Diffused aluminide coatings provide high temperature oxidation protection for gas turbine engine components. Aluminum is diffused into the base metal of turbine components using pack methods to form a protective aluminide. These coatings are applied to specified locations on turbine blades, vanes, and blade tracks. (NADCAP accredited)
Plasma & Metal Sprays
Plasma Spray is a process that deposits metallic and non-metallic materials onto gas turbine engine components. Typically these materials are sprayed onto the base metal by feeding powdered materials into a flame. The plasma sprayed materials can provide oxidation resistance, thermal insulation and wear resistance. Specifically, Turbomachinery Products uses nickel graphite sprayed powder to create air "dam" coatings on blade root forms. (NADCAP accredited)
Vacuum Heat Treating
Vacuum Heat treating is a process that allows oxidation-free thermal processing of turbine components. Typical thermal cycles include diffusion of coatings, precipitation hardening, brazing and stress relief for blades, vanes, dampers, and blade tracks. (NADCAP accredited)
Abrasive Media Finishing
Abrasive Media finishing is a process that precisely removes sharp corners and raised materials. This process can also be used to control specific surface roughness requirements. This process is used on all part types such as blades, vanes, blade tracks, and dampers.
Brazing
Brazing is a process that is typically used to permanently join metallic turbine components together. The parts are usually diffusion bonded together using a nickel based braze alloy in a high temperature vacuum cycle. Brazing is used to attach covers, clips, and baffles to turbine components such as blades, vanes, dampers, and blade tracks.
Welding
Welding is another process used to permanently join two metallic components together or change the metallurgy of a metallic component. This process is accomplished by using a torch to melt a piece of weld wire on the metallic component. Argon gas is typically used as a cover gas to prevent oxide contamination in welds. Turbomachinery Products also provides NC laser welding. Specifically, welding is used to attach baffles and covers to turbine airfoils and to deposit hardface weld material on shrouded blade wear surfaces. (NADCAP accredited)
NDT (includes X-Ray) Non-Destructive Testing
Non-Destructive testing (NDT) is used to test turbine components without harming the component's ability to function within a gas turbine engine. NDT can be done to check for external cracks, internal defects, wall thickness and hole size. Some typical NDT processes include Fluorescent Penetrant Inspection (FPI), x-ray, ultrasonic inspection, magnetic particle inspection, and airflow. (NADCAP accredited)
Shot Peening
Shot peening improves fatigue properties by placing the external surface in compressive stress. It can also be used to modify external grain size by recrystallization. Media of controlled shape, size and density is propelled using automated machinery against the required locations of the part, causing residual compressive stress. The compressive stress acts as a barrier to crack formation and growth. (NADCAP accredited)
Electrical Discharge Machining (EDM)
A shaped electrode immersed in an insulating fluid is used to remove material by controlled electrical arcing against the part and flushing away the removed material. EDM allows accurate material removal for features that would be difficult to machine conventionally. (NADCAP accredited)
