3769 results about "Galvanization" patented technology

The invention discloses a suspension conveying device and method for steel member galvanization machining, and particularly relates to the technical field of conveying equipment.The suspension conveying device for steel member galvanization machining comprises a suspension guide rail and further comprises a plurality of moving trolleys evenly distributed in the suspension guide rail to complete suspension conveying actions, and each moving trolley is connected with a guide rail chain to finish power connection. The product hanging rack is hung through the hanging mechanism, the length of the hanging mechanism can be freely adjusted, free adjustment can be completed according to different conveying heights, convenience is improved, repeated disassembly and assembly are not needed, safety protection can be completed on the hanging mechanism by arranging the protection mechanism, and the safety of the product hanging rack is improved. The safety accident of high-altitude falling is avoided, multiple locking of the winding unit can be completed under the cooperation of the gravity locking unit and the centrifugal locking unit, a product on the suspension mechanism can be rapidly locked, and safety and stability are better achieved.

The invention discloses an intelligent production method of a corrosion-resistant pressing rivet nut in the technical field of information, which comprises the following steps: carrying out surface treatment on the pressing rivet nut subjected to heat treatment, selecting a zinc plating or nickel plating process according to the corrosion resistance requirement of a product, and obtaining a uniform and compact plating layer by controlling the parameters of the temperature and the concentration of a plating solution and the electroplating time, the plating layer quality is detected by adopting a plating layer thickness meter and an adhesive force tester, the pre-plating treatment and post-plating treatment processes are optimized, and the protection performance and the appearance quality of the plating layer are improved; integrating a surface defect detection result with other performance indexes to serve as a comprehensive evaluation basis of product quality, establishing a correlation model of pressure riveting nut performance detection data and material attributes, a heat treatment process and a surface treatment process, mining an influence rule of each element on the product performance by adopting a correlation rule mining and time sequence prediction method, and determining the quality of the product. And predicting product performance distribution under different production parameter combinations.

The invention discloses a zinc coating shedding performance detection method and system, particularly relates to the technical field of metal surface treatment quality detection, and is used for solving the problems of high misjudgment rate and insufficient detection precision caused by coating surface pseudo defect interference in the existing method. The method comprises the following steps: synchronously acquiring a multispectral reflection image and three-dimensional morphology data of the surface of a zinc coating through an industrial vision imaging device, extracting grain boundary distribution information based on multispectral data, and identifying radial pseudo defects in combination with a curvature manifold geodesic line energy gradient direction of the three-dimensional morphology; and further performing micro-crack topology analysis and grain boundary spatial correlation verification on the candidate region, eliminating texture interference and grain boundary overlapping regions, and finally outputting a high-confidence fall-off defect detection result, so that the identification capability of real defects under a complex galvanized surface is remarkably improved, and the method is suitable for automatic detection requirements of a high-speed continuous production line.

The invention discloses a machine vision-based intelligent detection method for steel galvanized surface defects, which comprises the following steps: S1, acquiring and preprocessing a steel galvanized surface image to obtain a standardized image; s2, constructing a specular reflection probability graph according to the brightness distribution and the gradient magnitude, and calculating a reflection intensity value; s3, calculating a structure tensor matrix, determining a main direction angle and an anisotropic consistency coefficient, and generating a direction feature matrix; s4, establishing a multi-scale direction adaptive phase kernel function, and performing phase modulation in a frequency domain by adopting an improved phase stretching transformation algorithm; s5, inverse Fourier transform is executed, and a phase response matrix is extracted; s6, performing weighted fusion to obtain a comprehensive phase response diagram; and S7, setting a threshold value according to the noise variance and the statistical characteristics, executing binarization and morphological processing, and outputting a defect region and boundary coordinates. According to the invention, high-precision identification and boundary positioning of steel galvanized surface defects are realized.

The invention discloses a gradient welding strength control method and system for a welded galvanized steel pipe for fire fighting, particularly relates to the technical field of welding automation control, and aims to solve the problem of abnormal welding seam strength gradient caused by instantaneous unbalance of an electric field and a thermal field during dynamic parameter switching in the prior art. Electromagnetic distortion characteristic quantity is extracted through frequency domain energy analysis, and thermodynamic offset state quantity is deduced in combination with a thermal diffusion trend; on the basis of frequency band correlation mapping of electromagnetic and thermodynamic parameters, thermoelectric cooperative imbalance levels are divided through mutual information entropy evolution, and a self-adaptive harmonic attenuation weight tuning instruction is generated; analyzing a mismatching relation between transient disturbance of an environment magnetic field and arc voltage modulation distortion in real time, dynamically generating a magnetic field compensation factor and reversely superposing the magnetic field compensation factor to a control instruction; and in combination with the matching degree of molten pool oscillation energy and a harmonic frequency spectrum, correcting wire feeding rate calibration, reconstructing a multi-band harmonic energy proportion spectrum, outputting an anti-interference welding control signal, and realizing dynamic balance between arc stability and molten pool heat input.

The invention discloses a galvanized steel pipe coating process control method and system, and the method comprises the steps: obtaining galvanized layer integrity prediction information based on obtained galvanizing process selection information and a preset galvanized layer integrity prediction model; based on the obtained welding process control parameters and a preset welding quality prediction model, welding quality prediction information is obtained; analyzing in combination with the zinc coating integrity prediction information and the welding quality prediction information, judging whether the prediction information meets a preset process control index or not, and obtaining parameter model input information according to a judgment result; inputting the parameter model input information into a preset fusion process control model to obtain parameter control information and coating reference control information; on the basis of the parameter control information and the coating reference control information, the galvanizing welding process and the coating process of the galvanized steel pipe are controlled; the galvanized steel pipe coating technology is more reliable and efficient, and the quality and performance of the galvanized steel pipe are improved.

The invention provides a multi-steel-pipe automatic hot galvanizing device which comprises a first material distribution slide way, a first material stirring fluted disc, a middle shaft, a truss and a lifting plate, the first material distribution slide way is sequentially provided with a plurality of material passing gaps from inside to outside, and each material passing gap is used for guiding one to-be-produced steel pipe; and the outlet end of each material passing gap corresponds to a magnetic suction roller of one V-shaped magnetic roller. According to the automatic hot galvanizing device for the multiple steel pipes, the first material distributing sliding way is infiltrated in the zinc melting pot, the multiple steel pipes can be distributed through the first material distributing sliding way to slide into the zinc melting pot, so that each steel pipe can make full contact with liquid zinc, the positions of the steel pipes in the zinc melting pot can be stirred through the first material stirring fluted disc, and the steel pipes can be separated from the zinc melting pot through the first material stirring fluted disc; the steel pipes are lifted to the preset position through the lifting plate, the steel pipes are guided out through the V-shaped magnetic rollers, the multiple steel pipes can be galvanized at the same time through the device, the production efficiency is improved, and the production quality is guaranteed.

The invention belongs to the technical field of hot galvanizing, particularly relates to hot galvanizing equipment and process for pipe fitting processing, and aims to solve the problems that the existing synchronous hoisting of a plurality of pipe fittings is easy to cause steel pipe galvanizing failure, the efficiency of removing galvanizing liquid through an air gun is low, and zinc slag cannot be automatically removed. A cleaning box, a galvanizing box and an inclined face material guide plate are sequentially arranged below the machine frame from left to right, the galvanizing box is used for galvanizing the pipe fittings, the cleaning box is used for collecting redundant galvanizing liquid on the outer walls of the pipe fittings, and a protruding strip is fixed to one side of the top of the inclined face material guide plate. The pipe fitting can be smoothly galvanized in the later period, the guide inclined plate and the V-shaped plate can be knocked during galvanizing to accumulate zinc slag and discharge the zinc slag into the U-shaped pipe, in addition, the pipe fitting can be driven to vibrate while the nozzle blows the galvanizing liquid on the outer wall of the pipe fitting at multiple angles, and therefore the galvanizing liquid can be efficiently and comprehensively removed.

The invention discloses internal and external galvanization equipment for a special pressure vessel, and belongs to the technical field of pressure vessel galvanization, the internal and external galvanization equipment for the special pressure vessel comprises a placing mechanism for galvanization of the pressure vessel, the placing mechanism comprises a bottom plate and a lifting frame, and six connecting rods are fixedly mounted on the lifting frame; each connecting rod is provided with two taking and placing mechanisms used for clamping the pressure container to be galvanized. According to the invention, through the arrangement of the multi-station synchronous operation putting-in mechanism, the automatic lifting, translation and descending of the pressure container are realized, so that the galvanizing, unloading and loading processes are continuously carried out, and the production efficiency is greatly improved; according to the pick-and-place mechanism, through alternate driving of a driving triangular wheel and a driven triangular wheel, supporting points of a clamping rod are switched in a staged mode in the galvanization process, it is guaranteed that connecting lugs of a pressure container are not fixedly shielded, and galvanization blind areas are avoided; through cooperation of the compression spring and the lower friction ring, the passive triangular wheel is kept fixed in a non-driving state, and accidental rotation is prevented.

The invention discloses a galvanized steel sheet blanking and shearing device and a working method thereof, and relates to the technical field of shearing devices. According to the galvanized steel sheet blanking and shearing device and the working method thereof, the galvanized steel sheet blanking and shearing device comprises a shearing machine main body, a lower shearing knife arranged on the shearing machine main body and an upper shearing knife vertically arranged on the shearing machine main body, a dynamic material supporting mechanism is arranged on the shearing machine main body, and the dynamic material supporting mechanism comprises a first rotating seat and a second rotating seat, and the two first rotating seats are arranged on the shearing machine main body. Through the design of the dynamic material supporting mechanism, accurate dynamic material supporting of a sheared steel plate is achieved, and the problems of shearing opening size deviation, stress concentration and the like caused by the fact that the steel plate droops due to gravity in the existing shearing process are solved; the material supporting assembly synchronously ascends at the moment of shearing, it is ensured that the steel plate is supported in time, and falling deformation or impact on equipment is avoided.

The invention provides a zinc-plated aluminum-magnesium steel strip surface coating image enhancement method, and relates to the technical field of image enhancement. A multi-scale feature extraction module provided by the invention adopts a method of combining an improved adaptive threshold local binary pattern and a directional gradient feature to extract edge textures and structural features under different scales; the feature selectivity enhancement module adopts an improved multi-scale direction response suppression and sparse activation enhancement method to perform direction saliency selection and detail region response improvement on the multi-scale feature map; and the cross-scale feature fusion module constructs a structural response graph based on local contrast variance, realizes pixel-level weighted fusion of a multi-scale feature graph, and finally outputs an enhanced zinc-aluminum-magnesium-plated steel strip surface coating image.

The invention discloses lanthanum-cerium mixed rare earth corrosion-resistant twisted steel with yield strength of 400MPa. The lanthanum-cerium mixed rare earth corrosion-resistant twisted steel comprises the following elements: 0.10 to 0.20 percent of C, 0.25 to 0.80 percent of Si, 0.90 to 1.60 percent of Mn, 0.020 to 0.045 percent of V, 0.003 to 0.010 percent of Ti, less than or equal to 0.010 percent of P, less than or equal to 0.010 percent of S, 0.25 to 0.65 percent of Ni, 0.25 to 0.70 percent of Cr, 0.10 to 0.18 percent of RE, less than or equal to 0.20 percent of Cu, less than or equal to 0.004 percent of O, less than or equal to 0.006 percent of N and the balance of Fe and inevitable impurities. The invention further discloses a production method of the lanthanum-cerium mixed rare earth corrosion-resistant twisted steel with the yield strength being 400 MPa. The production method comprises the working procedures of converter smelting, argon blowing refining, LF furnace refining, continuous casting and rolling, and the lanthanum-cerium mixed rare earth reinforced alloy cored wire and the silicon-calcium wire are fed into molten steel in the argon blowing refining process. The components, inclusions and mechanical properties of the produced 400 MPa-grade lanthanum-cerium mixed rare earth steel bar completely meet the technical requirements of the steel bar, the quality control requirement is met, and the 400 MPa-grade lanthanum-cerium mixed rare earth steel bar has the advantages of being high in strength, high in plasticity, resistant to corrosion and the like. The service life of the steel is prolonged, coating and galvanization are avoided, the burden of environmental protection is relieved, and reasonable application of resources is facilitated.

The invention discloses a special pipe galvanization processing device and method, and relates to the technical field of transfer devices.The special pipe galvanization processing device comprises a mounting plate, a galvanization box is arranged on the side of the mounting plate, a supporting frame is fixedly mounted at the bottom of the galvanization box, a first motor and a second motor are fixedly mounted on the side of the mounting plate, and a water inlet pipe is arranged on the side of the galvanization box in a communicating mode; a water outlet pipe is arranged at the bottom of the galvanizing box in a communicating mode, a galvanizing assembly and a shaking assembly are arranged on the side portion of the mounting plate and used in cooperation, and a supporting assembly is arranged above the galvanizing box. Through the arrangement of the shaking assembly, redundant zinc liquid is shaken off, the drying time of the zinc liquid on the surface of the special-shaped pipe can be shortened, after the residual zinc liquid on the surface of the special-shaped pipe is reduced, the solidification process of the zinc liquid can be completed more quickly, and therefore the waiting time is shortened.

The invention relates to the technical field of steel pipe hot galvanizing, in particular to steel pipe hot galvanizing automation equipment and a galvanizing technology.The steel pipe hot galvanizing automation equipment comprises a zinc liquid pool, a second horizontal moving part is fixedly arranged on one side of the zinc liquid pool, placing tables are arranged on one side of the second horizontal moving part at intervals, and the upper ends of the placing tables are in threaded connection with blocking strips through bolts; a moving assembly is arranged above the molten zinc pool, a stirring assembly is arranged on the outer surface of the moving assembly, a deslagging assembly is arranged at the upper end of the molten zinc pool, first electric telescopic rods are detachably connected to the two sides of the molten zinc pool through supports, push plates are fixedly arranged at one ends of the first electric telescopic rods, and an air blowing part is arranged on one side of the molten zinc pool in a penetrating mode. Through the arrangement of the moving assembly and the slag removal assembly, automatic hot galvanizing of the special-shaped steel pipe is achieved, automatic removal of zinc slag on the surface of zinc liquid can be achieved, through the arrangement of the moving assembly, the stirring assembly and the first electric telescopic rod, residues of the zinc liquid can be reduced, and the possibility of zinc tumor occurrence is reduced.

The invention discloses a production method of a 500MPa-grade galvanized dual-phase steel strip for an automobile bracket. The 500MPa-grade galvanized dual-phase steel strip comprises the following chemical components in percentage by mass: 0.05-0.08% of C, less than or equal to 0.25% of S , 1.5-1.8% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.015-0.060% of Alt, 0.01-0.25% of Cr, 0.0010-0.0030% of Ca and the balance of Fe. The production method specifically comprises the following steps: a smelting-continuous casting production process flow; a hot rolling production technological process; pickling and cold rolling; and carrying out continuous hot galvanizing and finishing processes. The 500MPa-grade galvanized dual-phase steel for the automobile bracket has the characteristics of low yield ratio, high work hardening capacity, good corrosion resistance, welding performance, no yield elongation, no room-temperature aging, high elongation and the like, and can meet the requirements of users on light-weight and high-corrosion-resistance material selection.

The invention relates to a low-cost cold-rolled low-alloy high-strength steel production method which comprises the following process steps: S1, hot coiling: adopting the process flows of molten iron pretreatment, 150t top-bottom combined blown converter, LF furnace and continuous casting to produce a qualified plate blank; s2, acid rolling is conducted, oxide scales on the hot-rolled surface are removed through a reasonable acid pickling technology, sufficient deformation distortion energy during annealing is provided through a proper acid rolling reduction rate, and power is provided for sufficient recrystallization; s3, continuous annealing and galvanization: strictly checking the surface reflectivity before annealing and annealing, ensuring the surface cleanliness, ensuring the surface quality of a final product, heating the cold hard coil to be above the recrystallization temperature through a continuous annealing furnace, ensuring the mechanical property of the final product, completing the annealing and cooling processes through the continuous annealing furnace for continuous annealing and galvanization, and performing continuous annealing and galvanization through an oiling machine. And uniformly coating the surface of the steel plate with anti-rust oil, and generating a final finished product through a coiling machine. The comprehensive tensile property and the surface quality of the cold-rolled low-alloy high-strength steel are guaranteed.

The invention relates to the field of metal processing, and particularly discloses a low-carbon steel oxide scale reduction annealing process and a hot galvanizing process, the low-carbon steel oxide scale reduction annealing process comprises the following steps: S1, pretreatment: firstly carrying out water / abrasive sand blasting treatment on a hot-rolled strip steel substrate, then washing with water, then heating to 650-700 DEG C at a heating rate of 50-60 DEG C / s, and keeping the temperature for 2-3 hours; after heat preservation treatment, taking out and immediately putting into a salt solution to obtain a pretreated base material; s2, reduction annealing: carrying out reduction annealing on the prepared pretreated base material in a reducing gas atmosphere; the hot galvanizing process comprises the following steps: carrying out oxide scale reduction annealing treatment on a hot-rolled strip steel base material; and hot galvanizing is conducted on the hot-rolled strip steel obtained after the oxide scale reduction annealing treatment is conducted in zinc liquid, a zinc coating is formed on the surface of the hot-rolled strip steel, and the hot-galvanized plate is prepared. The method has the characteristics that the oxide scale is effectively reduced, good adhesion of a zinc layer and a substrate is ensured, and the quality of a plating layer is improved.

The invention relates to the technical field of steel plate hot-dip production, and discloses an intelligent scheduling system for a steel plate hot-dip production process. The system comprises a working condition sensing module which is used for continuously collecting steel belt inlet temperature, zinc liquid component concentration fluctuation data, air knife pressure time sequence parameters and roller system operation state signals of a galvanizing pot area; the feature extraction module receives the working condition data flow, analyzes the steel strip surface temperature field distribution features and the zinc liquid viscosity change rule, and generates a process feature spectrum; the parameter optimization module dynamically adjusts membership function parameters and rule base weight coefficients of the fuzzy reinforcement learning controller according to the process characteristic spectrum, and outputs an optimized plating layer control parameter set; the self-adaptive plating layer control module generates a plating layer thickness control instruction based on the real-time zinc liquid temperature parameter and the optimized plating layer control rule set; and the dynamic roller system scheduling module realizes global cooperative control of the roller system speed based on the instruction. The system can realize intelligent scheduling of the steel plate hot-dip production process.

The invention provides a hot galvanizing device for a thin-wall square tube. A feeding assembly and a rotating wheel are arranged in a zinc pot, the feeding assembly is used for limiting the displacement track of a steel tube, the rotating wheel is used for driving the steel tube to move, the zinc pot is filled with a plating material, a pulling-out assembly is used for guiding the steel tube out of the zinc pot, and the feeding assembly comprises a first feeding frame; the first feeding frame is provided with a first guide groove used for guiding a steel pipe, a reinforcing structure is fixedly installed on one side of the first feeding frame, a plurality of first limiting protrusions are distributed on wheel blades of the rotating wheel, the periphery of the steel pipe is located between the two first limiting protrusions, and a plurality of second limiting protrusions are arranged on a pulling-out head of the pulling-out assembly. The periphery of the steel pipe is located between the two second limiting protrusions. According to the hot galvanizing device for the thin-wall square pipe, the shape of the first guide groove can be stabilized through the reinforcing structure, the reliability of the device is improved, so that the galvanizing efficiency of the steel pipe is improved, and the first limiting protrusion and the second limiting protrusion are used for limiting the relative positions of the steel pipe correspondingly.

The invention provides a grounding grid intelligent operation and maintenance system based on digital twinning and computer equipment. A multi-factor coupled corrosion kinetic equation is generated based on a laboratory grounding grid steel sheet accelerated corrosion test, and the corrosion kinetic equation is used for predicting the instantaneous corrosion rate of a galvanized steel sheet and estimating the mass corrosion loss of the steel sheet within specified time; combining the corrosion kinetic equation with the simulation model to establish a steel sheet corrosion data set, and training a physical information neural network to construct a corrosion prediction physical model; training the corrosion prediction physical model by adopting a neural network regression algorithm; constructing a grounding grid digital twin model by taking the corrosion prediction physical model as a base and combining field environment monitoring data; defining a Markov decision process in the digital twin environment of the grounding grid; and based on the feedback and reward function of the digital twin model of the grounding grid, training by adopting a near-end strategy optimization algorithm to obtain an intelligent decision-making body, and continuously optimizing the decision-making of the intelligent decision-making body through an online fine tuning function.

The utility model relates to the technical field of strip steel rolling, in particular to galvanized strip steel production rolling equipment. According to the technical scheme, the device comprises an air outlet pipe, a fixing frame, rollers and an air cooler, the rollers are symmetrically and rotationally installed in the positions, close to the upper surface and the lower surface, of the interior of the fixing frame, cooling cavities are formed in the two rollers, and the two ends of each roller are fixedly connected with a rotary joint A and a rotary joint B correspondingly; connecting pipes A are fixedly connected to the outer sides of the two rotating joints A, the tail ends of the two connecting pipes A are fixedly connected to the outer surface of an air outlet pipe, and an air inlet pipe is fixedly connected to the tail end of the air cooler output pipe. In the hot rolling process of the galvanized strip steel, the temperature of the roller is reduced, the service life of the roller is prolonged, heat of the roller is converted into hot air, production raw materials needing to be heated can be preheated, meanwhile, the hot air drying device can be used for drying the galvanized strip steel after follow-up cleaning operation, and energy consumption is saved.

The invention relates to the technical field of laser cutting equipment, and discloses galvanized coiled plate cutting equipment which comprises a mounting frame, a guide rail structure, a cutting structure, a conveying structure, an intercepting toothed plate, a slag removal fan and a discharging structure. The cutting structure comprises a cutting seat, a laser cutting head, a separated protective cover, the intercepting toothed plate, the slag removal fan and the discharging structure; the separated protective cover is formed by splicing a plurality of splicing covers. Each splicing cover comprises an outer cover plate, an inner air box, a limiting plate, a limiting spring and an air supply hose. When the device is used, high-pressure air is blown out of the inner air box to form a protective air curtain on the splicing cover, the annular air cover and the laser cutting head, and therefore the situation that slag splashes and is intercepted, and zinc steam adheres to the splicing cover, the annular air cover and the laser cutting head can be prevented; and air is forced to be discharged along the cutting seam by the closed space formed by the separation type protective cover, so that the blowing force of the airflow to the lower edge of the notch is enhanced, and the adhering slag can be forcibly stripped.

The utility model discloses a zinc layer thickness control device for a galvanized steel wire, and relates to the technical field of zinc layer thickness control. Comprising a steel wire galvanizing mechanism, the steel wire galvanizing mechanism comprises a bottom plate, one side of the top of the bottom plate is fixedly connected with a left side base, a control panel is installed on one side of the left side base, a steel wire moving and adjusting assembly is fixedly installed on one side of the top of the control panel, and a steel wire body is arranged on the top of the steel wire moving and adjusting assembly; a galvanized pot is mounted on the surface of the base on the left side; the device can regulate and control the thickness of a steel wire galvanizing layer, is favorable for regulating the length of the steel wire extending into galvanizing liquid according to the requirement of steel wire galvanizing so as to regulate the thickness of the galvanizing layer, can regulate and control the thickness of the steel wire galvanizing layer by cooling and regulating the rolling speed of the steel wire, and improves the galvanizing effect of the steel wire; and the thickness of the steel wire galvanized layer is more accurately and efficiently regulated, and the production quality of the galvanized steel wire is improved.

A reinforcement beam for an automotive component is continuously formed with a metal sheet that is roll formed to have at least one tubular portion that extends along a length of the reinforcement beam. A solid state forge weld is formed between an edge of the metal sheet and an intermediate portion of the metal sheet to close a seam that extends along the tubular portion of the reinforcement beam. Prior to forming the solid state forge weld, select portions of the metal sheet are heated to a desirable welding temperature with a high frequency current delivered by electrical contacts to opposing sides of the weld seam. The desired welding temperature may burn off a galvanized coating on the metal sheet at the select portions prior to forming the solid state forge weld that is generally void of zinc inclusions.

The invention relates to the technical field of steel-cored aluminum stranded wires, and provides an overhead high-conductivity steel-cored aluminum stranded wire which comprises a galvanized steel core and aluminum wires stranded on the surface of the galvanized steel core, the galvanized steel core is formed by stranding 19 steel wires, and the aluminum wires are divided into two layers and stranded on the outer side of the galvanized steel core; the preparation method of the galvanized steel core comprises the following steps that after being galvanized, a steel wire is added into a passivation solution to be passivated, and the galvanized steel core is obtained after drying and twisting; the passivation solution is prepared from the following raw material components: waterborne acrylic resin, nickel nitrate, sodium carboxymethyl cellulose, sodium dodecyl sulfate, functionalized single-walled carbon nanotubes and water; the functionalized single-walled carbon nanotube is prepared from the following raw materials: a single-walled carbon nanotube and 5-carboxyl-2, 3-diaminopyridine. According to the technical scheme, the problem that the corrosion resistance of the manufactured overhead steel-cored aluminum stranded wire is poor due to the fact that the corrosion resistance of a galvanized steel core is poor in the prior art is solved.

The utility model discloses a galvanized cylinder inner wall slag removal device which comprises a main body assembly, a slag removal assembly and a slag removal assembly. The deslagging assembly comprises a workbench, a group of mounting plates, an air pump and a moving rod; the workbench is fixed to the top end of the supporting frame, the mounting plates are fixed to one side of the top end of the workbench, the air pump is fixed between the mounting plates, and the moving rod is slidably connected into one end of the air pump. The problems that in the existing galvanizing process, due to the fact that welding needs to be convenient, the front end of the inner wall of a galvanized round pipe does not need to be galvanized, in hot-melted zinc ions, due to the fact that the surface of a steel pipe and the zinc ions generate chemical reaction, the non-galvanized part accumulates part of slag materials in the process, if cleaning is not conducted in time, more and more zinc liquid is generated on the inner wall of a cylinder, and the slag materials are wasted are solved. And the use effect of the steel pipe is affected.

The invention discloses a controllable preparation method for the eutectic phase size of a medium-aluminum type zinc-aluminum-magnesium coating, which comprises the following steps of: preparing the following components in percentage by weight: 0.01 to 0.08 percent of C, less than or equal to 0.03 percent of Si, 0.15 to 0.26 percent of Mn, 0.15 to 0.26 percent of P, less than or equal to 0.01 percent of S, 0.02 to 0.06 percent of Als, less than or equal to 0.3 percent of Ti and the balance of Al; the base material is subjected to annealing treatment, zinc plating treatment and post-plating treatment after multiple working procedures, and the plating layer with the ternary eutectic structure morphology is obtained. Through optimization of base material components, the galvanizing process and the cooling process, accurate control over the eutectic phase size in the plating layer is achieved, and therefore the corrosion resistance, the adhesive force and the uniformity of the plating layer are improved.

The invention discloses high-surface-quality 980MPa-grade hot-dip galvanized dual-phase steel and a preparation method thereof. The high-surface-quality 980MPa-grade hot-dip galvanized dual-phase steel is prepared from the following components in percentage by mass: 0.05 percent to 0.11 percent of C, 0.5 percent to 0.9 percent of Si, 2.1 percent to 2.5 percent of Mn, 0.03 percent to 0.05 percent of Nb, 0.04 percent to 0.06 percent of Ti, 0.13 percent to 0.28 percent of Mo, 0.02 percent to 0.05 percent of Als and the balance of iron and inevitable impurities. According to the method, through innovative humidification annealing and oxidation-reduction dual-process collaborative parameter design, the annealing dew point and the oxygen content are controlled in a segmented mode, stable control over the galvanized surface quality of the high-Si and Mn dual-phase steel is achieved, the effect of improving thick-specification products is obvious, the overall qualification rate is greatly increased, element external oxidation is inhibited, the coating quality is optimized, the production efficiency is improved, and the method is suitable for large-scale popularization and application. The problem of surface peroxidation or zinc layer falling easily caused by a traditional single process is solved, and the high-end requirement for high-performance steel is met.

The present invention addresses the problem of providing a steel sheet and galvannealed steel sheet both having good liquid metal embrittlement (LME) resistance.　This steel sheet has a tensile strength of 780 MPa or more and has specified chemical components. A GDS measurement performed in the thickness direction of the steel sheet finds that the depth at which Bx / B150 ≥ 5.0 is satisfied, where Bx is the light emission intensity at a depth x (μm) and B150 is the light emission intensity at a depth of 150 μm, is 0.5 μm or more from the surface of the steel sheet. The thickness of an oxide formed on the surface of the steel sheet is 0.5 μm or less. An internal oxide layer having a thickness of 1.0 μm or more exists in the thickness direction of the steel sheet from the surface of the steel sheet. Also, this galvannealed steel sheet comprises a galvannealed layer on at least a part of the surface of the steel sheet and the thickness of the oxide formed on the surface of the galvannealed layer is 0.5 μm or less.

The invention discloses a method for removing zinc powder from a galvanized fingerprint-resistant plate stamped television backboard part, which is characterized in that a fingerprint-resistant passivation film on the surface of strip steel is fully dried and cured by controlling the drying temperature of a post-treatment tower after the galvanized fingerprint-resistant plate is passivated, the dyne value is greater than 40, the surface wetting effect is better, and the anti-dezincification effect is better. And meanwhile, a good lubricating effect (low dynamic friction coefficient) is achieved, the surface roughness (Ra) of the finished strip steel is controlled to be 0.80-1.40 microns, and the phenomenon of zinc powder removal in the stamping process can be effectively avoided.