Estudo do comportamento tribológico do aço AISI H13 submetido a tratamento termoquímico de boretação / Study of tribological behavior of AISI H13 steel subjected to boriding thermochemical treatment

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

18/06/2012

RESUMO

In this work, solid boriding thermochemical treatment was carried out using Ekabor 1-V2 and one blend as boriding agents and heat treatment of quenching and tempering of AISI H13 tool steel in order to compare and evaluate the tribological behavior and the properties acquired for four studied conditions, that were: Ekabor powder boriding, Ekabor powder boriding followed by quenching and tempering, boriding with a blend as boriding agent and quenched and tempered condition. Sliding wear tests were performed in pin-on-disc apparatus in order to evaluate the friction coefficient and the volume of material removed (measured with the aid of a profiling equipment). After the wear tests the samples were transversally cut for metallographic evaluation by optical and scanning electron microscopy. X-ray diffraction was used to confirm the formation of borided layer. The results showed that the boriding treatments, regardless the boriding agent used, are effective in increasing wear resistance. The thickness of borided layer was greater for boriding with Ekabor powder than the blend agent, this one, nevertheless, showed significant improvement in wear resistance compared to the quenched and tempered condition. There are several wear mechanisms that take place in the sliding wear test but the adhesive wear mechanism was reduced by boriding treatment.

ASSUNTO(S)

boretação sólida comportamento tribológico aisi h13 engenharia de materiais e metalurgica solid boriding tribological behavior aisi h13

ACESSO AO ARTIGO

Documentos Relacionados