Sprayed weld strip for improved weldability

摘要

A method for welding to a superalloy material without causing cracking of the material. The method includes the steps of depositing a weld strip ( 18 ) of a weldable material onto a superalloy substrate material ( 12 ) using a spray deposition process ( 20 ) and then forming a weldment ( 26 ) to the weld strip. None or a controlled amount of the substrate material ( 12 ) is melted during the weld in order to maintain the concentration of strengthening elements in the local melt within a zone of weldability. The spray deposition process may be a thermal process such as HVOF or a cold spray process. A groove ( 16 ) may be formed in a surface ( 10 ) of the superalloy substrate material to receive the weld strip. A diffusion heat treatment step may be used to improve adhesion between the weld strip and the superalloy material.