基于冲击动能控制的Cr-DLC涂层动力学响应和磨损行为
发布时间：2018-11-29 10:13
【摘要】：针对防护涂层在受动载时的磨损问题,在动能控制模式的冲击试验机上,通过动力学响应考察了Cr-DLC涂层的冲击磨损行为。响应包括冲击力波形和冲击动能的能量耗散,并以其基体304不锈钢作为对比材料。结果表明:材料的动力学响应差异反映了其抗冲击性的优劣。相同试验条件下,Cr-DLC涂层的冲击力峰值和能量吸收率分别低于304不锈钢约42.0%~51.8%和18.6%~20.8%。此外,还发现在冲击动能相同的情况下,调整速度或质量将会对动力学行为产生显著的影响。质量增大,冲击力峰值降低、接触时间延长;而增加速度仅提升冲击力峰值。通过动力学响应可定性的判断材料抗冲击性能,且与实际磨损结果有较好的吻合。Cr-DLC涂层由于其优异的抗冲击磨损性能以及良好化学稳定性,使其磨痕表面仅有少量的磨损剥落,且磨损氧化现象不明显;304不锈钢的冲击损伤形貌为典型的剥层磨损,材料去除和氧化反应首先发生在表面的剥层。
[Abstract]:Aiming at the wear problem of protective coating under dynamic load, the impact wear behavior of Cr-DLC coating was investigated by dynamic response on a kinetic energy controlled impact tester. The response includes the energy dissipation of the shock wave and kinetic energy, and the substrate 304 stainless steel is used as the contrast material. The results show that the difference of dynamic response reflects the impact resistance of the material. Under the same test conditions, the peak impact force and energy absorption rate of Cr-DLC coating are lower than that of 304 stainless steel by 51.8% and 18.6%, respectively. In addition, it is also found that adjusting the velocity or mass will have a significant effect on the dynamic behavior when the kinetic energy of the impact is the same. With the increase of mass, the peak value of impact force decreases and the contact time is prolonged, while the increasing velocity only increases the peak value of impact force. The impact resistance of the material can be judged qualitatively by the kinetic response, and it is in good agreement with the actual wear results. The Cr-DLC coating is characterized by its excellent impact wear resistance and good chemical stability. Only a small amount of wear exfoliation occurred on the worn surface, and the phenomenon of wear oxidation was not obvious. The impact damage morphology of 304 stainless steel is typical delamination. The material removal and oxidation reaction occur first on the surface.
【作者单位】： 西南交通大学摩擦学研究所;
【基金】：国家自然科学基金(51375407,51575459,U1530136,51627806) 四川省青年科技创新研究团队(2017TD0017)~~
【分类号】：TG174.4
，
本文编号：2364715
[Abstract]:Aiming at the wear problem of protective coating under dynamic load, the impact wear behavior of Cr-DLC coating was investigated by dynamic response on a kinetic energy controlled impact tester. The response includes the energy dissipation of the shock wave and kinetic energy, and the substrate 304 stainless steel is used as the contrast material. The results show that the difference of dynamic response reflects the impact resistance of the material. Under the same test conditions, the peak impact force and energy absorption rate of Cr-DLC coating are lower than that of 304 stainless steel by 51.8% and 18.6%, respectively. In addition, it is also found that adjusting the velocity or mass will have a significant effect on the dynamic behavior when the kinetic energy of the impact is the same. With the increase of mass, the peak value of impact force decreases and the contact time is prolonged, while the increasing velocity only increases the peak value of impact force. The impact resistance of the material can be judged qualitatively by the kinetic response, and it is in good agreement with the actual wear results. The Cr-DLC coating is characterized by its excellent impact wear resistance and good chemical stability. Only a small amount of wear exfoliation occurred on the worn surface, and the phenomenon of wear oxidation was not obvious. The impact damage morphology of 304 stainless steel is typical delamination. The material removal and oxidation reaction occur first on the surface.
【作者单位】： 西南交通大学摩擦学研究所;
【基金】：国家自然科学基金(51375407,51575459,U1530136,51627806) 四川省青年科技创新研究团队(2017TD0017)~~
【分类号】：TG174.4
，
本文编号：2364715
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