讨论气门弹簧钢丝的疲劳强度、寿命预测及其影响因素。
The paper deals with the fatigue strength, lifetime prediction and its influences of the valve spring steel wires.
气门座要获得高的使用寿命就必须对其上、下倒角和工作面进行适当的修整。
Up chamfer, down chamfer and working face must be correctly dressed so that the valve seat can acquire a longer service life.
本文运用电子扫描、金相分析、硬度测量等方法对气门阀热镦模的早裂进行了失效分析，探讨了模具的失效机理，提出了改善模具质量、提高模具使用寿命的途径。
In this paper, the failure of hot-work valve die is analysed with SEM, optical microscope and hardometer. The crack mechanism is explained and some methods are presented to prolong the die-durability.
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