2556results about "Hot-dipping/immersion processes" patented technology

The invention discloses an intelligent closed-loop control system for a passivation solution in a hot galvanizing process, particularly relates to the technical field of industrial process automatic control, and is used for solving the problem of large parameter fluctuation caused by the fact that an existing passivation solution control mode lags behind intermittent production takt change. A signal monitoring module identifies a production cycle and calculates an estimated compensation value, an entropy weight generation module generates a weight distribution coefficient based on symbol sequence information entropy, and a data fusion module fuses the estimated compensation value and real-time monitoring data to generate a cooperation instruction. The trajectory prediction module simulates and generates a virtual change trajectory and a dynamic envelope line thereof according to the instruction, the envelope monitoring module monitors the running state of the real trajectory in the envelope line in real time, and the execution early warning module executes the instruction or generates an early warning signal according to the monitoring result. According to the system, prospective prediction and self-adaptive control of parameters of the passivation solution are realized, and the control precision and stability are effectively improved.

The invention discloses a composite negative electrode material and a preparation method thereof and a lithium battery, the composite negative electrode material provided by the invention comprises a three-dimensional porous carbon material, and a lithium-loving metal and a lithium metal which are loaded on a three-dimensional porous carbon skeleton, and the three-dimensional porous carbon material is prepared by taking a ZIFs precursor as a raw material. The three-dimensional porous carbon material prepared by taking the ZIFs precursor as a raw material has a Zn / N-containing double-doped three-dimensional porous carbon skeleton, so that the problems of poor conductivity, insufficient lithium storage aperture and the like of the existing carbon skeleton are solved; a plurality of lithium-loving metal nanoparticles are loaded on the surface of the carbon skeleton, so that the lithium-loving property and the electron conductivity of the carbon skeleton are further enhanced, the uniform deposition of lithium is facilitated, and the growth of dendrites is inhibited; the porous carbon skeleton limits the lithium deposition space, the doped nanoparticles provide lithium-loving sites to guide uniform nucleation, the dual mechanisms synergistically inhibit dendritic crystal growth, and the safety of the lithium metal negative electrode is improved.

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 a zinc skin and zinc powder cleaning device for a galvanized sheet, which relates to the field of galvanized sheet coating cleaning, and comprises a zinc skin and zinc powder removing box arranged between an outlet of a sheet galvanizing cooling section and a tension roller, and two sheet guide parts symmetrically arranged in the zinc skin and zinc powder removing box, the supporting guide roller is arranged in the zinc skin and zinc powder removing box and located between the two plate guide parts, the swinging zinc removing device is arranged with the supporting guide roller as the circle center, and the zinc slag sucking and removing device and the air injection zinc removing device are further included. According to the device, the removal rate of zinc skin and zinc powder on the surface of the galvanized plate is high, meanwhile, zinc slag can be recycled in time, the removed zinc slag is prevented from secondarily polluting the plate surface, meanwhile, the tool bits which work alternately can prevent the tool bits from being overheated during continuous work, and the service life of the tool bits is prolonged.

The invention discloses a production process of high-strength anti-distortion cold-rolled strip steel. The production process comprises the links of raw material preparation, cold rolling, heat treatment, surface treatment and quality detection. Selecting medium-carbon steel with specific components as raw materials, and controlling the tolerance of hot-rolled strip steel; a six-roller unit is adopted for multi-pass rolling in cold rolling, and a plate shape control technology is matched; continuous annealing and gradient quenching-isothermal tempering are applied to heat treatment, so that a specific structure gradient is formed, and the distortion rate is reduced; the surface is subjected to acid pickling, hot galvanizing and a nano ceramic composite coating, so that the corrosion resistance and the wear resistance are improved; and the quality is guaranteed through online detection and sampling inspection. The strip steel produced through the technology is high in strength, good in toughness, high in corrosion resistance and suitable for the high-requirement field.

The invention relates to the field of coating materials, and discloses a passivation solution for a hot-dip galvanized workpiece as well as a preparation method and a use method.The passivation solution is prepared from organic pottery clay, titanium dioxide, ethylene-vinyl acetate copolymer emulsion, waterborne epoxy silicon resin, a silane coupling agent, a coloring agent, filler, an auxiliary and water. The problem of light pollution in areas with high illumination intensity can be effectively solved, workpieces and vegetation in natural scenic areas are organically fused to form beautiful scenery lines, and the technical problems of high cost and weak corrosion resistance of green coatings caused by the fact that green towers are achieved by coating green paint at present can be effectively solved. And the pole tower is green, attractive and good in economic benefit.

The invention relates to the technical field of hot-dip galvanized steel pipe surface treatment, and discloses a hot-dip galvanized steel pipe internal blowing steam electric heating control method and system. The method comprises the steps that the outer diameter, the wall thickness, the surface temperature and steel type information of a galvanized steel pipe are collected, a steam temperature demand value is calculated, the input number and the power duty ratio of sectional type electric heating pipes are dynamically adjusted according to the temperature rise demand, and the heating power is corrected in real time through a cascade closed-loop control system; and calculating the solidification speed of the zinc liquid according to the wall thickness, and processing the thin-walled pipe in a pulse injection mode. The technical problems that in the prior art, steam temperature control precision is insufficient, heating power distribution lacks dynamic adaptation, temperature closed-loop control response lags behind, and a zinc layer on the inner wall of the thin-walled pipe is uneven are solved.

A steel sheet, coated with a metallic coating including, by weight percent, from 7.5 to 9.0% of zinc, from 1.1 to 4.0% of silicon, from 1.1 to 8.0% of magnesium, up to 3.0% of iron, optional elements chosen from Pb, Ni, Zr, or Hf, the content by weight of each element being less than 0.3%, optionally up to 100 ppm of Calcium and unavoidable impurities up to 0.02%, a balance being aluminum, and wherein the coating weight of the metallic coating is from 50 to 500 g / m2 for the sum of both sides of the-steel sheet.

A steel sheet having a tensile strength (TS) of 780 MPa or more and less than 1180 MPa, high LME resistance, and good weld fatigue properties. The steel sheet has a specific chemical composition and a specific steel microstructure. Crystal grains containing an oxide of Si and / or Mn in a region within 4.9 μm in a thickness direction from a surface of the steel sheet have an average grain size in the range of 3 to 10 μm, the lowest Si concentration LSi and the lowest Mn concentration LMn in the region within 4.9 μm in the thickness direction from the surface of the steel sheet and a Si concentration TSi and a Mn concentration TMn at a quarter thickness position of the steel sheet satisfy a specified formula.

The invention discloses an alloyed hot-dip galvanized steel sheet, a substrate of the alloyed hot-dip galvanized steel sheet contains 0-1.0% by mass of Si, the average Fe content in an alloyed hot-dip galvanized layer of the alloyed hot-dip galvanized steel sheet is 7-10% by mass, and the surface phase structure of the alloyed hot-dip galvanized layer contains a columnar zinc-iron alloy phase, the ratio R of the length to the width of the columnar zinc-iron alloy phase is greater than or equal to 2 and less than or equal to Rlt; 7. The pulverization grade of the alloyed hot-dip galvanized steel plate is smaller than or equal to 6 grade, and the pulverization resistance is good. The invention further discloses a manufacturing method of the alloyed hot-dip galvanized steel plate, the manufacturing method is suitable for the low-silicon steel plate, and the alloy phase structure of a steel plate coating is controlled by controlling the air-fuel ratio in the preheating stage in the continuous annealing step, the dew point DP in the soaking stage and the alloying temperature in the alloying step, so that the pulverization resistance of the steel plate is improved.

A galvannealed steel sheet includes: a cold-rolled steel sheet having a chemical composition containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; and a galvannealed layer formed on one or both surfaces of the cold-rolled steel sheet. An Fe-based electroplating layer is absent between the galvannealed layer and the cold-rolled steel sheet. In an emission intensity profile, a value of (ISi,Fe) / (ISi,bulk) is 0.90 or less, where (ISi,Fe) denotes an average Si intensity in a range from an interface between the galvannealed layer and the cold-rolled steel sheet to +0.5 μm towards the cold-rolled steel sheet, and (ISi,bulk) denotes an average Si intensity in the cold-rolled steel sheet. An average value of C concentration in a range of 10 μm to 20 μm in a thickness direction from the interface between the galvannealed layer and the cold-rolled steel sheet is 0.10 mass % or less.

The invention discloses a hot-dip galvanizing strip steel production waste gas treatment mechanism, and relates to the technical field of hot-dip galvanizing strip steel production, the hot-dip galvanizing strip steel production waste gas treatment mechanism comprises a treatment tower body, the treatment tower body comprises a gas inlet dispersion area, a treatment area I, a treatment area II, a treatment area III and a gas exhaust area which are sequentially distributed from bottom to top, and the left side of the upper part of the gas inlet dispersion area communicates with a gas inlet; the top of the exhaust area is communicated with an exhaust port, and the treatment tower body is provided with a spraying unit for spraying alkaline liquid drops to the acid waste gas. The device has the advantages that the main movable assembly and the driving assembly are matched to drive the filler to move in a small range in the annular space, and the filler collides with each other, so that the surface and internal pores are prevented from being blocked by salt crystals and other dirt generated in the reaction; the disturbance block further disturbs the motion trail of the filler while the filler collides in a small range all the time; and spraying operation is matched for flushing, so that the anti-blocking effect is further improved, and the waste gas treatment efficiency is improved.

The invention discloses an energy-saving type multifunctional galvanizing furnace for hot galvanizing, relates to the technical field of metal surface treatment, and aims to solve the technical problem that the galvanizing quality of a workpiece is affected due to the fact that the temperature of molten zinc on the surface of a current open type galvanizing furnace is unstable. The lifting mechanism is arranged at the top of the galvanizing furnace, the lifting mechanism comprises two cover plates for blocking an opening of the galvanizing furnace, a driving assembly for controlling the two cover plates to move in opposite directions and a hanging bracket for clamping and limiting a workpiece, and the hanging bracket can control the workpiece to ascend and descend through the displacement of the two cover plates. The driving assembly is used for controlling the two cover plates to move in the opposite directions, synchronous linkage of workpiece lifting is achieved, a furnace body opening can be tightly plugged in a non-operation state, the furnace body opening is automatically opened when workpieces are galvanized, the proper opening size can be automatically adjusted according to the sizes of the workpieces, the size of the furnace body opening is automatically adjusted, and the service life of the furnace body is prolonged. And heat loss is reduced, and the workpiece surface galvanizing quality is improved.

A brake disc for a disc brake may have a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The disc is provided with a base layer constituted by steel having a nickel content of at most 15% which covers at least one of the two braking surfaces of the braking band.

The present application relates to the technical field of automobile bolt plating, in particular to a hot galvanizing device for automobile bolts, which comprises a processing table, a galvanizing cylinder, a control case, a driving assembly, a lifting assembly and a hanging plate, etc., one side of the processing table is provided with a side plate, the arc-shaped groove on the side plate cooperates with the moving assembly driven by the first motor, so that the base is automatically at the lowest point in the loading and unloading stations, the galvanizing station is precisely aligned with the galvanizing cylinder, the bolts are independently hung through the annular frame, the hanging plate adopts a detachable clamping structure, the second motor drives the bolts to rotate at a constant speed, cooperates with the arc-shaped protrusions at the bottom of the galvanizing cylinder to make the bolts reciprocate and jump, and the lifting assembly controls the immersion depth of the bolts, the device solves the problems of bolt occlusion, collision and uneven plating in the traditional frame soaking process, and through the independent hanging, stable rotation and jumping design, the surface precision of the bolts and the uniformity of the plating layer are ensured.

A Zn—Al—Mg-based hot-dip plated steel sheet includes a hot-dip plated layer formed on a surface of a steel sheet, in which the hot-dip plated layer contains, as an average composition, Al: 5 to 22 mass % and Mg: 1.0 to 10 mass %, with a remainder including Zn and impurities, and in a case where a 5 mm square cross section parallel to a surface of the hot-dip plated layer is exposed at any position of a 3t / 4 position, a t / 2 position, and a t / 4 position from the surface with a thickness of the hot-dip plated layer represented by t, a ratio (B / A (%)) of an area fraction B of a [Zn phase] to a total area fraction A of a [Zn phase] and an [Al / MgZn2 / Zn ternary eutectic structure] of a plating microstructure in at least one cross section is 20% or more.

A production method for a steel component includes preparing a patchwork material including steel sheets that are laid one on another, at least one of overlap surfaces of the steel sheets including a zinc-based plating layer, heating the patchwork material, and performing hot stamping on the patchwork material heated to form the steel component in which a joint part between the steel sheets is disposed in a bent area. When tout denotes a sheet thickness of a steel sheet located on an outer side in the bent area, and tin denotes a sheet thickness of a steel sheet located on an inner side, tout / tin≥1.1 is satisfied. The joint part is disposed in a ridge portion or at a position in a vicinity of the ridge portion, and the position satisfies d / tin<8.2, where d denotes a distance from the ridge portion to the joint part.

An objective of the present invention is to provide a steel sheet having a high strength which can provide excellent appearance quality. The steel sheet has a chemical composition including, in mass %, C: more than 0.030% to 0.145%, Si: 0% to 0.500%, Mn: 0.50% to 2.50%, P: 0% to 0.100%, S: 0% to 0.020%, Al: 0% to 1.000% or less, N: 0% to 0.0100%, and the like, wherein a metal micro-structures consisting of 70 to 95% of ferrite in volume fraction and 5 to 30% of hard phases in volume fraction, and a value X1 obtained by dividing a standard deviation of average Mn concentrations in a rolling direction at ¼ sheet-thickness positions in a sheet thickness direction by an average Mn concentration at the ¼ sheet-thickness positions is 0.025 or less.

The present invention specifically relates to the field of aluminum plating machines. Disclosed is an efficient and environmentally friendly aluminum plating machine device having a waste heat recycling function. The aluminum plating machine device comprises a motor unit, an aluminum plating tank, an aluminum foil supply system, a cooling system, a waste heat recycling device, a control system, a power supply system, and a communication module. By means of real-time data acquisition and intelligent dynamic adjustment of working parameters of a heat exchanger and on the basis of a heat recovery error, a heat exchange area and a medium flow rate are automatically adjusted by using a PID controller, and an intelligent heat distribution system based on process requirements ensures that the required heat is preferentially obtained in each process link. The device improves waste heat recycling efficiency, reduces energy consumption, optimizes resource utilization, ensures efficient and stable operation of a production process, and solves the problems in the prior art of low heat recovery efficiency and non-uniform resource utilization.

The invention discloses a production method of a high-yield 1000MPa-grade ultrahigh-strength galvanized dual-phase steel strip. The production method comprises a smelting-continuous casting process, a hot rolling process, an acid pickling and cold rolling process, a continuous hot galvanizing process and a finishing process. The steel comprises the following chemical components in percentage by mass: 0.11%-0.15% of C, less than or equal to 0.40% of Si, 2.60%-2.85% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.015%-0.060% of Alt, 0.10%-0.30% of Cr, 0.025%-0.040% of Nb, 0.010%-0.025% of Ti, 0.0008%-0.0020% of Ca, less than or equal to 0.0070% of N and the balance of Fe and impurities. The galvanized dual-phase steel strip which is high in yield, ultrahigh in strength and good in corrosion resistance and meets the characteristic requirements of safety, low energy consumption and light weight in the automobile industry.

The invention discloses a galvanized pipe outer blowing ring and a uniform blowing method thereof, and relates to the technical field of galvanized pipe outer blowing rings, the galvanized pipe outer blowing ring comprises an air ring body, the upper side and the lower side of the air ring body are fixedly connected with fixing discs, the side of the air ring body is connected with an air supply pipe in a penetrating mode, and the outer end of the air supply pipe communicates with external air supply equipment; the inner side of the air ring body is provided with a first air outlet hole and a second air outlet hole which can conduct air injection treatment on the galvanized pipe, and electromagnetic valves are arranged in the first air outlet hole and the second air outlet hole correspondingly. According to the air blowing ring outside the galvanized pipe and the uniform air blowing method of the air blowing ring, part of air conveyed into the air ring body is sprayed outwards through the first air outlet holes and the second air outlet holes, so that the outer side of the galvanized pipe is further subjected to air blowing treatment; and the first air outlet holes and the second air outlet holes are matched with each other, so that the outer wall of the galvanized pipe can be subjected to uniform airflow action at different positions, and the situation that local air blowing is insufficient or too strong is avoided.

The embodiment of the invention provides a zinc layer thickness control method and system, and relates to the technical field of zinc layer thickness control, the method comprises the steps that real-time feature data of a molten zinc liquid film attached to the surface of a steel strip is obtained, and the real-time feature data is obtained through a non-contact high-frequency sensor array arranged in the width direction of the steel strip; according to the instant characteristic data and a preset mode library, identifying a behavior mode of the molten zinc liquid film; adjusting purging parameters of the air knife according to the behavior mode to obtain target purging parameters; and the molten zinc liquid film is purged according to the target purging parameters, and the target purging parameters are fed back and adjusted according to the purged molten zinc liquid film. The stability and uniformity of the thickness of the zinc layer can be improved.

A coated steel sheet providing cathodic protection and suitable for manufacturing a press hardened part with good powdering resistance during press-hardening and good corrosion performance. A method for the manufacture of hardened parts starting from a steel sheet coated with a metallic coating. The part has good characteristics with respect to corrosion and powdering resistance. The present disclosure is particularly well suited for the manufacture of automotive vehicles.

Disclosed are a low-silicon and low-carbon equivalent GPa grade multi-phase steel plate / steel strip and a manufacturing method therefor. The steel plate / steel strip comprises the following components in percentages by weight: 0.03-0.07% of C, 0.1-0.5% of Si, 1.7-2.0% of Mn, P≤0.02%, S≤0.01%, N≤0.01%, 0.01-0.05% of Al, 0.4-0.7% of Cr, 0.001-0.005% of B, and 0.07-0.15% of Ti, and also comprises one or both of 0.15-0.4% of Mo or 0.02-0.08% of Nb, with the balance being Fe and other inevitable impurities; and at the same time, the steel plate / steel strip satisfies: the content of available B*≥0.001, the content of available B*=B-[Ti-3.4N-1.2(C-Nb / 7.8)] / 22, CE<0.58, and CE=C+Mn / 6+(Cr+Mo+V) / 5+(Si+Ni+Cu) / 15. The steel plate has a tensile strength of ≥980 MPa and a yield strength of ≥780 MPa, and a hole expansion rate of >50% if an original hole is a punched hole or a hole expansion rate of >60% if the original hole is a reamed hole.

Disclosed is an alloyed hot-dip galvanized steel sheet in which a substrate of the alloyed hot-dip galvanized steel sheet contains 0-1.0% by mass of Si, the average Fe content in an alloyed hot-dip galvanized layer of the alloyed hot-dip galvanized steel sheet is 10-12% by mass, and the surface phase structural composition of the alloyed hot-dip galvanized layer contains a polygonal zinc-iron alloy phase, the ratio R of the length to the width of the polygonal zinc-iron alloy phase is not less than 1 and not more than Rlt; 2. The alloyed hot-dip galvanized steel plate is good in deep drawability. The invention further discloses a manufacturing method of the alloyed hot-dip galvanized steel plate, the manufacturing method is suitable for the low-silicon steel plate, the alloy phase structure of a steel plate coating is controlled by controlling the air-fuel ratio in the preheating stage and the dew point DP in the soaking stage in the continuous annealing step and the alloying temperature in the alloying step, and therefore the deep drawing performance of the steel plate is improved.

The invention discloses a galvanized steel pipe internal blowing process automatic control system and method, and belongs to the technical field of hot galvanizing process intelligent control. Steel pipe structure parameters are obtained and matched with a historical process model, and an initial temperature and pressure value is output; the temperature change rate delta T / delta t of the inner cavity of the steel pipe is collected, and a thermal state vector is established; calculating the current optimal internal blowing pressure P (t) and the pulse frequency f (t) by combining delta T / delta t with the initial parameters T0 and P0 through a fuzzy controller; a PWM driving signal is generated to control an electromagnetic valve and a fan to operate, so that the air blowing rhythm is regulated and controlled; by collecting a pressure falling curve after blowing each time, the falling rate dP / dt is calculated, and the desorption efficiency of the zinc liquid is evaluated; when the deviation exceeds a threshold value, the fuzzy rule base is automatically corrected, and self-learning and optimization of control parameters are achieved; the method improves the internal blowing precision and consistency, is high in adaptability, and can be widely applied to the field of intelligent manufacturing of hot-dip galvanized steel pipes.

The invention relates to the technical field of profile steel galvanization, in particular to a power cable support profile steel weather-resistant galvanization treatment device for purging and weakening a zinc hammer and a treatment process thereof.The power cable support profile steel weather-resistant galvanization treatment device comprises a support, a guide rail and a treatment pond, the guide rail and the treatment pond are arranged on the support, and a moving table is slidably installed on the guide rail and provided with a lifting assembly; fixing plates which are symmetrically arranged are connected to the lifting assembly; the supporting plates are symmetrically arranged on the fixed plate, movable rods which are symmetrically arranged are installed on the fixed plate in a sliding mode, and clamping plates are arranged at the ends of the movable rods; the clamping regulation and control mechanism is arranged on the supporting plate, the clamping regulation and control mechanism can control the two clamping plates to alternately clamp the profile steel through the movable rod, and by controlling the alternate movement of the two sets of clamping plates, it can be guaranteed that the clamped position is galvanized while it is guaranteed that the profile steel is always in the clamped state; therefore, no galvanizing dead angle is generated during section steel galvanizing.

The application provides a preparation method of a galvanized strip steel, the galvanized strip steel and an automobile outer plate, and belongs to the field of steel preparation. The method comprises the following steps: cleaning a strip steel under set parameters to obtain a clean strip steel; annealing the clean strip steel and controlling the following parameters of the annealing: a strip steel running speed, a heating section furnace pressure, a furnace H2 content and a furnace O content, to obtain an annealed strip steel; galvanizing the annealed strip steel and controlling the following parameters of the galvanizing: a zinc pot roller vibration amplitude, a zinc pot liquid level and a zinc pot temperature, to obtain a zinc layer strip steel; flattening and oiling the zinc layer strip steel to obtain a galvanized strip steel. The strip steel cleaning quality before annealing is improved by optimizing the cleaning process parameters; the occurrence frequency of strip steel nodulation in the furnace is reduced by strictly controlling the furnace oxygen content and hydrogen content parameters; the surface galvanizing quality effect is ensured by stabilizing the zinc pot roller vibration amplitude, the zinc pot liquid level and the temperature parameters. Therefore, the surface quality of the galvanized automobile outer plate is improved.

The invention belongs to the technical field of wire production, and particularly relates to a production process of a 95MnNbA steel wire for an ultrahigh-strength traction rope, which comprises the following steps: 1) taking a 95MnNbA steel wire rod as a raw material; 2) drawing a semi-finished product: performing circulating water cooling on a winding drum and a die box of a wire drawing machine in the drawing process, and controlling the temperature of a die to be lower than 90 DEG C; 3) heat treatment: ensuring that the wire temperature is in a range of 925-935 DEG C, and keeping the lead bath temperature in a range of 550-560 DEG C; 4) pickling the steel wire after heat treatment; (5) hot galvanizing, wherein the zinc temperature is controlled within the range of 450-460 DEG C; 11-12 passes are adopted for drawing of a wire drawing machine, the single-pass compression ratio of the first pass is controlled to be 15%-17%, the total compression ratio is controlled to be 85%-92%, the average compression ratio of all the passes is controlled to be 16%-18%, and a special wire drawing die is used as a wire drawing die of the last three passes.

The present application relates to the field of metal material surface treatment, in particular to a preparation method of a corrosion-resistant Zn11Al3Mg coating for acid-free pickling hydrogen reduction high-strength steel plate. First, after smelting, continuous casting and hot rolling, a hot-rolled high-strength steel plate is formed; second, the hot-rolled high-strength steel plate is degreased with alcohol and then placed in a heat treatment furnace which can be supplied with protective gas for hydrogen reduction; then, the hydrogen-reduced hot-rolled high-strength steel plate is soaked in a plating aid; finally, the hot-rolled high-strength steel plate soaked in the plating aid is immersed in a Zn11Al3Mg alloy plating solution for hot dipping. By adding Ru, Lu and Re elements to the high-strength steel, the grain is refined and the activity of the reduced iron layer is improved; by adding Ru, W, Nd, Eu and Yb elements to the Zn-11Al-3Mg alloy plating solution, the adhesion and corrosion resistance of the coating to the reduced iron layer are enhanced. The acid-free pickling hydrogen reduction process avoids environmental pollution and corrosion of the substrate caused by pickling.