内燃机铝活塞环槽的磨损直接影响其使用性能及寿命,所以目前国内外普遍重视强化环槽的工艺研究。除了已被广泛采用的镶奥氏体铸铁环外,正在研究开发的还有:离子喷涂、镶烧结环、陶瓷纤维或陶瓷颗粒复合浇注等强化工艺。本文在实验基础上对等离子喷涂工艺的试验应用作简要介绍和评估。1.涂层材料选择和涂层设计为使涂层与基体结合良好,减少涂层内应力,涂层应分为粘结层、过渡层和工作层。粘结层的线胀系数应尽可能与基体相一致。对于铝硅合金,选用镍铝青铜较为理想。过渡层的作用是减少内应力,原则上采用粘结层与工作层的混合粉末,但在喷涂过程中需逐渐 Internal combustion engine aluminum piston ring groove wear directly affects the performance and life expectancy, so the current emphasis at home and abroad to strengthen the ring groove technology research. In addition to the widely used austenitic cast iron rings, research and development are also underway: ion spray coating, sintered ring, ceramic fiber or ceramic particle compound casting and other strengthening processes. In this paper, based on the experiment of plasma spraying process test application brief introduction and evaluation. 1. Coating material selection and coating design In order to make the coating and the substrate combine well to reduce the stress in the coating, the coating should be divided into the adhesive layer, the transition layer and the working layer. The linear expansion coefficient of the adhesive layer should be consistent with the matrix as much as possible. For aluminum-silicon alloy, the choice of nickel-aluminum bronze is ideal. The role of the transition layer is to reduce the internal stress, in principle, the bonding layer and the working layer of mixed powder, but in the spraying process need to gradually