123 results about "Alclad" patented technology

The invention relates to the technical field of battery current collectors, in particular to a high-strength composite current collector and a preparation method thereof.The preparation method of the composite aluminum foil current collector comprises the following steps that S1, a base material roll film is modified on a film stretching line so as to improve the tensile strength and reduce the ductility; the base material roll film is a polymer base material roll film for preparing the composite current collector; s2, copper plating or aluminum plating is conducted on the surface of the modified base material roll film; and S3, forming the high-strength composite current collector coiled material. Through base material modification, compared with a composite current collector in the prior art, the composite current collector is higher in strength and lower in total elongation under low elongation, the problem that the compactness of a metal layer becomes poor under high elongation is effectively solved, the modified composite current collector is not prone to being excessively stretched during subsequent procedure operation, and if the modified composite current collector is excessively stretched, the modified composite current collector can be directly fractured, so that the service life of the composite current collector is prolonged. The problem that the compactness of the metal layer is poor but not easy to find due to excessive stretching and non-fracture is solved, and the operation difficulty of procedures such as downstream coating is reduced.

The utility model relates to the field of plate processing equipment, and discloses a novel aluminized zinc alloy plate roller coating device which comprises a conveying structure, a roller coating assembly and a scraper structure, base tables are arranged on the two sides of the bottom of the conveying structure, supporting plates are arranged on the two sides of the tops of the base tables, and connecting columns are arranged on the two sides of the supporting plates. A conveying belt is installed in the connecting column body, one side of the conveying belt is connected with the conveying belt, and a back supporting roller is arranged in the middle of the conveying belt; side plates are arranged on the two sides of the outer portion of the roller coating assembly, roller bodies are arranged in the side plates, control handles are arranged outside the side plates and connected with the roller bodies, a support plate is arranged at the tops of the side plates, and a motor is arranged at the top of the support plate and communicated with the roller bodies. The scraper blade structure comprises a connecting plate, a supporting column, a telescopic spring and a scraper blade. According to the utility model, the adjusting roller is arranged to freely adjust the coating thickness of a plate, and the scraper structure is arranged to perform a scraping function, so that the coating is smooth.

The utility model relates to the technical field of aluminum feeding devices, in particular to a special aluminum feeding device for an aluminum plating machine, which is convenient for feeding, improves the working efficiency and enhances the practicability. Comprising a machine body, a feeding mechanism comprises a bottom plate, the bottom plate is connected with the machine body through bolts, a support is fixedly installed on the bottom plate, a thread rolling disc is placed on the support, a feeding box is fixedly installed on the bottom plate, a working cavity is formed in the feeding box, two box doors are installed at one end of the working cavity in a communicating mode, and a feeding pipe is installed at one end of the working cavity in a communicating mode; a cleaning device is arranged at the input end of the feeding pipe, a base is fixedly installed at the bottom end of the working cavity, a driving roller is rotationally installed on the base, a first groove is formed in the driving roller in a surrounding mode, a motor is fixedly installed on the base, the output end of the motor is fixedly connected with one end of the driving roller, an electric push rod is fixedly installed at the top end of the working cavity, and a U-shaped plate is fixedly installed at the bottom end of the electric push rod. And a driven roller is rotationally mounted on the U-shaped plate.

The application relates to the technical field of image recognition, and discloses a method for detecting explosion welding defects of plated aluminum-zinc-silicon coil plates based on X-ray images. The method acquires an X-ray image sequence of an explosion welding interface of a plated aluminum-zinc-silicon coil plate and inputs the sequence into a physical constraint feature decoupling network, the network comprising a feature extraction backbone, a physical attenuation constraint branch and a defect identification branch. The physical attenuation constraint branch calculates a physical reconstruction loss of a multi-scale space feature map according to an X-ray mass attenuation coefficient matrix of the plated aluminum-zinc-silicon alloy, and reversely propagates the loss to the feature extraction backbone as a regularization term, so as to forcibly separate speckle background features conforming to the physical attenuation law. The application makes the feature decoupling comply with the physical attenuation law, eliminates the interference of speckle artifacts on micro-defect judgment, and avoids missed detection caused by micro-defects being covered by speckles.

This invention discloses an ultra-high strength hydroformed structural component and its manufacturing process, comprising the following steps: First, an aluminum-silicon coated aluminized hot-formed steel pipe is selected to form a welded pipe, and the substrate of the structural component is obtained by hydroforming; Second, a pretreatment system is established for the substrate before heating, and the substrate from step one is transferred into the solution in the pretreatment system and immersed; Third, the pretreated substrate is placed in a heating furnace at - degrees Celsius, so that the solution forms carbides under high temperature, and the substrate is removed after being heated to the set temperature; Fourth, the substrate from step three is placed in a mold with a water flow cooling function, and the upper and lower molds are pressed together to quickly cool and quench the pipe. This invention relates to the field of industrial production technology. This invention can form carbides in the substrate under high temperature through immersion in the solution, without forming oxides, which greatly improves the structural strength of the structural component.

The application provides a pre-coated steel sheet for hot stamping forming, a manufacturing method of the pre-coated steel sheet, a hot stamping forming part, a manufacturing method of the hot stamping forming part and application. 2 When the pre-coating weight is 20-60 g / m 2 , the surface roughness Ra and Rpc of the coating after hot forming are ensured to be high by controlling the surface roughness Ra and Rpc of the pre-coating; the uniformity of the pre-coating weight is stably controlled by controlling the shape of the pre-coating steel sheet and the parameters of the air knife after aluminum-silicon plating; the uniformity of the coating liquefaction and flow after heating is ensured by controlling the uniformity of the pre-coating weight and the uniformity of the heating temperature in the heating process during hot forming, so that the surface roughness Ra and Rpc of the coating after hot forming are uniform. The coating of the hot stamping forming part produced by the application has high and uniform surface roughness Ra and Rpc, so that the whole part has good paint adhesion and corrosion resistance.

A manufacturing method of an aluminum-coated steel sheet includes preparing aluminum (Al) scraps, manufacturing an ingot using the Al scraps, coating a base steel using the ingot, and processing a coated steel sheet. An aluminum-coated steel sheet includes a base steel, and a coating layer formed on the base steel, and the coating layer may contain 8.9 to 9.6 wt % of Si, 1.3 wt % or lower of Fe, 0.7 wt % or lower of Mg, the remainder Al, and other unavoidable impurities.

The invention discloses a three-layer laminated forming sheet metal part rolled into uniform concave-convex and a manufacturing process thereof, and belongs to the technical field of sheet metal part manufacturing technologies, and the sheet metal part comprises an inner-layer aluminum plate, a middle layer and an outer-layer aluminum plate; the surface of the inner-layer aluminum plate and the surface of the outer-layer aluminum plate are both provided with evenly-distributed concave-convex points in a rolling mode, the middle layer is a heat-insulation, heat-preservation and noise-reduction environment-friendly asbestos-free material layer, the inner-layer aluminum plate and the outer-layer aluminum plate are both made of aluminum plates, and the even concave-convex points are rolled on the surfaces of the inner-layer aluminum plate and the outer-layer aluminum plate, so that the surface area of the plate is effectively increased. The strength of the plate is enhanced, the problem that a flat aluminum plate is soft is solved, and the plate can better adapt to various use scenes; on the premise that the strength is guaranteed, the aluminum plates are adopted as inner and outer layer materials, compared with a traditional aluminum-plated plate three-layer structure, the weight is reduced, and the requirement for light weight is met.

The utility model discloses a beta radiation detection device based on an aluminized plastic scintillator detector, and belongs to the technical field of nuclear radiation measuring instruments. The photomultiplier comprises a stainless steel shell, an aluminum shell is arranged in the stainless steel shell, an aluminized plastic scintillator is arranged at the top of the aluminum shell, a photomultiplier is arranged in the aluminum shell, and the photomultiplier is located at the bottom of the aluminized plastic scintillator. According to the utility model, through the arrangement of the aluminum-plated plastic scintillator, the aluminum layer is directly deposited on the plastic scintillation sheet through the magnetron sputtering process, so that the traditional aluminum-plated film is effectively replaced, the structure of the detection device is further simplified, the production cost is also obviously reduced, and the aluminum layer and the plastic scintillator can be tightly combined through the magnetron sputtering process; compared with the prior art, extra assembling steps are avoided, manpower and material consumption is reduced, production efficiency is improved, and the durability of the detector is enhanced due to the fact that the aluminum layer is directly deposited on the surface of the plastic scintillator.

The application provides a hot-dip aluminum-silicon 980MPa Q&P steel cold forming steel plate and a preparation method thereof, and the component of the hot-dip aluminum-silicon base plate is as follows in percentage by mass: C: 0.18% to 0.24%, Si: 1.4% to 2.8%, Mn: 1.9% to 2.5%, P: less than or equal to 0.02%, S: less than or equal to 0.005%, Ti: 0.01 to 0.04%, Nb: less than or equal to 0.04%, Al: less than or equal to 0.005%, and the balance of Fe and inevitable impurities. The preparation method comprises a series of processes such as smelting, hot rolling, pickling, cold rolling, continuous annealing hot-dip aluminum-silicon, and finishing, and the hot-dip aluminum-silicon is ingeniously carried out in the slow cooling stage, perfectly matches the heat treatment system, breaks the limitation that the hot-dip galvanized steel plate must be over-aged at high temperature for a short time, and can make the bainite transformation sufficient; the hot-dip aluminum-silicon 980MPa Q&P steel produced by the application has excellent strength and plasticity.

The utility model discloses a purification type evaporation aluminum plating device, which is arranged on a vacuum cavity and comprises a preheating mechanism, an evaporation mechanism, a heating mechanism and a cooling mechanism, and is characterized in that the preheating mechanism is used for hot melting aluminum materials to obtain molten aluminum; the drainage pipe is arranged at a discharge port of the preheating mechanism; the lifting mechanism is in transmission connection with the drainage pipe to drive the drainage pipe to move up and down so as to close or open a discharge port of the preheating mechanism; and the evaporation boat mechanism is arranged on the outlet side of the drainage pipe and used for evaporating the molten aluminum discharged by the drainage pipe. According to the purification type evaporation aluminum plating device provided by the utility model, the splashing of molten aluminum can be reduced, and the evaporation aluminum plating quality is improved.

The invention relates to a production method of a high-corrosion-resistance cold-rolled hot-dip aluminum-zinc-plated steel plate. The production method comprises the following steps: regulating and controlling components of a base plate in a steelmaking process; regulating and controlling the zinc pot process; regulating and controlling a cooling process after plating; and regulating and controlling a post-treatment process and the like. According to the production method of the high-corrosion-resistance cold-rolled hot-dip aluminum-zinc-plated steel plate, the corrosion resistance of the product is effectively improved by comprehensively improving the three aspects of the base plate, the plating layer and the film layer, and compared with an aluminum-zinc-plated building material product produced through a traditional technology, the corrosion resistance of the high-corrosion-resistance cold-rolled hot-dip aluminum-zinc-plated steel plate is improved by 25% or above.

Provided is an aluminum coated steel sheet having excellent anti-corrosion properties and weldability, and a manufacturing method thereof. The aluminum coated steel sheet includes: an austenitic base steel sheet including at least 70 area % of an austenite microstructure; and an aluminum coating layer formed on the base steel sheet, wherein the base steel sheet includes at least 80 area % of ferrite in a surface layer portion, which denotes a region extending from the interface with the coating layer to a depth of 100 μm into the base steel sheet, and the aluminum coating layer may have a composition comprising 2-12 wt % of Si, 5-30 wt % of Zn, and 0.1-5 wt % of Mn, with the balance being Al and inevitable impurities.

The invention belongs to the technical field of magnesium alloy surface treatment, and discloses a Zn and Al composite coating electroplating method suitable for a magnesium alloy, which comprises the following steps: step 1, zinc electro-deposition of the magnesium alloy; step 2, preparing electroplating aluminum ion liquid; 3, the magnesium alloy subjected to zinc electroplating is directly subjected to aluminum electroplating; step 4, cleaning; and 5, detecting the binding force. The technology of direct aluminum plating after magnesium alloy electrogalvanizing is adopted, the technology is simplified, the stability and controllability are high, the cost is low, the plating layer binding force is excellent, and bubbling, falling and even peeling are avoided after 200 DEG C-2h room temperature water quenching and a cross-grid test can be resisted. And meanwhile, successful deposition can be performed on the two magnesium alloys AZ31B and AZ91D, so that the process is less affected by a base material, and the process has a very good commercial application prospect.

The application provides an aluminized silicon steel and a preparation method thereof, a pre-coated steel and a production process of a hot-formed component. The aluminized silicon steel comprises a pre-coating layer arranged on a steel base. The pre-coating layer comprises an intermediate layer and an aluminized silicon coating layer. The nominal thickness of the aluminized silicon coating layer is 10-33 microns. The aluminized silicon coating layer contains Al-Si phases with a proportion of 5-40% and Al-Si-Fe phases with a proportion of 0.1-15%. The dispersion index of the Al-Si phases and the Al-Si-Fe phases in the aluminized silicon coating layer is greater than or equal to 0.05. In the aluminized silicon steel, the proportions of the Al-Si phases and the Al-Si-Fe phases in the aluminized silicon coating layer are appropriate, and the dispersion index is appropriate, which is helpful to the production of a hot-formed component with small grains. The hot-formed component has a double-layer Al-rich intermetallic compound layer, thereby improving the coating toughness and environmental tolerance of the hot-formed component, reducing the crack sensitivity, and improving the hydrogen brittleness resistance and corrosion resistance of the hot-formed component.

The application provides 800MPa-grade hot-dip aluminized silicon high-hole-expanding multiphase steel and a preparation method thereof. The composition of the steel plate is as follows in terms of percentage by weight: C: 0.06% to 0.09%, Si: 0.1% to 0.4%, Mn: 1.8% to 2.5%, Cr: 0.1% to 0.4%, Mo: 0.05% to 0.3%, Ti: 0.01% to 0.03%, Nb: 0.01% to 0.03%, P: less than or equal to 0.02%, S: less than or equal to 0.005%, 1 / 3: less than or equal to Mo / Cr: less than or equal to 2 / 3, 2.2%: less than or equal to Mn+Cr: less than or equal to 2.8%, and the balance of Fe and inevitable impurities. The chemical composition of the coating includes the following components in terms of percentage by weight: Al content: 88% to 93%, and Si content: 7% to 12%. The production method of the steel plate comprises a series of processes such as smelting, hot rolling, pickling, cold rolling, continuous annealing and aluminized silicon plating, and the structure of the steel plate comprises ferrite, bainite and martensite. In terms of the planar area method, the ferrite content is 18% to 35%, the bainite content is 35% to 62%, and the martensite content is 10% to 40%. The mechanical properties of the steel plate of the application are as follows: tensile strength is more than 800MPa, yield strength is 620MPa to 750MPa, elongation is greater than 14%, and the hole-expanding value is more than 50%, so that the steel plate has good strength and plasticity and formability, and meanwhile, the hole-expanding performance is excellent.

The invention particularly relates to a polyimide flexible composite film for spaceflight and a preparation method of the polyimide flexible composite film. The polyimide flexible composite film for spaceflight comprises an optical function layer, a supporting layer, a bonding layer and a reinforcing layer which are sequentially stacked. According to the invention, through the design and preparation process of the four-layer structure composite film, the product weight reduction is realized, the weight is reduced compared with the existing product, and the launch cost of a spacecraft can be reduced; the heat control performance is good, the solar absorption ratio of an aluminized surface is low, the hemispherical emissivity is low, the alpha s / epsilon h ratio is small, and the heat control characteristic is superior to that of a traditional aluminized film; an ultra-thin structure design is adopted, and the thickness is smaller than that of existing similar products; by introducing the silicon dioxide protective layer, the tolerance of the aluminum layer to atomic oxygen is improved, the service life of the material in a space environment is prolonged, the optical performance change is small after a thermal cycle test, and the material has good environmental adaptability; meanwhile, certain electromagnetic shielding capability is achieved, and the aerospace application requirement can be met.

The invention discloses a high-strength steel structure joint and a preparation process. The high-strength steel structure joint comprises a bearing frame, a first bolt, a movable frame, a second bolt and a multi-directional joint structure. The high-strength steel structure joint can be suitable for multi-position-angle steel structure installation, and the cross-shaped plate frame is arranged in the movable frame, the first hemisphere base, the double-face hemisphere base and the second hemisphere base, so that the overall structural strength is improved; in the node preparation process, high-quality coating is conducted on the inner wall and the outer wall of the steel structure node in a hot dip aluminum plating and micro-arc oxidation treatment mode, so that the overall corrosion resistance of the node is improved; and in the preparation process, grooving equipment is optimally used, the grooving equipment can extend into the machined part, and four notches with cross-shaped extension lines are formed in the machined part, so that the position perpendicularity of the four notches is guaranteed, the cross plate frame is conveniently positioned and mounted in the machined part, and the working efficiency of machining is improved.

The present invention belongs to the field of welding materials, specifically a flux-cored wire containing surface-aluminum-plated titanium carbide particles. It includes an outer skin and a flux core, and the chemical composition and dosage of the flux core are calculated by mass percentage as follows: surface-aluminum-plated titanium carbide particles 8.0%-12.0%, aluminum powder 2.0%-3.0%, chromium powder, molybdenum powder and nickel powder 16%-20% in total, and the mass ratio of chromium powder, molybdenum powder and nickel powder is 52:96:59, ferrosilicon powder 3.0%-5.0%, ferromanganese powder 4.2%-5.8%, ferrovanadium powder 2.8%-4.0%, fluorite powder 3.2%-5.0%, rutile powder 2.8%-4.0%, calcium carbonate powder 3%-5%, and the rest is iron powder. The titanium atoms and iron atoms of the titanium carbide particles of the present invention form metallic bonds and produce a strong bond, and the time taken for the deposited metal to wear 0.5mm is increased to 1.5 times the original time, effectively improving the wear resistance of the deposited metal.

A cooling device and a cooling method for hot-dip plated strip steel, relate to the technical field of hot-dip plating, the cooling device comprises a main cooling air box and an auxiliary cooling air box, the auxiliary cooling air box is located between the main cooling air box and a coating thickness control device, and the auxiliary cooling air box is configured to output a low-pressure airflow to the surface of the strip steel to pre-cool the surface coating of the strip steel. The auxiliary cooling air box uses a low-pressure airflow, thereby avoiding disturbance to the un-solidified coating. The coating after pre-cooling has been preliminarily solidified, and does not need to be naturally cooled for a long distance, thereby not only shortening the setting distance of the main cooling air box, but also reducing the specification requirement of the main cooling air box, thereby reducing the overall land occupation of the cooling system from two aspects, and improving the efficiency and safety of the production process. Meanwhile, the auxiliary air box has low wind speed and small air pressure, can preliminarily cool the aluminum liquid, can rapidly cool the strip steel to below the melting point of the aluminum liquid, realizes refinement of aluminum flowers, and improves the corrosion resistance and surface quality of the hot-dip aluminum layer.

Aluminizing process for a nickel-containing substrate. The invention relates to a process for depositing doped aluminum using a physical vapor deposition method, then melting the aluminum and performing a diffusion heat treatment to produce a modified aluminized coating. This process can be used for manufacturing turbomachine blades. Figure for abstract: Fig. 3.

A crease eliminating method for a color-coated sheet for a downpipe relates to the technical field of manufacturing of color-coated steel sheets, and comprises the following steps: optimizing raw material components (SPHC hot rolled steel comprises 0.03-0.05% of C, less than or equal to 0.03% of Si, less than or equal to 0.25% of Mn, less than or equal to 0.020% of S / P, and 0.02-0.06% of Al), cold rolling (the reduction rate is less than or equal to 85%, and the yield after cold rolling is less than or equal to 850 MPa), aluminum and zinc plating annealing (the direct combustion section is 610-660 DEG C, the RTF section is 780-820 DEG C, and the thermal expansion chamber is 520-560 DEG C); fast cooling and isothermal treatment at 600 DEG C for 15 seconds; and according to the color coating process (curing at the temperature of 216-224 DEG C, slow cooling at the plate temperature of 70-80 DEG C and stretching and straightening elongation of greater than or equal to 0.3%), the yield strength of the product is 270-350 MPa, the elongation of the product is greater than or equal to 25%, and bending creases are eliminated.

The invention belongs to the technical field of metal material surface engineering, and discloses a matching pair composed of a coated steel plate and a coated fastener and a manufacturing method of the matching pair, and by controlling components, processes and matching gaps of a base body and a plating layer of each matching pair assembly, the coated steel plate and the coated fastener are enabled to have good corrosion resistance on the basis that the coated steel plate and the coated fastener have good corrosion resistance. And the mutual galvanic corrosion tendency is reduced to the minimum, a good connection corrosion resisting effect is achieved, and the aluminum-plated galvanized sheet is particularly suitable for occasions where a connection assembly needs to be formed by a galvanized sheet and an aluminum-plated fastener. The invention also provides a non-transitory readable recording medium storing the program of the method and a system comprising the medium, and the program can be called through a processing circuit to execute the method.

The invention relates to the technical field of current collectors, and particularly discloses a method for improving tensile cracks of a metal thin film, a conductive thin film is formed by coating the surface of a base film with slurry containing silver nanowires, a conductive path in the conductive thin film is not prone to being damaged in the stretching or rolling process, the electrochemical performance of the composite metal thin film is enhanced, and the tensile strength of the composite metal thin film is improved. Meanwhile, the surface is relatively rough, so that attachment of evaporated metal is facilitated; when aluminum is evaporated on the surface of the base film, atomized conductive adhesive is added to be attached to the surface of aluminum steam and then deposited on the base film, so that a conductive path is formed while the binding force and compactness of a plating layer are increased, and the problem that the sheet resistance of the surface of the film is increased due to cracks generated in the stretching and rolling processes of the composite aluminum film is solved.

A joint structure according to one embodiment of the present disclosure comprises a first press-formed member and a second press-formed member that are made of steel, a welding bead that joins the first press-formed member and the second press-formed member, and a heat affected zone that is present around the welding bead, wherein one or both of the first press-formed member and the second press-formed member have an aluminum-based plating layer on at least one surface thereof, and the average aluminum concentration of the welding bead is 1.0 mass% or less. Preferably, the joint structure has a plating removed portion that extends along the welding bead, between the welding bead and the aluminum-based plating layer.

The invention discloses an aluminum-silicon plating pot skirt edge deslagging device and a using method, the deslagging device comprises an aluminum-silicon plating pot and a skirt edge arranged at the aluminum-silicon plating pot, and a slag blowing assembly and a deslagging assembly are correspondingly arranged on the two sides of the skirt edge respectively; each slag blowing assembly comprises a slag blowing pipe penetrating through the skirt edge, a nozzle is arranged on the front side, located in the skirt edge of the aluminum-silicon pot, of the slag blowing pipe, and the spraying direction of the nozzle is obliquely downward towards one side of the slag discharging assembly; the slag discharging assembly comprises a slag pumping pipeline extending into the skirt edge from the lower portion of the skirt edge, and the bottom ends, located on the outer side and the inner side of the skirt edge, of the slag pumping pipeline are connected with a slag pumping pump and a slag suction opening correspondingly. According to the slag discharging device for the skirt edge of the aluminum-silicon plating pot and the using method, when the continuous aluminum-silicon plating line aluminum-silicon pot is normally produced, a set of slag discharging device is designed to extend into the skirt edge, air is blown towards the liquid level through the nozzle, aluminum slag is blown from one side of the skirt edge to the other side of the skirt edge, and then the aluminum slag is pumped out of the skirt edge through the slag pumping pump; therefore, the problem of more aluminum slag in a strip steel operation area is solved.

The present disclosure relates to a method for manufacturing aluminium deox, aluminium powder, and zinc oxide in a single batch process. The method comprises feeding galvalume dross into induction furnace to melt the galvalume dross. The method includes extracting zinc oxide powder, aluminium deox and aluminium powder from the molten galvalume dross.

The invention provides an evaporation method and application thereof, and relates to the technical field of vacuum evaporation, the evaporation method comprises the following steps: preheating an evaporation boat, a tungsten mesh and a solid aluminum source arranged on the tungsten mesh; pre-melting treatment is conducted, the solid aluminum source is melted, and molten aluminum covering part of the surface of the tungsten net is formed; pre-evaporation treatment is conducted, the molten aluminum is evaporated, and an initial infiltration area is formed; in the primary wire feeding stage, aluminum wires are fed at the first wire feeding speed, molten aluminum obtained after the aluminum wires are molten is spread in the initial infiltration area till the tungsten mesh is completely infiltrated by the molten aluminum, and at least part of the tungsten mesh is consumed; in the secondary wire feeding stage, aluminum wires are fed at the second wire feeding speed, and the tungsten net is completely consumed; and an evaporation stage: evaporating an aluminum metal layer on the base film. According to the evaporation method provided by the invention, the spreading uniformity and evaporation stability of the molten aluminum are improved, and the technical problems of narrow liquid level, frequent splashing and non-uniform coating thickness caused by non-uniform heat distribution in the traditional process are solved.