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应用摩擦磨损试验机进行摩擦磨损实验并对实验前后零件称重以分析其在不同条件下摩擦系数和磨损率的变化;对零件实验前后表面组织和形貌采用金相显微镜和扫描电子显微镜分别进行观察以研究其磨损机理。结果表明,在干摩擦、氯化钠(NaCl)和人工唾液润滑条件下,SLM成型件正面的磨损率比铸造件分别低27.92%、21.15%和19.03%,比侧面分别低26.97%、10.88%和14.97%;SLM成型件与铸造件相比,表面组织更加均匀,基本无孔洞;在干摩擦下表现为磨粒磨损,在NaCl及人工唾液润滑条件下主要表现为磨粒磨损和疲劳磨损。
Friction and wear testing machine friction and wear test machine before and after the test parts were weighed to analyze the friction coefficient and wear rate changes under different conditions; parts of the surface microstructure and morphology before and after the experiment using a metallographic microscope and scanning electron microscopy Observed to study its wear mechanism. The results show that the wear rate of SLM is 27.92%, 21.15% and 19.03% less than that of castings, respectively, 26.97% and 10.88% lower than that of the side under the condition of dry friction, NaCl and artificial saliva respectively. And 14.97%, respectively. Compared with the castings, the SLM formed parts were more uniform and almost non-porous. The abrasive wear was observed under dry friction and abrasive wear and fatigue wear under NaCl and artificial saliva lubrication conditions.