Formation of Hard Layers in Tool Steels

N. Lopez-Perrusquia; M. A. Doñu-Ruiz; S. Rodríguez-González; D. L. Rosado Cruz; Frumencio Vasquez-Ramírez

doi:10.4028/www.scientific.net/AMR.690-693.2059

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 690-693Formation of Hard Layers in Tool Steels

Formation of Hard Layers in Tool Steels

Abstract:

In the present study, identify the fracture toughness and strength adhesion of borided layers on grade tools steels by Boronizing, two commonly used steel AISI 4140 and AISI 9840 are considered, the steels contain 1.0 - 0.8 wt% Cr and 0.20 - 0.25 wt% Mo, respectively. The formation of the borided layers was carried out by the powder pack boriding process at a temperature range of 1273 K for 4, 6 and 8 h. X-ray diffraction analysis revealed peak of FeB, Fe2B and CrB, the Fracture toughness of the layers is estimated at 15 and 30 um from surface using four different Vickers indentation loads, using Palmqvist crack model, the adherence of the layer/substrate was evaluate in qualitative form though the Rockwell C. The fracture toughness of the borides depends strongly on temperature and time bronzing. Also, good adhesion is obtained around the Rockwell C indentation prints on the borided layer-substrate-interface.

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Periodical:

Advanced Materials Research (Volumes 690-693)

Pages:

2059-2062

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.690-693.2059

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Online since:

May 2013

Authors:

N. Lopez-Perrusquia, M. A. Doñu-Ruiz, S. Rodríguez-González, D. L. Rosado Cruz, Frumencio Vasquez-Ramírez

Keywords:

Adhesion, Boriding, Fracture Toughness, X-Ray Diffraction (XRD)

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