Plasma-sprayed zirconia auto parts and brake discs
Plasma-sprayed zirconia auto parts and brake discs
Function:
Repair parts: all kinds of automobile mold engine cylinder block (tile seat and other parts) crankshaft hydraulic equipment gear roller cylinder connecting rod (inner hole) differential (shaft) and so on
Damage types and characteristics of parts
1. Type of mechanical damage
Wear: abrasive wear, adhesive wear, surface fatigue wear and corrosion wear
Variation: elastic variation, plastic variation
Fracture: brittle fracture, fatigue fracture
2. Corrosion and cavitation:
Chemical corrosion, electrochemical corrosion
Other injuries:
Aging, breakdown, cracking, scraping
Coating processes, equipment and materials for automotive parts
|
| Component Name | Base material | Coating material | Spraying process | Function |
| 1 | Aluminium alloy valve tappet | Aluminum alloy | Fe-0.8 % | SX-600 Arc spraying equipment | Reduce mass/friction and resist sassafras |
| 2 | Engine block | AL-Si alloy | Aluminum alloy | Sx-88 plasma spraying equipment | Reduce mass/friction and resist sassafras |
| 3 | Turbocharger shell | Aluminum alloy | Antiwear coating | Sx-88 plasma spraying equipment | Wear resistance, improve work efficiency |
| 4 | Synchronous ring | steel | AL-Si + 50% Mo | Sx-88 plasma spraying equipment | anti-wear |
| 5 | Piston ring | Alloy steel, cast iron, stainless steel | Cr3 C2 +20% N iCr | HVOF SX-8000 supersonic flame spraying | Instead of Cr plating layer |
| 6 | The brake disc | steel | zirconia | Sx-88 plasma spraying equipment | Wear resistance, high heat insulation |
| 7 | Distributor rotor | steel | Al 2 O2 +Ti O2 | Sx-88 plasma spraying equipment | Low noise, low cost |
| 8 | Rotational distance sensor | Aluminum alloy | Fe 304 | Sx-88 plasma spraying equipment | Magnetic sensing material |
| 9 | Oxygen sensor | Platinum + zirconia | Al 2 O2 +MgO | Sx-88 plasma spraying equipment | Protection probe/environmental protection |
| 10 | The exhaust pipe | steel | Professional smoke hood wire material | SX-600 Arc spraying equipment | High temperature smoke corrosion resistance |
| 11 | The exhaust valve | steel | Co Cr W B Si | Plasma spray welding | High temperature smoke corrosion resistance |
Car model or shoe mold:
Process: scan type shoes -- carving wood model -- do TuMo agent -- spray -- demoulding -- water
Features:
1, one tenth of the price
2. Short cycle
3. three to five days to complete the mold
4. The new has a way out
5, car mold is called polyurethane
6. Wood model is better
Punching parts line, suitable for:
1, polyurethane mold
2, injection mold
3, the amount of small, hundreds of can be rough shoes,
Application of thermal spraying in automobile manufacturing:
In order to improve the performance of motor to reduce the energy consumption of the car right at the request of environmental protection thermal spraying technology in automobile manufacturing industry has a larger development, because of the large automobile industry belongs to the industrialized production, with a mature technology tend to form the batch of products are: synchronizing rings, piston ring, engine valve tappet, oxygen sensor probe and other parts of the thermal spraying.
At present, non-traditional functional coatings, such as high thermal insulation coating, low noise coating, magnetic sensing coating, high-precision corrosion resistance coating, chromium coating, have a good application prospect.
Plasma spraying technology has a strong vitality in automobile manufacturing, and its automation, intelligence, high precision, high efficiency, the reason is suitable for automobile parts production of large quantities, low cost, high quality requirements. Will produce huge economic and social benefits
Coating can be divided into:
(1).. Abrasion resistance coating: including adhesion resistance, surface fatigue wear and erosion resistance coating. There are low temperature wear resistance less than 538℃ and high temperature 538-843℃ wear coating.
(2) anti-corrosion coating: depends on the corrosion environment, the change of the corrosion medium, produce different nature of corrosion damage degree. Such as atmospheric (industrial urban and rural Marine) environment corrosion, chemical medium (gas, molten liquid) corrosion, according to the specific working conditions (medium, temperature, concentration, pressure, etc.) select the appropriate coating material for protection.
③ Thermal barrier coating: Thermal barrier coating (TBC) is one of the key technologies of modern aeroengine. It can isolate the hot parts of the jet engine and gas turbine from the hot gas, reduce the surface temperature of the metal parts, and keep the turbine blade or other hot end parts from the gas corrosion and erosion.
④. Conductive, isolated coating: This coating is used for conductivity, resistance, shielding and insulation applications.
⑤.Abrasion sealing coating: the coating has cermet coating (below 800℃) and ceramic coating (above 1000℃) for mechanical parts clearance control, high temperature sealing with abrasion.
6. Biological functional coating: Plasma spraying hydroxyapatite (Ca 5 PO4 3OH) coating or fluorophosphorous lime and other bioceramics on stainless steel or titanium metal matrix can effectively overcome the incompatibility of metal artificial skeleton and biological tissue and the problems of body fluid corrosion.
7. Thermal radiation energy saving coating: - including low temperature, medium temperature heating, far infrared heating coating with some ceramic materials and ceramic composite materials or ceramic composite materials have the characteristics of the high rate of thermal radiation, to strengthen the heating element or furnace and the heat exchange between the strength and speed of workpiece, the realization of the aim of high efficiency and energy saving has been hailed as a "milestone" industrial furnace technology development.
