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。
The work aims to study abrasion resistance of Spark Plasma Sintered （SPS） Fe48Cr15Mo14Y2C15B6 amorphous under sliding and erosion conditions. The Fe-based amorphous alloy coating was fabricated by adopting SPS technology. Slid-ing wear resistance and erosive wear resistance of the amorphous coating were evaluated by performing sliding and erosive wear test, respectively. Microstructure and wear morphology of the amorphous coating were analyzed using X-ray diffractometer and scanning electron microscopy. As the load increased from 10 N to 20 N, wear rate of amorphous coating increased from 0.089×10-3 mm3/m to 0.216×10-3 mm3/m, but coefficient of friction （COF） decreased from 0.841 to 0.778. As the erosion angle increased from 30° to 90°, volume loss rate of the amorphous coating first increased, then decreased and reached the maximum （15.80 mm3/h） at 45° under corrosive wear conditions. The wear surface morphology showed that sliding wear mechanism of the amorphous coating was mainly fatigue wear and adhesive wear, and erosive wear mechanism mainly appeared as brittle spalling of powder particle. Compared with AISI 52100 bearing steel, the SPSed amorphous coating exhibits lower wear rate and lower coefficient of friction under sliding friction condition, while exhibits worse wear resistance under corrosive wear.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2017年第7期117-121,共5页
Surface Technology
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~~
关键词
非晶合金
涂层
SPS
滑动磨损
冲蚀磨损
磨损机理
SPS
amorphous alloy
coating
spark plasma sintering
sliding wear
erosive wear
wear mechanism
