Study on structure of low temperature nitriding layer and property of spiral spring : Li, Y.L., Cui, Z.D. and Wu, B.M. Heat Treat, Met. (China) (Sept. 1994) 205 (9), 17–21 (in Chinese)
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文摘
The processes of low-temperature ionitriding and gas nitrocarburizing for spiral springs have been studied. The spiral springs were made of 50CrVA steel wire and were heated by electric contact and quenched continuously by passing through oil; thereafter they were tempered on the same production line. The structures of the nitriding layer and the fatigue properties were observed and analysed. The results proved that the fatigue life of the springs was increased. A shearing fatigue model of the surface strengthening spring is suggested.