仿生非光滑表面对对磨副的损伤机理研究

利用激光处理技术在灰铸铁表面加工了4种具有非光滑形态的试样,对比研究非光滑形态对对磨副的影响规律。结果表明:非光滑表面对对磨副的损伤机理与光滑试样不同,为非光滑表面凸起对对磨副的微观切削作用。非光滑表面对磨副的磨损质量均远大于未处理试样的对磨副,以对磨副磨损质量为评价指标,条状、环状、点状和网状对对磨副的损伤作用依次减小,损伤最小的网状对磨副其质量损失仅为等面积比下的条状对磨副的55.66%,在相同的单元体面积比和几乎相同的显微硬度条件下,通过调整单元体的形态可以有效地减轻对对磨副的损伤作用。这是由于不同形态的非光滑表面在磨损过程中的载荷分配机制不同。

Damage M echanism in Counter Pairs Caused by Bionic Non-smoothed Surface

Four biomimetic non‐smoothed surface specimens with different shapes were prepared by la‐ser processing .Tests were conducted on MMU‐5G wear and abrasion test machine to study the influ‐encing rule of non‐smoothed surfaces on counter pairs .The results show that the mass loss of the fric‐tion pair matching with the non‐smoothed units is much greater than the ones matching with the smooth specimens .The pairs matching with different non‐smoothed units suffer differently .The non‐smoothed surface protruding zone exerts micro cutting on counter pairs .The striation causes the grea‐test mass loss of the pairs than the other non‐smoothed units ,w hich almost doubles the damage of the grid ones suffering the least .The difference in pairs damage is attributed to the different mechanism of undertaking the load in the process of w ear .T he damage can be alleviated effectively by changing the shapes of the units without increasing or decreasing the area ratio of the non‐smoothed units .