用于螺杆泵的新型自润滑材料性能研究

发布时间：2018-05-14 05:10

本文选题：粘结固体润滑 + Ni基涂层　；参考：《安徽工业大学》2013年硕士论文

【摘要】：通过气压喷涂法制备了MoS2基、PTFE基两类粘结固体润滑涂层，利用MMW-10型销盘式摩擦磨损试验机评价了粘结涂层在干摩擦滑动条件下的摩擦磨损性能，并对粘结涂层进行了磨痕形貌分析。结果表明，常温固化时MoS2基环氧粘结涂层的摩擦磨损性能优于MoS2基酚醛环氧粘结涂层。与未填充涂层相比，分别填充Cu粉、SiC、c-BN、h-BN、T60的两类PTFE基粘结涂层在载荷为128N、转速为180rpm试验条件下的磨损质量均降低，同时平均摩擦系数有不同程度增加。由磨痕形貌对比分析可知，空白涂层试样磨损表面粗糙，断面呈现明显的带状结构；PTFE基酚醛环氧粘结填充涂层磨损表面均呈现出一定程度的犁沟和切削。通过氧乙炔火焰喷涂法制备了Ni基复合涂层，利用MPX-2000A型销盘式摩擦磨损试验机评价了复合涂层在干摩擦滑动条件下的摩擦磨损性能，并对复合涂层进行了磨痕形貌分析。结果表明，在转速为200rpm的试验条件下，分别填充5wt.%WS2、石墨、h-BN、c-BN、SiC、Cu粉后Ni基复合涂层平均摩擦系数均随着压力载荷增加而降低；填充SiC、石墨、c-BN复合涂层磨损质量呈增大趋势，而填充WS2、h-BN以及Cu复合涂层在载荷从50N增大到100N时磨损质量开始下降。另外，，石墨与α-Al2O3、SiC以及Cu粉之间存在着一定的耐磨协同效应。由磨痕形貌分析可知，空白铸铁试样发生了严重的疲劳磨损，而复合涂层磨损表面呈现出较为均匀的划痕。通过模压法制备了分别填充Cu粉、氧化铝、石墨、MoS2后的酚醛树脂基复合材料，利用MPX-2000A型销盘式摩擦磨损试验机评价了复合材料在干摩擦滑动条件下的摩擦磨损性能，并对复合材料进行了磨痕形貌分析。结果表明，复合材料磨损质量在载荷为100N、转速为500rpm试验条件下均有不同程度降低。石墨填充复合材料的磨损质量随着石墨含量增加而降低，表现出最好的耐磨性能。由磨痕形貌分析可知，纯酚醛树脂材料磨损表面大量脱落，具有明显的磨痕，无明显润滑膜；而石墨填充试样磨损表面呈现出均匀的润滑膜。
[Abstract]:Two kinds of bonded solid lubricating coatings based on MoS2 were prepared by air pressure spraying. The friction and wear properties of the adhesive coatings under dry friction and sliding conditions were evaluated by MMW-10 type pin-disc friction and wear tester. The wear trace morphology of the adhesive coating was analyzed. The results show that the friction and wear properties of MoS2 based epoxy adhesive coating are better than that of MoS2 based phenolic epoxy adhesive coating at room temperature. Compared with the unfilled coating, the wear quality of the two kinds of PTFE based bonding coatings filled with Cu powder SiCnc-BN h-BNN T60 under the loading of 128N and the rotational speed of 180rpm decreased, and the average friction coefficient increased to some extent. The wear surface of the blank coating sample is rough and the section is obviously striped structure PTFE based phenolic epoxy bonding filled coating wear surface showing a certain degree of ploughing and cutting. Ni-based composite coatings were prepared by oxyacetylene flame spraying. The friction and wear properties of the composite coatings under dry friction and sliding conditions were evaluated by MPX-2000A type pin-disc friction and wear tester, and the wear characteristics of the composite coatings were analyzed. The results show that the average friction coefficient of Ni based composite coatings decreases with the increase of pressure load, and the wear quality of sic, graphite and graphite composite coatings increases with the increase of pressure under the experimental condition of rotating speed of 200rpm. However, when the loading increases from 50N to 100N, the wear quality of the WS2H-BN and Cu composite coatings begins to decrease. In addition, there is a synergistic wear resistance between graphite, 伪 -Al _ 2O _ 3 sic and Cu powder. From the analysis of wear trace morphology, it can be seen that the blank cast iron sample has serious fatigue wear, while the wear surface of the composite coating shows a more uniform scratch. The phenolic resin matrix composites filled with Cu powder, alumina and graphite MoS2 were prepared by moulding method. The friction and wear properties of the composites under dry friction and sliding conditions were evaluated by MPX-2000A pin-disc friction and wear tester. The wear marks of the composites were analyzed. The results show that the wear mass of the composites decreases in varying degrees when the load is 100 N and the rotational speed is 500rpm. The wear quality of graphite filled composites decreases with the increase of graphite content, showing the best wear resistance. The wear surface of the pure phenolic resin material was found to have a large amount of wear surface and no obvious lubricating film, while the graphite filled sample showed a uniform lubricating film on the wear surface.
【学位授予单位】：安徽工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH327;TB39

【相似文献】