A METHOD OF HEAT TREATING A SUPERALLOY COMPONENT AND AN ALLOY COMPONENT

摘要

A method of heat treating a superalloy component comprises solution heat treating the component at a temperature below the gamma prime solvus temperature to produce a fine grain structure in the component. Insulation is placed over a first area of the component to form an insulated assembly. The insulated assembly is placed in a furnace at a temperature below the solvus temperature and maintained at that temperature for a predetermined time to achieve a uniform temperature in the component. The temperature is increased at a predetermined rate to a temperature above the solvus temperature to maintain a fine grain structure in a first region, to produce a coarse grain structure in a second region and to produce a transitional structure in a third region between the first and second regions of the component. The insulated assembly is removed from the furnace when the second region of the component has been above the solvus temperature for a predetermined time and/or the first region of the component has reached a predetermined temperature.