Influence Factors on the Formation of Mechanical Properties and Structure of Steel for Manufacture of Railway Axes

Abstract

The article investigated the features of the destruction and deformation of metal plates made of 30CrNi2Mo steel after ballistic tests. The peculiarity of the experiment was that during the test, the plates was additionally subjected to vibration at frequencies of 10 and 20 Hz. The perspective of the impact of vibration on the ballistic stability of plates has been revealed. After the experiment, through-holes of fragmentation and petal types with subsequent cracking were found in the static plates. Cracking propagates deep into the undeformed plate. The application of vibration showed a significant improvement in ballistic properties. When applying the combined test, a change in the resistance of the target was detected. Namely, the plastic component of the metal around the hole was increased and bullet fragments were found that remained on the surface of the plate after the test. It is shown that the further application of vibration is a promising direction for increasing the ballistic resistance of materials.