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Valve push rod heat treatment - using carburisation, reheating, oil quenching and tempering of partially machined steel rod contg. carbide promoting alloy elements
Valve push rod heat treatment - using carburisation, reheating, oil quenching and tempering of partially machined steel rod contg. carbide promoting alloy elements
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机译:阀门推杆热处理-使用渗碳,再加热,油淬和对部分加工的钢棒进行回火。碳化物促进合金元素
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摘要
The part of the valve push rod which is in contact with the cam requires a very hard surface to witstand the wear due to friction. This is achieved by using a steel containing elements such as chromium, molybdenum, vanadium tungsten and niobium, which promote carbide formation. The total of these elements amounts to a minimum of 1.25%. The partly machined components are carburised for 12 hours at 920 deg.C. and then cooled. This is followed by re-heating to 900 deg.C. and quenching in oil at 80 deg.C. The parts are then tempered for one our at 160 deg.C. This treatment produces a hardness after final grinding of 65 Rockwell.
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