Minimization of the Thermal Impact in the Laser Welding of Dissimilar Stainless Steels
| Autor: | José Luis Ocaña, Francisco Cordovilla, Alejandro Tur, Ángel García-Beltrán, M. Díaz, Ignacio Angulo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:TN1-997
laser pulses Materials science dissimilar steels Mechanical engineering 02 engineering and technology Welding 01 natural sciences Corrosion law.invention law 0103 physical sciences General Materials Science stainless steel Joint (geology) lcsh:Mining engineering. Metallurgy corrosion 010308 nuclear & particles physics Metals and Alloys Laser beam welding 021001 nanoscience & nanotechnology Thermal conduction Laser Microstructure laser welding 0210 nano-technology Keyhole |
| Zdroj: | Metals, Vol 8, Iss 8, p 650 (2018) Metals Volume 8 Issue 8 |
| ISSN: | 2075-4701 |
| Popis: | Laser welding of dissimilar stainless steels is of interest when mechanical, corrosion, or esthetical requirements impose the use of a high-performance stainless steels, while production-cost requirements prevent using expensive materials in all the parts of a given device. The compromise may lead to the use of the most expensive material in critical areas and the cheapest one in the remaining. Their union can be materialized by laser-pulsed welding. It has intrinsic difficulties derived from the different physical and chemical properties of the steels, and from the need of preserving the protective passive layer. The present work achieves a welded joint with minimum thermal impact by means of laser pulses, capable of preserving the corrosion resistance of the involved stainless steels. The influence of the parameters to define static and dynamic pulses on the material and on the welding regime, keyhole, or heat conduction, is studied. It is used to calculate the overlapping factor of the pulses on the basis of the real dimensions of the melted area. A continuous joint has been built with dynamic pulses. The corrosion resistance of it has been checked showing a similar behavior to the non-heated material. The microstructure of the optimized joint is associated with a reduced HAZ while its mechanical behavior is suitable for its real application. |
| Databáze: | OpenAIRE |
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