Yu Shuangyang, Chong Qi, Zhou Jianzhu, Yang Youwen, Li Hua
School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
Micromachines (Basel). 2024 Nov 27;15(12):1428. doi: 10.3390/mi15121428.
This study focuses on the planetary gear reducer and employs ANSYS 13.0 software to perform thermo-mechanical coupled simulations for the laser cladding repair process, aiming to address gear failure caused by cracks. The optimal theoretical repair parameters were determined based on temperature and stress field analyses, and performance testing of the cladding layer was conducted to validate the feasibility of the selected parameters. The results suggest that a laser power of 140 W and a scanning speed of 8 mm/s represent the optimal theoretical parameters for the laser cladding repair of the gear workpiece. Tensile strength tests revealed that the cladding layer's maximum tensile strength reached 1312.80 MPa, which was 1.22 times higher than that of the substrate material. Additionally, the wear resistance tests indicated that the wear loss of the cladding layer under the optimized parameters reduced from 9.3 mg for the base material to 0.5 mg, demonstrating excellent wear resistance. Thus, the mechanical properties of the cladding layer were significantly enhanced compared to the base material under these theoretical process parameters.
本研究聚焦于行星齿轮减速器，并采用ANSYS 13.0软件对激光熔覆修复过程进行热-机械耦合模拟，旨在解决因裂纹导致的齿轮失效问题。基于温度和应力场分析确定了最佳理论修复参数，并对熔覆层进行性能测试以验证所选参数的可行性。结果表明，140 W的激光功率和8 mm/s的扫描速度是齿轮工件激光熔覆修复的最佳理论参数。拉伸强度测试显示，熔覆层的最大拉伸强度达到1312.80 MPa，比基体材料高出1.22倍。此外，耐磨性测试表明，在优化参数下，熔覆层的磨损量从基体材料的9.3 mg降至0.5 mg，显示出优异的耐磨性。因此，在这些理论工艺参数下，熔覆层的力学性能相较于基体材料有显著提高。
