Shoja Razavi, S.R.

[ 1 ] - Investigating the microstructure and hardness of 17-4PH steel and Stellite cladded by direct laser deposition process on 17-4PH steel substrate

The purpose of this research is to laser cladding of stellite6 and stainless steel 17-4PH powders on the substrate of stainless steel 17-4PH, and investigate its solidification microstructure. The results showed that the microstructure of the stellite6 cladding has a cobalt solid solution ground phase with an FCC structure and Cr7C3 and Cr23C6 carbides. Also, the values of the primary dendrit...

[ 2 ] - Investigating the microstructure and hardness of 17-4PH steel and Stellite cladded by direct laser deposition process on 17-4PH steel substrate

The purpose of this research is to laser cladding of stellite6 and stainless steel 17-4PH powders on the substrate of stainless steel 17-4PH, and investigate its solidification microstructure. The results showed that the microstructure of the stellite6 cladding has a cobalt solid solution ground phase with an FCC structure and Cr7C3 and Cr23C6 carbides. Also, the values of the primary dendrit...

[ 3 ] - Synthesis of WC-8Co cermet powder in WO3-Co3O4-C system by in situ carbothermic solid reduction method under hydrogen atmosphere: (phase, microstructural and thermodynamic analysis)

WC-Co cermets are among the advanced engineering materials that are considered for their special properties such as abrasion resistance and high hardness. The aim of this study was to determine the optimal amount of carbon in raw materials and industrial production of WC-8Co cermet powder from metal oxides WO3, Co3O4 and activated carbon by solid carbothermic reduction method in situ and under ...