Influence of Belt Furnaces on Engine Valve Heat Treatment
The working conditions of engine valves are severe. Besides high temperature, valve also experiences cyclic loading. A valve can open and close dozens of times per second. Because of the high working temperature and strength required in such conditions, heat resistant steels are often used. Besides proper material selection, proper heat treatment is essential in manufacturing high performance engine valves. It is vital to create the desired properties like strength, wear resistance, toughness, fatigue strength, hardness and microstructure.
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