Accurate and fast prediction of cutting forces is important in high-performance cutting in the aerospace industry. Gamma titanium aluminide (γ-TiAl) is a material of choice for aerospace and automotive applications due to its superior thermo-mechanical properties. Nevertheless, it is a difficult to machine material. This article presents the prediction of cutting forces for Ti-48Al-2Cr-2Nb (48-2-2) γ-TiAl in milling process using orthogonal to oblique transformation technique. The novelty of this paper lies in reporting the orthogonal database of 48-2-2 γ-TiAl. Fundamental cutting parameters such as shear stress, friction angle and shear angle are calculated based on experimental measurements. Friction coefficients are identified for two different coating conditions which are AlTiN, and AlCrN on carbide tools. Predicted results are validated with the experimental cutting forces during end milling and ball-end milling operations for different cutting conditions. The simulated results showed good agreement with the experimental results, which confirms the validity of the force model.

切削力的准确和快速预测对于航空航天业的高性能切削至关重要。伽玛铝化钛（γ-TiAl）具有出色的热机械性能，是航空航天和汽车应用的首选材料。然而，很难加工材料。本文提出了采用正交变斜法对Ti-48Al-2Cr-2Nb（48-2-2）γ-TiAl铣削过程中切削力的预测。本文的新颖之处在于报告了48-2-2γ-TiAl的正交数据库。基本切削参数，例如剪切应力，摩擦角和剪切角是根据实验测量值计算的。确定了两种不同涂层条件下的摩擦系数，分别是硬质合金刀具上的AlTiN和AlCrN。在不同的切削条件下，通过端铣和球头铣削操作期间的实验切削力验证了预测结果。仿真结果与实验结果吻合良好，证实了力模型的有效性。