纳米TiN添加剂润滑条件下GCr15钢润滑与自修复性能的研究

发布时间：2018-06-26 10:10

  本文选题：纳米材料 + 润滑　； 参考：《西南交通大学》2015年硕士论文

【摘要】：自工业革命以后,机器动力取代人力工作的程度得到大幅提高；工作中的机器-般都有一个甚至多个摩擦体系在发生摩擦现象,摩擦会导致摩擦表面的磨损,严重磨损的机器功耗会增加、易发生故障和损坏、甚至造成重大事故。但工作的机器不能杜绝摩擦这一现象的发生,也无法避免设备的磨损。因此大部分设备均使用润滑技术来减少设备的摩擦,降低摩擦副的磨损。降摩减磨在很长一段时间内成为研究润滑油的重要内容。然而传统的润滑油并不具备自修复性能,不能实现“零磨损”和自修复作用。纳米材料被成功引入到润滑领域,不仅使得润滑油的降摩减磨性能大幅提高,同时也使其具备自修复性能,机械设备实现“零磨损”成为可能。本文主要利用MRS-10A四球摩擦磨损试验机进行试验研究。摩擦副采用钢球正四面体式点接触摩擦,材料为国际二级耐磨轴承钢GCr15。通过在基础润滑油中加入纳米粒子作为添加剂与基础油对比,在不同的纳米粒子浓度、载荷、转速、试验温度等试验参数下进行试验,利用光镜测量系,激光共聚焦扫描电子显微镜OLS1100、扫描电子显微镜(SEM)以及电子能谱仪(EDX)对磨损部位进行分析,研究其降摩减磨和自修复性能。本文通过试验研究的出以下几个结论：(1)纳米TiN添加剂可显著提高L-CKC220型润滑油的降摩减磨性能,且具有L-CKC220型润滑油所没有的磨损自修复性能。(2)在低浓度情况下,随着添加剂含量的增加,其降摩减磨及自修复效果随之增加而增加；在高浓度的情况下,添加剂的含量增加,其降摩减磨及自修复效果反而降低。(3)随着载荷增加,纳米TiN添加剂降摩减磨效果提高,当增大到某一特定值后,其降摩减磨效果减弱；载荷越大,纳米TiN添加剂的自修复性能越好。(4)低转速下,纳米TiN添加剂降摩减磨效果增幅较大,高转速(600r/min)下,其降摩减磨效果逐渐减弱；转速增大,纳米TiN添加剂的自修复性能越好。(5)当温度从30℃增长到45℃时,纳米TiN添加剂的降摩减磨效果有明显提高,其自修复效果变化较小,温度升高到600C及75℃以后,纳米TiN添加剂的降摩减磨效果及自修复效果迅速降低。
[Abstract]:Since the industrial revolution, the degree of machine power replacing human work has been greatly increased; there is one or more friction systems in the machine at work, and friction can lead to wear on the friction surface. Serious wear machine power consumption will increase, prone to failure and damage, and even cause serious accidents. But the working machine can not prevent the occurrence of friction, also can not avoid the wear of equipment. Therefore, most equipments use lubrication technology to reduce the friction and wear of the friction pairs. Friction and wear reduction has become an important part of lubricating oil research for a long time. However, the traditional lubricating oil does not have self-repairing performance and can not achieve "zero wear" and self-repair. Nanomaterials have been successfully introduced into the field of lubrication, which not only improves the friction and wear reduction performance of lubricating oil, but also makes it possible to achieve "zero wear" for machinery and equipment. This paper mainly uses MRS-10 A four-ball friction and wear tester to carry on the test research. The friction pair adopts the steel ball tetrahedron type point contact friction, the material is the international two-class wear-resistant bearing steel GCr15. By adding nanoparticles as additives to the base oil and comparing them with the base oil, the experiments were carried out under different test parameters, such as the concentration of nanoparticles, load, rotation speed, test temperature, etc., and the optical microscope was used to measure the system. Laser confocal scanning electron microscope (OLS1100), scanning electron microscope (SEM) and electron energy spectrometer (edX) were used to analyze the wear site and to study its antifriction and self-repairing properties. In this paper, the following conclusions are drawn from the experimental study: (1) Nano-tin additive can significantly improve the friction-reducing and antiwear performance of L-CKC220 lubricating oil, and has the wear self-repairing property that L-CKC220 lubricating oil does not. (2) at low concentration, With the increase of additive content, the friction-reducing and self-repairing effect increases, and at high concentration, the friction-reducing and self-repairing effect decreases. (3) with the increase of load, the antifriction and self-repairing effect of the additive increases with the increase of the additive content. The friction and wear reduction effect of nano-tin additive is improved, and when increasing to a certain value, the friction and wear reduction effect of nano-tin additive decreases, and the higher the load, the better the self-repair performance of nano-tin additive. (4) at low rotational speed, The friction and wear reduction effect of nano-tin additive is larger than that of nano-tin additive. At high rotational speed (600r/min), the friction and wear reduction effect of nano-tin additive decreases gradually, and the self-repair performance of nano-tin additive increases with the increase of rotation speed. (5) when the temperature increases from 30 鈩，

本文编号：2070025