| Revue: | Materials research |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312884 |
| ISSN: | 1516-1439 |
| Autores: | Fernández Fuentes, Alfonso Rafael1 Alcantara, Nelson Guedes de2 Haro Rodríguez, Sergio3 López Ibarra, Alejandro |
| Instituciones: | 1Universidad Central "Marta Abreu" de Las Villas, Centro de Investigaciones en Soldadura, Santa Clara, Villa Clara. Cuba 2Universidade Federal de Sao Carlos, Departamento de Engenharia de Materiais, Sao Carlos, Sao Paulo. Brasil 3Universidad Autónoma de Zacatecas, Unidad Académica de Ingeniería, Zacatecas. México |
| Año: | 2006 |
| Periodo: | Abr-Jun |
| Volumen: | 9 |
| Número: | 2 |
| Paginación: | 153-158 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Revisión bibliográfica |
| Enfoque: | Analítico |
| Resumen en inglés | This article presents a literature overview and discusses a practical case involving the effect of in service weld repair on the performance – behavior under creep conditions and remanent life – of low alloy CrMo steel steam pipelines with longstanding use. According to the specialized literature, several authors argue that the in service weld repair of low alloy CrMo steel steam pipes can be done successfully, while others disagree, reporting a reduction of up to 30% or more in the remanent life. According to the case analyzed here, which involves the weld repair of a 1¼Cr½Mo ferrite-pearlite steel steam pipe operating for 20 years at 480 °C, in service weld repair leads to the intragranular precipitation of Fe2MoC-type carbides and decreases the solute concentration of the ferrite in the base metal adjacent to the welded joint, thereby considerably reducing the pipeline's remanent life, since the estimated rupture time for the service-aged material is 3.6 times that estimated for the weld-repaired joint |
| Disciplinas: | Ingeniería |
| Palabras clave: | Ingeniería industrial, Ingeniería mecánica, Soldadura, Acero, Aleaciones, Tuberías, Vida útil, Rendimiento |
| Keyword: | Engineering, Industrial engineering, Mechanical engineering, Welding, Steel, Alloys, Pipelines, Shelf life, Yield |
| Texte intégral: | Texto completo (Ver HTML) |
