Abstract
9ХФМ steel was irradiated with a high-current electron beam. The high-current electron beam was obtained in the TEMP-A accelerator. The irradiation was performed for various samples of the material of a ball mill drum. Part of the samples were taken from the surface of the balls, which had different degrees of wear. Samples taken from the depth of the balls, which is equal to half the diameter, were also irradiated. Microhardness measurements, metallographic, and fractographic analysis were used to study mechanical and microstructural changes. In all cases, a change in hardness was detected. The degree of change in hardness is different for different samples. Based on fractographic analysis, using SEM microscopy, one of the mechanisms that contribute to increasing the surface hardness is determined. This mechanism is the cleaning of the surface of samples from impurities of phosphorus and sulfur using a high-current electron beam.
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