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Wear Mechanisms at High Temperatures. Part 3: Changes of the Wear Mechanism in the Continuous Impact Abrasion Test with Increasing Testing Temperature

机译:高温下的磨损机理。第3部分:随着测试温度的升高,连续冲击磨损测试中磨损机理的变化

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The aim of the present work is to find the critical temperature for different alloys and show how the wear mechanisms change depending on different micro-structure once the critical temperature is exceeded. It was found that below 800℃ some materials change their wear behaviour gradually with temperature, and some materials have a critical temperature above which the behaviour changes significantly. It was found that the gradual changes seem to be correlated to the hot hardness of the material. When the changes become significant, it is often due to a change in the wear mechanism, as, e.g. when the matrix gets too soft to support the carbides, and thus breaking of the carbides becomes the dominant wear mechanism or by reaching a critical oxidation temperature above which oxidation causes the material to fail.
机译:本工作的目的是找到不同合金的临界温度,并显示一旦超过临界温度,磨损机理如何根据不同的微观结构而变化。发现在800℃以下,某些材料的磨损行为会随温度逐渐变化,而某些材料的临界温度在该温度以上时,其行为会发生明显变化。已经发现,逐渐变化似乎与材料的热硬度有关。当变化变得显着时,通常是由于磨损机制的变化,例如由于当基体变得太软而无法支撑碳化物时,碳化物的断裂将成为主要的磨损机理,或者达到临界氧化温度,在该温度以上氧化会导致材料失效。

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