【摘要】：面對日益嚴峻的資源、能源問題,人們對機電設備的使用壽命以及安全穩(wěn)定性提出了更高的要求,服役環(huán)境對這些設備中運動部件摩擦磨損性能影響,受到越來越多科研人員的關注。隨著磁技術的進步,越來越多機電設備中的摩擦副工作于磁場環(huán)境中,研究磁場對材料摩擦磨損性能的影響變得十分必要。試驗在通電線圈施加磁場的條件下,以銷-環(huán)配副方式,在自行改進的摩擦磨損試驗機上分別研究磁場環(huán)境對鐵磁性材料45鋼自配副、抗磁性材料H62黃銅自配副以及45鋼與H62黃銅互配副干滑動摩擦磨損性能的影響。摩擦磨損試驗后利用掃描電子顯微鏡、X射線衍射儀、三維形貌儀以及透射電子顯微鏡等對磨損表面和磨屑進行表征。主要結論如下:對于鐵磁性材料45鋼,磁場增大摩擦系數,減小磨損率。磁場促進摩擦面和磨屑的氧化以及磨屑的細化,改變磨屑參與摩擦過程的方式,間接地提高摩擦過程中氧化磨損的比例。此外,磁場促進磨屑在摩擦接觸面間形成隔離層,避免摩擦面的直接接觸,從而改變鐵磁性材料的摩擦磨損性能。對于抗磁性材料H62黃銅以及45鋼環(huán)-H62黃銅銷互配副,磁場增大摩擦系數以及磨損率。磁場對抗磁性材料H62黃銅摩擦面和磨屑的氧化以及磨屑的粒度大小沒有明顯影響,且磁場對抗磁性材料有一種斥力的作用,促進抗磁性磨屑脫離摩擦面,使得摩擦面的接觸更加直接,從而增大抗磁性材料的摩擦磨損。對于鐵磁性材料45鋼,有磁場時,磨損率減小,摩擦接觸面間磨屑增多;利用壓縮空氣去除磨屑時,材料磨損率增大。干摩擦過程中,摩擦接觸面間存在的適量磨屑是整個摩擦系統(tǒng)自我調節(jié)的結果,改變摩擦副摩擦接觸面間的磨屑數量會直接影響到材料的摩擦接觸狀態(tài),從而影響材料的摩擦磨損性能。磁場對材料摩擦磨損性能的影響與材料的磁屬性有關,磁場有利于提高鐵磁性材料的耐磨性而降低抗磁性材料的耐磨性。
[Abstract]:In the face of increasingly serious problems of resources and energy, people put forward higher requirements for the service life and safety and stability of mechanical and electrical equipment. The service environment has an impact on the friction and wear performance of moving parts in these equipment. More and more researchers pay attention to it. With the development of magnetic technology, more and more friction pairs in mechanical and electrical equipment work in magnetic field environment, so it is necessary to study the influence of magnetic field on the friction and wear properties of materials. Under the condition of applying magnetic field to the electrified coil, the self-matching pair of ferromagnetic material 45 steel in magnetic field environment was studied on a self-improved friction and wear testing machine by means of pin-ring matching. Effect of anti-magnetic material H62 brass self-matching pair and dry sliding friction and wear properties of 45 steel and H62 brass pair on dry sliding friction and wear properties of anti-magnetic material H62 brass self-matching pair and 45 steel and H62 brass matching pair. After friction and wear test, scanning electron microscope, X-ray diffractometer, three-dimensional topography instrument and transmission electron microscope were used to characterize the worn surface and debris. The main conclusions are as follows: for ferromagnetic material 45 steel, the magnetic field increases the friction coefficient and reduces the wear rate. The magnetic field promotes the oxidation of friction surface and debris and the refinement of debris, changes the way in which the debris participates in the friction process, and indirectly increases the proportion of oxidation wear in the friction process. In addition, the magnetic field promotes the formation of isolation layer between the friction contact surfaces and avoids the direct contact of the friction surface, thus changing the friction and wear properties of ferromagnetic materials. For the antimagnetic material H62 brass and 45 steel ring-H62 brass pin pair, the magnetic field increases the friction coefficient and wear rate. The magnetic field has no obvious effect on the friction surface and debris oxidation of H62 brass and the particle size of the debris, and the magnetic field has a repulsive effect on the magnetic material, which promotes the anti-magnetic debris to detach from the friction surface. The contact of the friction surface is more direct, thus increasing the friction and wear of the diamagnetism material. For ferromagnetic material 45 steel, the wear rate decreases and the wear debris between friction contact surfaces increases when there is a magnetic field, and the material wear rate increases when compressed air is used to remove the debris. In the process of dry friction, the proper amount of debris between the friction contact surfaces is the result of the self-adjustment of the whole friction system. Changing the number of debris between the friction contact surfaces of the friction pair will directly affect the friction contact state of the material. Thus, the friction and wear properties of the material are affected. The effect of magnetic field on the friction and wear properties of materials is related to the magnetic properties of materials. Magnetic field is beneficial to improve the wear resistance of ferromagnetic materials and reduce the wear resistance of diammagnetic materials.
【學位授予單位】：河南科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG115.58

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