Open Access Conference Proceedings

Abstract: The main purpose of this work is to meet the need of an electrical cable manufacturer on the breaking of the wire aluminum AGS alloy. And also answer the question of the misfit properties prescribed by the provider to the final properties of the wire drawn.In this study we tried to follow the evolution of the properties of wire alloy during drawing. [..] Read more

Abstract: Hydraulic descaling plays an important role in the surface quality of hot-rolled steel. Descaling occurs immediately before hot-rolling in order to eliminate layers of iron oxides on the surface. [..] Read more

Abstract: The production of seamless steel multi-rifled tubes (i.e. tubes with multiple inner grooving) by means of cold drawing ranks among the most advanced cold forming production technologies. [..] Read more

Abstract: The prediction of a fracture in forming processes was analyzed strongly in recent years. A number of material tests for determining a fracture criterion were carried out. [..] Read more

Abstract: The article presents the use of multiscale model to estimate the shape and size of the mixed and liquid zone in the modelling processes with semi-solid core. On a macro level to calculate the heat flow is used three-dimensional thermal model based on the Finite Element Method. [..] Read more

Abstract: The main disadvantage of using classical (butt) oval roll groove in the oval-round roll pass schedule is the relatively small coefficient of elongation. This fact requires a larger number of passes to achieve the final dimension of the bar (or wire). [..] Read more

Abstract: Surface defects on metals products often have their root cause created during the hot rolling process by oxide scale in cavities and indents becoming embedded from the plastic deformation. The size and aspect ratio of these initial surface features are critical parameters determining whether they will be eliminated or not by the rolling process. [..] Read more

Abstract: For the newly proposed pneumohydraulic drive of workpiece return movement it is researched relations, analysis was carried out and recommendations of selecting values of the initial pressure in the pneumatic chamber, ensuring a rational ratio between the periods of acceleration and deceleration were obtained. The mathematical model and program were created for calculation of the law of motion of the brake rod with floating piston device using the system variable throttling the flow of the working fluid along the movement in the brake chamber. [..] Read more

Abstract: The present work deals with the possibility of the evaluation of the descaling rate of the AISI 304 stainless steel. The samples were pre-treated in the reduction melt containing NaOH, Na2O and NaH and the final pickling took place in the mixtures of acids. [..] Read more

Abstract: Austenitization temperature of these steels can be used as a control measure of the transformation characteristics. Paper analyses the cavitation behaviour of a steel subjected to solution treatment at a lower temperature (950 °C), after which a primary aging at 700 °C and a tempering at 450 °C, were applied. [..] Read more

Abstract: This paper aimed to investigate the advantages of the use of S700MC steel instead of St52 steel widely used in industrial areas. For this purpose, a tensile test, a macro hardness test, a Charpy impact test, and a fatigue life test were performed on St52 steel and S700MC steel specimens. [..] Read more

Abstract: High-pressure steel cylinders (HPSC) are commonly used for a variety of applications like industrial gases storage and its transport, storage and transport of compressed natural gas (CNG) and many others. Especially in case of CNG storage, variety of gas purities is used worldwide. [..] Read more

Abstract: When dealing with corroded objects, it is necessary to identify the corrosion products to develop a proper treatment for this particular object. Using X-ray diffraction is still suitable to do the phase composition analysis of the material; however it does the analysis of the material in bulk. [..] Read more

Abstract: Creep resistance of steels in the field of dislocation creep strongly depends on both thermodynamic and dimensional stability of minor phases. Precipitation of many minor phases in heat resistant steels is now very well documented. [..] Read more

Abstract: This paper deals with the analysis of microstructure and mechanical properties of 9 Cr steel after austenitizing at temperatures of 1150 °C, 1180 °C and 1210 °C/2 hrs and after tempering at temperature of 790 °C/1 hr. Microstructure after austenitizing and quenching was formed of lath martensite and uniformly distributed ferritic area. [..] Read more

Abstract: A physical model describing the diffusion of interstitial atoms was developed and has been repeatedly used to study the redistribution of hydrogen, as well as predicting the risk of hydrogen damage during various real manufacturing processes.A particular advantage of this model is that, contrary to some simplified commercial and academic models, it contemplates diffusion in its most comprehensive description, i.e., with the driving force for atom diffusion being the gradient in chemical activation (and not simply occurring down a composition gradient). As the model also incorporates thermal history, microstructure, matrix solubility, multiple trapping distributions, interaction with the atmosphere and others, that is especially suitable to study of real manufacturing processes.In this case, two applications of interest both to academia and industry are presented. [..] Read more

Abstract: A new surface induction hardening technology was for the first time in Europe designed in Bonatrans Group a.s. Company for the purpose of increasing the safety and resistance of railway axles to fatigue damage. [..] Read more

Abstract: To evaluate the resistance to failure of the constructions with cracks usually the fracture criterions are used. One of such criterion used to evaluate failure is J-integral. [..] Read more

Abstract: It is well known, that lamellar pearlite austenitization can lead to rapid spheroidisation of cementite. This phenomenon is the base for ASR process – Accelerated carbide Spheroidisation and Refinement. [..] Read more

Abstract: The effect of mean stress on fatigue life and fatigue limit was investigated for S355 NL+N ferritic-pearlitic steel. Changing stress ratio from R=0 corresponding to pulsating regime to R = -1, which is in conformity with alternating regime, the fatigue life was changed when applying the mean stress for the same stress amplitude. [..] Read more