【摘要】 用XRD定量法分析了W的共沉积对Ni-P基合金镀层热处理晶化程度、晶粒尺寸的影响,通过镀层硬度测试、干摩擦条件下的磨损实验以及SEM形貌观察研究了镀层的磨损行为。结果表明:W的共沉积提高了镀态和热处理的Ni-W-P镀层的晶化程度,加速Ni相的晶化过程,提高了Ni3P相的晶化反应温度,并使Ni-W-P镀层硬度大于Ni-P镀层的硬度。非晶态Ni-9.27%P镀层晶化前后的磨损行为主要表现为粘着磨损;当P含量与其相同(相近)时,W的加入不改变Ni-5.13%W-9.32%P合金在镀态及低温热处理时的粘着磨损行为,但对高温(600℃以上)热处理镀层起主导作用的磨损形式为微切削磨损机制。更多还原

【Abstract】 The effects of addition of tungsten in Ni-P coating on behavior of annealing crystallization and grain size of the coating were examined by XRD method.Wear behaviour of the coatings were investigated by means of measurement of microhardness,wear test under unlubrication friction and SEM.The results indicate that the addition of tungsten increases the nanocrystallization degree of the as-plated and annealed Ni-W-P coatings,promotes the process of crystallization of Ni phase,and enhances the crystallization reaction temperature of Ni3 P phase and the hardness of Ni-W-P coating compared to that of Ni-P coating.Adhesive wear dominates in the wear process for as-plated and annealed Ni-9.27% P coating.The addition of tungsten Ni-W-P doesn’t change the wear behaviour of Ni-5.13% W-9.32% P coating in the as-plated and low-temperature-annealed conditions,however,the micro-cutting wear becomes the main wear wechanism of the coating annealed at high temperature(above 600℃).更多还原