Intake and Exhaust Valve are car spare parts of the gas distribution system on a car engine. Valve has the shape of a mushroom. The intake valve is responsible for sealing the combustion chamber and bringing the air-fuel mixture or just air into the engine’s combustion chamber. The exhaust valve is also responsible for sealing the combustion chamber and is responsible for releasing the exhaust gas of the engine after combustion.

Working conditions of automobile engine valve:

– Valve must work in a high pressure environment and the highest temperature is in the exhaust valve. For example: in gasoline engine the working temperature of the valve is about 800℃ to 850℃, in diesel engine it is about 700℃ to 900℃.

– Strong impact resistance when the valve closes so it is easy to deform. Resistant to chemical corrosion due to exposure to combustible gases. Difficult lubrication and cooling conditions.

– Because of working in the above difficult conditions, the materials used to make the rubber must also have special properties such as durability, high temperature resistance. The material for making the valve is usually chromium alloy or nickel alloy.

In the harsh working environment of both high temperature, high pressure, and working in a strong impact environment, the valve tends to corrode after a long time of operation.

Laser Cladding for coating a hard alloy layer is the solution to ensure both durability and high accuracy.