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Comprehensive investigation of the microstructure-property relationship of differently manufactured Co–Cr–C alloys at room and elevated temperature
Wear ( IF 5 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.wear.2019.203138 Julian Krell , Arne Röttger , Werner Theisen
Wear ( IF 5 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.wear.2019.203138 Julian Krell , Arne Röttger , Werner Theisen
Abstract The purpose of this study was to investigate the influence of the microstructure on sliding wear and hardness of four different Co–Cr–C alloys at room and elevated temperature. Different microstructures were produced by applying three different processes. The hardness, hot hardness and wear loss at room temperature of these alloys correlate strongly with the carbide volume content. In sliding wear tests against an Al2O3 ball, abrasive wear occurs at room temperature. The size or geometric arrangement of the carbides or metal matrix plays a minor role at room temperature. At 600 °C the wear behaviour changes due to the softening matrix. In alloys with small free matrix path lengths, the highest wear rates occur due to micro-fatigue and micro-cracking. In hypoeutectic alloys with a high free matrix path length, the carbides lose their effectiveness due to the lack of support by the matrix. In these alloys, wear is dominated by the properties of the matrix. A hypereutectic casting alloy with large primary carbides shows the best wear results, as the carbides support themselves due to their size and retain their wear-reducing effect.
中文翻译:
不同制造的 Co-Cr-C 合金在室温和高温下的微观结构-性能关系的综合研究
摘要 本研究的目的是研究微观结构对四种不同 Co-Cr-C 合金在室温和高温下滑动磨损和硬度的影响。通过应用三种不同的工艺产生不同的微观结构。这些合金在室温下的硬度、热硬度和磨损损失与碳化物体积含量密切相关。在针对 Al2O3 球的滑动磨损试验中,磨料磨损发生在室温下。碳化物或金属基体的尺寸或几何排列在室温下起次要作用。在 600 °C 时,由于软化基体,磨损行为发生了变化。在自由基体路径长度小的合金中,由于微疲劳和微裂纹,磨损率最高。在具有高自由基体路径长度的亚共晶合金中,由于缺乏基体的支持,碳化物失去了它们的效力。在这些合金中,磨损由基体的特性决定。具有大初生碳化物的过共晶铸造合金显示出最好的磨损结果,因为碳化物因其尺寸而支撑自身并保持其减少磨损的效果。
更新日期:2020-03-01
中文翻译:
不同制造的 Co-Cr-C 合金在室温和高温下的微观结构-性能关系的综合研究
摘要 本研究的目的是研究微观结构对四种不同 Co-Cr-C 合金在室温和高温下滑动磨损和硬度的影响。通过应用三种不同的工艺产生不同的微观结构。这些合金在室温下的硬度、热硬度和磨损损失与碳化物体积含量密切相关。在针对 Al2O3 球的滑动磨损试验中,磨料磨损发生在室温下。碳化物或金属基体的尺寸或几何排列在室温下起次要作用。在 600 °C 时,由于软化基体,磨损行为发生了变化。在自由基体路径长度小的合金中,由于微疲劳和微裂纹,磨损率最高。在具有高自由基体路径长度的亚共晶合金中,由于缺乏基体的支持,碳化物失去了它们的效力。在这些合金中,磨损由基体的特性决定。具有大初生碳化物的过共晶铸造合金显示出最好的磨损结果,因为碳化物因其尺寸而支撑自身并保持其减少磨损的效果。