Abstract
Using high resolution techniques, such as, 3D atom probe tomography, transmission electron microscopy and synchrotron radiation, the continuous tempering process of a 50CrMo4 steel is analyzed. Differences of continuous heating compared to isothermal holding at certain tempering temperatures are discussed. Focus is laid on in-depth characterization of phase development and carbon redistribution effects, such as, segregation and clustering. The results of this work suggest that segregation is the dominant effect at low temperatures (< 150 °C), while cluster formation within these segregated areas is prominent at intermediate temperatures (150–250 °C). Epsilon carbide is formed during continuous heating with off-stoichiometric chemical composition (270–350 °C). It transforms finally into cementite (T > 350 °C).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
