The article presents the results of analysis evolution defective substructure rail steel pearlite with lamellar morphology under deformation by uniaxial compression. strain hardening studied such has a multistage character. Deformation is accompanied fragmentation grains, which intensifies as degree increases and reaches 0.4 foil volume at ε = 50 %. Fragments formed in ferrite plates are separa...

This paper describes the relations between microstructure, mechanical properties, and electromagnetic behavior of carbon steel wires submitted to different thermomechanical treatments. The electrical resistivity bulk magnetic properties are determined through measurements down 2 K hysteresis loop measurements. In addition, domains imaged by force microscopy despite complex microstructures. main...

The mechanical improvement and "self-protection" properties are mainly needed to develop weather-resistant steel materials. In this study, A588 was given thermomechanical treatment (hot-rolling) followed by a quench-tempering process. is modified adding 1, 2, 3 wt% nickel the primary alloy. Steel made using hot rolling process at 750 ℃ for 1 hour with 70% thickness reduction. sample heat-treate...

ASTM A53 steel is medium carbon with 0.3% content and often used for pipe manufacturing. The purpose of this study was to determine the effect post heating temperature variation on bending metallography test weld joint using GMAW process. electrode ER-70S-6. Post variations are 250oC, 300oC 350oC. result showed that welding 350oC postheating produce smallest open defect value. microstructure pe...

In this work the effects of controlled rolling parameters and adding of Niobium have been studied. In this order two steel grades with and without Niobium are planed and after steelmaking and continuous casting, rolling process are done. Then, laboratory investigations such as microstructure, mechanical properties and grain size analysis were performed Tensile and Charpy impact tests specimens ...

Modelling of technological processes of heat treatment or welding, involving multiple heat source transitions, requires considering the phenomenon of tempering. In work have been presented results of dilatometric research of hardened C45 steel subjected to tempering. The analysis of the infl uence of heating rate at the kinetic determined from dilatometric curves has been made. There have also ...