發(fā)布時間：2019-03-17 17:45

【摘要】：載流摩擦磨損過程中,摩損表面形貌不斷發(fā)生變化,會影響電弧放電,而電弧反過來又會影響表面形貌,探究兩者的相互作用關(guān)系,以進一步了解電弧行為與載流摩擦磨損性能的動態(tài)變化。為此,在HST-100高速載流摩擦磨損試驗機上以銅/鉻青銅為摩擦副進行載流摩擦磨損試驗。結(jié)合摩擦系數(shù)、磨損率的變化,探究電弧與載流摩擦磨損性能的關(guān)系;利用掃描電子顯微鏡(SEM)和能譜儀(EDS)對摩擦表面以及縱剖面進行微觀觀察,分析磨損表面形貌的變化特點;利用三維形貌儀測量磨損表面粗糙度,對表面形貌、電弧參數(shù)以及載流摩擦磨損性能參數(shù)進行定量分析,探究表面粗糙度與電弧能量、載流摩擦質(zhì)量和載流摩擦磨損性能之間的相互作用關(guān)系。研究結(jié)果表明,載流摩擦過程中,摩擦表面上有顯著的粘著磨損現(xiàn)象,并形成層片狀磨屑與棒狀磨屑。摩擦表層及次表層存在塑性變形區(qū)且隨著距離摩擦表面遠(yuǎn)近的不同,變形區(qū)形貌也不同。摩擦?xí)r間短的塑性變形區(qū)較窄且分層不明顯;隨著摩擦?xí)r間增加,塑性變形區(qū)變大且分層明顯;磨損后期,材料熔融堆積嚴(yán)重,嚴(yán)重塑性變形區(qū)較大,而整體變形區(qū)有所減小。對于純銅材料而言,電弧侵蝕形式主要有熔融噴濺與熔融堆積。在載流摩擦過程中,純銅摩擦表面發(fā)生了氧化。載流摩擦磨損過程中,不同磨損時期,表面粗糙度與電弧參數(shù)、載流質(zhì)量、載流摩擦磨損性能的變化不同,而且相互作用,相互影響。質(zhì)量磨損率呈“U”形變化,材料的磨損率與電弧的強度成正比例非線性關(guān)系。磨損初期,表面粗糙度較大,起弧頻率較高且多為大電弧,相應(yīng)的電弧能量也較高,質(zhì)量磨損率較大;磨損中期,表面粗糙度較低,起弧頻率以及大電弧出現(xiàn)頻率均較小,電弧能量小,摩擦系數(shù)與質(zhì)量磨損率較低,摩擦副接觸狀態(tài)較好,整體載流摩擦磨損性能好;磨損后期,表面質(zhì)量變差,摩擦系數(shù)升高,電弧能量升高,磨損率增加,摩擦狀態(tài)變差。
[Abstract]:In the process of current-carrying friction and wear, the surface morphology changes constantly, which will affect the arc discharge, and the arc in turn will affect the surface morphology, to explore the interaction between the two. In order to further understand the arc behavior and the dynamic change of current-carrying friction and wear properties. Therefore, the current-carrying friction and wear tests were carried out on the HST-100 high-speed current-carrying friction and wear tester using copper / chromium bronze as friction pair. According to the change of friction coefficient and wear rate, the relationship between arc and current-carrying friction and wear properties is discussed. Scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) were used to observe the friction surface and longitudinal profile, and the change characteristics of the worn surface morphology were analyzed. The surface roughness, arc parameters and current-carrying friction and wear performance parameters were quantitatively analyzed by using a three-dimensional topography instrument, and the surface roughness and arc energy were investigated. The interaction between current-carrying friction quality and current-carrying friction and wear properties. The results show that there are obvious adhesion and wear phenomena on the friction surface in the process of current-carrying friction, and the lamellar wear debris and rod-like wear debris are formed. There is a plastic deformation zone between the friction surface and the subsurface, and the morphologies of the deformation zone are different with the distance from the friction surface to the friction surface. The plastic deformation zone with short friction time is narrow and the stratification is not obvious; with the increase of friction time, the plastic deformation zone becomes larger and more obvious; at the later stage of wear, the melt accumulation of the material is serious, the serious plastic deformation zone is larger, but the whole deformation zone is decreased. For pure copper materials, the main forms of arc erosion are melting spatter and melting accumulation. In the process of current-carrying friction, oxidation occurs on the friction surface of pure copper. In the process of current-carrying friction and wear, the surface roughness, arc parameters, current-carrying quality and friction and wear properties of the current-carrying friction and wear process are different from each other in different wear periods, and they interact and interact with each other. The wear rate of the material is changed in the shape of "U", and the wear rate of the material is non-linear in proportion to the strength of the arc. In the early stage of wear, the surface roughness is larger, the frequency of arc initiation is higher and the arc is large, the corresponding arc energy is also higher, and the wear rate of mass is higher. In the middle stage of wear, the surface roughness is low, the frequency of arc initiation and the occurrence frequency of large arc are lower, the energy of arc is small, the friction coefficient and mass wear rate is lower, the contact state of friction pair is better, and the overall current carrying friction and wear performance is good. At the end of wear, the surface quality, friction coefficient, arc energy, wear rate and friction state become worse.
【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG115.58

【參考文獻】

相關(guān)期刊論文 前10條

1 徐曉峰;逄顯娟;楊正海;張永振;;電流對載流摩擦副材料損傷行為的影響[J];潤滑與密封;2015年11期

2 王一帆;上官寶;張永振;楊正海;杜三明;;紫銅/鉻青銅摩擦磨損過程中電弧特性[J];河南科技大學(xué)學(xué)報(自然科學(xué)版);2015年04期

3 張會杰;孫樂民;上官寶;張永振;;高速鐵路弓網(wǎng)電弧的研究現(xiàn)狀[J];潤滑與密封;2014年05期

4 魏龍;劉其和;張鵬高;;基于分形理論的滑動摩擦表面接觸力學(xué)模型[J];機械工程學(xué)報;2012年17期

5 王萬崗;吳廣寧;高國強;王波;崔易;劉東來;;高速鐵路弓網(wǎng)電弧試驗系統(tǒng)[J];鐵道學(xué)報;2012年04期

6 王萬崗;吳廣寧;趙云云;高國強;王波;;弓網(wǎng)電弧電氣特性試驗研究[J];低壓電器;2012年06期

7 沈志云;;論我國高速鐵路技術(shù)創(chuàng)新發(fā)展的優(yōu)勢[J];科學(xué)通報;2012年08期

8 閆小青;謝志龍;樊保圣;扶名福;;基于表面粗糙度影響的摩擦聲發(fā)射特性研究[J];摩擦學(xué)學(xué)報;2011年06期

9 陳立;吳廣寧;高國強;朱軍;王波;;高速鐵路弓網(wǎng)電接觸研究綜述[J];機車電傳動;2011年05期

10 冀盛亞;孫樂民;;載流摩擦磨損中影響起弧的因素分析[J];材料導(dǎo)報;2011年14期

相關(guān)博士學(xué)位論文 前1條

1 董霖;載流摩擦磨損機理研究[D];西南交通大學(xué);2008年

相關(guān)碩士學(xué)位論文 前6條

1 馬成;基于燃弧檢測裝置的弓網(wǎng)受流質(zhì)量試驗分析[D];西南交通大學(xué);2013年

2 田磊;滑動摩擦條件下電弧的產(chǎn)生及其對載流摩擦磨損性能的影響[D];河南科技大學(xué);2012年

3 楊志鵬;弓網(wǎng)電弧研究及其檢測[D];北京交通大學(xué);2011年

4 蔣幸昌;升降弓過程中弓網(wǎng)電弧研究[D];西南交通大學(xué);2011年

5 趙燕霞;柔性接觸條件對載流摩擦磨損特性的影響[D];河南科技大學(xué);2011年

6 何常紅;弓網(wǎng)電弧模擬系統(tǒng)的研制和試驗研究[D];西南交通大學(xué);2009年

，

本文編號：2442536