Hardness optimization of boride diffusion layer on ASTM F-75 alloy using response surface methodology

J.L. Arguelles-Ojeda ^[1] ; A. Máqruez-Herrera ^[2] ; A.L. Saldaña-Robles ^[2] ; M.A. Corona-Rivera ^[1] ; J. Moreno-Palmarin ^[2]
1. [1] Universidad Autónoma de San Luis Potosí
  
  Universidad Autónoma de San Luis Potosí
  
  México
2. [2] Universidad de Guanajuato
  
  Universidad de Guanajuato
  
  México
Localización: Revista Mexicana de Física, ISSN-e 0035-001X, Vol. 63, Nº. 1, 2017, págs. 76-81
Idioma: español
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Resumen
- In this study, the Response Surface Methodology (RSM) and Central Composite Design (CCD) were used to optimize the hardness of boride diffusion layer on ASTM F-75 alloy (also called Haynes alloy). A boronizing thermochemical treatment was carried out at different temperatures and for different time periods. Hardness tests were conducted. The boride diffusion layer was verified by the X-ray diffraction (XRD) analysis indicating the formation of CoB, Co_(2)B, CrB and Mo_(2)B phases. An optimal hardness of 3139.7 HV was obtained for the samples subjected to the boriding process for a duration of 6.86 h at 802.4◦C.