金属自修复添加剂浓度对铸铁-铸铁摩擦副摩擦磨损性能的影响

Influence of the Self-repairing Additive Concentration on Tribology Properties of Cast Iron/cast Iron Friction Pair

在MMU–5G材料端面摩擦磨损试验机上,研究了自修复添加剂浓度对铸铁–铸铁摩擦副的摩擦磨损特性的影响,考察了铸铁摩擦表面自修复膜的形成情况,借助SEM和EDS分析了摩擦副的表面形貌和成分。试验结果表明:添加剂浓度对铸铁–铸铁摩擦副摩擦磨损性能影响显著,试验中3%添加剂油样对HT200/HT200摩擦副的减摩和抗磨效果最好;铸铁–铸铁摩擦副在自修复添加剂作用下对磨时,试样表面无自修复保护膜生成,研究认为铸铁的金相组织和机械性能是导致自修复膜无法产生的根本原因,但添加剂颗粒物理作用对铸铁的减摩和耐磨效应显著。

The influence of a self-repairing lubrication additive with different concentration on the tribological properties of cast iron/cast iron friction pair was investigated on MMU-5G wear testing machine. The formation of self-repairing layer was examined by SEM and EDX. The results indicated that the concentration of additive showed a great influence on the tribological properties. The lubricating oil with 3% additive gave the best effect on antifriction and antiwear of cast iron -cast iron friction pair.In the self-repairing Additive, the Self-repair coatings are not formed on the cast-iron worn surface, study considers that metallographic structure and mechanical performance of cast iron are the prime causation resulting in no Self-repair coatings.The self-repairing Additive has remarkable effect on antifriction and wearing of cast iron.