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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1720| FILLER MATERIALS FOR BRAZING WIDE CRACKS IN IN738 SUPERALLOYS | |
| ANA MARIA ARIZMENDI MORQUECHO AARON CHAVEZ VALDEZ | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Brazing | |
| We report the results of a complex microstructural study of four selected filler materials to achieve efficient reparation of wide cracks in surface of IN738 superalloys. Filler materials studied were represented as a mixture of special metallic powder/paste and powder of Nibase alloys. One of the mixture components has a low melting point, so that it will melt during the process ensuring good isothermal brazing. The filler material with the better adhesion to the substrate and microstructure was chosen to repair a wide crack on the surface of IN738 superalloy, with further study of the mechanical properties of the joint trough hardness measurements. The optimized compound displayed greater hardness of filler material in comparison with superalloy base, which is indicative of a strong metallurgical union between them. The suggested procedure by vacuum brazing allows achieving better repair for the case of wide cracks, which are difficult to handle with conventional techniques. In the similar way, one can also perform complete refurbishment of large surface area, which may be particularly useful in the large industrial gas turbines that contain many components manufactured of superalloys. | |
| 2010 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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| Fichero | Tamaño | Formato | |
|---|---|---|---|
| Articulo brazing SYV 2010.pdf | 1.38 MB | Adobe PDF | Visualizar/Abrir |