Open Access Conference Proceedings

Abstract: The austenite amount in grain-oriented electrical steel during hot rolling is very impotent parameter. It influences on structure and texture of hot rolling bands and on distribution and size of precipitations. [..] Read more

Abstract: The paper presents numerical research of burnishing process of the steel tubes. Burnishing broaching process is a technology of surface plastic forming of machine parts. [..] Read more

Abstract: One of the main features of rolling process is the inhomogenity of strain in the cross section of slab. It is especially important to know strain distribution in case of massive slabs multipass rolling. [..] Read more

Abstract: In this paper an analysis of press forging process of complex shape forming from Ti-10V-2Fe-3Al alloy forged in 900oC temperature was introduced. It is a high-strenght titanium alloy. [..] Read more

Abstract: A theoretical and experimental analysis of a heat induction bending process for tubes used in the power industry was performed. First, the design of the heat induction bending process for tubes is described and the industrial application areas for this technology are presented. [..] Read more

Abstract: The article deals with the evaluation issue of deformation in the sharp radius of pressed parts. In theory deals with the stressed states and deformation of the molded body and then with the methods of their evaluation using deformation networks and numerical simulations. [..] Read more

Abstract: Test of wire by alternate bending to rupture is specific in that only a very small part of the sample is at this test exposed to plastic deformation. Thanks to this, the test result, it means the number of bends to rupture, depends strongly on the wire area, which was affected by bending. [..] Read more

Abstract: This paper describes usage of a microbending testing device to determine mechanical properties of austempered ductile and grey iron (ADI/AGI) and austempered vermicular-graphite iron (AVGI). Possibilities and benefits of microbending test compared to conventional testing methods are highlighted.. [..] Read more

Abstract: The development of fatigue cracks is often analyzed on the basis of their geometry and is explained merely by the state of tensions, without the consideration of the microstructure. The crack resistance is, however, strictly connected with the microstructure. [..] Read more

Abstract: Carbon diffusion was studied in temperature interval 573 - 1073 K in carbon-supersaturated surface layer of 9Cr–1Mo steel P91 and in model Fe-15Cr binary alloy. Extremely low carbon diffusion coefficient D (by 3 orders of magnitude lower than the value Deq in material with equilibrium carbon concentration) was observed in carburized surface region of Fe-15Cr. [..] Read more

Abstract: The work deals with fractal response study of root of the TH29 profile from carbon steel micro-alloyed with vanadium (0.12 %), niobium (0.04%) and nitrogen (0.012 %) designated for mine supports. The profile was evaluated both after hot rolling and after subsequent straightening that showed different impact energy values, even when the feature of fracture surfaces did not differ significantly. [..] Read more

Abstract: 34CrMo4 steel is commonly used material for high strength applications such as shafts, forgings and high pressure steel cylinders. Mentioned steel is used in variety of microalloying by niobium, titanium, vanadium and nitrogen, respectively of those elements combinations. [..] Read more

Abstract: Depth sensing indentation allows deriving mechanical properties from the indentation load-displacement data using a micromechanical model developed by Oliver & Pharr (O&P). However, O&P analysis on the indentation unloading curve is developed from a purely elastic contact mechanics (sink-in). [..] Read more

Abstract: The use of new materials including steel HSLA-High Strength Low Alloy by the automotive industry including manufacturers of semitrailers requires the use of efficient cutting techniques. Cutting sheets of different thickness is a big challenge for manufacturing companies. [..] Read more

Abstract: In the automotive industry about 60% of mass of the car continue to represent structural elements, formed of steel plates of increasing strength while maintaining good plastic characteristics and susceptibility to stamping. Constructors seek to reduce the mass of cars and semi-trailers and it is possible through the use of fine- grained and quench and tempered high strength steels. [..] Read more

Abstract: The aim of this work was to identify and evaluate eventual defects in tube welded joins made from X10CrNiCuNb18-9-3 material. By the use of non-destructive testing (namely capillary test and ultrasound test) were identified defect joins which were further screened using light optical microscopy.. [..] Read more

Abstract: A microstructure of 3-rd generation advanced high strength steel treated by Q&P (quenching and partitioning) process was obtained. Numerical simulation of hot rolling on continuous mill 2000 by means of HSMM software (Hot Strip Mill Model) was utilized. [..] Read more

Abstract: One of the available routes to developing a new material resistant to high-temperature creep is to create a microstructure consisting of a metal matrix and dispersed stable particles. For making intricately shaped components from such materials, new processes must be found to allow near net shape products to be manufactured in a simple and rapid manner. [..] Read more

Abstract: This paper focuses on the influence of the cold bending process on stress -strain characteristics of materials SUPER304H, HR3C, Tp347HFG that can be used for superheaters and reheaters of newly built or refurbished power plant boilers.The qualification tests were carried out on bends in two dimensions of tubes and on several bending radii to verify the effect of cold bending technology. In the year 2013 was tested new bend radius. [..] Read more

Abstract: The diffusional transformation of pearlite to austenite takes place when the iron alloy with a matrix containing pearlite is heated to a temperature above Ac1. Development of the transformation contains two stages. [..] Read more