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首页> 外文期刊>鋳造工学 >Influences of graphite shapes on wear and fatigue characteristics of austempered cast iron under slip-rolling contact
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Influences of graphite shapes on wear and fatigue characteristics of austempered cast iron under slip-rolling contact

机译：石墨形状对滑移接触下奥氏体铸铁磨损和疲劳特性的影响

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摘要

Dry slip-rolling contact wear testing and wet slip-rolling contact fatigue testing of several austempered cast ironswith various graphite shapes were performed using a Nishihara-type testing machine, and the influences of the graphite shape onthe wear and fatigue characteristics of cast iron wereinvestigated. Changing graphite shape from spheroidal to flakewas found to result in increasing wear loss in both dry and wetconditions. The lower the graphite nodularity is, the earlier alarge amount of wear loss takes place. This is because a lowergraphite nodularity results in a shorter average matrix distancebetween graphites and also a larger stress concentration factor atgraphite tips. The pitting phenomenon is easier to occur insamples with a lower graphite nodularity.
机译：使用Nishihara型试验机对几种石墨形状的奥氏体铸铁进行干滑接触磨损试验和湿滑接触疲劳试验，并研究了石墨形状对铸铁磨损和疲劳特性的影响。发现将石墨形状从球形改变为薄片状会导致在干燥和潮湿条件下磨损量增加。石墨球状度越低，越早发生大量的磨损损失。这是因为较低的石墨球状度导致石墨之间的平均基体距离更短，并且石墨集中点的应力集中系数也更大。在石墨球度较低的样品中更容易发生点蚀现象。

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