Investigation of the Effects of Low‐Pressure Carburizing Process Parameters on Microstructural Evolution by Means of In Situ Synchrotron X‐Ray Diffraction

In situ X‐ray diffraction experiments during low‐pressure carburizing processes are performed at the German Electron Synchrotron Facility, Beamline P07, in Hamburg, Germany, with a specially developed process chamber. Microstructural evolution is precisely analyzed based on data, and several parameters varied. The investigations focus boost diffusion steps which carbon donor gas interacts hot steel surface atoms diffuse through sample. An increased temperature leads to higher absorption step, especially early stages of process. Regardless parameters, austenite saturation reached few seconds. Therefore, longer step duration and/or acetylene amount does not directly increase profile; instead, this would only carbides formed surface, contribute profile by dissolution following steps. shorter high number recommended for efficiency. cementite formation rate shows similar trend saturation. It very fast beginning then stays almost constant. introducing furnace after that point has no positive effect carburization.