Open Access Conference Proceedings

Abstract: This article introduces a mathematical model describing how certain parameter changes influence the quality level of final products manufactured out of X2CrNi18-9 steel type 1.4307. Among the examined parameters are: batches of faulty steel sheets, processing not meeting desired standards, erroneously planned processing methods etc. [..] Read more

Abstract: Production process of metallurgical enterprises is characterized by high costs and complexity manufacturing. Through the implementation of lean manufacturing principles can be reduced manufacturing costs and complexity of the manufacturing process. [..] Read more

Abstract: The steel sector is one of the most important sectors of the processing industry in Poland. The article presents the changes in the development of the steel industry in Poland in the years 2010-2014. [..] Read more

Abstract: Theoretical approaches of hot plastic deformations by rolling with the aim of structure formation are discussed. The influence of reheating conditions as are reheating temperature and holding time on reheating temperature on diameter of grain size is presented. [..] Read more

Abstract: The high silicon cast iron is a very attractive material because of its corrosion and abrasion resistance and also the ability to work at high temperature. The additional advantage of this material is the low production cost. [..] Read more

Abstract: Hydrogen may cause severe degradation on some high strength alloys, and although research efforts have intensified in recent years, our understanding of such phenomena still has room for improvement. For the metallurgical industry it would be useful to have applicable criteria able to predict the risk of hydrogen embrittlement and therefore be able to prevent embritlement damage to industrial products. [..] Read more

Abstract: Traditionally, scrap has been the raw materials feed to the electric arc furnace, but increasingly direct reduced iron (DRI), pre reduced pellets and hot briquetted iron (HBI) are being focused as potential alternative charge materials for the electric arc furnace. The partial substitution of scrap by these charge materials directly affecting on the quality of steel and process consumptions in electric arc furnace. [..] Read more

Abstract: Many metallurgical processes in some moment needs that the specific material in form of chunks, grains, powder, dust etc. must be added. [..] Read more

Abstract: The main problem in production of forgings from tool steels, especially in the form of thick plates, blocks, and rods which are used for special machine components for demanding applications, is the inhomogeneous structure with segregations, cracks in segregations or complex type of non-metallic inclusions of MnS and TiCN type. These forgings are actually produced from conventional forging ingots. [..] Read more

Abstract: The paper presents the use of a solidification model coupled with control algorithms for optimization of secondary cooling. The solidification model provides data to control algorithms, which evaluate an actual thermal state of a strand and control casting parameters such as cooling intensity in secondary cooling zone. [..] Read more

Abstract: This work studies the influence of precipitation on branched crack formation in the surface skin of continuously-cast slabs of Ti-Nb HSLA steel. Two slabs were analysed, cast at pulling rates of 0.43 m.min-1 and 1.03 m.min-1. [..] Read more

Abstract: Cooling by water sprays is widely used in heat treatment and other metallurgical processes to control the process temperature. Water spray cooling is used statically (without movement of the spray nozzles relative to the cooled object) or dynamically (with the movement). [..] Read more

Abstract: The paper deals with the study of thermo-physical properties of selected real steel grade. The work is focused mainly on phase transition temperatures and heat capacities, particularly liquidus and solidus temperatures, eutectoid transition, alfa-gamma and magnetic transition. [..] Read more

Abstract: Slag from iron and steel metallurgy can be divided into the blast furnace slag and ladle slag (ladle slag are divided into furnace slag and ladle slag). Slag is a by product of the metallurgical industry and it is the subject of several research. [..] Read more

Abstract: In the presented work, new thermodynamic approach based on basic thermodynamics was used for calculation of the surface tension of steel. Surface tension was calculated for three steel grades and calculated values were compared with experimental values at 1550 °C. [..] Read more

Abstract: The article describes an approach to decreasing the rejection rate of the steel plates due to the surface defects in the rolling mill achieved by optimization of air-water secondary cooling on the continuous casting machine (CCM) of steel. In context with the occurrence of the surface cracks on the steel plates a complex analysis of possible reasons causing the creation of monitored cracks was made. [..] Read more

Abstract: A three-dimensional mathematical model has been developed in order to describe the electromagnetic phenomena in an Electric submerged Arc Furnace (EAF). From the electromagnetics differential equations solution, the current density, Lorentz force and Joule heating was investigated in connection with the slag’s electrical conductivity values. [..] Read more

Abstract: Classification of the phase transformation models with respect to computing times and predictive capabilities was the objective of the paper. Selection of the best model for a particular application was discussed and three models were chosen for the analysis. [..] Read more

Abstract: In this work is described the effect of pre-heat-treatment on the microstructure and mechanical properties of different grades of steel before equal-channel angular pressing. Nomograms with mechanical properties of different grades of steel till and after annealing were obtained. [..] Read more

Abstract: The effect of preliminary heat treatment and equal channel angular pressing in step die on the microstructure and properties of steel grade 45 are analyzed. There is revealed that the grain size after equal channel angular pressing depends little on the preliminary heat treatment, however, annealing reduces the hardness of steel, which helps to reduce the effort of pressing on the first passes. [..] Read more