5842results about "Hot-dipping/immersion processes" patented technology

Provided is a high-strength steel sheet having excellent member strength, ductility, stretch flangeability, bendability of a shear end surface, and low-temperature toughness. A high-strength steel sheet having a prescribed component composition and a steel structure in which the area ratio of martensite is 10%-80%, the area ratio of bainite is 2%-70%, the area ratio of ferrite is 80% or less, and the area ratio of retained austenite is 15% or less at a position at 1 / 4 of the sheet thickness. The ratio of the number of martensite blocks in which metastable carbides are present relative to the number of martensite blocks is 2% or more, and the standard deviation [sigma] n of the nano-hardness relative to the average value [Hn] ave of the nano-hardness is 0.60 x [Hn] ave or less when the nano-hardness at 225 points or more is measured at a position of 1 / 4 of the sheet thickness.

The invention provides an intelligent control method and system for the zinc layer thickness of continuous hot galvanizing, and relates to the technical field of data processing, and the method comprises the steps: collecting the historical production data of a production line, and constructing a zinc layer thickness and air knife pressure prediction model; the two models are trained according to historical data, and a setting table of the distance and height of the air knife is obtained through statistical analysis; acquiring real-time production data, determining air knife parameters according to the setting table, and inputting the air knife parameters into the trained air knife pressure prediction model to obtain an air knife pressure set value; and inputting the real-time data and the air knife set value into the zinc layer thickness prediction model to obtain a first zinc layer thickness prediction value. If the predicted value meets a preset standard, current air knife parameters are stored, otherwise, a feedback adjustment mechanism is used for adjusting air knife pressure, and a second zinc layer thickness predicted value is calculated; if the adjusted predicted value meets the requirement, air knife parameters are stored; if the requirement is not met, the adjusting step is repeated; and intelligent control is carried out through the stored air knife parameters.

The invention discloses a 340MPa grade P-containing hot-dip galvanized iron alloy high-strength IF steel, the chemical composition of which is as follows by weight: C: ≤0.003%, Si: ≤0.03%, Mn: 0.35-0.65%, P: 0.03-0.075%, S≤0.010%, Als: 0.020-0.045%, Nb: 0.008-0.015%, Ti: 0.02-0.03%, B: 0.0004-0.0010%, N≤0.0035%, and the remainder is Fe and unavoidable impurities; The elements also meet the following restrictions: calculated according to the corresponding weight percentage of each element, 10C+3N+2S≤Ti+2Nb≤12C+3N+2S, 60B≤P≤80B; the present invention adds P element to IF steel, and through composition and process optimization control, obtains a P-containing hot-dip galvanized iron alloy high-strength IF steel with a yield strength of 180-320 MPa, a tensile strength of 340-440 MPa, an elongation of 35-46%, a value (average plastic strain ratio) ≥1.8, high surface quality, high formability, and good cold brittleness.

The invention provides a hydrogen induced crack resistant 2000MPa grade zinc-based coated steel plate, which comprises a base plate and a coating, the base plate comprises the following components in percentage by weight: 0.32%-0.40% of C, 0.15%-0.45% of Si, 1.30%-2.50% of Mn, less than or equal to 0.02% of P, less than or equal to 0.02% of S, 0.03%-1.80% of Al, 0.02%-0.10% of Nb, 0.02%-0.15% of Ti, 0.002%-0.005% of B, 0.15%-0.60% of Cr, and Fe and other inevitable impurities; and the plating layer comprises the following components in percentage by mass: 0.15%-3.50% of Al and the balance of Zn. The invention further provides a manufacturing method of the hydrogen induced crack resistant 2000 MPa grade zinc-based plated steel plate. The manufacturing method comprises the steps of smelting, casting, hot rolling and hot dipping. The invention further discloses a hot stamping method of the hydrogen induced crack resistant 2000MPa-grade zinc-based coating steel plate. The hot stamping method comprises the steps of steel plate heating, steel plate cooling and hot stamping. According to the hot stamping forming part produced through the method, the tensile strength of the steel plate is larger than 2000 MPa, the yield strength is larger than 1400 MPa, the elongation is larger than 5%, and the delayed fracture resistance is excellent.

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.

A steel sheet according to the present invention has a specific chemical composition and a steel microstructure including, in terms of area fraction, ferrite: 40% or more and 70% or less, a total of bainite and tempered martensite: 5% or more and 30% or less, retained austenite: 4% or more and 18% or less, fresh martensite: 8% or more and 35% or less, and the remainder: 5% or less. Cementite particles are present in the retained austenite, a ratio of an area fraction of the cementite particles in the retained austenite to an area fraction of the retained austenite is 5% or more and 25% or less, and the steel sheet has a tensile strength of 780 MPa or more and less than 980 MPa.

The multi-wire photovoltaic welding strip automatic forming equipment comprises a wire drawing device, an annealing device, a tin coating device and a wire take-up device which are sequentially arranged, the front end of the wire drawing device is connected with a wire frame, and the wire drawing device comprises a plurality of machine boxes corresponding to the wire frame; the case pulls a copper cable to the annealing device through a first wire pulling wheel set and a second wire pulling wheel set in the case, the annealing device conveys the copper cable to the tin coating device after being processed by an annealing mechanism, the tin coating device processes the copper cable through a tin coating mechanism and a tin blowing mechanism, and the take-up device pulls the copper cable through a double-station take-up mechanism to penetrate through the whole equipment and take up the copper cable. According to the multi-wire photovoltaic welding strip automatic forming equipment, copper cables can be automatically pulled and taken up, annealing, tin coating, tin blowing and other machining can be completed in the running process, each device is correspondingly provided with a plurality of machining stations, the multiple copper cables can be machined at the same time, the machining efficiency is improved, manual operation is not needed in the whole process, and the production cost is reduced. And the safety is higher.

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.

According to the technical scheme, the efficient hot-dip galvanizing method based on the zinc liquid purification technology comprises the following steps of incoming material inspection, degreasing, acid pickling, rinsing, plating assisting, drying, hot-dip galvanizing, zinc draining and cooling, and the hot-dip galvanizing process is dynamically matched with electromagnetic stirring strength through gradual temperature control; based on a temperature-iron content response curve, parameters of all procedures are accurately controlled, temperature dynamic adjustment is achieved, collaborative optimization of the zinc liquid purification and slag salvaging process is achieved, and the method has the advantages that zinc slag is reduced, the coating uniformity is improved, and energy consumption is reduced.

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 an automatic tin plating device for circuit board chip welding, and relates to the technical field of chip welding, the automatic tin plating device comprises a tin liquid pool, a chip feeding workbench, a four-way conveying mechanism and a thermal resistance mechanism, a chip stacking cylinder is vertically installed on the chip feeding workbench, the thermal resistance mechanism comprises a rack, a lifting seat, a finger air cylinder and a cold sheet, and the lifting seat is connected with the finger air cylinder. The lifting seat is installed on the rack, a finger air cylinder is installed at one end of the lifting seat, two clamping jaws of the finger air cylinder are each provided with a cold piece, cold air is introduced into the cold pieces, the four-way conveying mechanism comprises a portal frame, a three-way conveying mechanism and an overturning plate, and the three-way conveying mechanism is installed on the portal frame; the three-direction conveying mechanism has moving freedom degrees in the X direction, the Y direction and the Z direction in a space coordinate system, the overturning plate is rotationally installed on the three-direction conveying mechanism, a rotating disc is rotationally installed at the bottom of the overturning plate, and a negative pressure suction cup is arranged on the rotating disc. And the cold sheet can isolate high temperature from being transmitted to the chip, so that the chip can be well protected from being influenced in the tin plating process.

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 a high-strength outer plate with excellent flanging forming performance and a preparation method, and belongs to the technical field of steel manufacturing. The high-strength outer plate comprises the following chemical components in percentage by mass: 0.05%-0.14% of C, 0.1%-0.4% of Si, 0.8%-1.4% of Mn, less than or equal to 0.01% of P, less than or equal to 0.005% of S, 0.5%-1.0% of Al, 0.01%-0.04% of Ti and a matrix element Fe, the microstructure of the high-strength outer plate comprises, by area ratio, 80%-90% of ferrite, 5%-15% of martensite and 2%-5% of retained austenite. By designing chemical components and microstructures, ferrite provides good elongation and deformability, martensite improves the strength of the material, and the element Ti realizes grain refinement by forming a precipitated phase, so that not only is the requirement on the waviness of the outer plate favorably realized, but also the hole expansion rate of the material can be improved. According to the obtained high-strength outer plate, the balance of various mechanical properties such as strength, ductility and hole expansion rate is achieved while the surface quality is met, and the forming and performance requirements of the outer plate are met.

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 relates to the technical field of alloy steel, in particular to 590MPa-grade short-process hot-dip galvanized low-density steel and a preparation method thereof. The high-strength steel is composed of the following chemical components in percentage by weight: 0.06%-0.11% of C, 0.5%-0.8% of Si, 0.7%-1.15% of Mn, 0.01%-0.04% of P, less than or equal to 0.03% of S, 3.0%-5.8% of Al, 0.01%-0.05% of Ti, 0.001%-0.004% of N and the balance of Fe and inevitable impurities. The technological process comprises the steps of smelting, medium and thin slab continuous casting and rolling, acid pickling, cold rolling and hot galvanizing. The hot-dip galvanized low-density steel has the tensile strength of more than 590 MPa and the elongation of more than 25%, is low in cost, simple in process and low in production difficulty, and can meet the requirements of environmental protection, energy conservation and emission reduction.

The invention relates to a preparation method of a photovoltaic welding strip, the photovoltaic welding strip, a photovoltaic module and a preparation method, and the preparation method comprises the following steps: S1, carrying out the oxide removal and annealing treatment of an oxygen-free copper wire at the same time, and obtaining an annealed copper strip after cooling; s2, in the protection environment of inert gas, the annealed copper strip is immersed in molten brazing filler metal alloy liquid for surface tin plating, and after cooling, a plated copper strip with an alloy plating layer is obtained; s3, oxide on the surface of the plated copper strip is removed; s4, immersing the plated copper strip subjected to oxide removal into a film forming substance, and drying to obtain a film forming welding strip; wherein the film forming substance does not contain carboxyl. According to the method, oxide removal and annealing treatment are carried out at the same time, the photovoltaic welding strip which is high in preparation efficiency and can be welded without participation of scaling powder can be achieved, the photovoltaic welding strip is combined with the preparation technology of a photovoltaic module, and a high-reliability module can be obtained.

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

The present application relates to the technical field of alloy materials, and provides high-strength hydrogen-embrittlement-resistant press hardening steel and a preparation method therefor and a use thereof. The high-strength hydrogen-embrittlement-resistant press hardening steel comprises the following components in percentage by weight: 0.22-0.28% of C, 0.8-1.4% of Mn, 0.01-0.08% of Nb, 0.2-0.8% of Cr, 0.001-0.005% of B, 0.01-0.06% of Ti, 0-0.5% of V, 0-0.5% of Si, 0-1.0% of Mo, 0-2.0% of Ni, 0-1.0% of W, and the balance being Fe and inevitable impurities, wherein the ratio of the weight percentage of Cr to the weight percentage of Nb is greater than 8. The high-strength hydrogen-embrittlement-resistant press hardening steel can have excellent strength and hydrogen embrittlement resistance, so that the safety performance of vehicles can be greatly improved, and the purpose of light weight is achieved.

The utility model provides a hot galvanizing strip steel edge heating device, and relates to the technical field of hot galvanizing strip steel production, the hot galvanizing strip steel edge heating device comprises a shell, strip steel, an air supply assembly and two air knives, the strip steel penetrates through the shell, and the left side and the right side of the strip steel are each provided with a heating assembly, a first adjusting assembly and a second adjusting assembly; by arranging the heating assembly, the cooling speed of the strip steel edge coating can be slowed down, so that the phenomenon that the strip steel edge coating is too thick is prevented, the strip steel quality is guaranteed, the heating assembly can heat the strip steel edge from the upper side and the lower side at the same time, the heating uniformity is improved, and the heating effect is improved; by arranging the first adjusting assembly, the distance between the first air outlet pipe and the second air outlet pipe can be adjusted according to actual use requirements so as to adapt to strip steel of different thicknesses, and the use stability is improved; and by arranging the second adjusting assembly, the distance between the two heating assemblies located on the left side and the right side of the strip steel can be adjusted according to actual use requirements so as to adapt to the strip steel with different widths, and the use stability is improved.

Provided is a high-strength steel plate that is excellent in all of strain dispersion ability, ductility, bendability, and delayed fracture resistance under atmospheric corrosion and in a painted state. The steel plate has a specified composition and microstructure, and has an average value [τq] of the stress at which plastic deformation begins, τq, measured by nanoindentation at a position 1 / 4 of the plate thickness of the steel plate, of 1.70 GPa to 3.30 GPa, a standard deviation σq of said τq of 0.42 GPa or less, and further, when the average value [τs] of the stress at which plastic deformation begins, τs, measured by nanoindentation at a position 10 μm from the surface of the steel plate is taken as 0.85 × [τs], the proportion of measurement points that are less than 30.0% is 1.

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 provides a multi-dimensional adjustable electromagnetic stabilizing device and a hot galvanizing process production line. The multi-dimensional adjustable electromagnetic stabilizing device is used for preventing materials from shaking and comprises a left upper coil assembly, a right upper coil assembly, a left lower coil assembly and a right lower coil assembly. The upper left coil assembly and the upper right coil assembly are located on the two sides of a material respectively, and the lower left coil assembly and the lower right coil assembly are located on the two sides of the material respectively. Each of the left upper coil assembly, the left lower coil assembly, the right upper coil assembly and the right lower coil assembly comprises multiple pairs of pole coils with the same magnetic pole distribution, and the multiple pairs of pole coils are distributed in the width direction of materials; each pair of pole coils is mounted on the transverse moving mechanism; the transverse moving mechanism is mounted on the longitudinal moving mechanism; according to the electromagnetic stabilizing device, shaking of the strip steel is restrained through electromagnetic force, the shaking amplitude of the strip steel can be greatly reduced through an electromagnetic stabilizing system, and due to the non-contact characteristic of the electromagnetic stabilizing system, the strip steel can be stabilized, and scratches to the surface of the strip steel are avoided.

The invention provides a multi-layer plating control method for a steel-wood combined template, and relates to the technical field of plating process optimization, and the method comprises the following steps: calculating a secondary thickness difference between a secondary plating standard thickness and a maximum thickness intermediate value, carrying out secondary plating scheme control analysis by taking the secondary thickness difference as a plating target, and outputting optimized secondary plating parameters; (N-1) deviation areas are determined, secondary local plating scheme control analysis is conducted according to the (N-1) local thickness differences, and (N-1) optimized secondary local plating parameters are determined; and secondary overall plating is conducted on the target steel frame according to the optimized secondary local plating parameters, and after overall plating is completed, layered plating is conducted on the N-1 deviation areas according to the N-1 optimized secondary local plating parameters. By means of the method, the technical problems that in a traditional method, control parameters cannot be precisely connected, thickness fluctuation is likely to occur, and the overall plating layer quality is affected can be solved, the plating layer thickness fluctuation problem can be eliminated, the overall plating layer quality is improved, and the effect of high corrosion resistance and wear resistance is achieved.

The invention discloses a method for improving corrosion resistance of steel, and belongs to the technical field of metal protection. The method for improving the corrosion resistance of the steel comprises the following procedures of acid pickling, rinsing, drying, reduction, hot dipping, passivation, drying and packaging. Replacing a plating assisting process in the hot dipping process with a thermal reduction process; and in the thermal reduction process, hydrogen with the volume content of 3-25% is adopted for thermal reduction. A plating assisting technology in a traditional hot dipping technology is replaced with a reduction technology, the steel obtained after acid pickling is dried and then fed into the atmosphere box, a small amount of iron oxide remaining on the surface of the steel is reduced into sponge iron in the hydrogen reduction atmosphere, the surface of the steel keeps active, and then a zinc-based or zinc alloy plating layer can be better plated; therefore, the corrosion resistance of the steel is greatly improved, and the service life is prolonged.

The invention relates to a steel plate base body, a pre-plated steel plate and a preparation method thereof, a hot forming component and a preparation method thereof, and an automobile structural part. The steel plate substrate comprises 0.35 to 0.45 wt% of C, 0.1 to 0.5 wt% of Si, 0.6 to 1.6 wt% of Mn, 0.10 wt% or less of P, 0.10 wt% or less of S, 0.1 to 0.5 wt% of Cr, 0.001 to 0.006 wt% of B, 0.10 to 0.50 wt% of Al, 0.001 to 0.1 wt% of Ti, 0.001 to 0.1 wt% of Nb, 0.0002 to 0.02 wt% of RE, 0.2 wt% or less of impurities, and the balance of Fe; wherein RE comprises one or more of Ce, La, Y, Pr, Nd and Sm. The strength performance of the hot-formed steel plate can be improved, and the hydrogen-induced delayed cracking condition can be improved.

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.