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 ...

A method to image near-surface hardness profiles of heat-treated case-hardened steels using laser infrared photothermal radiometric phase imaging is described. It is shown that thermophysical and mechanical transverse inhomogeneity profiles in industrial case hardened steel samples are well correlated. Phase surface scanning imaging leads to a practical criterion for assessing transverse hardne...

There are a number of ways to improve the corrosion and abrasion resistance of metals, including alloying, anodizing, nitriding and application of protective thin films. Alloying involves generating a binary phase diagram to determine the optimum composition and temperature dependence. For example, copper alloys known as “bronzes” offer high strength, abrasion resistance and high temperature co...