ABSTRACT Thermochemical treatments like plasma nitriding or surface carburizing are commonly used to enhance surface hardness of steel components. An important difference between these treatments is the temperature at which they are carried out. In the present paper, the surface carburizing was carried out following a recently reported non-isothermal low pressure carburizing (LPC) treatment. In order to gain a comparative view of the effect of different treatments on the microstructure, microhardness, fatigue and impact properties, materials with distinct hardenability and widely used in the industrial production were evaluated. Tests were also carried out using industrially processed components aimed to an application demanding high wear resistance. The microstructural evolution during case hardening was studied by optical and electron microscopy.

中文翻译：

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低压渗碳和等离子渗氮对低合金烧结钢力学性能和疲劳寿命极限的影响

摘要 等离子渗氮或表面渗碳等热化学处理通常用于提高钢部件的表面硬度。这些处理之间的一个重要区别是进行它们的温度。在本文中，表面渗碳是在最近报道的非等温低压渗碳 (LPC) 处理之后进行的。为了比较不同处理对显微组织、显微硬度、疲劳和冲击性能的影响，对具有明显淬透性并广泛用于工业生产的材料进行了评估。还使用工业加工部件进行了测试，旨在要求高耐磨性的应用。通过光学和电子显微镜研究表面硬化过程中的微观结构演变。