The improvement in hardness of X12CrNiMo martensitic stainless steel laser alloyed with 99.9% pure titanium carbide, stellite 6 and two cases of premixed ratio of titanium carbide and stellite 6 [TiC (30 wt.%)- stellite 6 (70 wt.%) and TiC (70 wt.%)- stellite 6 (30 wt.%)] were examined. The powders were supplied through a pneumatically driven powder delivery system with a 4.4 kW continuous wave (CW) Nd:YAG laser. The microstructures of the alloyed zones were investigated by x-ray diffractometer (XRD), energy dispersive spectroscopy (EDS) and scanning electron microscopy (SEM). The alloyed zones obtained by alloying with premixed ratio of 70 wt.% TiC and 30 wt.% stellite 6 were free from dilution and crack that were in those of pure stellite 6. A significant increase in Vickers hardness value compared with that of the substrate was achieved with the powders and their premixed ratios; 608 HVN for TiC and 503 HVN for stellite 6, 763 HVN for 30 wt.% TiC and 1025 HVN for 70 wt.% TiC.
Reference:
Adebiyi, DI, Fedotova, T, Pityana, SL and Popoola, API. 2011. Improved hardness of laser alloyed X12CrNiMo martensitic stainless steel. International Journal of the Physical Sciences, Vol 6(14), pp 3336-3346
Adebiyi, D., Fedotova, T., Pityana, S. L., & Popoola, A. (2011). Improved hardness of laser alloyed X12CrNiMo martensitic stainless steel. http://hdl.handle.net/10204/5324
Adebiyi, DI, T Fedotova, Sisa L Pityana, and API Popoola "Improved hardness of laser alloyed X12CrNiMo martensitic stainless steel." (2011) http://hdl.handle.net/10204/5324
Adebiyi D, Fedotova T, Pityana SL, Popoola A. Improved hardness of laser alloyed X12CrNiMo martensitic stainless steel. 2011; http://hdl.handle.net/10204/5324.
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