Aluminizing Process of Marine Engine Steel and Surface Alloys

Chromizing-aluminizing and Chromizing-siliconizing Coating of a Ferritic Steel

The Effect of Platinum Layer and Aluminizing Process on Surface Roughness of Coated Superalloy by Pt-Al

In this study, the effect of platinum-aluminide coating parameters on surface roughness of nickel-based superalloy Rene®80 was evaluated. For this purpose, different thicknesses of Pt-layer (2, 4, 6 and 8µm) were plated on the Samples. Then diffusion aluminide coating in two types, high tempeature-low activity and low temperature-high activity was performed. The results of structural investigat...

Eddy current residual stress profiling in surface-treated engine alloys

Recent research results indicate that eddy current conductivity measurements can be exploited for nondestructive evaluation of subsurface residual stresses in surface-treated nickel-base superalloy components. According to this approach, the depth-dependent electric conductivity profile is calculated from the measured frequency-dependent apparent eddy current conductivity spectrum. Then, the re...

Neural Network Modeling of Oxidation Kinetics in Air of Steel- T21 Alloy Coated by Simultaneous Germanium-Doped Aluminizing-Siliconzing Process

In this work a pack cementation of germanium-doped aluminum and silicon coatings on low alloy steel type-T21 has been applied. This gives significant improvement in the oxidation. Steel-T21 was coated with germanium-doped aluminizing-siliconizing. Diffusion coating was carried out at 1050C for 6 h under an Ar atmosphere by simultaneous germanium-doped aluminizing-siliconzing process. Cyclic oxi...

Modification of EN9 Steel Surface by Salt Bath Nitrocarburizing Process

Nitrocarburizing is a thermochemical treatment which involves the diffusional addition of nitrogen and carbon to the surface of ferrous materials. Usually carried out at temperatures within the ferritic phase field of the Fe-N-C system, i.e. below 593 °C, the treatment improves the resistance to scuffing through the development of a compound layer at the surface consisting predominantly of epsi...