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Surface integrity of bored super duplex stainless steel SAF 2507

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Abstract

This investigation explores the effect of some input cutting variables of boring process—cutting speed, feed rate, tool nose radius and coolant pressure—on the surface integrity of super duplex stainless steel grade SAF 2507. The surface integrity was evaluated by means of 3D surface roughness, residual stresses determined by X-ray diffraction, and work hardening using Vickers hardness. The most significant variable was the feed rate, which affected both the roughness parameters and the residual stresses. For the low level of feed rate and the higher nose radius tested the machined surfaces could be identified as Gaussian in terms of surface heights distribution with an insignificant work hardening due to the machining. In this fashion, a best combination of boring conditions could be indicated to reach the lowest roughness values with Gaussian surfaces and compressive residual stresses with a low level of work hardening.

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Acknowledgments

The authors would like to thank the support given by Robert Bosch Ltda for providing facilities. G. Pintaude acknowledges CNPq by granting from Project 312385/2014-5.

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Authors and Affiliations

  1. Sandvik, Rua João Scucato, 101, Curitiba, 82710-230, Brazil

    Fernando Morelo

  2. IF-PR Campus Paranaguá, Rua Antônio Carlos Rodrigues, 453, Paranaguá, 83215-750, Brazil

    Marina Izabelle Grabarski

  3. Departamento Acadêmico de Mecânica, Universidade Tecnológica Federal do Paraná (UTFPR-Campus Curitiba), Av. 7 de Setembro, 3165, Curitiba, 80230-901, Brazil

    Paulo André de Camargo Beltrão & Giuseppe Pintaude

Authors
  1. Fernando Morelo
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  2. Marina Izabelle Grabarski
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  3. Paulo André de Camargo Beltrão
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  4. Giuseppe Pintaude
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Corresponding author

Correspondence to Giuseppe Pintaude.

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Technical Editor: Márcio Bacci da Silva.

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Morelo, F., Grabarski, M.I., de Camargo Beltrão, P.A. et al. Surface integrity of bored super duplex stainless steel SAF 2507. J Braz. Soc. Mech. Sci. Eng. 39, 2649–2658 (2017). https://doi.org/10.1007/s40430-016-0642-3

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  • DOI: https://doi.org/10.1007/s40430-016-0642-3

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