为了改善干摩擦条件下GCr15/Si3N4摩擦副的摩擦磨损, 在GCr15表面加工激光复合织构, 研究摩擦副的摩擦磨损行为。采用Nd: YAG激光器在GCr15表面加工不同间距织构, 并在织构凹槽中填充树脂基复合材料; 采用销-盘摩擦磨损试验机测试摩擦副的摩擦磨损性能, 并对摩擦副表面形貌和磨屑特征进行观测分析。试验发现, 在试验范围内, 织构间距为1.0 mm, 填充润滑剂为PTFE, 填充比例为20%时, 试件表面有大面积润滑剂黏着, 可形成润滑膜, 摩擦系数较低, 耐磨性较好。干摩擦条件下, 复合织构试件摩擦系数为0.131, 接近金属与自润滑材料的摩擦系数, 对摩球磨斑为Ф 421.7 μm, 试件表面磨痕宽425.7 μm。相比无织构试件, 激光复合织构在干摩擦条件下可有效改善摩擦配副摩擦磨损性能。

In order to improve the friction and wear behavior of the GCr15/Si3N4 friction pair under dry friction, hybrid laser texture was processed on the surface of GCr15, and the friction and wear behavior of the friction pair were studied. The Nd: YAG laser was used to process different groove textures on the GCr15 surface, and the resin-base composite material was filled in the textured grooves. The friction and wear properties of the friction pair were tested by a pin-disk friction and wear tester, and the surface morphology and wear debris characteristics of friction pairs were observed and analyzed. The test found that within the scope of the test, with texture spacing of 1.0 mm, filling lubricant of PTFE and filing ratio of 20%, a large area of lubricant adhered to the surface of the test piece to form a lubricating film, which resulted in lower friction coefficient and better wear resistance. Under dry friction condition, the friction coefficient of the hybrid textured specimens is 0.131, which is close to the friction coefficient between the metal and the self-lubricating material. The wear scar on ball is 421.7 μm and the width of wear scar on disc is 425.7 μm. The hybrid laser surface texture can effectively improve the friction and wear properties of the friction pair under dry friction conditions.