Stud welding repair of superalloy components

摘要

Superalloy components are joined or repaired by mating a recess formed in one component substrate with a corresponding projection formed in another component along a contact surface and welding them together with a stud welding apparatus. A mating superalloy repair stud is formed with a stud projection whose profile conforms to the substrate recess profile along a corresponding contact surface. Both the stud and substrate are coupled to a stud welding apparatus, with the stud projection and substrate recess oriented in an opposed spaced relationship with a gap there between. The stud welding apparatus passes current between the stud projection and recess and forms an arc there between, to melt their respective opposed surfaces. The melted stud projection and substrate recess opposed surfaces are pressed into contact with each other with the stud welding apparatus, forming a weld there between.

主权项

1. A joined superalloy component comprising:
a superalloy substrate defining a recess having a recess profile; a mating superalloy stud having a stud projection captured within the substrate recess, with a projection profile conforming with the entire substrate recess profile along a contact surface; and the substrate and stud affixed to each other along the entire contact surface by a process of stud welding by:
inserting the stud and substrate in a stud welding apparatus;orienting the stud projection and substrate recess in an opposed spaced relationship with a gap there between;passing current between the stud projection and recess and forming an arc there between with the stud welding apparatus;melting the opposed stud projection and substrate recess opposed surfaces; andpressing the melted stud projection and substrate recess opposed surfaces into contact with each other along the entire contact surface, thereby forming a weld there between and extruding excess weld outside of the recess.