Fe-Cr-C hardfacing alloys for high-temperature applications

L.-E. Svensson, B. Gretoft, B. Ulander and H.K.D.H. Bhadeshia


The microstructure and phase chemistry of a Fe-34Cr-4.5C wt% hardfacing alloy has been investigated using transmission electron microscopy and microanalytical techniques. The microstructure is found to consist of large primary M7C3 carbides in a eutectic mixture of austenite and more M7C3. The results indicate that the microstructure of the undiluted alloy becomes configurationally frozen at a temperature of about 1150oC during deposition by the manual metal arc welding technique. This allows the metastable austenite phase to contain a large chromium concentration (16 to 17 wt %), thus imparting good corrosion and oxidation resistance. Experimental data on the partitioning of chromium, manganese and silicon between the carbide phases are discussed in the context of the high-temperature stability of the alloy.

Journal of Materials Science, 21 (1986) 1015-1019.

Download PDF file of paper (4 Mb)

Download PDF file of energy dispersive X-ray analysis results (2 Mb)

PT Group Home Materials Algorithms Any Valid CSS!