在新型冲击微动磨损试验机上对304不锈钢薄壁管进行冲击微动磨损试验，研究了支撑结构（角度）和管长对薄壁管冲击微动损伤行为的影响，并对其界面响应和磨损机制进行分析。研究结果表明：当管长相同时，随着支撑结构角度的增大，薄壁管的变形量和冲击接触时间增大，而冲击接触峰值力、能量吸收率和磨损程度降低。当支撑结构角度相同时，管长的增加会导致变形量和冲击接触时间的减小，接触峰值力、能量吸收率和磨损程度的增大。通过对磨痕分析，304不锈钢薄壁管的冲击微动磨损的损伤机制主要是材料表面的疲劳剥落。
The test investigated the impact fretting wear behaviour of 304 stainless steel thin-walled tube under different support interface (angle) and tube length through a new impact wear tester. The contact interface characteristics and damage behavior of the tubes was inspect during the impact fretting progress. The results showed that when the support angle increasing, the value of maximum deflection and contact time increased, but the contact peak force, energy absorption, and wear damage degree decreased. The rise of length leaded to reduce the deflection and contact time, meanwhile an increase in contact force, energy absorption ratio and serious damage degree. Through analyzing the morphologies and profiles of the wear scars, the wear mechanisms of impact fretting wear of 304 stainless steel thin wall tube was contact fatigue spalling.
PDF(3777 KB)
