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Article

An Analysis of the Weldability of Ductile Cast Iron Using Inconel 625 for the Root Weld and Electrodes Coated in 97.6% Nickel for the Filler Welds

ITM, Universitat Politècnica de València, Valencia 46022, Spain
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Academic Editor: Giuseppe Casalino
Metals 2016, 6(11), 283; https://doi.org/10.3390/met6110283
Received: 26 July 2016 / Revised: 5 November 2016 / Accepted: 14 November 2016 / Published: 18 November 2016
This article examines the weldability of ductile cast iron when the root weld is applied with a tungsten inert gas (TIG) welding process employing an Inconel 625 source rod, and when the filler welds are applied with electrodes coated with 97.6% Ni. The welds were performed on ductile cast iron specimen test plates sized 300 mm × 90 mm × 10 mm with edges tapered at angles of 60°. The plates were subjected to two heat treatments. This article analyzes the influence on weldability of the various types of electrodes and the effect of preheat treatments. Finally, a microstructure analysis is made of the material next to the weld in the metal-weld interface and in the weld itself. The microstructure produced is correlated with the strength of the welds. We treat an alloy with 97.6% Ni, which prevents the formation of carbides. With a heat treatment at 900 °C and 97.6% Ni, there is a dissolution of all carbides, forming nodules in ferritic matrix graphite. View Full-Text
Keywords: weldability; pre-heating; ductile cast iron; microstructure; root pass weldability; pre-heating; ductile cast iron; microstructure; root pass
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MDPI and ACS Style

Cárcel-Carrasco, F.-J.; Pérez-Puig, M.-A.; Pascual-Guillamón, M.; Pascual-Martínez, R. An Analysis of the Weldability of Ductile Cast Iron Using Inconel 625 for the Root Weld and Electrodes Coated in 97.6% Nickel for the Filler Welds. Metals 2016, 6, 283. https://doi.org/10.3390/met6110283

AMA Style

Cárcel-Carrasco F-J, Pérez-Puig M-A, Pascual-Guillamón M, Pascual-Martínez R. An Analysis of the Weldability of Ductile Cast Iron Using Inconel 625 for the Root Weld and Electrodes Coated in 97.6% Nickel for the Filler Welds. Metals. 2016; 6(11):283. https://doi.org/10.3390/met6110283

Chicago/Turabian Style

Cárcel-Carrasco, Francisco-Javier, Miguel-Angel Pérez-Puig, Manuel Pascual-Guillamón, and Rafael Pascual-Martínez. 2016. "An Analysis of the Weldability of Ductile Cast Iron Using Inconel 625 for the Root Weld and Electrodes Coated in 97.6% Nickel for the Filler Welds" Metals 6, no. 11: 283. https://doi.org/10.3390/met6110283

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