Análise de falhas em tubos sem costura de aço St52 utilizados em motores diesel / Failure analysis in seamless pipes of St52 steel used in Diesel Engines

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

26/07/2011

RESUMO

The carbon steel with high manganese in accordance with Din 1.0580 (St52) seamless 8 x 3 mm diameter has been used into fuel injection system of the electronic diesel king with pressure up to 1300 bar. This tube presented short life on durability tests due to inner cracks created during rolling process. The tube produced in Brazil and used nowadays in was compared with an imported one using a fatigue test. It is shown on this work the manufacturing tube process, the fatigue test applied to the national and imported tubes and the e effects. The results showed that the national tube does not meet the necessary requirements and the immediate solution is to use the imported one. It is recommended further used on the rolling process to reduce the internal roughness of the tubes produced in Brazil

ASSUNTO(S)

tubos fadiga laminação (metalurgia) aço - metalografia motor diesel seamless tube diesel fuel injection internal roughness autofrettage and fatigue

ACESSO AO ARTIGO

Documentos Relacionados