ISSN   1004-0595

CN  62-1224/O4

高级检索

不同摩擦配副在氯苯甲基硅油润滑工况下的摩擦学行为及机理

Tribological Behavior and Mechanical Study of Different Tribo-pairs using Chlorophenylmethyl Silicone Oil Lubricant

  • 摘要: 随着高端装备性能指标的提高,其核心传动部件的工作温度逼近300 ℃,常规润滑油无法提供长时间的高温润滑. 氯苯甲基硅油(CPSO)作为改性硅油,具有优异的黏温特性,能够在300 ℃下长时润滑. 本文中选取4种典型轴承钢材料(GCr15、M50、40Cr15Mo2VN和CSS-42L)与M50钢球和Si3N4陶瓷球构建2类摩擦副体系,并通过SRV-4高温摩擦磨损试验机研究不同摩擦配副在CPSO下的摩擦行为及机理. 试验结果显示,钢-钢配副的摩擦系数波动大(0.1~0.4),磨损率较低10−7 mm3/(N·m),且磨损率随温度升高逐渐增大;而混合陶瓷配副的摩擦系数稳定,磨损率高10−6 mm3/(N·m),并且磨损率在Si3N4/GCr15和Si3N4/M50配副下,300 ℃下较250 ℃分别降低4.14%和48.80%. 通过XPS对磨斑区域分析表明,这是因为CPSO润滑下钢-钢配副生成的摩擦反应膜的主要成分是Fe2O3氧化膜,而混合陶瓷配副在磨损界面形成的是低剪切FeCl2摩擦化学膜,有效隔离摩擦副的直接接触,进而降低体系的磨损.

     

    Abstract: With the increasing performance demands of high-end equipment, the operating temperature of core transmission components has reached up to 300 ℃, rendering conventional lubricating oils inadequate for long-term high-temperature lubrication. Chlorophenylmethyl silicone oil (CPSO), a modified silicone oil, demonstrates excellent viscosity-temperature properties, enabling effective lubrication at 300 ℃ over extended periods. This study selected four typical bearing steel materials (GCr15, M50, 40Cr15Mo2VN, CSS-42L), paired with M50 steel balls and Si3N4 ceramic balls, to construct two types of tribo-pair systems. The tribological behavior and mechanisms of tribo-pairs under CPSO lubrication were investigated using an SRV-4 high-temperature tribological tester. The results showed that the friction coefficient of steel-steel pairs fluctuated more (0.1~0.4) than that of ceramic-steel pairs. Although the wear rate of steel-steel pairs was lower, it increased with temperature, whereas the wear rate of hybrid ceramic pairs showed different trends as the temperature rose. Specifically, the wear rates of GCr15 and M50 steel decreased by 4.14% and 48.80%, respectively, at 300 ℃ compared to 250 ℃. XPS analysis of the wear scars revealed that this difference was attributed to the tribofilm formed on steel-steel pairs under CPSO lubrication, which consisted of Fe2O3. In contrast, the ceramic-steel pairs formed a low-shear FeCl2 tribofilm on the wear interface, which had better wear resistance and effectively isolated direct contact between the tribo-pairs, thus reducing the system’s friction coefficient and wear.

     

/

返回文章
返回