Effect of induction heating on steel seamless tubes used in diesel enginers / Efeito do aquecimento por indução eletromagnetica de tubos sem costura utilizados em motores a diesel

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This paper presents a study about the effect of cold upsetting and electromagnetic induction heating on microstructure and hardness characteristics of steel seamles pipe. This pipe studied is applied in fuel flow transport of high pressure fuel system. As fuel is transported the pipe sealing characteristic is critical on assembly interfaces of this pipe. This interface has conic profile produced at upsetting process. The hardness values observed on cold upsetting pipe has a trend to be higher than raw material. There microstructure changed can cause leakage if sealing contact area between conic profile of components has not accommodation enough, being high pressure pump or "rail". The hardness increase can reduce this sealing contact reducing deformation after tight-fitting. The induction heating process under controlled conditions can furnish change of microstructure and hardness material suitable for leak-tightness

ASSUNTO(S)

metal formiing machinery pressão alta (tecnologia) metal formiing heat treatment of metals metais - tratamento termico high pressure (technology) maquinas para conformação de metais conformação de metais

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