The ASTM A-36 steel is the main alloy, used in metal-mechanical industry. In present study, effect of boron-carbon coating on hardness and corrosion resistance was reported. Boronizing thermochemical treatment carried out at 950 °C for 4 h followed by carburizing process 930 6 h. study conducted using polarization technique (Tafel) electrochemical impedance spectroscopy (EIS), which employed a ...

Fatigue behavior of case hardened parts depend to a great extent on the type of residual stresses developed in the components. Topography and metallurgical effects were the two elements which contribute much to surface integrity. Micro hardness of the gas carburized (EN 33 and EN 36) and Induction hardened (AISI 1040 and AISI 6150) specimens obtained during experiments, showed that there was gr...

Since the sub-axis of machine tool spindles subjected to fatigue loading, the effects of different surface heat treatments on fatigue behavior of 16MnCr5 steel have been investigated in the current work. After the test specimens were prepared from the steel, the surface heat treatments; carburizing, carbonitriding and a practical type of treatment involving the first nitriding then carburizing ...