238 results about "Hot-dip galvanization" patented technology

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.

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.

Provided is a hot-rolled steel sheet by which excellent LME resistance can be achieved. A hot-rolled steel sheet according to the present disclosure contains, in terms of mass%, 0.030-0.110% C, 0.01-0.50% Si, 0.50-1.50% Mn, 0.025% or less P, 0.010% or less S, 0.010-0.070% Al, 0.0070% or less N, 0.055-0.200% Ti, 0.030-0.150% Nb, 0.0010-0.0050% B, 0-0.20% V, and 0-1.00% Cr, with the remainder consisting of Fe and impurities. The area ratio of bainitic ferrite is 85% or greater, and in a surface layer region from the surface of the hot-rolled steel sheet to a depth position of 0.2 mm in the sheet thickness direction, the total length of the prior austenite grain boundary in which BO2 - is detected by time-of-flight secondary ion mass spectrometry is 1.20-5.00 mm per 100 μm × 100 μm, and the B segregation degree at the prior austenite grain boundary is 40 or greater.

Provided is a hot-rolled steel sheet that exhibits excellent LME resistance. The hot-rolled steel sheet according to the present disclosure contains, in mass%, 0.030-0.110% of C, 0.01-0.50% of Si, 0.50-1.50% of Mn, 0.025% or less of P, 0.010% or less of S, 0.010-0.070% of Al, 0.0070% or less of N, 0.055-0.200% of Ti, 0.020-0.100% of W, 0.0010-0.0050% of B, and the balance being Fe with impurities. In the microstructure, the area ratio of bainitic ferrite is 85% or more. In a surface layer region from the surface of the hot-rolled steel sheet to a depth of 0.2 mm in the sheet thickness direction, the total length of the old austenite grain boundary in which BO2 - is detected by the time-of-flight secondary ion mass spectrometry is 0.80-5.00 mm per 100 μm x 100 μm. The B segregation degree at the old austenite grain boundary is 80 or more.

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.

This utility model discloses a bearing ring for offshore wind power generation, relating to the field of wind power generation, comprising a lower bearing body and an upper bearing body. This utility model, through the arrangement of the lower bearing body, upper bearing body, and balls, connects the entire bearing ring via the lower and upper bearing bodies. This multi-layer assembly improves the overall strength of the bearing ring. Simultaneously, a sealing sleeve at the connection point protects the lower and upper bearing bodies, enhancing the sealing performance and strength of the bearing ring. The lower bearing body and anti-corrosion coating, applied to the surfaces of both the lower and upper bearing bodies with hot-dip galvanized coating, provide excellent corrosion and wear resistance, offering long-term effective protection for the bearing ring. Furthermore, the technology is mature and relatively low-cost, making it suitable for corrosion protection of offshore wind power bearing rings.

Provided are: a hot-dip galvanized sheet that has a TS of 1180 MPa or greater, is excellent in formability, peel strength of a corona bond, and delayed peeling resistance at welded portions, and with which a component can be manufactured with a high dimensional accuracy; and a method for manufacturing the same. A hot-dip galvanized steel sheet according to the present invention is characterized by including a base steel sheet and a hot-dip galvanized layer formed on a surface thereof, wherein: the base steel sheet has a prescribed component composition and a prescribed steel structure; the amount of C contained in the surface layer of the base steel sheet is 0.150% or less; the value obtained by dividing the amount of C contained in the surface layer of the base steel sheet by the amount of C contained in the base steel sheet as a whole is less than 0.85; the hydrogen content [H] (mass ppm) in steel of hydrogen having a binding energy between the base steel sheet and a hydrogen trap site of 10 to 100 kJ / mol is 0.30 mass ppm or less; and the average Vickers hardness of the surface layer of the base steel sheet is denoted by HvS and satisfies formula (1) below.　(1): [H] ≤ (480 - HvS) / 320

This invention discloses a 490MPa grade duplex steel outer plate and its production method. Its chemical composition and mass percentage are as follows: C≤0.09%, Si≤0.08%, Mn: 1.40~1.60%, P: 0.010~0.030%, Al≤0.15%, Cr: 0.20~0.40%, V: 0.13~0.17%, B: 0.002~0.005%, with the balance being Fe and unavoidable impurities. The production method includes converter or electric furnace smelting, RH refining, continuous casting into billets, heating in a heating furnace, hot rolling, coiling, pickling, and hot-dip galvanizing. This duplex steel replaces traditional mild steels such as IF steel and BH steel, and is used to manufacture automotive, especially passenger car, door outer panels, engine hood outer panels, and fender outer panels. It possesses excellent dent resistance, flanging properties, formability, and high surface quality meeting O5 plate requirements, exhibiting superior overall performance.

The application provides a method for regulating microstructure of hot-dip galvanizing zinc-aluminum-magnesium alloy through directional solidification technology, and belongs to the technical field of hot-dip plating. The technical problem solved by the application is that, in the actual production process, the accurate control of the cooling process cannot be realized, which leads to serious deficiencies in the accurate regulation of the solidification behavior and the alloy structure of the zinc-aluminum-magnesium coating. The technical scheme adopted by the application is that the coating surface temperature in each cooling process in the actual production process is measured, and the corresponding simulation results are combined to obtain the coating cooling parameters in the actual production process, and on this basis, the directional solidification test parameters are designed, so that the regulation of the microstructure of the hot-dip galvanizing zinc-aluminum-magnesium alloy through the directional solidification technology is realized. The method provided by the application can regulate the phase composition and the area fraction of the eutectic structure of the hot-dip galvanizing zinc-aluminum-magnesium alloy under different cooling processes through the directional solidification technology, so as to provide important theoretical guidance for improving the hot-dip galvanizing zinc-aluminum-magnesium process in the actual production process.

The application discloses a preparation method of wear-resistant and corrosion-resistant hot-dip galvanized steel plate and belongs to the technical field of surface strengthening. The preparation method comprises the following steps: S1, hot rolling; S2, cold rolling; S3, hot-dip galvanizing: the cold-rolled steel plate is heated to 700-718 DEG C and kept for 5-10 min, and then the hot-dip galvanizing is carried out by slowly cooling at 5-8 DEG C / s to 410-415 DEG C, the galvanizing temperature is 440-450 DEG C, the galvanizing time is 18-22 s; after the galvanizing, the galvanized steel plate is cooled and dried, the content of Sn in the melt for the hot-dip galvanizing is 0.8-1.0% by mass percentage, and the rest is Zn; the galvanized steel plate is obtained; S4, surface treatment: the galvanized steel plate is sprayed with a YSn3 coating by using plasma spraying to obtain the wear-resistant and corrosion-resistant hot-dip galvanized steel plate. The wear-resistant and corrosion-resistant hot-dip galvanized steel plate obtained by the application has a double-layer structure, the inner layer is a zinc layer, and the outer layer is covered with a YSn3 layer, so that the wear-resistant and corrosion-resistant hot-dip galvanized steel plate has the effects of wear resistance, corrosion resistance and surface repair.

The utility model provides an automatic alarm and automatic carbon dioxide fire extinguishing device for a hot-dip galvanizing machine head, and relates to the technical field of hot-dip galvanizing equipment. The automatic alarming and carbon dioxide automatic fire extinguishing device for the hot-dip galvanizing machine head comprises the hot-dip galvanizing machine head, a fire extinguishing mechanism and an automatic control mechanism, the hot-dip galvanizing machine head comprises a machine head sealing cover, a zinc throwing frame tightening device and a zinc throwing frame; the automatic control part comprises a monitoring probe, a control part, a nitrogen cylinder, a gas electromagnetic valve and a release valve; the monitoring probe is installed in the machine head sealing cover and electrically connected with the control piece, and the gas electromagnetic valve is connected with the control piece and the nitrogen cylinder; the control piece is electrically connected with a buzzer alarm and an alarm lamp. According to the automatic alarm and carbon dioxide fire extinguishing device for the hot-dip galvanizing machine head, the technical problems that the interior of a closed machine head of an existing hot-dip galvanizing zinc pot is prone to being on fire, fire is not prone to being extinguished, large economic losses are prone to being caused, and the production recovery time is long are solved.

Method for hot-dip galvanizing a galvanized iron or steel component, wherein the galvanized iron or steel component is subjected to an activation treatment prior to hot-dip galvanizing such that and / or with the stipulation that the galvanized iron or steel component subjected to the activation treatment has an electrical resistance at the surface of the zinc layer of no more than 500 kΩ · cm 2 exhibits, and wherein the galvanized iron or steel component that has undergone activation treatment is subsequently subjected to hot-dip galvanizing, where the electrical resistance at the surface of the zinc layer of the galvanized iron or steel component is determined before the activation treatment, where the activation treatment, depending on the electrical resistance at the surface of the zinc layer of the galvanized iron or steel component, comprises only a flux treatment or a pickling treatment and a flux treatment, where the electrical resistance at the surface of the zinc layer is at most 500 kΩ · cm 2 As an activation treatment, at least a flux treatment is carried out and where the electrical resistance at the surface of the zinc layer is more than 500 kΩ · cm 2 As an activation treatment, at least initially a pickling treatment and subsequently a flux treatment are carried out.

This invention provides an alloyed hot-dip galvanized steel sheet with a tensile strength of 590 MPa or higher, excellent ductility and microcrack resistance, comprising a steel plate and an alloyed hot-dip galvanized layer. The steel sheet has a carbon equivalent (Ceq) of 0.370 or higher and less than 0.520, and a total Nb and Ti content of 0.010 to 0.080% by mass. At one-quarter of the plate thickness, the martensite area fraction is 5 to 30%. From the surface of the steel sheet to a depth of 20 μm, the martensite area fraction is 5 to 30%, the original austenite grain size is 3.0 μm or less (martensite area fraction 50% or higher), and the total Nb and Ti content in precipitates smaller than 100 nm is 50 ppm by mass or more, while the total Nb and Ti content in precipitates larger than 100 nm is 350 ppm by mass or less. Within a range from the surface of the steel plate to a depth of 1 μm, the long sides of the Si and Mn oxides present at the grain boundaries are less than 200 nm.

A hydrogen induced cracking-resistant cold-rolled hot-dip galvanized ultra-high-strength dual-phase steel, comprising a substrate and a galvanized layer plated on the substrate, wherein the substrate contains Fe and inevitable impurity elements, and the substrate further contains the following chemical elements in percentage by mass: 0.1-0.18% of C, 2.2-3.0% of Mn, 0.2-0.6% of Si, 0.03-0.3% of Al, 0.01-0.1% of Nb, 0.01-0.1% of Ti, 0.04-0.2% of Mo, and 0.0005-0.003% of B. The matrixes of the microstructure of the substrate are ferrite and martensite, the microstructure of the substrate further comprises a carbide precipitation phase having a size less than 100 nm, and the carbide particles and the matrixes are in a coherent or semi-coherent state. A manufacturing method for the dual-phase steel comprises the following steps: (1) smelting and casting; (2) hot rolling; (3) acid pickling; (4) cold rolling; (5) hot-dip galvanizing and recrystallization annealing; and (6) cooling after galvanizing.

The invention provides an automatic deslagging iron wire hot-dip galvanizing pot which is characterized in that a zinc pot body is filled with molten zinc, the periphery of an iron wire is immersed in the molten zinc to form a galvanized wire, the galvanized wire is led out from one side of the zinc pot body, an outer blowing ring and a guide plate are mounted in the zinc pot body, and the periphery of the galvanized wire penetrates through the outer blowing ring and then is led out from one side of the zinc pot body; and a guide plate is arranged below the outer blowing ring, and the external compressor can blow compressed gas to the periphery of the galvanized wire through the outer blowing ring. According to the zinc pot, redundant zinc materials on the periphery of a galvanized wire can be blown away and recycled into the zinc pot through compressed air, the compressed air is guided to the position above the position where the galvanized wire is guided out of a galvanizing liquid through the guiding effect of the guiding plate, the liquid level can be blown through the compressed air, and the zinc materials are recycled. The oxide dross is prevented from being attached to the outer surface of the galvanized wire to influence the product quality, the utilization rate of compressed air is improved, the use of electrical components is reduced, and the production and maintenance cost is reduced.

This invention provides a water-based paint composition that exhibits rust-preventive properties on hot-dip galvanized surfaces even in harsh environments such as salt spray tests. [Solution] An aqueous paint composition comprising the following components (A) to (C). (A) Ingredients: (meth)acrylic emulsion (B) Ingredients: Phosphate-based rust inhibitor (C) Component: Particles having silanol groups on their surface

Provided are: a hot-dip galvanized steel sheet which has a TS of 1700 MPa or more and a YS of 1250 MPa or more, and is excellent in all of the moldability, corona-bond delamination strength, and weld-zone delayed delamination resistance characteristics; and a method for producing the same. A hot-dip galvanized steel sheet according to the present invention is characterized by having a base steel sheet and a hot-dip galvanized layer and is characterized in that: the base steel sheet has a prescribed component composition and a prescribed steel structure; the C content in the surface layer of the base steel sheet is 0.250% or less; the value obtained by dividing the C content in the surface layer of the base steel sheet by the C content of the entirety of the base steel sheet is less than 0.85; an in-steel hydrogen content [H] (mass ppm) of hydrogen, in which a binding energy with a hydrogen trap site of the base steel sheet is 10-100 kJ / mol, is 0.30 mass ppm or less; and when the average Vickers hardness of the surface layer of the base steel sheet is HvS, the following formula (1) is satisfied.　(1): [H]≤(580-HvS) / 320

The hot-dip galvanizing flux circulating device comprises a hot dipping box and a clamping block, a supporting frame is arranged on the outer side of the hot dipping box, a connecting strip is fixed to the supporting frame, an open hole is formed in the connecting strip, the clamping block is arranged in the open hole in a penetrating mode, a handle is fixed to the outer wall of the clamping block, and the handle is fixed to the outer wall of the clamping block. And a control panel is mounted on the outer wall of the rear side of the hot dipping box. According to the hot-dip galvanizing flux circulating device, the impurity pushing scraper is driven by the air cylinder to move, the impurity pushing scraper can scrape the inner wall of the hot dipping box, accumulation of impurities in the hot dipping box is reduced, the plating flux can be filtered for the first time conveniently through the filter cartridge, the coarse filter screen and the fine filter screen are matched, the plating flux can be filtered better and more sufficiently, and the plating flux can be filtered more thoroughly. The quality of the plating assistant is improved, impurities in the plating assistant are reduced, the clamping blocks are in threaded connection with the open holes, and a worker adjusts the positions of the clamping blocks by rotating the handles, so that the clamping blocks can be in good contact with the outer wall of the filter box.

The present invention relates to a hot-dip galvanized steel sheet to be used for home appliances, vehicles, and the like, and the objective of the present invention is to provide a hot-dip galvanized steel sheet having excellent surface appearance and low-temperature bonding brittleness.

The present invention relates to a method and a device for preparing bath compositions within hot-dip galvanizing plants, in particular a flux bath, wherein process fluid of the flux bath is transferred in batch operation into at least one separate precipitation bath, in which ammonia (NH3) and hydrogen peroxide (H2O2) are alternately added to the process fluid until no pH change or decrease is measurable when hydrogen peroxide is added.

This invention discloses an artificial intelligence-based hot-dip galvanized layer uniformity detection system, comprising: a hardware acquisition layer (101), a data processing layer (102), an intelligent analysis layer (103), and an evaluation output layer (104) arranged from top to bottom, interconnected via an industrial Ethernet network; the hardware acquisition layer consists of a vision acquisition module and a mechanical transmission unit, used to simultaneously acquire images of the galvanized layer surface and data on the thickness distribution of the galvanized layer surface; the data processing layer consists of a data preprocessing module, used to process the images of the galvanized layer surface and the data on the thickness distribution of the galvanized layer surface; the intelligent analysis layer consists of an AI algorithm processing module, used for galvanized layer region segmentation, multi-scale feature extraction, and uniformity difference identification, employing an improved U-Net++ algorithm and attention mechanism; the evaluation output layer consists of a quantitative evaluation module, a result output module, and a calibration module, used for uniformity quantitative evaluation, result display, and system accuracy calibration, respectively. A corresponding detection method is also disclosed.

This hot-dip plated steel product has a steel material and a coating layer disposed on the surface of the steel material, and the coating layer has a chemical composition, in mass%, of Al: more than 10% and less than 40%, Mg: 4.0% to 15.0%, the balance being Zn and impurities, and a total amount ΣTR1 of V and Mn: 0.05% to 3.0%. In an element distribution profile obtained by GDS analysis from the surface of the coating layer toward the steel material in the thickness direction of the steel material, when the depth position at which the Fe concentration reaches 95% is defined as the interface between the coating layer and the steel material and the distance from the surface of the coating layer to the interface is defined as the thickness t of the coating layer, the proportion of the depth at which the total amount ΣTR1 shows 0.1% or more is 10% or more of the thickness t.

Provided is a continuous annealing line capable of producing a steel sheet excellent in hydrogen embrittlement resistance. A continuous annealing line 100 comprises: a payoff reel 10 configured to uncoil a cold-rolled coil C to feed a cold-rolled steel sheet S; an annealing furnace 20 configured to continuously anneal the cold-rolled steel sheet S and including a heating zone 22, a soaking zone 24, and a cooling zone 26 that are arranged from an upstream side in a sheet passing direction; a downstream line 30 configured to continuously pass the cold-rolled steel sheet S discharged from the annealing furnace 20 therethrough; a tension reel 50 configured to coil the cold-rolled steel sheet S; and a sound wave irradiator 60 configured to irradiate the cold-rolled steel sheet S being passed from the cooling zone 26 to the tension reel 50 with sound waves.

The invention relates to the technical field of galvanizing, and discloses a high-uniformity hot-dip galvanizing process which comprises the following steps: S1, soaking a workpiece I and a workpiece II in an acid solution; s2, the first workpiece and the second workpiece are washed with water, and the workpieces are washed with clear water; s3, the first workpiece and the second workpiece are immersed in a plating assistant; s4, the first workpiece and the second workpiece are immersed in molten zinc liquid; s5, the first workpiece and the second workpiece are cooled, and after the zinc liquid layers on the surfaces of the first workpiece and the second workpiece are solidified, the galvanized first workpiece and the galvanized second workpiece are checked, trimmed and passivated; s6, asbestos cloth is placed in clean water used for cleaning the first workpiece and the second workpiece, the surface of the asbestos cloth is kept wet, the other surfaces, except for the welding position, of the first workpiece and the second workpiece are covered with the asbestos cloth, the first workpiece and the second workpiece are welded, in the welding process, clean water is continuously poured into the asbestos cloth, and after the humidity of the asbestos cloth is guaranteed, the asbestos cloth is welded; and the spliced galvanized part is obtained.

This hot-dipped Zn-Al-Mg plated steel material comprises a steel material and a plating layer disposed on a surface of the steel material, wherein: the plating layer includes a Zn-Al-Mg-based alloy layer provided above the steel material; the Zn-Al-Mg-based alloy layer has a chemical composition containing, in terms of mass%, 4.5%-30.5% of Al, and 1.05%-10.6% of Mg, with the balance being Zn and impurities; and the Zn-Al-Mg-based alloy layer includes, in terms of area%, 0% to 41.5% of an Al phase, 0%-75.5% of an Al-Zn phase mainly containing Al, 0%-43.4% of a Zn-Al phase mainly containing Zn, 0% to 6.0% of a η+β phase, 0.1%-56.0% of a MgZn2 phase, and 0%-95.2% of a residual phase.

Disclosed is a system (100) and a method (500) for hot dip galvanization using compressed biogas (CBG) as fuel for heating the zinc kettle maintained at 450 ± 10°C. The system (100) comprises a gas delivery module (200), an electronic monitoring and control module (300), and an ignition module (400) communicatively and operably connected. The gas delivery module (200) carries out a stagewise reduction in the CBG pressure. The electronic monitoring and control module (300) receives values from a plurality of sensors to provide a signal to a variable frequency drive (305) to adjust the pressure of air supplied by a combustion blower to achieve a predefined temperature of the zinc kettle. The system (100) and the method (500) reduce dependence on fossil fuels, minimizing the waste going to landfills, and improving real-time visibility of critical system parameters, facilitating better decision-making.

The alloyed hot-dip galvanized steel sheet of the present disclosure has a base steel sheet having a prescribed chemical composition in mass%, and a plated layer, and the existence ratio ER of a specific internal oxide is 40% or less and the interval I of the internal oxide is 300 μm or more when a cross section of the base steel sheet is observed under prescribed conditions. The alloyed hot-dip galvanized steel sheet of the present disclosure is excellent in appearance and the like.

A method for heating a steel sheet includes heating a front surface side and a rear surface side of a steel sheet that is passing through a direct fired furnace that has an oxidation zone where operation is conducted at an air ratio of 1 or more and a reduction zone where operation is conducted at an air ratio of less than 1, in which the heating is carried out with flames injected from at least one slit burner while the steel sheet passes through at least the oxidation zone.

The utility model relates to the technical field of heating equipment, in particular to plating assisting liquid heating equipment for hot-dip galvanizing, which comprises a processing box body, a lifting plating assisting mechanism for heating and preserving heat of plating assisting liquid is arranged on the processing box body, and an automatic liquid supplementing mechanism is arranged in the processing box body. The lifting plating-assisting mechanism comprises a stirring support movably installed in the plating-assisting tank, and a heating inner container used for heating plating-assisting liquid is arranged on the inner wall of the plating-assisting tank. According to the utility model, by arranging the lifting plating assisting mechanism and the automatic liquid supplementing mechanism, and by virtue of the spiral surrounding design and the heat conduction characteristic of the spiral inner pipe, heat energy in the plating assisting tank can be conducted into newly supplemented plating assisting liquid in real time, so that a liquid inlet preheating function is realized, and the temperature of the supplemented liquid can be increased to more than 50 DEG C (only 20-25 DEG C is directly supplemented in the prior art); the follow-up temperature rise energy consumption of the heating inner container can be effectively reduced, temperature fluctuation in the groove caused by cold liquid injection can be avoided, and the quality consistency of a plating layer can be remarkably improved.