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Influence of post-weld heat treatment in buttered interface of AISI 4130 and Inconel alloy welded joints

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Abstract

Dissimilar joints are often used by the oil and gas industry to join components such as forged flanges and piping used in subsea operations. The technique consists of buttering the forged flange before the closure weld is made. After the buttering runs, the forged flange is subjected to a post-weld heat treatment. However, the true effectiveness of this procedure has been questioned after failures began to occur in the fusion zone of the forging piece and nickel alloy. The present work aims to investigate the influence of post-weld heat treatment on the mechanical and microstructural behavior of the buttered dissimilar interface of AISI 4130 steel with nickel alloys. Gas metal arc welding processes in continuous and pulsed current modes were employed. AWS ERNiCrMo-3 (Inconel 625) and AWS ERNiCrMo-15 (Inconel 725) solid wires were used as filler metals. Post-weld heat treatment was performed on the buttered plates. The microstructure at the interface of the buttered fusion line were characterized by optical microscopy and scanning electron microscopy. Microhardness analyses were performed at the interface of the buttered weld. The results showed that gas metal arc welding process with pulsed current mode and Inconel 625 as filler metal showed lower levels of dilution and greater control of the partially diluted zones, proving to be more suitable for this type of application. It was also found that regardless of the welding procedure, post-weld heat treatment made the interface more brittle.

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Acknowledgements

The authors of the work would like to thank the National Council for Scientific and Technological Development (CNPq) of Brazil for the financial support to carry out the research.

Funding

This research was supported by the National Council for Scientific and Technological Development (CNPq) of Brazil.

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Authors and Affiliations

  1. Universidade Federal da Paraíba, Paraíba, Brazil

    Roneles de Santana Silva & José Hilton Ferreira da Silva

  2. Universidad de Oriente, Santiago de Cuba, Cuba

    Mario César Sánchez Orozco

  3. Universidade Tecnologica Federal de Paraná, Curitiba, Brazil

    Hipolito Domingo Carvajal Fals

Authors
  1. Roneles de Santana Silva
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  2. Mario César Sánchez Orozco
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  3. Hipolito Domingo Carvajal Fals
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  4. José Hilton Ferreira da Silva
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Contributions

Conceptualization: R. de Santana Silva, H. D. Carvajal Fals, J. H. Ferreira da Silva. Data curation: R. de Santana Silva, M. C. Sánchez Orozco, H. D. Carvajal Fals, J. H. Ferreira da Silva. Formal analysis: R. de Santana Silva, M. C. Sánchez Orozco, H. D. Carvajal Fals, J. H. Ferreira da Silva. Investigation: R. de Santana Silva, M. C. Sánchez Orozco, H. D. Carvajal Fals, J. H. Ferreira da Silva. Methodology: R. de Santana Silva, H. D. Carvajal Fals, J. H. Ferreira da Silva. Supervision: H. D. Carvajal Fals. Validation: M. C. Sánchez Orozco, H. D. Carvajal Fals. Writing–original draf: R. de Santana Silva, H. D. Carvajal Fals, J. H. Ferreira da Silva. Writing–review and editing: M. C. Sánchez Orozco, H. D. Carvajal Fals.

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Correspondence to Mario César Sánchez Orozco.

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de Santana Silva, R., Sánchez Orozco, M.C., Carvajal Fals, H.D. et al. Influence of post-weld heat treatment in buttered interface of AISI 4130 and Inconel alloy welded joints. Int J Adv Manuf Technol 126, 2905–2916 (2023). https://doi.org/10.1007/s00170-023-11274-8

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