基于热处理模拟仿真的超高强度钢制复杂零件构型优化与验证

某超高强度钢制航空零件初始构型复杂，热处理后关键部位畸变量不能满足设计要求(±1 mm)。针对此问题，采用模拟仿真手段，研究了零件不同构型状态下的热处理畸变。结果表明，零件初始构型整体冷却先快后慢，厚壁部分应力较大，薄壁部分应力相对较小，尾部畸变最大，达2.16 mm。通过反复迭代优化零件有限元模型，模拟结果显示关键部位最大畸变量由最初的2.16 mm减少至0.90 mm,最终获得优化的零件构型。基于优化后的构型在实际生产中对零件进行了验证，零件各特征点实际畸变量均满足设计要求，模拟结果与实际生产结果吻合良好，证明了所建有限元模型的准确性及热处理模拟仿真技术在零件构型状态优化过程中的有效性。

Optimization and verification of configuration of complex parts produced by ultra-high strength steel based on heat treatment simulation

Key parts' distortion of an ultra-high strength steel aviation part cannot meet the design requirements (±1 mm) after heat treatment due to its complex initial configuration. To solve this problem, the heat treatment distortion of parts in different configurations was studied by means of simulation. The results show that the overall cooling of the initial configuration of the part is first fast and then slow, with higher stresses in the thick-walled part and relatively low stresses in the thin-walled part, and the largest distortion of 2.16 mm in the tail. Through iterative optimization of the finite element model, the simulation results show that the maximum distortion of the critical part is reduced from 2.16 mm to 0.90 mm, and the optimized part configuration is finally obtained. Based on the optimized configuration, the part is verified in actual production, and the actual distortion of each feature point of the part meets the design requirements, and the simulation results match well with the actual production results, which verifies the accuracy of the constructed finite element model and the effectiveness of the heat treatment simulation technology in the optimization of the configuration state.