Multi-component assembly casting

摘要

Multi-component vane segment and method for forming the same. Assembly includes: positioning a pre-formed airfoil component (12) and a preformed shroud heat resistant material (18) in a mold, wherein the airfoil component (12) and the shroud heat resistant material (18) each comprises an interlocking feature (24); preheating the mold; introducing molten structural material (46) into the mold; and solidifying the molten structural material such that it interlocks the pre-formed airfoil component (12) with respect to the preformed shroud heat resistant material (18) and is effective to provide structural support for the shroud heat resistant material (18). Surfaces between the airfoil component (12) and the structural material (46), between the airfoil component (12) and the shroud heat resistant material (18), and between the shroud heat resistant material (18) and the structural material (46) are free of metallurgical bonds.

主权项

1. A vane segment comprising;
an airfoil comprising an airfoil structural material; and a shroud segment comprising a shroud heat resistant material and a cast shroud structural material underlying and providing structural support for the shroud heat resistant material, wherein the shroud heat resistant material is discrete from the airfoil structural material, wherein the shroud heat resistant material is set apart from the shroud structural material by not more than a layer of oxides therebetween, wherein the shroud structural material is discrete from, cast around, and secured to an end of the airfoil structural material and acts as a monolithic interlock between the airfoil structural material and the shroud heat resistant material, and wherein a joint between the shroud structural material and the airfoil structural material is free of metallurgical bonds.