放电等离子烧结铁基非晶涂层的滑动与冲蚀磨损性能

发布时间：2018-07-28 20:38

【摘要】：目的研究放电等离子烧结的Fe_(48)Cr_(15)Mo_(14)Y_2C_(15)B_6非晶涂层在滑动和冲刷条件下的耐磨性。方法利用放电等离子烧结(SPS)技术,制备Fe基非晶态合金涂层。通过滑动磨损实验和冲蚀磨损试验,分别评价非晶涂层的滑动磨损性能和冲蚀磨损性能,并通过X射线衍射仪和扫描电子显微镜分析非晶涂层的组织结构以及磨损形貌。结果非晶涂层在滑动摩擦条件下,随着载荷由10 N增加至20 N,磨损率由0.089×10~(-3)mm~3/m上升到0.216×10~(-3)mm~3/m,但摩擦系数由0.841减小到0.778。非晶涂层在冲蚀磨损条件下的体积磨损率随着冲蚀角度(30°~90°)的增加,先增大后减小,45°时达到极大值(15.80 mm~3/h)。磨损表面形貌表明,铁基非晶的滑动磨损机制主要是疲劳磨损和粘着磨损,冲蚀磨损机制主要表现为构成涂层的粉末颗粒的脆性剥落。结论与常用AISI 52100轴承钢相比,SPS制备的非晶涂层在滑动摩擦条件下有着显著的低磨损率和低摩擦系数,但在冲蚀磨损条件下的耐磨性能较差。
[Abstract]:Aim to study the wear resistance of Fe _ (48) Cr _ (15) Mo _ (14) Y _ 2C _ (15) B _ 6 amorphous coatings sintered by spark plasma sintering under sliding and scouring conditions. Methods Fe-based amorphous alloy coatings were prepared by spark plasma sintering (SPS). The sliding and erosive wear properties of amorphous coatings were evaluated by sliding wear test and erosion wear test respectively. The microstructure and wear morphology of amorphous coatings were analyzed by X-ray diffraction and scanning electron microscopy. Results under sliding friction condition, the wear rate of amorphous coating increased from 0.089 脳 10 ~ (-3) mm~3/m to 0.216 脳 10 ~ (-3) mm ~ (-3) with the increase of load from 10 N to 20 N, but the friction coefficient decreased from 0.841 to 0.778. The volume wear rate of the amorphous coating increases with the erosion angle (30 掳~ 90 掳) and reaches the maximum value (15.80 mm~3/h) when the erosion angle increases first and then decreases to 45 掳. The wear surface morphology shows that the sliding wear mechanism of Fe-based amorphous particles is mainly fatigue wear and adhesion wear, while the erosion wear mechanism is mainly characterized by brittle spalling of the powder particles forming the coating. Conclusion compared with the conventional AISI 52100 bearing steel, the amorphous coatings prepared by SPS have obvious low wear rate and low friction coefficient under sliding friction, but the wear resistance is poor under erosive wear.
【作者单位】：河海大学机电工程学院;
【基金】：常州市国际科技合作计划(CZ20150011) 河海大学常州校区研究生创新工程项目~~
【分类号】：TG174.4

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