22 results about "Zinc bath" patented technology

The present invention relates to an apparatus for controlling a dross robot, the apparatus comprising: a camera module for capturing a surface of a zinc bath to obtain a surface image; and a processor for processing the surface image to identify a dross distribution area on the surface of the zinc bath in real time, and controlling a dross robot on the basis of the dross distribution area.

The application discloses a kind of electric power steel pipe tower whole hot-dip galvanizing device of galvanizing equipment technical field, including zinc bath and support rod, L type fixed rod fixedly connected in the support rod rear end, the L type fixed rod bottom end is fixedly connected in the zinc bath top, installation groove is set in the right end of the support rod, pin shaft is installed in the installation groove, guide rod is installed on the pin shaft, mounting plate is fixedly set in the zinc bath top one side, the mounting plate is provided with two groups, sprocket is installed on the mounting plate, two groups the mounting plate is all provided with sprocket, baffle is fixedly connected in the front end of the connecting rod, baffle lower half is stably immersed below zinc liquid level, uniform speed moves zinc liquid surface layer dross, and dross is continuously concentrated and pushed to zinc bath single side area, realize dross automation, regularity collection processing, effectively solve the problem that traditional manual salvage is not timely, cleaning is not thorough, liquid surface dross remains.

This invention relates to the field of hot-dip galvanizing technology for steel plates, and particularly to a method for optimizing the microstructure of 780MPa grade reinforced formable hot-dip galvanized multiphase steel. The process route includes a three-stage heating process, pre-oxidation, reduction, a two-stage cooling process, hot-dip galvanizing, and a three-stage variable-temperature cooling process. Through microstructure regulation and pre-oxidation control, the enrichment of Si and Mn elements in high-strength automotive steel to the surface of the strip steel is suppressed, the formation of silicon and manganese oxides is reduced, the oxidation capacity of the pre-oxidation stage is strengthened, and the wettability of the zinc bath is enhanced. This results in a continuous and dense inhibition layer structure in the coating substrate, with uniform grain size and a single-layer inhibition layer grain morphology, reducing the thickening of brittle phases and reducing strip steel loss, thereby avoiding the production of bottom slag in the zinc pot. This invention solves the problem of insufficient zinc layer adhesion in traditional hot-dip galvanized high-strength steel, and the produced 780MPa grade hot-dip galvanized multiphase steel can simultaneously meet the requirements of ultra-high strength, excellent formability, and good coating quality.

The plant (1) for the production of secondary zinc comprises: at least one melting assembly (2) adapted to contain a molten zinc bath (B) and to heat and melt metal residues in the form of shredded scrap and / or grain, the metal residues being composed of metallic zinc; at least one feeding assembly (3) adapted to supply the metal residues to the melting assembly (2); at least one mixing and separation assembly (4) connected to the feeding assembly (3) and associated with the melting assembly (2) and adapted to receive the metal residues, mixing them in the molten zinc bath and to move the process scraps away from the melting assembly (2); at least one pick-up assembly (5) adapted to transfer molten zinc from the melting assembly (2) to a machine for forming secondary solid zinc.

The application discloses a kind of angle steel hot galvanizing system and method, belong to angle steel galvanizing process technical field, it includes zinc bath, transfer frame, lifting appliance and fixed seat, fixed seat includes three fixed plates, lifting appliance includes two horizontally arranged moving rods, the bottom surface of moving rod is equipped with through hanging piece, through hanging piece includes several interval arranged diamond frame, fixed with connecting rod between adjacent two diamond frames, the side surface of through hanging piece close to fixed plate is respectively fixed with several connecting blocks, connecting block can be fixed with fixed plate and is connected, transfer frame is equipped with two placing plates, placing plate and moving rod are mutually parallel arrangement, the top surface of placing plate is equipped with several for placing angle steel and is placed groove, transfer frame is provided with for controlling placing plate and is moved along vertical direction lifting assembly and for pushing angle steel and is moved in the direction close to lifting appliance and is pushed to component.The application has the effect that through hanging efficiency is higher.

This invention discloses a method for controlling the coating quality of galvanized steel sheets to improve zinc layer adhesion, comprising: 1) selecting a measurement point every 5cm along the width of the sheet as a group, and measuring a group at the head, middle, and tail of the coil along the length of the sheet; ensuring that the measured height parameters Ssk, Sku, Sa, Sk, Spk, Smr1, Smr2, and spatial parameters all meet the requirements; 2) the zinc ingots used for galvanizing have a Zn content of 99.2%-99.4%; 3) the zinc bath temperature is 450℃±10℃; 4) after galvanizing, the upper surface of the coating consists of a fragmented δ phase connected to a fully covered γ phase at the bottom layer; 5) the coating weight and coating test values ​​should meet the requirements. This invention, based on the existing general hot-dip galvanizing process flow, focuses on the design of key process parameters, which can enhance the zinc layer adhesion in a low-cost and easy-to-operate manner.

The invention provides a preparation method of an anti-corrosion zinc steel guardrail. The method comprises the steps of pretreatment, plating assistance, hot-dip galvanizing, cleaning after plating, silane treatment, primary spraying and secondary spraying. A zinc chloride-ammonium chloride composite plating assistant is adopted as a plating assistant, the temperature of zinc liquid is 440-480 DEG C, a silane coupling agent aqueous solution with the pH value of 4.5-6.5, the concentration of 1%-3% and the temperature of 30-40 DEG C is adopted in silane treatment, and an electrostatic spraying process is adopted for both primary spraying and secondary spraying. According to the preparation method, process parameters of all procedures are accurately matched, firm combination of the protective layer and the base material is achieved synergistically, the corrosion resistance of the guardrail is remarkably improved, the problems that in the prior art, the corrosion resistance durability is poor, and a coating is prone to falling off are effectively solved, the service life of the guardrail can be prolonged, the operation and maintenance cost can be reduced, the process is stable and controllable, and popularization is easy. The method is suitable for industrial batch production.

This utility model discloses a galvanizing device for a center-partitioned open guardrail, relating to the field of guardrail processing technology. It includes a zinc bath set on the ground, with side plates fixedly installed on both sides of the zinc bath. A skimming assembly is disposed between the two side plates. The skimming assembly slides on the top of the zinc bath, driving floating zinc dross to one side of the zinc bath for centralized collection. This utility model, by using the skimming assembly to drive floating zinc dross and zinc ash to the rear of the zinc bath's inner cavity for centralized collection, avoids zinc dross and zinc ash adhering to the surface of the guardrail during hot-dip galvanizing, thus improving the quality of the hot-dip galvanizing.

This invention provides a de-galvanizing alloy, its preparation method, and its application, belonging to the field of hot-dip galvanizing technology. The de-galvanizing alloy of this invention comprises the following elements by mass percentage: aluminum 7.0%~10.0%, gadolinium 0.7%~1.0%, tin 0.4%~0.6%, with the remainder being zinc and unavoidable impurities. The gadolinium in this invention can react with bismuth in the zinc plating solution to form a high-melting-point alloy with a density of 7.1 g / cm³. 3 GdBi, this compound is solid in zinc plating solution and has a density greater than that of zinc solution (6.8 g / cm³ at 440°C). 3 The bismuth will sink to the bottom of the zinc bath to form bottom dross, which can effectively remove bismuth and solve the zinc spangle problem at its source; tin can promote the uniform dispersion of residual bismuth in the zinc bath and reduce bismuth segregation. The zinc spangle removal alloy described in this invention effectively solves the zinc spangle problem caused by excessive bismuth content in the zinc bath during ultra-thin zinc plating production, without affecting the thickness and corrosion resistance of the zinc coating.

The invention discloses a hot galvanizing method for an extra-high voltage transmission tower steel part, which belongs to the field of hot galvanizing and comprises the steps of hanging materials, pickling with hydrochloric acid to remove rust, cleaning with water, assisting in plating with a solvent, drying, purifying zinc liquid, hot-dip galvanizing and cooling, the zinc liquid purification step comprises slag removal pretreatment, zinc liquid temperature regulation and control, purification agent preparation, purification agent caging and liquid feeding, moving reaction for iron removal and scum removal, and the purification agent comprises industrial-grade metal aluminum wires and water-containing gas substances. The purifying agent is prepared from industrial-grade metal aluminum wires and water-containing gas production substances, wrapped by high-temperature-resistant glass wool cloth into a cluster, loaded into a cage frame made of titanium alloy round steel bars and reciprocatingly moved in the length direction of a zinc pot, so that iron-containing impurities in molten zinc fully react with the purifying agent in the cage frame, and a gray vermicular flocculent reaction product is generated; and then the dross is fished out, so that the purification of iron impurities in the zinc liquid is realized, the liquidity of the zinc liquid is improved, and the adhesive force of a zinc coating on a steel substrate is improved.

The invention discloses an efficient hot galvanizing process based on nickel preplating, and relates to the technical field of metal surface treatment, the process forms a gradient Fe-Ni solid solution transition layer and inhibits the generation of a brittle phase by accurately controlling the thickness of a nickel preplating layer, the surface roughness and the grain size in combination with optimization of an annealing system, zinc liquid components and a subsection cooling strategy. The invention aims to solve the problems of insufficient adhesive force, non-uniform structure, poor batch consistency and the like caused by uncontrollable thickness, interface reaction mismatch and unstable surface state in the high-temperature metallurgical process of nickel pre-plating and hot galvanizing, and realizes high bonding strength, high corrosion resistance, excellent formability and good surface quality through full-flow coordinated regulation and control. And various base materials and high-speed continuous production lines are compatible.

This invention discloses a hot-dip galvanized product and a method for reducing the zinc flow rate of the hot-dip galvanized product, belonging to the field of metallurgical technology. The method of this invention is applicable to coatings with a thickness ≥1.8mm and a coating strength ≥275g / m². 2 Hot-dip galvanized products, such as steel strips, undergo galvanizing in a zinc pot after passing through a cooling section, a hot tension roller section, and a grate section. Before entering the zinc pot, an induction heating device, such as a microwave, is added to raise the surface temperature of the hot-dip galvanized product to 455–465°C. This induction heating device utilizes the skin effect to generate a high-density induced current on the surface of the product, raising the surface temperature of the substrate, such as the steel strip, to 455–465°C through the current heating effect. Furthermore, by optimizing key manufacturing process parameters such as the temperature of the steel plate in the hot tension roller section, the composition of the zinc bath, and the post-galvanizing cooling rate, the incidence of surface zinc flow marks on thick-gauge hot-dip galvanized products is effectively reduced.

The invention discloses a preparation method of a high-corrosion-resistance coated steel plate, and belongs to the technical field of corrosion prevention of metal materials. The core of the method is that specific zinc pot plating solution components are adopted and comprise, by mass, larger than or equal to 15% and smaller than 21% of Al, larger than or equal to 5% and smaller than or equal to 11% of Mg, larger than or equal to 0.05% and smaller than or equal to 0.5% of Si, larger than or equal to 0.05% and smaller than or equal to 2.0% of CeO is creatively added to serve as a grain refiner, and the balance is Zn and inevitable impurities; wherein CeO is added in the form of oxide. Key parameters of the hot dipping process are as follows: the temperature of a zinc pot is 10-20 DEG C higher than the melting point of a plating solution, the temperature of a plate in the pot is 5-20 DEG C higher than the temperature of the zinc pot, and the cooling rate after plating is not lower than 9 DEG C / s. By adding CeO, the microstructure of the coating is effectively refined, the successfully prepared coating has excellent plate corrosion resistance, sacrificial anode protection capability and good processing formability, the process is stable, and industrial continuous production is easy to realize.

The invention discloses a method and device for removing floating objects on the surface of a zinc bath, and the device comprises overflow groove structures which are arranged around a blowing area of a blowing device and in the zinc bath on two sides of a furnace nose; the overflow side of the overflow groove structure is immersed in the zinc bath; the hydraulic lifting device is used for fixedly connecting the overflow groove structure with the zinc bath and adjusting the distance between the overflow side of the overflow groove structure and the liquid level of the zinc bath; the slag collecting tank is arranged at the position, far away from one side of the overflow tank structure, in the zinc bath; the upper part of the slag collecting tank is not communicated with the zinc bath, and the bottom is communicated with the zinc bath; the zinc liquid pump is communicated with the overflow groove structure and the slag collecting groove through a zinc liquid pipeline; and the zinc liquid pump is used for pumping floating objects in the overflow groove structure into the slag collecting groove through the zinc liquid pipeline. According to the method, the floating objects on the surface of the zinc bath can be efficiently and stably removed at low cost, the occurrence rate of the embedding defect of the floating objects is reduced, and the efficiency and quality of the strip steel surface hot dipping process are greatly improved.

A method of hot-press forming an article of zinc-coated steel or zinc alloy, wherein the steel is a product obtained by a steelmaking method comprising the steps of: - shaping molten steel into slabs; - reheating the slabs, preferably to a temperature of 1150°C or higher and preferably for a time of 60 minutes or more; - hot-rolling the steel into a strip, preferably with a finish exit rolling temperature (FRT) above the Ar3 temperature, where Ar3 denotes the temperature at which ferrite transformation begins in the steel during quenching; - coiling the hot-rolled steel strip; - pickling the hot-rolled steel strip; - continuously annealing the strip; - hot-dip coating the steel strip with zinc or zinc alloy at once; - using an immersion time of 3 seconds or more;- maintaining a hot immersion bath temperature of 420°C to 500°C - where the zinc bath contains essentially zinc, at least 0.1% Al and optionally up to 5% Al and optionally up to 4% Mg, the remainder of the bath comprising additional elements, all individually in less than 0.3% and unavoidable impurities; - forming the article by hot pressing.

This invention relates to the field of hot-dip galvanizing, and more particularly to an easily adjustable hot-dip galvanizing processing equipment, comprising a fixed plate and a zinc bath located below it; it also includes electric push rods I fixedly attached to the fixed plate; several electric push rods I are fixedly attached to the fixed plate; the telescopic ends of all electric push rods I are jointly fixedly attached to a rectangular plate, which is located above the fixed plate; the rectangular plate is rotatably connected to two connecting blocks; each connecting block is fixedly attached to a piercing rod. During the hot-dip galvanizing process, this invention controls the electric push rods I to push the rectangular plate, connecting blocks, and piercing rods downwards. The piercing rods move downwards along the inner wall of the hanging rod until they penetrate the circular holes at the upper and lower ends of the workpiece, thereby clearing the circular holes during the hot-dip galvanizing process and preventing impurities in the zinc bath from clogging the holes, thus preventing the zinc bath from flowing into the workpiece and reducing the galvanizing quality.

The invention relates to the field of alloy surface treatment, and particularly discloses a production process of high-corrosion-resistance hot-dip galvanized angle steel. The production process of the high-corrosion-resistance hot-dip galvanized angle steel sequentially comprises the steps of acid pickling, water washing, plating assisting, drying, hot galvanizing, blow plating and cooling. Pickling parameters are controlled at the hydrochloric acid concentration of 13%-17%, and treatment is carried out for 5-10 minutes at the temperature of 20-30 DEG C; a plating assisting solution is prepared from ammonium chloride, zinc chloride and water according to the ratio of 1: 1: 5, and treatment is conducted for 3-5 minutes at the temperature of 60-80 DEG C and the pH value of 5.5-6.5; hot galvanizing is carried out for 12-18 minutes in zinc liquid at the temperature of 440-470 DEG C; and carrying out blow plating by using air flow with the temperature of between 0.3 and 0.6 Bar and the temperature of between 5 and 15 DEG C to finally obtain a uniform plating layer with the thickness of between 30 and 50 microns. The coating binding force, the corrosion resistance and the appearance quality are remarkably improved, waste heat utilization and resource circulation are achieved, and excellent performance and environmental protection benefits are achieved.

This invention discloses a method for controlling zinc dross in hot-dip galvanized automotive steel sheets, comprising: controlling the cleanliness indicators of the substrate surface and regulating the content of residual iron impurities on the strip surface; adjusting the temperature, composition, and level of the zinc bath in the zinc pot; adjusting the spraying conditions of the double overflow guide channel of the furnace nose and the humidification system to match the sealing atmosphere pressure, composition, and dew point parameters; standardizing the zinc pot operating environment and on-site operation procedures; and controlling the surface condition and operational stability of the zinc pot roller system. This invention provides a method for controlling zinc dross in hot-dip galvanized automotive steel sheets, solving the technical problem of insufficient control over zinc dross defects in existing hot-dip galvanized automotive steel sheet production.

This invention discloses a method, equipment, and medium for testing the corrosion resistance of gas pipelines, relating to the field of pipeline corrosion resistance testing technology. The method includes the following steps: obtaining the zinc bath temperature during hot-dip galvanizing of the gas pipeline to obtain galvanizing temperature data, and screening samples for inspection based on the galvanizing temperature data; acquiring images of the sampled gas pipelines to obtain initial image data, and conducting corrosion resistance tests; acquiring images of the sampled gas pipelines after testing to obtain test image data, and performing image corrosion analysis processing to obtain corrosion image data; obtaining the corrosion area of ​​the gas pipeline to obtain the pipeline corrosion resistance test result. This invention addresses the problem that existing pipeline corrosion resistance testing technologies, when detecting the white rust area in salt spray tests on gas pipelines, cannot dynamically set thresholds based on the surface characteristics of the gas pipeline to accurately separate the white rust from the background in the image, resulting in inaccurate white rust area measurements and a low detection rate of defective products.

A method for producing a low-alloy high-strength steel sheet for seat slide rails via continuous hot-dip galvanization, and the steel sheet thereof, comprising: hot rolling temperature of 650℃-670℃, and pickling reduction rate of 50%-60%; the continuous galvanizing process includes: a soaking temperature controlled at 740℃-760℃, a soaking time of 60s-100s, followed by slow cooling to 595℃-615℃, with a slow cooling rate of 2.5℃ / s-5.0℃ / s; then rapid cooling to 440℃-460℃, with a rapid cooling rate of 11℃ / s-25℃ / s, an initial zinc bath temperature of 450℃-470℃, and a post-galvanizing cooling rate of 7℃ / s-14.0℃ / s to 180℃-220℃ after exiting the zinc bath, followed by a water quenching process to room temperature. This invention employs a compositional design of C-Si-Mn supplemented with Nb+Ti microalloying, combined with controlled rolling and cooling in the hot rolling process, high-compression rolling in the pickling process, and homogenized annealing in the galvanizing process to regulate the microstructure. This solves the problem of cracking caused by insufficient local forming performance when using ultra-high strength steel to manufacture small-section seat slide rails.

The utility model is applicable to the technical field of zinc sinking water processing, and provides a transfer barrel for zinc sinking water processing, which comprises a base, a heat insulation barrel is welded at the top of the base, at least two parallel spoilers are fixedly connected at the inner bottom of the heat insulation barrel, a spoiler hole is arranged on the side wall of each spoiler, and the spoiler hole is communicated with the heat insulation barrel. The turbulent flow holes in every two adjacent turbulent flow plates are distributed in a staggered mode in the vertical direction, and a circulating hole is formed in the position, close to the bottom of the heat preservation barrel, of each turbulent flow plate. The arrangement of the spoilers reduces the pressure on the inner wall of the heat preservation barrel caused by shaking of zinc sinking water in the transfer barrel in the transportation process, the arrangement of the spoiler holes can distribute the shaking zinc sinking water so as to reduce the pressure on the inner wall of the heat preservation barrel, and the spoiler holes in every two adjacent spoilers are distributed in a staggered mode in the vertical direction so as to reduce the pressure on the inner wall of the heat preservation barrel. And therefore, the zinc sinking water passing through the turbulent flow holes impacts on another adjacent turbulent flow plate, and the impact on the inner wall of the heat preservation barrel is further reduced.

The invention discloses a dust and foreign matter embedding prevention device for a zinc bathing pool, which comprises an outer layer protection structure arranged above the zinc bathing pool and used for isolating the area of the zinc bathing pool from the external environment; and the inner-layer protection structure is arranged in the outer-layer protection structure and located on the two sides of the wide face of the strip steel, so that two clean / dust raising control areas and two circulation control areas are formed in the area of the air knife. The invention further discloses a dust and foreign matter embedding prevention method for the zinc bath. Dust and foreign matter are prevented from being embedded in the strip steel hot dipping process, so that the strip steel quality is improved.