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A wear mechanism map of uncoated high-speed steel (HSS) tools was constructed under the conditions of dry-drilling die-cast magnesium alloys. Three wear mechanisms appear in the map based on the microanalysis of drilled HSS tools by SEM, including adhesive wear, abrasive wear and diffusion wear. In the map, there exists a minor wear region which is called “safety zone”. This wear mechanism map will...
In the present work, Al–Pb alloy was irradiated by high current pulsed electron beam. X-ray diffractometer, electronic probe microanalysis, scanning electron microscopy and Knoop hardness indentation were used to characterize the microstructure and mechanical property of Al–Pb alloy. The results show that the microstructure and mechanical property can be greatly improved. The tribological properties...
Powder compacting process was employed to fabricate nanocrystalline Cu-Zn alloy layer on the surface of coarse-grained copper matrix. The tribological behaviors of nanocrystalline surface layer after annealing in air were investigated. Sliding wear tests were performed on a pin-on-disk test machine under dry conditions. The morphologies and element chemical states of the worn surfaces were examined...
The wear behavior of hot extruded Al–Si–Pb alloys was investigated under dry conditions in a temperature range 25–200°C using a pin-on-disc type wear testing machine. The results show that the microstructure and mechanical properties can be greatly improved and porosity can be significantly decreased by hot extrusion. These factors contribute to great increase in wear resistance of hot extruded Al–Si–Pb...
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