航空齿轮表面硬化后硬度与强度关系探究

Relationship between Vickers Hardness and Strength for Surface Hardened Layer of Aircraft Gear

表面硬化处理是提高航空齿轮机械性能的重要手段,大量的航空齿轮破坏都与齿轮硬化层有关,确定齿轮硬化层的力学性能很关键。由于表面硬化使齿轮材料力学性能变的不均匀,利用传统力学试验难以测定其材料性能。本文利用维氏硬度试验和ABAQUS有限元分析相结合的方式,得出了齿轮材料硬化层的维氏硬度和其力学参数之间具有相关性,为获取齿轮硬化层力学性能不均匀区域的基本力学参数提供了一条新的途径,为更加充分发挥表面硬化处理零件的工作能力提供依据。

Surface hardening is an important way to improve mechanical performance of aircraft gears.A large number of aircraft gear failure is related to gear hardened layer,therefore to determine mechanical properties of gear hardened layer is very critical.Due to surface hardening,mechanical properties of gear materials are not uniform.So it is difficult to determine the properties of materials with the traditional mechanical test methods.In the paper,the approximate relationship between the Vickers hardness and the yield strength of the surface hardened layer of aircraft gear is analyzed based on the comparison and analysis between the Vickers hardness experimental results and the simulated via ABAQUS.That it provides a new way to determine the material mechanical parameters of heterogeneous materials and full use the working ability of surface hardening parts.