润滑油添加剂羟基硅酸镁/二硫化钼含量对镀铬钢球-灰铸铁摩擦副摩擦学行为的影响  

Effect of the content of magnesium silicate hydroxide/supramoly in lubricant on tribological behavior of chromium-plated steel ball-grey cast iron friction pair

作　　者：金洋 张鹏 曾大海 王启伟 涂小慧 陈德馨 JIN Yang;ZHANG Peng;ZENG Dahai;WANG Qiwei;TU Xiaohui;CHEN Dexin(Guangdong Provincial Engineering&Technology Research Center for Corrosion Resistant Materials,Wear and Corrosion Resistant Technology,Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Guangzhou 510632,China)

机构地区：[1]暨南大学先进耐磨蚀及功能材料研究院,广东省耐蚀材料与抗磨蚀工程技术研究中心,广东广州510632

出　　处：《电镀与涂饰》2024年第2期62-68,共7页Electroplating & Finishing

基　　金：国家自然科学基金(52105186);广东省重点领域研发计划(2023B0909020002)。

摘　　要：[目的]内燃机活塞环服役环境恶劣,需要良好的润滑条件来改善其磨损情况。[方法]在2Cr13钢球上电镀硬铬,分析了硬铬镀层的微观形貌、显微硬度和厚度。以镀铬钢球和灰铸铁作为摩擦副进行摩擦磨损试验,以模拟活塞环的服役环境。研究了添加剂羟基硅酸镁/二硫化钼(MSH/MoS_(2))含量不同的润滑油中镀铬层与灰铸铁之间的摩擦学行为。[结果]镀铬层具有微裂纹,显微硬度高达(1013.7±32.4)HV,平均厚度达(84.2±3.6)μm。润滑油中MSH/MoS_(2)纳米颗粒的质量分数为1.0%时,对镀铬钢球-灰铸铁摩擦副的减摩抗磨效果最显著,相较于采用纯润滑油时,镀铬钢球的平均摩擦因数和磨斑直径分别下降了28.2%和24.2%,灰铸铁的磨损率也下降了23.1%。[结论]润滑油中添加适量MSH/MoS_(2)纳米颗粒对镀铬钢球-灰铸铁摩擦副起到很好的减摩抗磨效果。[Introduction]The service environment of piston rings in combustion engine is harsh,so it is necessary to provide good lubrication conditions to reduce their wear loss.[Method]A hard chromium coating was electroplated on 2Cr13 steel ball,and its morphology,microhardness,and thickness were examined.Friction and wear tests of the chromium-plated steel ball against gray cast iron were conducted to simulate the service environment of piston rings.The tribological behaviors of chromium-plated steel ball and gray cast iron in presence of lubricant with different mass concentrations of magnesium silicate hydroxide/supramoly(MSH/MoS_(2))as additive were studied.[Result]The hard chromium coating had some microcracks with a high microhardness up to(1013.7±32.4)HV and an average thickness of(84.2±3.6)μm.The lubricant containing MSH/MoS_(2 )nanoparticles 1.0%by mass showed the best anti-friction and anti-wear performance on the chromium-plated steel ball–gray cast iron friction pair.As compared with the friction under pure lubricant,the average friction coefficient of chromium-plated steel ball and the diameter of wear spot on it were decreased by 28.2%and 24.2%,respectively,while the wear rate of gray cast iron was also decreased by 23.1%.[Conclusion]The addition of an appropriate amount of MSH/MoS_(2) nanoparticles to lubricant has good anti-friction and anti-wear effect on the chromium-plated steel ball–gray cast iron friction pair.

关 键 词：活塞环 电镀硬铬 服役环境 羟基硅酸镁 二硫化钼 润滑油 减摩抗磨 

分 类 号：TQ153.2[化学工程—电化学工业]