表面微织构对WC-8Co在往复摩擦磨损中粘结-扩散磨损特性的影响

采用激光表面纹理化在WC-8Co上制备了微沟槽织构，通过往复式摩擦磨损试验对其与Ti6Al4V接触的耐磨性进行分析，并以无表面微沟槽织构的WC-8Co为对比样品，研究了表面微织构对WC-8Co粘结-扩散磨损特性的影响，揭示了摩擦过程中表面微织构的磨损机理. 结果表明：WC-8Co上的微沟槽对摩擦接触面具有抗粘结作用，在高接触载荷下，这种效应更为明显. 织构表面的抗粘结机制是由微沟槽包裹的碎屑产生的. 此外，与无表面微织构的WC-8Co不同，表面织构化的WC-8Co的磨损最初来源于微沟槽边缘的断裂，随后扩展到摩擦表面. 这种磨损特性归因于微沟槽边缘的高热载荷和机械应力集中，以及激光加工过程中WC晶粒长大与摩擦过程中粘结剂Co扩散的协同效应.Micro-groove textures were fabricated on WC-8Co via laser surface texturing. The wear resistance of the textured WC-8Co in contact with Ti6Al4V was analyzed through reciprocating friction and wear tests, with untextured WC-8Co as the control sample. The effect of surface micro-textures on the adhesive-diffusive wear characteristics of WC-8Co was studied, and the wear mechanism of surface micro-textures during the friction process was revealed. The results show that the micro-grooves on WC-8Co have an anti-adhesion effect on the friction contact interface, and this effect is more pronounced under high contact loads. The anti-adhesion mechanism of the textured surface is generated by the debris entrapped within the micro-grooves. In addition, unlike WC-8Co without surface micro-textures, the wear of textured WC-8Co initially originates from the fracture of micro-groove edges, and then spreads to the friction surface. This wear characteristic is attributed to the high thermal load and mechanical stress concentration at the micro-groove edges, as well as the synergistic effect of WC grain growth during laser processing and Co binder diffusion during the friction process.

搜集汇总

背景与挑战

背景概述

该数据集研究了表面微织构对WC-8Co材料在往复摩擦磨损中粘结-扩散磨损特性的影响。实验通过激光制备微沟槽织构，发现微沟槽能有效抗粘结，尤其在高载荷下，其机制是包裹碎屑；磨损则从微沟槽边缘断裂开始，扩展至整个表面，由热载荷、应力集中及材料协同效应导致。