| 摘要 |
PROBLEM TO BE SOLVED: To provide a braze alloy composition permitting brazing at high temperatures without degrading a superalloy substrate used in an extreme environment, such as a hot-gas-path airfoil in a gas turbine, reducing the brittleness of the borides or intermetallic compounds formed during the brazing process, and improving the mechanical properties (including, for example, ductility) of the braze joint. SOLUTION: The nickel-based braze alloy composition comprises: 9 to 25% chromium by weight; 5 to 45% hafnium by weight; and 0.05 to 6% boron by weight. The cobalt-based braze alloy composition comprises: 9 to 25% chromium by weight; 5 to 56% hafnium by weight; and 0.05 to 6% boron by weight. The braze alloy may permit joining/repairing of superalloy articles with complex shape and may be used in high temperature applications. COPYRIGHT: (C)2007,JPO&INPIT |
