Abstract
During a study of the combustion process of a direct polarity electric arc, a directly proportional dependence of the electric current value on the degree of cold plastic deformation of carbon steel used as an electrode was found. To calculate the value of the electric current during arc burning, in the indicated ratio, it was proposed to replace the surface tension force of the liquid metal with the surface tension of ferrite of plastically deformed carbon steel. Calculation of the ferrite’s surface tension value on the deformation degree of the steel under study through the size of the coherent scattering regions was used to explain the observed dependence of the electric current during arc burning. From the analysis of the considered correlation ratios, it was found that with an increase in the cold deformation degree, the refinement of the coherent scattering regions results in the ferrite’s surface tension increase and consequently, to an increase in the electric current during arc burning. Comparative analysis of the obtained results of calculating the value of electric current during arc burning through the surface tension of ferrite of cold-deformed carbon steel showed a fairly good coincidence with experimental data. The differences did not exceed 9%.
Highlights
Humans, in recent times, are being increasingly integrated with technology, becoming undoubtedly more dependent on technology
Forecasting object reliability is a crucial issue in present times
This article aims to forecast the number of failures of the selected elements of the steering system of a selected motor vehicle using the aforementioned method
Summary
In recent times, are being increasingly integrated with technology, becoming undoubtedly more dependent on technology. Forecasting object reliability is a crucial issue in present times. Forecasting the future values of the symptoms of machinery technical condition is an issue of importance that has been widely discussed in reference literature [3, 17,18,19,20, 25]. One of the methods of object reliability assessment is the grey system theory. The theory is used in machine condition forecasting and in economics [3]. This method can be used to calculate the number of failures, as well as to calculate the wear of mating parts, and the vibrations of engines and rolling elements
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