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Characterization of Different Surface Layers Produced by Solid Boron-Nitro-Carburizing Thermochemical Treatment on AISI 1020

Characterization of Different Surface Layers Produced by Solid Boron-Nitro-Carburizing Thermochemical Treatment on AISI 1020

Authors :
Alexandre Galiotto
Ariane Rocha Rosso
Elisangela Aparecida dos Santos de Almeida
Anael Preman Krelling
Júlio César Giubilei Milan
César Edil da Costa
Source :
Materials Research, Vol 22, Iss 5 (2019)
Publication Year :
2019
Publisher :
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol), 2019.

Abstract

The aim of this study is to obtain and characterize surface layers on low carbon steel with the pack boron-nitro-carburizing process. Different mixtures of commercial powders (Turbonit® and Ekabor®) were used to investigate the case properties, microstructure and phases formation on AISI 1020 steel. A series of experiments were conducted in solid medium with powders blend, with weight proportions of 0/100;25/75;50/50;75/25;100/0 at temperatures of 1000 and 1100º C for 2 and 10 hours. Roughness measurement of all treated specimens was assessed to compare with pre-treatment condition. Hardness profile and comparative analysis of phase structure, morphology and composition was carried out to treatment conditions. Optical microscopy shows differences on layers surface, depth and microstructure case - diffusion zone. Results found indicated that for the same treatment time and temperature, hardness was changed, but the diffusion case depth was kept similar. DRX and XPS indicated the formation of boron nitride after certain treatments.

Details

Language :
English
ISSN :
15161439 and 19805373
Volume :
22
Issue :
5
Database :
Directory of Open Access Journals
Journal :
Materials Research
Publication Type :
Academic Journal
Accession number :
edsdoj.66bf8826ab4f44de8fa7d35bb2c30deb
Document Type :
article
Full Text :
https://doi.org/10.1590/1980-5373-mr-2019-0316