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Experimental study on wear failure course of gas-valve/valve-seat in engine

机译:发动机气门/气门座磨损失效过程的实验研究

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摘要

The wear failure course of gas-valve/valve-seat in engine was investigated with a simulating tester. The results show that the failure of the contact conical surface is mainly caused by the elastic and plastic deformation and the fatigue micro-crack and spalling. The creep-deformation and corrosion atmosphere accelerated wear failure course at the high temperature. The wear failure course of the gas-valve/valve-seat in engine follows general wear rules of mechanical elements, but the rate of wear in the sharp wear stage is faster.
机译:用模拟测试仪研究了发动机气门/气门座的磨损过程。结果表明,接触锥面的破坏主要是由于弹性和塑性变形以及疲劳微裂纹和剥落引起的。高温下的蠕变变形和腐蚀气氛加速了磨损失效过程。发动机中气门/气门座的磨损失效过程遵循机械元件的一般磨损规则,但急剧磨损阶段的磨损速度更快。

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