate to be more uniformly distributed in a coating system.

The invention discloses a platinum-based alloy baffle material for an airspace engine, and belongs to the technical field of precious metal alloy materials. By optimizing alloy components and the preparation method, the problems that platinum-based alloy is insufficient in high-temperature mechanical property, rare earth elements are seriously burnt and the like are successfully solved, and a new-generation platinum-based high-temperature structural material with excellent high-temperature mechanical property and oxidation resistance is developed. The material comprises the following components in percentage by mass: 25.0%-30.0% of Ir, 0.10%-1.00% of Sm, 0.10%-1.00% of Ce and the balance of Pt, the preparation method comprises the following steps: weighing a mixture of platinum, iridium, samarium and cerium metals, and sequentially carrying out pre-alloying, vacuum induction melting, pouring, solution treatment and aging treatment, thermoplastic processing, cutting and surface treatment to obtain the platinum-based alloy baffle material for the airspace engine. The tensile strength of the material reaches 48 MPa at the temperature of 1500 DEG C, and the lasting creep life exceeds 54 h under the stress of 50 MPa; under severe thermal shock and cavitation conditions, the surface of the alloy is kept intact, and the 10h oxidation weight gain is lower than 1.6 mg / cm < 2 >.

The present invention relates to a method for simultaneously achieving a superhydrophobic and superoleophobic surface on 5,000 series aluminum alloy in an anodic oxidation process without a pre-patterning step, wherein the uniform anodic oxide film can be produced even without a pre-patterning step, thus making it possible to reduce manufacturing costs, the anodic oxide film can be imparted with superhydrophobicity and superoleophobicity according to a coating composition in which a cross-linked PDMS derivative represented by chemical formula 1 and an organic solvent are used in a specific mixing ratio, the coating composition has a low manufacturing cost and the coating film thickness can be adjusted to several to several tens of nm, thus enabling application to the coating of a microstructured oxide film, and the method can be useful for creating a machine learning database for developing 5,000 series aluminum alloy surface treatment technology.

The invention belongs to the technical field of metal material surface modification, and particularly relates to a magnesium alloy surface conductive corrosion-resistant coating and a preparation method, the conductive corrosion-resistant coating comprises a three-layer structure, the total coating thickness is 33-50 microns, the bottom coating is a low-porosity MAO coating prepared through a micro-arc oxidation method, and the thickness is 20-35 microns; the middle coating is a conductive nano-particle layer prepared by adopting a negative pressure mode; and the top coating is a zinc aluminum oxide conductive layer prepared by adopting a vapor-phase hydrothermal deposition method, and the thickness of the top coating is 13-15 microns. In addition, the invention provides the modified magnesium alloy with the conductive corrosion-resistant coating prepared on the surface, the self-corrosion current density of the modified magnesium alloy is 0.18-1.8 * 10 <-7 > A / cm < 2 >, and the volume resistivity of the modified magnesium alloy is 1.30-5.21 * 10 < 4 > omega.m.

The invention discloses a green preparation method of a silicon-containing FeCo-based nano-alloy surface composite passivation film, which comprises the steps of pretreatment, passivation solution preparation, dipping film formation and post-treatment strengthening, and the passivation solution is a silane-tannic acid composite passivation solution; according to the step of dipping and film forming, the pretreated alloy is dipped into a passivation solution, and a uniform primary film is formed; performing heat treatment and curing on the primary membrane to form a Si-O-M covalent network; and the post-treatment strengthening is that a potassium fluotitanate solution is adopted for sealing treatment, and micropores of the film layer are filled. Through molecular-level compounding of silane and TA, the passivation film with compactness, flexibility and a self-repairing function is constructed; meanwhile, nano cerium oxide is introduced as a nano filler and a corrosion inhibitor, so that the corrosion resistance is synergistically improved; and a low-temperature water-based process is used in the whole process, so that thermal damage to the nano-alloy is avoided, large-scale production can be realized, the limitation of a single-component passivation film is broken through, and an efficient and green solution is provided for anti-corrosion treatment of the high-activity nano-alloy.

The invention belongs to the technical field of metal material preparation, and particularly relates to an anti-oxidation corrosion-resistant high-performance magnesium alloy and a preparation method and application thereof.The magnesium alloy comprises, by mass, 10%-13% of Gd, 0.95%-3% of Y, 0.44%-0.61% of Al and the balance Mg, the total percentage is 100%, and the anti-oxidation corrosion-resistant high-performance magnesium alloy is prepared by optimizing alloy components, accurately controlling microelements in the alloy and particularly adding a proper amount of rare earth elements. And the elements can form a layer of compact protective film on the surface of the alloy, so that invasion of a corrosive medium is effectively prevented. Meanwhile, the microstructure of the magnesium alloy is optimized and the corrosion sensitivity of a grain boundary and a precipitated phase is reduced by regulating and controlling the microstructure and controlling the solidification process and subsequent heat treatment of the alloy, so that the overall corrosion resistance is improved.

The invention belongs to the field of magnesium alloy surface treatment, and particularly relates to a magnesium alloy surface damp-heat-resistant, corrosion-resistant and mildew-proof multifunctional coating and preparation and application thereof. The damp-heat-resistant, corrosion-resistant and mildew-proof multifunctional coating on the surface of the magnesium alloy comprises an inner layer and an outer layer, wherein the inner layer is a micro-arc oxidation layer containing Ta, Sn and Sb elements, and the outer layer is an epoxy resin organic coating containing modified conductive mica powder. The multifunctional coating is used for improving the damp-heat resistance, corrosion resistance and mildew resistance of the surface of the magnesium alloy in the harsh marine atmospheric environment. The method is simple in technological process, convenient to operate, capable of forming a damp-heat-resistant, corrosion-resistant and mould-corrosion-resistant coating on the surface of the magnesium alloy, environmentally friendly, remarkable in application value and capable of meeting the actual requirements for novel multifunctional magnesium alloy materials in the fields of aerospace, ocean engineering and the like.

The invention provides a magnesium alloy surface alloy coating performance regulation and control method based on multi-scale numerical simulation. The magnesium alloy surface alloy coating performance regulation and control method comprises the steps that S1, microscopic coordination structure and solvation structure characteristics of all metal ions in multi-metal ion liquid electrolyte are simulated and analyzed; s2, fitting a reduction reaction mechanism and kinetic parameters of solvated ions on an electrode interface under an atomic scale; s3, verifying and optimizing an electrochemical reduction path of an electrode interface; s4, obtaining an influence rule of electrode interface microenvironment evolution on the performance of the plating layer; s5, constructing a process parameter-performance mapping relation database, and reversely and dynamically optimizing the electro-deposition parameters; and S6, based on the optimized electro-deposition parameters, magnesium alloy is used as a cathode for electroplating, and a surface alloy coating which is high in bonding strength, resistant to abrasion and resistant to corrosion is obtained. According to the method, by combining atom-molecule-macroscopic multi-scale numerical simulation and machine learning, screening and performance optimization of the magnesium alloy surface coating can be rapidly and accurately achieved, and the screening period is shortened.

The application discloses an aluminum alloy surface fine polishing polishing composition, polishing liquid and application thereof, and particularly belongs to the technical field of metal surface treatment. The polishing composition comprises the following components in mass fraction: 70-80 parts of silica sol, 1-4 parts of dispersing agent, 5-7 parts of surfactant, 5-10 parts of corrosion inhibitor, and 0.5-2 parts of water-retaining agent; and the surfactant is composed of perfluoropolyether, coconut oil alkylolamide and sodium dodecyl benzene sulfonate. The polishing composition provided by the application has high polishing efficiency, can reduce polishing cost, improve product quality, has low material surface roughness and few scratches after polishing treatment, effectively improves the polishing surface quality, improves the overall appearance and durability of the material, and the polishing liquid does not contain toxic substances such as chromium / phosphorus, and is environment-friendly.

The invention discloses a method for acquiring grain orientation characteristics based on optical and height characteristics of an alloy etching structure. The method comprises the following steps: (1) acquiring grain orientation distribution and grain size of an alloy surface structure; (2) obtaining an etching structure on the surface of the alloy; (3) acquiring optical characteristics of the etched structure on the surface of the alloy; (4) obtaining height characteristics of an alloy surface etching structure; and (5) constructing a correlation model of structure grain orientation characteristics based on alloy surface optics and height characteristics, and realizing prediction. Aiming at the test of the alloy grain orientation, the optical and height characteristics of the alloy surface etching structure are synthesized, the measurement of the centimeter-level large sample size or full-area grain orientation of the alloy is easy to realize, and compared with the existing measurement aspect, the method is more efficient and convenient; and more comprehensive and reliable tissue information can be provided for alloy optimization and new material development, and the method has important significance for high-throughput characterization and intelligent manufacturing.

The invention relates to the technical field of metal material surface strengthening and modification, in particular to a preparation method and process of a titanium alloy laser cladding cobalt-based wear-resistant coating. The invention provides a titanium alloy surface laser cladding cobalt-based wear-resistant coating which takes titanium or a titanium alloy as a base material, comprises the following components in percentage by weight: 40-50% of cobalt (Co), 30-40% of tungsten carbide (WC), 10-15% of chromium (Cr), 1-5% of lanthanum hexaboride (LaB6), 2-5% of silicon (Si) and 0.5-3% of calcium fluoride (CaF2), and has the beneficial effects of improving wear resistance, high-temperature stability, corrosion resistance, high hardness, high bonding strength, difficulty in cracking and the like.