Tribological Properties of AW/EP Additives Under Different Thermal Conditions

The authors have investigated the action of compositions containing AW/EP additives under scuffing conditions and the influence of temperature on the wear of friction elements lubricated with selected compositions. It has been stated that postponing of scuffing initiation is not always sufficient to obtain very good strength of the surface layer and decreased wear. Furthermore, the results show the influence of temperature and load on the additive action. Extreme friction conditions result in greater wear intensity and change in the lubricating action of additives.     

Tribological behaviour of S‐esters and amine salts of the O,O‐polybutoxyglycol diester of dithiophosphoric acid in mineral oil solution

The tribological properties of derivatives of the polyalkoxyglycol esters of dithiophosphoric acid were tested using four‐ball and ball‐on‐disc machines. Polybutoxyglycol dithiophosphoric acid derivatives were found to be effective load‐carrying additives in mineral base oil. Four‐ball and ball‐on‐disc data of some of these additives showed them to have very good antiwear/extreme‐pressure and antifriction properties. These properties were dependent upon the additive's chemical nature, concentration, sliding speed, and load. The presence of polybutoxy groups decreased the concentration of phosphorus in the additive in comparison to zinc dialkyldithiophosphates.     

硫、磷系添加剂对菜子油生物降解性能影响的研究

以精制菜子油为基础油，考察了几种硫化脂肪添加剂和磷系添加剂对其生物降解性能的影响。试验结果表明，菜子油中加入添加剂后会对其生物降解性能产生影响。添加剂的种类不同，对菜子油的生物降解性能的影响也不相同。所添加的几种添加剂都不同程度地降低了菜子油的生物降解性能，但降幅不大，其生物降解率仍在95％以上。硫、磷系极压抗磨添加剂配伍对菜子油生物降解性能有一定的影响。其中RC2317与P120配伍对菜子油的生物降解性影响不大，而RC2526和RC2540与P120配伍，则使菜子油的生物降解率下降很大。     

硫、磷系添加剂复合使用在菜籽油中的抗磨性能研究

以菜籽油为基础油,在四球摩擦磨损实验机上分别考察丁两组硫系和磷系添加剂T321与T304、T321与T307复合使用对菜籽油的抗磨性和极压性的影响。结果表明,在菜籽油叶：加入添加剂T321与T304能更好地提高菜籽油的抗磨性能和极压性能。     

含硫极压抗磨添加剂在菜籽油中的摩擦学性能研究

利用四球磨损试验机考察了以硫化异丁烯和硫化棉籽油作为菜籽油极压抗磨添加剂时的摩擦学性能,通过测定2种添加剂在不同含量下的最大无卡咬负荷(pB)和不同条件下的磨斑直径(WSD),分析和研究了载荷、摩擦时间、添加剂含量对菜籽油摩擦学性能的影响。试验结果表明:硫化异丁烯可以明显提高菜籽油的承载能力和抗磨性能,硫化棉籽油对提高菜籽油的承载能力和抗磨性能效果不明显,硫化异丁烯在菜籽油中的承载能力和抗磨性能明显优于硫化棉籽油。试验还表明添加剂的含量并非越高越好,否则WSD值将增大。     

The properties of various antiwear and extreme‐pressure additives in pentaerythritol ester

The tribological properties of three representative antiwear and extreme‐pressure additives, tricresylphosphate (TCP), triphenylthiophosphate (TPPT), and α‐mercaptobenzothiazole (MBT), in pentaerythritol ester at different concentrations were studied. It was found that TCP could react with Fe to form an organic phosphate film containing 4% P on the scar surface, while TPPT formed a blended organic phosphate and inorganic FeS film, containing 4% P and 6% S, respectively. MBT formed an inorganic FeS film containing 45% S. Ferrographic analyses of wear particles collected from oil samples after four‐ball tests showed that the higher the temperature the better the tribological performance of the additivated ester, due to its reaction with the metal surface.     

射频/直流磁控溅射不锈钢/Al_2O_3复合薄膜组织与性能研究

利用射频 /直流磁控溅射法 ,制备了 31 6L不锈钢 /Al2 O3 陶瓷复合薄膜 ,研究了 31 6L不锈钢 /Al2 O3 陶瓷复合膜的组织形貌 ,测试了薄膜的显微硬度和耐磨性。结果表明 :直流磁控溅射 31 6L不锈钢薄膜呈柱状晶结构 ,主要有 Fe- Cr和γ- Fe相构成 ,在 Fe- Cr( 1 1 0 )晶面出现明显的择优取向 ;由于射频溅射 Al2 O3 陶瓷的掺合 ,使 31 6L不锈钢 /Al2 O3 陶瓷复合薄膜柱状晶细化 ,并出现二次柱状晶 ,在 Fe- Cr( 2 1 1 )晶面出现明显的择优取向 ,31 6L不锈钢膜硬度明显高于 31 6L块体 ,掺合了 Al2 O3 的金属 /陶瓷复合薄膜耐磨性有显著的提高。