Open Access Conference Proceedings

Abstract: 5 types of steel, which were differently alloyed with chromium, molybdenum and nickel, were examined. Determination of the temperatures martensite start temperature (Ms) and martensite finish (Mf) was performed by dilatometer with the use of the plastometer GLEEBLE 3800 and relevant CCT evaluation software. [..] Read more

Abstract: The automotive industry is characterized by rapid development, which is the largest effort devoted to maximum production optimization. The article deals with problematics of hemmed joints in the automotive industry when main objective is to reduce production price while maintaining sufficient quality products. [..] Read more

Abstract: To determine the value of springback coefficient of sheet metal the cylindrical bending tests were conducted. The experimental tests of bending process were carried out using special device which allows to measure the value of sheet springback. [..] Read more

Abstract: In this article, the results of modifications of the forming process of the bearing housing of a turbine engine are presented. The bearing housing is one of the critical structural elements of a turbine engine and is made of AMS 5504 stainless steel. [..] Read more

Abstract: Deformation characteristics of the materials used in the engineering industry are mostly determined at the common stress-temperature conditions (mostly loading rate 10 mm∙min-1 and temperature 20 °C). However in the operating life are materials loaded under conditions which are quite different from these standard conditions. [..] Read more

Abstract: The paper presents experimental results that concern hydromechanical bulging of copper axisymmetric components whose relative wall thickness was s0/D= 0.045. The specimens used in investigations were segments of copper tubes having the outer diameter D= 22 mm and wall thickness s0 = 1 mm. [..] Read more

Abstract: The article presents use of stereoscopic techniques for visualization of simulation results from heating/deformation process of steel with a semi-solid zone. The numerical model describes phases of material, solid, semi-solid and liquid. [..] Read more

Abstract: The paper deals with analysis of the ultra-high strength steel at material tests under the high strain rates. In the experimental part was tested steel alloyed by manganese and boron with the predominant martensitic structure. [..] Read more

Abstract: In this work the theoretical-experimental analysis of the effect of the drawing speed on force parameters in multipass drawing process of high carbon steel wires has been assessed. Theoretical analysis of the heating of the wire in the high speed multistage drawing process was carried out on software Drawing 2D, in which the longitudinal stresses, drawing forces and drawing stresses has been estimated. [..] Read more

Abstract: The paper presents the results of numerical and physical modelling of the development of microstructure during the process of hot rolling of 20 mm diameter plain round bars. The tests described in the paper were carried out for the technological conditions of a sample bar rolling mill. [..] Read more

Abstract: The paper presents the results of research on the selection of tool materials, lubricants and self-lubricating coatings in the process of rotary forming of nickel superalloy Inconel type sheets. The abrasiveness tests of sheets were carried out with roller made of ceramics FRIALIT® F99.7 and steel CALDIE®. [..] Read more

Abstract: The paper present the concept of a mathematical model for predicting changes in the austenite microstructure of high-carbon steel. Based of physical modeling changes of microstructure the mathematical model for predicting changes in the austenite microstructure was built. [..] Read more

Abstract: The main goal of our paper is to compare the results obtained using full factorial experiments with different combinations of one factor levels. On the example of multipass wire drawing, we will show how the choice of levels of factors can affect the final result of the experiment, especially in view of the determination of the significant factors and their interactions. [..] Read more

Abstract: This paper deals with using the design of experiments (DOE) during the evaluation of mechanical properties of the wire for steel ropes. It was provided with a full factorial experiment with three factors at two levels. [..] Read more

Abstract: The metal forming technology is (mainly due to the automotive industry) one of the most dynamically developing branch of the engineering industry. Continuous effort to achieve the top technological level and car´s safety factor at keeping the low price level means necessity to still implement into own production process also the newest mathematical models of these technological processes. [..] Read more

Abstract: Many alloys that have lamellar structures, e.g., pearlitic steel, are widely used in practice. For the evaluation of the quality of steel wires for tyre cords, springs and ropes are studied extensively at our laboratory of wire drawing. [..] Read more

Abstract: In steel research, as well as in the manufacture of semi-finished metallurgical products and finished formed products, such as forged parts, the material is often heated to high temperatures which leads to surface oxidation and decarburization. Material-technological modelling involves the use of small-size specimens which are treated according to schedules identical to those in real-world processing. [..] Read more

Abstract: The work concerns an idea of the expert system for predicting the life of forging tools used in die forging processes, for which the knowledge representation and processing were based on Adaptive Neuro-Fuzzy Inference System (ANFIS). Using the results of extensive investigations and analysis, a knowledge base was developed for the three representative industrial hot forging processes (forging of front wheel, casing of constant velocity joint body, and fastener construction). [..] Read more

Abstract: The article presents the tests results which tested the possibilities of shaping magnesium alloys. Testing materials were ingots from magnesium alloys with symbols LAE442 (Mg-Li 4%) and WE43. [..] Read more

Abstract: The paper presents plasticity tests results for steel types 23MnB4, 30MnB4, C45 and C70 meant for rolling wire rods in modern continuous rolling mill. The assessment of plasticity was conducted in hot torsion test with the use of torsion plastometer in temperature range of wire rod rolling from 850 to 1150°C and strain rates of 0.1; 1 and 10 s-1. [..] Read more