An experimental study of carbide-austenite equilibria in iron- base alloys with Mo,Cr, Ni,and Mn in the temperature range 1173 to 1373 K

The carbide/austenite equilibria were studied experimentally in the alloy systems Fe-Mo-Cr-C, Fe-Mo-Ni-C, Fe-Mo-Mn-C, Fe-Cr-Mn-C, Fe-Cr-Ni-C and Fe-Cr-Ni-Mn-C in the temperature range 1173 to 1373 K. The carbides were identified by microscopic examination after etching and by X-ray analysis of carbide residues obtained by electrolytic extraction. The alloy contents in the individual phases were measured with a microprobe technique. The partitioning of the alloying elements were evaluated and phase diagrams at constant temperature and carbon activity were constructed from the experimental information. Formerly Research Assistant at the Division of Physical Metallurgy, The Royal Institute of Technology, S-10044 Stockholm 70, Sweden