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Optimization of the Mechanical Behaviour Under Tensile Stress of Spheroidal Cast Iron with Ferritic Matrix used in the Manufacture of Wind Turbine Hubs

Autor(es) y otros:
Álvarez Antolín, José FlorentinoAutoridad Uniovi; Asensio Lozano, JuanAutoridad Uniovi
Palabra(s) clave:

Grey cast iron

Spheroidal graphite

Fecha de publicación:
2017
Editorial:

Springer

Versión del editor:
https://doi.org/10.1007/s40962-016-0100-0
Citación:
International Journal of Metalcasting, 11(3), p. 513-522 (2017); doi:10.1007/s40962-016-0100-0
Descripción física:
p. 513–522
Resumen:

The aim of this study is the microstructural optimization of the toughness behaviour at sub-zero temperatures and the enhancement of the ductile behaviour under tensile stress of spheroidal graphite cast irons with a ferrite matrix used to manufacture hubs for horizontal axis wind turbines. The approach employed was a fractional design of experiments with 7 factors, 16 experiments and resolution IV. The research was conducted at an industrial scale on cubes with the same mass coefficient as that of the industrial parts to be enhanced. The main conclusion worth highlighting is that the use of nodulizers with traces of lanthanum enhances the toughness of the material at sub-zero temperatures and improves the ductility of these cast irons at the cost of lowering their yield strength. However, this negative effect may be offset by a decrease in the carbon equivalent to eutectic levels.

The aim of this study is the microstructural optimization of the toughness behaviour at sub-zero temperatures and the enhancement of the ductile behaviour under tensile stress of spheroidal graphite cast irons with a ferrite matrix used to manufacture hubs for horizontal axis wind turbines. The approach employed was a fractional design of experiments with 7 factors, 16 experiments and resolution IV. The research was conducted at an industrial scale on cubes with the same mass coefficient as that of the industrial parts to be enhanced. The main conclusion worth highlighting is that the use of nodulizers with traces of lanthanum enhances the toughness of the material at sub-zero temperatures and improves the ductility of these cast irons at the cost of lowering their yield strength. However, this negative effect may be offset by a decrease in the carbon equivalent to eutectic levels.

URI:
http://hdl.handle.net/10651/43554
ISSN:
2163-3193; 1939-5981
DOI:
10.1007/s40962-016-0100-0
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