In order to improve the friction and wear behavior of Al–Si alloy cylinder liner, the surfaces of cylinder liner samples were prepared by three kinds of surface shaping treatments (chemical etching shaping, mechanical honing shaping, and laser ablation shaping). All the three kinds of surface shaping treatments can expose the silicon particles on the surface of Al–Si alloy cylinder liner, which prevents the contact aluminum from the counterface (piston ring). The area between the two protruding silicon particles can be stored for enhanced lubrication and reduce friction. These shaping surfaces were different. The edges of the silicon particles are made sharp by the chemical etching shaping treatment. The edges of the silicon particles are round but with burr by the mechanical honing shaping treatment. The edges of silicon particles are round but without burr by the laser ablation shaping treatment. The friction coefficient and weight loss are lowest by the laser ablation shaping in three kinds of surface shaping treatments. There are two reasons. On the one hand, the edges of silicon particles are round but without burr, which reduce the stress concentration. On the other hand, the silicon particles combine well with aluminum, which reduce the probability of falling off.

中文翻译：

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表面成形处理制备的铝硅合金缸套摩擦磨损行为

为了改善Al-Si合金气缸套的摩擦磨损性能，采用化学蚀刻成型、机械珩磨成型和激光烧蚀成型3种表面成型处理方法制备了气缸套样品的表面。这三种表面整形处理都可以使Al-Si合金缸套表面的硅颗粒暴露出来，从而防止接触面（活塞环）接触铝。两个突出的硅颗粒之间的区域可以存储以增强润滑并减少摩擦。这些成形表面是不同的。通过化学蚀刻成型处理使硅颗粒的边缘变得锋利。通过机械珩磨成型处理，硅颗粒边缘呈圆形但带有毛刺。通过激光烧蚀整形处理，硅颗粒边缘圆润无毛刺。在三种表面整形处理中，激光烧蚀整形的摩擦系数和重量损失最低。有两个原因。一方面，硅颗粒边缘圆润无毛刺，减少了应力集中。另一方面，硅颗粒与铝结合良好，减少了脱落的可能性。