电镀的Ag,Cu,Zn层在边界润滑状态下摩擦学性能

Tribological Properties of Coatings Electroplated with Ag, Cu or Zn Under Boundary Lubrication Conditions

在GCr15钢球上电镀软金属 Ag,Cu,Zn 层,在32~# 机械油的边界润滑状态下,其上、下球镀层分别是无镀层抗胶合能力的 9.84,5.4,4.0倍。经过 40 min低载荷运转证明,镀层可有效地减少基体的磨损,而且磨痕面光滑。测定了在一定载荷范围内的摩擦系数。镀 Ag 层的摩擦系数较低,其值稳定在0.05左右;镀Cu层摩擦系数值稳定在0.055左右。对镀液的性质、镀层的厚度进行了相应的探讨。对试验结果及现象做了一定的分析。

The tribological properties of coatings electroplated with such soft metals as Ag. Cu or Zn on CCr15 steel baits were researched on a SQ-3 Four-Ball test machine under the conditions of boundary lubrication with 32# mobile oil used. The scoring resistances of upper and lower balls electroplated with Ag. Cu or Zn are found 9. 84, 5. 4 and 4. 0 times as high as those of non-electroplated balls, respectively. After low-load running for 40 minutes, it was proved that the electroplated coatings can efficiently reduce the abrasion wear on substrate with a smooth surface worn off. Friction coefficients were measured with a certain range of loads applied to i. e. the friction coefficient of Ag-electroplated coating is relatively small and its stable value is about 0. 05. while of Cu-electroplated coating is about 0. 055. properties of electroplating solution and coating thickness were properly discussed with experimental results and some findings taken into account.