Howmet Corporation

Howmet Research Corporation

Jeffrey D Irvine

Jeffery S Smith

Patrick L Conroy

Russell G Vogt

John R Mihalisin

Gail R Cole

Donald L Bierstine

Christine M Stabile

Thomas W Nielsen

John P Kunkle

Directionally solidified superalloy components having a bulk sulfur concentration of less than 1 part per million by weight are provided by vacuum melting a charge to form a superalloy melt, desulfurizing the melt by contact with a calcium-bearing desulfurizing agent for a time to reduce sulfur concentration of the melt to less than 1 ppm by weight, casting the melt directly or following solidification and remelting in a ceramic investment mold, and directionally solidifying the melt as cast components without adverse bulk sulfur pick-up subsequent to desulfurization to provide castings having a sulfur content below 1 ppm, such as in the range of hundreds of parts per billion to provide significantly improved oxidation resistance.

Ultra low sulfur superalloy castings and method of making

A plurality of engine-run components are fixtured on a cleaning fluid manifold disposed in a cleaning chamber with the internal passage of each component communicated to a respective fluid spray nozzle on the cleaning fluid manifold, a heated caustic cleaning fluid is pumped to the manifold for flow through the nozzle and then the internal passage of each component for a time to remove the deposits, and the heated cleaning fluid is discharged from each component into the cleaning chamber.

Cleaning, method for cleaning internal airfoil cooling passages

Cleaning apparatus and method for cleaning internal airfoil cooling

Growing community of inventors

Whitehall, MI, United States of America

Jeffrey D Irvine