About aluminum alloy engine cylinder

Wherein the cylinder piston is guided for linear reciprocating motion of the cylindrical metal parts. The working fluid through the expansion cylinder of the engine the thermal energy into mechanical energy; compressed gas receiving increasing the pressure in the piston cylinder of the compressor. Turbine engines, rotary piston housing. Applications cylinder: print (tension control), semiconductors (spot welding, grinding chips), automation and control, robotics, and so on.
A cylinder made of aluminum alloy material than the material alloy to make good the cylinder within the cylinder when the engine operating temperature of up to thousands of degrees, iron and oxygen at high temperatures are easily oxidized, the life of the engine is very short, and Aluminum alloy engine cylinder different generates alumina aluminum cylinder is well protected from oxidation. As for the problem of high temperature, the engine cooling system there, do not worry about this. Now mostly aluminum cylinder car cylinder, cylinder external cast iron to ensure its strength.
In the automotive industry, to replace cast aluminum engine has become a mainstream trend. Aluminum is light weight, high strength, easy molding, thermal conductivity and thermal expansion and low, the engine uses aluminum can reduce vehicle weight, thereby reducing fuel consumption, improving engine efficiency and driving performance cars. But aluminum cylinder surface as low hardness, poor wear resistance and corrosion resistance, the most commonly used method is studded cast aluminum cylinder liners, not only increases the manufacturing costs and the difficulty of processing, and cylinder liner and piston different coefficients of expansion, causing the engine to run in process with the cylinder gap is too large, while the power drop caused by bad seal.
Nikasil cylinder performance is also good. Silicon carbide is a very hard ceramic (harder than steel), may be dissolved in the nickel. Nickel solution can then be electroplated onto an aluminum cylinder bore. The piston ring is then rubbed off the exposed nickel, leaving a very hard layer of silicon carbide to protect the aluminum from the contact with the aluminum cylinder piston. With this setting, the engine can be closer tolerances to get better performance. After the cylinder must be re-plated on another boring, but Nikasil is very durable, so the cylinder does not need to be as much iron or chromium cylinder rework. Nikasil coated aluminum cylinder and piston wear and low friction, Nikasil cylinder bore allowing very large and tight tolerances, so that the existing engine design can be easily extended. Aluminum cylinders also gave a better thermal conductivity than cast iron liners, for a high-output engine is an important attribute.
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