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It is well known that parts need to be maintained in both industrial and mechanical fields to avoid wear or rust. However, some components due to the impact of the working environment, the general protective measures are difficult to maintain in the long term. Thermal spraying is a good solution to this problem, thermal spraying is a surface-reinforced technology, has been China's key promotion of new technology projects, and thermal spraying technology by virtue of its excellent protection performance has been praised from all walks of life . Well, today Hyun set network small editor to talk with you about what is hot spray technology, thermal spray principle and application area is what.
I. What is thermal spraying technology
What is thermal spraying technology:
thermal spraying is the use of a certain heat source (e.g. arc, plasma spray or flame burning, etc.) to heat and melt coating materials (powder or filamentized metal or non-metallic materials), atomize them into very fine particles with high-speed airflow, and spray them to the surface of the work piece at a high speed to form a coating.
thermal spray alloy powders, including nickel-based, iron-based and cobalt-based alloy powders, are applied to the repair and protection of mechanical components according to different coating hardness. Mechanical components can be made wear-resistant, corrosion-resistant, antioxidant, heat-resistant and other aspects of one or more properties.
thermal spraying technology features:
1. The substring material is unrestricted, it can be metal and non-metallic, and can be sprayed on a variety
material; Sprayable coating materials are extremely wide, thermal spraying technology can be used to spray almost all solid engineering materials, such as carbide, ceramics, metals,
graphite, etc.; During the spraying process, the base material temperature rise is small and does not produce stress
deformation; The operation process is flexible and convenient, not limited by the shape of the work
construction; Coating thicknesses can range from 0.01 to
mm; Coating performance is diverse, can form wear resistance, corrosion resistance, insulation, antioxidant, insulation, conductivity, radiation protection and other special functions of the
coating; The advantages of strong adaptability and good economic benefits.
2. The principle of thermal spraying
thermal spraying refers to a series of processes in which finely dispersed metal or non-metallic coating materials are deposited in a melting or semi-melting state to a prepared substrate surface to form some kind of spray deposition layer.
coating material may be powdery, ribbon, silky or rod-like.
Thermal spray gun provides the necessary heat from fuel gas, arc or plasma arc, heats the thermal spray material to a plastic or molten state, and then withstands the acceleration of compressed air, so that the constrained particle beam shocks to the substation surface.
particles that hit the surface are deformed by stamping, forming laminated sheets that adhere to the surface of the prepared substation, cooling and accumulating, resulting in a layered coating.
coating can be used to resist high temperature corrosion, wear, insulation, electromagnetic waves and other functions due to the differences in coating materials.
3. The application area of thermal spraying
Thermal spraying applications are extensive, all kinds of industries, machinery industry will use thermal spraying technology, has been widely used in casting, paper machinery, textile, printing, metallurgy, electricity, transportation, chemical, glass industry, Electrical line, municipal, light industry and other industries, the following small editor for you to detail:
1, casting
casting, forging equipment work in dust and corrosive environment, mechanical parts wear corrosion will be more serious. Xuzhou Tiangong surface technology can repair the casting machine of various types of hydraulic system parts, such as hydraulic plungers, such as repair and renovation, and all kinds of parts with bits, such as bearing position, sealing position nine, chemical, pesticide machinery often work in acidic and corrosive environment, so repair this kind of machinery, to consider the problem of anti-corrosion of the new plant hydraulic plug brush plating repair site. Repair of pumps, plungers, valve cores, etc. in hydraulic and pressure systems. :(1) Xuzhou Special Forging Machine Tool Manufacturing Co. , Ltd. hydraulic cylinder pull ditch hard injury repair one by one, such as flour mill all kinds of bearing support, motor roel, pressure rollers;
2, papermaking machinery
steamer, oven, oven wall enhancement and repair, a variety of roller surface reinforcement and repair, centrifugal pumps, axial pumps, steam boilers, valves and mixer shaft seals and other components repair, corrugated roller surface reinforcement (after intensive treatment, corrugated roller surface hardness can be increased to HV1200, corrugated roller working life of more than 40 million meters).
3, textile
Lorra, wire hook, sword bar loom selection latitude refers to wear-resistant coating; Head, spindle shaft neck, guide yarn roller, press roller, back tide moisture measuring roller, shaft shaft neck, cloth yarn machine shaft neck;
4, printing
printing printing rollers, ceramic mesh rollers, coating rollers, ink rollers, printing rollers, water rollers, dental pads, dental tablets and so on.
5, metallurgical
blast furnace air port, slag mouth heat-resistant corrosion-resistant coating, slab cast line crystallizers, guide rollers and conveyor rollers, steel and non-ferrous metal processing in a variety of process rollers, steel surface treatment production line of various rollers (such as continuous refract furnace rollers, galvanized sunken rollers and a variety of guide rollers, tight rollers, etc.) wear-resistant, corrosion-resistant and anti-accumulation coating.
5, electric
ball mill, turbine roors and generator roors shaft neck, cylinder binding surface repair; Machine blades, flame barrel, transition section anti-high temperature protective coating, fan imperfle, ball mill and other wear-resistant coating, door core, door rod, valve core, valve accessories, seat wear-resistant corrosion coating and boiler-related equipment components to strengthen repair.
6, transportation
wear-resistant coating of various wear areas, automotive engine seat, sync ring, roll repair and pre-reinforcement, gearbox housing, cylinder plunger, front and rear axle support shaft, door frame rail, engine spindle tile, rocker shaft, half shaft oil seal, pin shaft wear Wear-resistant coating, mud boat head, anti-grinding ring, mud bucket, winch blade, shovel teeth, mud pump imperfect, ship's shaft, Zhangzhou copper sleeve, eccentric shaft sleeve, gear drive shaft, mud pump water seal neck, mud door, skateboard, sand scraper scraper wear coating, etc.
7, chemical
all kinds of containers, reactors, pipes, pumps, valves and sealing parts repair;
8, glass industry
using thermal spray method in the lift roller, conveyor roller surface spray a layer of ceramic, improve the lift roller, transfer roller corrosion resistance to molten glass, inhibit the molten liquid phase of the roller surface attachment, slow down the erosion of molten glass on the roller surface, so that the roller surface for a long time to maintain smooth, reduce the lift roller, conveyor roller repair and maintenance, improve glass quality and production yield, reduce production costs.
9, electrician line
using supersonic flame spraying process in the pull tower wheel, brushing machine, brushing wheel, wire wheel, pull wire cylinder, cable tray, guide groove and other parts surface spray carbon Chemical ceramic coatings enable surface hardness to reach HRc75, far more wear-resistant than abrasive steel or cold hard cast iron, and also enable the substations of these parts to be made of ordinary steel or cast iron, reducing costs and extending service life.
10, municipal
all kinds of steel structures of thermal spray long-lasting protective coating, corrosion, long-lasting anti-corrosion, a protection life of more than 30 years
11, light industry
plastic mold spraying reinforcement repair;