Abstract This investigation reports on the tribomechanical evaluations of a Co-based alloy obtained by the hot isostatic pressing (HIPing) of a blend of two standard gas atomized cobalt alloy powders. A HIPed blend of Stellite 6 and Stellite 20 was used to investigate the effect of varying the C, Cr, and W content simultaneously on the structure-property relationships. Microstructural evaluations involved scanning electron microscopy and x-ray diffraction. Experimental evaluations were conducted using hardness, impact, tensile, abrasive wear and sliding wear tests to develop an understanding of the mechanical and tribological performance of the alloys. Results are discussed in terms of the failure modes for the mechanical tests, and wear mechanisms for the tribological tests. This study indicates that powder blends can be used to design for a desired combination of mechanical strength and wear properties in these HIPed alloys. Specific relationships were observed between the alloy composition and carbide content, hardness, impact energy and wear resistance. There was a linear relationship between the weighted W- and C-content and the carbide fraction. The abrasive wear performance also showed a linear relationship with the weighted alloy composition. The pin-on-disc and ball-on-flat experiments revealed a more complex relationship between the alloy composition and the wear rate.

中文翻译：

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混合钴基合金的滑动磨损

摘要 本研究报告了通过热等静压 (HIPing) 两种标准气体雾化钴合金粉末的混合物获得的 Co 基合金的摩擦力学评估。Stellite 6 和 Stellite 20 的 HIP 混合物用于研究同时改变 C、Cr 和 W 含量对结构-性能关系的影响。微观结构评估包括扫描电子显微镜和 X 射线衍射。使用硬度、冲击、拉伸、磨料磨损和滑动磨损测试进行实验评估，以了解合金的机械和摩擦学性能。结果根据机械测试的失效模式和摩擦学测试的磨损机制进行了讨论。该研究表明，粉末混合物可用于设计这些 HIPed 合金的机械强度和磨损性能的理想组合。观察到合金成分与碳化物含量、硬度、冲击能和耐磨性之间的特定关系。加权 W 和 C 含量与碳化物分数之间存在线性关系。磨粒磨损性能也与加权合金成分呈线性关系。销-盘和球-平面实验揭示了合金成分与磨损率之间更复杂的关系。加权 W 和 C 含量与碳化物分数之间存在线性关系。磨粒磨损性能也与加权合金成分呈线性关系。销-盘和球-平面实验揭示了合金成分与磨损率之间更复杂的关系。加权 W 和 C 含量与碳化物分数之间存在线性关系。磨粒磨损性能也与加权合金成分呈线性关系。销-盘和球-平面实验揭示了合金成分与磨损率之间更复杂的关系。