Investment casting method of titanium-aluminium alloy

The invention discloses an investment casting method of a titanium-aluminium alloy. The investment casting method of titanium-aluminium alloycomprises new technologicalcontens of mold shell online heating, gradient type cooling after pouring and the like. The investment casting method of the titanium-aluminium alloycontributes to forming a thin-wall TiAl alloy casting, the defects of cavity shrinkage and porosityshrinkage are reduced, cooling crack of a castingis avoided in the solidification process, and the investment casting method of the titanium-aluminium alloy is an important precision castingtechnological method of the high-end casting in the future. 本发明提供了种钛铝合金熔模铸造方法，本发明包含模壳在线加热、浇注后梯度式降温等新的工艺内容。本发明方法有助于薄壁TiAl合金铸件成形，减少缩孔缩松缺陷，铸件在凝固过程中不会发生冷裂，是未来高端铸件的重要精密铸造工艺方法。