Comparative Analysis of Two Steel Grades 41cr4 and P355nl1 for Winter Operating Conditions

Abstract

One of the main criteria for the quality of steels is the ability to resist brittle fracture. This ability is qualitatively expressed in the value of impact strength and toughness. According to the statistical data at AS "Pasažieru vilciens", at low temperatures, the number of failures of the M-24 bolts for fastening the rubber-cord coupling increases. In this regard, the urgent task is to reduce the number of failures during the winter. The article presents the results of tests of impact strength and toughness, as well as a metallographic analysis of two steel grades 41Cr4 and P355NL1. Also an experiment was carried out, on the basis of which the main conclusions were made on the mechanical properties of two grades of steel 41Cr4 and P355NL1.