Nickel based hardfacing alloys Colmonoy-5 and Colmonoy-6 deposited on type 316L austenitic stainless steel substrate using the gas tungsten arc welding process, were characterised for their microstructure and hardness variations across the deposit/substrate interface, and for identification of the principal precipitates present in these hardface deposits. Hardness measurements and electron probe microanalysis (EPMA) across the interface revealed the presence of a dilution zone 2.5 mm wide in the Colmonoy-6 deposit and 1.5 mm wide in the Colmonoy-5 deposit. EPMA and X-ray diffraction studies of the precipitates showed that the blocky type precipitates were chromium borides and the needle-like precipitates were chromium carbides. Also, stress relief heat treatment at 1123 K for 4 h was found to have no significant effect on the hardness of these hardface deposits.
- Nickel based alloy
Das, C. R., Albert, S. K., Bhaduri, A. K., Sudha, C., & Terrance, A. L. E. (2005). Characterisation of nickel based hardfacing deposits on austenitic stainless steel. Surface Engineering, 21(4), 290-296. https://doi.org/10.1179/174329405X40867