Zu Huicheng, He Zhiqiang, He Bin, Tang Zhuoquan, Fang Xiuyang, Cai Zhenbing, Cao Zhongqing, An Luling
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
State-Owned Wuhu Machinery Factory, Wuhu 340200, China.
Materials (Basel). 2023 Sep 13;16(18):6191. doi: 10.3390/ma16186191.
The finger lock structure of aircraft landing gear is prone to wear and failure during repeated locking and unlocking processes, which is disastrous for the service safety of the aircraft. At present, the commonly used material for finger locks in the industry is 30CrMnSiNi2A, which has a short wear life and high maintenance costs. It is crucial to develop effective methods to improve the wear resistance of 30CrMnSiNi2A finger locks. This work explores the wear resistance and wear mechanisms of different metallic coatings such as chromium, nickel, and cadmium-titanium on the surface of a 30CrMnSiNi2A substrate. The effects of load and wear time on the wear behavior are also discussed. The results indicated that the wear resistance of the chromium coating was the maximum. When the load was 80 N and 120 N, the wear mechanisms were mainly oxidation and adhesive. For greater loads, the wear mechanism of the coating after failure was mainly abrasive and oxidation, and the wear was extremely severe. When the load was 80 N, for a greater loading time, the wear mechanisms were mainly oxidation and adhesive.
飞机起落架的指形锁结构在反复锁定和解锁过程中容易磨损和失效,这对飞机的服役安全是灾难性的。目前,行业内指形锁常用的材料是30CrMnSiNi2A,其耐磨寿命短且维护成本高。开发有效的方法来提高30CrMnSiNi2A指形锁的耐磨性至关重要。这项工作探索了在30CrMnSiNi2A基体表面不同金属涂层(如铬、镍和镉钛)的耐磨性和磨损机制。还讨论了载荷和磨损时间对磨损行为的影响。结果表明,铬涂层的耐磨性最强。当载荷为80 N和120 N时,磨损机制主要是氧化和粘着。对于更大的载荷,涂层失效后的磨损机制主要是磨粒磨损和氧化,且磨损极其严重。当载荷为80 N时,对于更长的加载时间,磨损机制主要是氧化和粘着。