Spraying area: water conservancy electric power
Work status: gate
Solution: the main anti-corrosion, high speed arc sprayed/subsonic spraying
Coating material: high speed arc sprayed stainless steel 316 l and SX - 601 wire
Use effect: anti-corrosion wear resistance to sulfur corrosion and high temperature oxidation resistance is strong, has good wear resistance, hardness or greater HRC50, temperature 1000 ?, improve corrosion resistant wear resistant 3-8 times longer scouring abrasion resistant, high temperature resistant material, can effectively extend the repair cycle
Application field: water conservancy electric power industry large impeller wear
Coating material is introduced:
The thermal spraying material and coating function and application
A: thermal spraying materials
Has been realized in the practical application in industrial production of coating materials such as metals, alloys and ceramics, mainly used in powder, wire and bar state, including spraying powder for spraying materials more than 70% of the total amount. Used as a coating material are:
1, thermal spraying powder
Pure metal powder: W, Mo, Al, Cu, Ni, Ti, Ta, Nb, etc
Alloy powder: Al - Ni, Ni - Cr, Ti, Ni, Co - Cr - Ni - Cr - Al, W, MCrAlY (M = Co, Ni, Fe), Co, Ni, Fe base metal, etc
Oxide ceramic powder: Al2O3, ZrO2, Cr2O3, TiO2, etc
Carbide powder: WC, TiC, Cr3C2, etc
Metal ceramic powder: WC - Co, Cr3C2, NiCr, etc
Plastic powder: nylon, polyethylene, PPS etc
2, thermal spray wires
Al, Cu and zinc, Sn, Al - zinc alloy, babbitt alloy, stainless steel,
Ni - Al wire, etc.
3, thermal spray bar
Al2O3, ZrO2, Cr2O3, etc
B: coating functions and applications
To achieve high temperature oxidation and hot corrosion resistance coating
For some exposure to high temperature corrosion in the gas components, by high temperature, gas corrosion, and the function of air flow scouring, seriously affected the life and safe operation of the equipment. In addition to high temperature oxidation and hot corrosion resistance of materials must be resistant to high temperature oxidation and corrosion, must also have similar to the substrate material coefficient of thermal expansion, the party won't be caused by local overheat temperature cycle and the coating thermal fatigue performance degradation. Used as high temperature oxidation and hot corrosion resistance of coating material has: NiCr, leicester, MCrAl, MCrAlY (M = Co, Ni, Fe) and Hastiloy and Stellite alloy, etc. This kind of coating of four typical applications such as power plant boiler tubes (water wall tube, reheater and economizer, superheater tube) and water wall of high temperature oxidation corrosion has been electric power, papermaking, chemical industry and other industrial boiler users need to solve the problem, after years of research and practice has proved that the electric arc spraying Ni - Cr, Fe - Cr - Al and Ni - Cr - Al, 45 ct coating can achieve a good protective effect, the service life of up to nine years. MCrAlY coating used in aviation turbine engine blade coating as well as turbine engine combustion chamber, such as flame tube with a thermal barrier coating bonding layer.
Outdoor site construction
Professional construction of the thermal spray coating (application) in electric power industry
Scope of application:
1, coal-fired power plant boiler water wall tube, superheater tubes, reheater tube, coal saving (or oil), hereinafter referred to as the boiler "four tubes" spraying anti-corrosion wear-resistant coating;
2, power plant steam turbine cylinder head spray surface leakage repair; A generator rotor shaft neck wear, strain of brush plating, thermal spray repair
3, suction, exhaust fan impeller coal-fired power plants and coal mill system spray welding repair and surface strengthening; Surface cavitation of turbine casing thermal spraying, brush plating to repair
4, hydraulic turbine flow area, gate shell in the guide, drainage decompression tube, the runner and guide vane ring, cover etc. Spray welding layer of resistance to cavitation erosion;
5, diesel generator crankshaft wear after repair; All kinds of fan impeller, all kinds of electric machinery and equipment wear and corrosion of the surface of the repair and reinforcement
6, wind power base in the coating. 7, desulfurized flue SO2 erosion resistance of the thermal spraying coating construction, desulfurization tower green engineering construction.
Work to abrasion and grain coating
Heat resistant erosion coatings
Erosion resistant coating
Corrosion resistant coating
Spraying materials: ceramics, metal, metal oxide ceramic coatings, 45 ct high cr-ni iron chromium aluminum coating, etc.
Spraying methods: high-speed high supersonic flame spraying, arc spraying, plasma spraying, and so on
Applications: the boiler "four tubes" (water wall tube, overheating organ, preheater tube and gas cylinder), boiler exhaust fan blades, hydraulic piston rod sealing ring, coal mill system, turbine blades, leaf guide water, sea water pump impeller and turbine runner, the fan impeller, etc.
Equipment is recommended
Solution: the main anti-corrosion, (high) wrapping speed arc sprayed/subsonic spraying
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| arc spraying equipment | Subsonic spraying equipment |
1.Speeding electric arc spraying processing materials include: 1. Spraying line wire stainless steel, zinc, aluminum, copper, lead, molybdenum, babbitt and so on all sorts of function coating.
2. The subsonic flame spraying powder + spray wire one machine amphibious spray system equipment can spray materials include: chrome nickel chrome carbide, tungsten carbide composite powder, aluminum oxide, titanium oxide ceramic powder preparation of ideal spray coating/wire: including T8, MO (MO) low carbon steel, stainless steel, copper, AL203, AL (aluminum), zinc (Zn)
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