Open Access Conference Proceedings

This paper presents results of the examinations aimed at determination of the best controlled cooling conditions for wire rod with diameter 16.5 mm. The examinations were carried out for 20MnB4 steel grade for cold upsetting.The first stage of the research was analysis of currently used wire rod rolling and cooling technology, with particular focus on controlled cooling process based on Stelmor technology. The effect of rolling technology on microstructure and mechanical properties of wire rod was evaluated. The next stage of the research was to prepare TTT and DTTT diagrams for the steel grade studied. The purpose of this research stage was to determine cooling rate for microstructure formation in the steel grade analysed in the study.Based on the obtained diagrams and metallographic investigations, some modifications in wire rod controlled cooling process were proposed.

Keywords: 20MnB4 steel grade, wire rod for cold upsetting, controlled cooling, heat treatment, metallographic examinations

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.