To investigate the microstructure and damage of friction-fatigued carburized martensitic steels for reliability remanufacturing parts, retained austenite (γ) phase residual stress were characterized by X-ray diffraction (XRD) scanning electron microscopy (SEM). We evaluated their changes before after roller pitching tests, operation gear parts.

Carburizing is the main damage form of ethylene cracking furnace tubes. In this process, microstructure tube would change and element diffuses redistributes. After serving for about 41000h, radiation section a plum blossom SC-1 tubular from petrochemical company was tested analyzed in article. Results show that higher service temperature, more serious carburizing tube. inner-wall carburized zon...

Recent technological development of utilizing an active screen made solid carbon for plasma-assisted thermochemical diffusion treatments opens up new possibilities control over the in situ generated treatment environment to guarantee reproducible conditions and material responses. Until now, investigations active-screen plasma nitrocarburizing (ASPNC) using manufactured from focused on influenc...