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Effects of Heat Treatment on Mechanical and Tribological Properties of Cobalt-Base Tribaloy Alloys

机译：热处理对钴基Tribaloy合金力学和摩擦学性能的影响

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摘要

Cobalt-base Tribaloy alloys are important wear-resistant materials, especially for high-temperature applications, because of the outstanding properties of the strengthened cobalt solid solution and the hard Laves intermetallic phase that make up the alloys. The Laves intermetallic phase is so abundant (35-70 vol. percent) in these alloys that its presence governs all of the material properties. Heat treatment may alter the volume fraction, the size/shape, and the distribution of the Laves phase in the microstructures as well as the phase and structure of the cobalt solid solution, thus influencing the mechanical and tribological properties of the alloys. In this work, the effects of heat treatment on two cobalt-based Tribaloy alloys, T-400 and T-200, were studied. The former is a well-known Tribaloy alloy, and the latter is a newly developed one. These two alloys were heat treated in different conditions. The phases and microstructures of the alloys before and after the heat treatments were analyzed using x-ray and scanning electron microscopy. The mechanical and tribological properties of the alloys were investigated using a nano-indentation technique and a pin-on-disc tribometer, respectively.
机译：钴基Tribaloy合金是重要的耐磨材料，尤其是在高温应用中，因为增强的钴固溶体和构成合金的坚硬的Laves金属间相具有出色的性能。 Laves金属间相在这些合金中含量很高（35-70％（体积）），以至于其存在决定着所有材料的性能。热处理可能会改变Laves相在微观结构中的体积分数，尺寸/形状和分布，以及钴固溶体的相和结构，从而影响合金的机械和摩擦学性能。在这项工作中，研究了热处理对两种钴基Tribaloy合金T-400和T-200的影响。前者是一种著名的Tribaloy合金，后者是一种新开发的合金。这两种合金在不同条件下进行了热处理。使用X射线和扫描电子显微镜分析了热处理前后合金的相和微观结构。分别使用纳米压痕技术和销钉盘式摩擦计研究了合金的机械和摩擦学性能。

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