Determining Threaded Machine Element Fabrication Technology by Pulsed Thermography

Abstract

Non-destructive testing methods, including pulsed infrared thermography, have become quite common in materials evaluation. The method is suitable for checking the quality of the surface treatment of the material structure up to a certain depth and is increasingly applied in the areas of system maintenance and condition assessment of machine elements. Thus, when installing spare parts (screws) for military purposes, for example in airplanes, helicopters, tanks, or armored vehicles, as well as for commercial purposes, for example, excavators or other machines, it is necessary to inspect these parts additionally to be sure of their quality. The paper discusses the applicability of pulse infrared thermography in the quality control of screws, through the determination of the technology of making standard threaded joints (by rolling or cutting), as well as the technology of the final surface treatment of screws with a cadmium layer.