TC11钛合金整体叶盘锻件组织均匀性评价方法

Evaluation of Microstructure Homogeneity in TC11 Titanium Alloy Blisk Forging

根据锻件内热力参数分布情况建立了基于Taguchi方法的损失函数,探索盘类锻件组织均匀性数值评价方法。应用所建立的损失函数以及TC11钛合金整体叶盘的锻造过程有限元数值模拟结果,对TC11钛合金整体叶盘组织均匀性进行了数值评价,并进行了试验验证。结果表明,对于TC11钛合金整体叶盘锻件,应用本文建立的质量损失函数贡献因子得到的损失函数(情况2)的评价结果与实际生产得到的锻件内组织均匀性一致性好,且当质量损失函数值在0.33～0.44范围内时,锻件的组织均匀性能满足技术条件要求。

A loss function（LF） based on the distribution of thermalmechanical parameters was proposed referring to the concept of Taguchi method to explore the method of evaluating microstructure homogeneity in disk forging.The forging process of the TC11 titanium alloy blisk and the subsequent evaluation of microstructure homogeneity were analyzed by using FEM and the proposed method.The experiment was performed.The comparison results show that,for TC11 titanium alloy blisk forging,the LF in case 2 proposed in this paper can more appropriately evaluate the microstructure homogeneity,and that the blisk forging with satisfied technical requirements can be obtained when the LF values are in the range of 0.33~0.44.