發(fā)布時間：2018-06-26 10:10

  本文選題：納米材料 + 潤滑　； 參考：《西南交通大學(xué)》2015年碩士論文

【摘要】：自工業(yè)革命以后,機器動力取代人力工作的程度得到大幅提高；工作中的機器-般都有一個甚至多個摩擦體系在發(fā)生摩擦現(xiàn)象,摩擦?xí)䦟?dǎo)致摩擦表面的磨損,嚴(yán)重磨損的機器功耗會增加、易發(fā)生故障和損壞、甚至造成重大事故。但工作的機器不能杜絕摩擦這一現(xiàn)象的發(fā)生,也無法避免設(shè)備的磨損。因此大部分設(shè)備均使用潤滑技術(shù)來減少設(shè)備的摩擦,降低摩擦副的磨損。降摩減磨在很長一段時間內(nèi)成為研究潤滑油的重要內(nèi)容。然而傳統(tǒng)的潤滑油并不具備自修復(fù)性能,不能實現(xiàn)“零磨損”和自修復(fù)作用。納米材料被成功引入到潤滑領(lǐng)域,不僅使得潤滑油的降摩減磨性能大幅提高,同時也使其具備自修復(fù)性能,機械設(shè)備實現(xiàn)“零磨損”成為可能。本文主要利用MRS-10A四球摩擦磨損試驗機進行試驗研究。摩擦副采用鋼球正四面體式點接觸摩擦,材料為國際二級耐磨軸承鋼GCr15。通過在基礎(chǔ)潤滑油中加入納米粒子作為添加劑與基礎(chǔ)油對比,在不同的納米粒子濃度、載荷、轉(zhuǎn)速、試驗溫度等試驗參數(shù)下進行試驗,利用光鏡測量系,激光共聚焦掃描電子顯微鏡OLS1100、掃描電子顯微鏡(SEM)以及電子能譜儀(EDX)對磨損部位進行分析,研究其降摩減磨和自修復(fù)性能。本文通過試驗研究的出以下幾個結(jié)論：(1)納米TiN添加劑可顯著提高L-CKC220型潤滑油的降摩減磨性能,且具有L-CKC220型潤滑油所沒有的磨損自修復(fù)性能。(2)在低濃度情況下,隨著添加劑含量的增加,其降摩減磨及自修復(fù)效果隨之增加而增加；在高濃度的情況下,添加劑的含量增加,其降摩減磨及自修復(fù)效果反而降低。(3)隨著載荷增加,納米TiN添加劑降摩減磨效果提高,當(dāng)增大到某一特定值后,其降摩減磨效果減弱；載荷越大,納米TiN添加劑的自修復(fù)性能越好。(4)低轉(zhuǎn)速下,納米TiN添加劑降摩減磨效果增幅較大,高轉(zhuǎn)速(600r/min)下,其降摩減磨效果逐漸減弱；轉(zhuǎn)速增大,納米TiN添加劑的自修復(fù)性能越好。(5)當(dāng)溫度從30℃增長到45℃時,納米TiN添加劑的降摩減磨效果有明顯提高,其自修復(fù)效果變化較小,溫度升高到600C及75℃以后,納米TiN添加劑的降摩減磨效果及自修復(fù)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，

本文編號：2070025