微织构光固化填充h-BN的巴氏合金表面摩擦学性能
Tribological Properties of Micro-texture Babbitt Alloy Surface with Light Curing h-BN
倪侃 1周元凯 2左雪2
作者信息
- 1. 江苏科技大学机械工程学院,江苏镇江 212100
- 2. 江苏科技大学机械工程学院,江苏镇江 212100;江苏科技大学江苏省船海机械先进制造及工艺重点实验室,江苏镇江 212100
- 折叠
摘要
为了提高巴氏合金在油润滑条件下的摩擦学性能,在巴氏合金表面加工凹坑微织构并利用光固化填充方法填充六方氮化硼(h-BN)固体润滑剂,制备出h-BN与表面微织构相结合的复合润滑结构.研究复合润滑结构在油润滑条件下的摩擦学性能及其减摩润滑机制.结果表明:复合润滑结构的摩擦学性能远高于未织构面和纯织构面;当凹坑微织构直径较小时,织构密度为10％～20％时,复合润滑结构摩擦因数较小,而凹坑直径较大时,随着织构密度的增加,复合润滑结构摩擦因数逐渐减小;当织构密度小于20％时,凹坑直径较小的复合润滑结构摩擦因数小,当织构密度达到30％时,随着凹坑直径的增加,复合润滑结构摩擦因数减小.复合润滑结构能够改善巴氏合金表面摩擦学性能,是因为h-BN固体润滑剂的释放在巴氏合金表面形成了固体润滑薄膜,避免了润滑油膜较薄处的巴氏合金表面直接与45钢表面接触,且释放h-BN固体润滑剂后的微织构凹坑可以起到收集磨粒,储存润滑油的作用.
Abstract
In order to improve the tribological properties of Babbitt alloy under oil lubrication condition,a composite lu-brication structure composed of hexagonal boron nitride(h-BN)solid lubricant andsurface micro-texture was prepared by filling h-BN solid lubricant into the micro-textured dimples on the surface of Babbitt alloy by light curing method.The tri-bological properties of the composite lubrication structure and the mechanism of antifriction and lubrication under the con-dition of oil lubrication were studied.The results show that the tribological properties of the composite lubrication structure are much higher than that of the untextured and pure textured surfaces.When the dimple diameter is small and the micro-texture is between 10％to 20％,the friction coefficient of the composite lubrication structure is low.When the dimple diam-eter is large,the friction coefficient of the composite lubrication structure decreases gradually with the increase of dimple density.When the dimple density is less than 20％,the friction coefficient of the composite lubrication structure with smal-ler dimple diameter is low.As the dimple density reaches 30％,the friction coefficient of the composite lubrication structure decreases with the increase of dimple diameter.The composite lubrication structure can greatly improve the tribological properties of Babbitt alloy surface because the release of h-BN solid lubricant forms a solid lubricant film on the surface of Babbitt alloy,which avoids the direct contact between the Babbitt alloy surface at the thinner part of the lubricating oil film and the surface of 45 steel,and the micro-textured dimples after the release of h-BN play the role of collecting abrasive particles and storing lubricating oil.
关键词
复合润滑结构/光固化/织构密度/凹坑织构/摩擦学性能Key words
composite lubrication structure/light curing/texture density/dimple texture/tribological properties引用本文复制引用
基金项目
江苏省研究生科研与实践创新计划项目(SJCX22-1916)
出版年
2024
NETL
NSTL
万方数据