METAL 2020 Conference Proeedings最新文献

{"title":"PRACTICAL EXPERIENCE WITH WELDING NEW GENERATION STEEL THOR®115 ASSIGNED FOR POWER INDUSTRY","authors":"K. Kwieciński, M. Urzynicok, A. Ferrara, Valentin V. Barsan","doi":"10.37904/metal.2020.3527","DOIUrl":"https://doi.org/10.37904/metal.2020.3527","url":null,"abstract":"Very popular and highly employed steel grades such as the 9 % Cr CSEF steels are limited in terms of service temperature mainly due to capping their steam oxidation resistance capabilities at temperature levels, required by the drive for efficiency increase. For heat-exchangers manufactured from conventional materials, the formation, growth and spallation of oxide scale on the steam side may eventually impair plant operations and damage other downstream components. To address the requirements of the energy market considering these new requirements, Tenaris developed the Tenaris High Oxidation Resistance (THOR®115) CSEF steel grade. Easy weldability is a key property of steel grades and is decisive whether or not a material is adopted by power plant manufacturers. This paper presents the welding experience of THOR®115 grade assigned to power industry. In contribution, results of non-destructive and destructive tests gained during first steps of welding homogenous welded joints are presented.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73589690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of cavities with application of free core solenoid","authors":"J. Moravec","doi":"10.37904/metal.2020.3464","DOIUrl":"https://doi.org/10.37904/metal.2020.3464","url":null,"abstract":"The paper deal with the unconventional method of creating cavities in samples. There is also described the principle of system for creating experimental samples. In other parts is work focus on free-core forming of cavities in lead samples. Based on the idea of the experimental device was this constructed and the research was carried out. An important part of the experimental device is the electrical circuit, where a magnetic field (impulse) is created, which forms the experimental samples. With free-core forming, lead samples of square shape with dimensions of 35x35 mm and thickness of 7 mm were formed. The results obtained in the experiments show that such a molding method is suitable for several reasons. The first is the speed of the process. In this case it is 0.03 s. The second advantage is in terms of ease of automation using this type of forming. Quite a simple solution with application of magnetic field ensures accurate, fast and high-quality cavity formation in metal materials. The results achieved confirm the suitability of the solution for application in the manufacturing process. Also, the reproducibility of the results is at a high level. Working with a free core is simple and reliable. The described solution complements and extends the sphere of forming","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84300369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial fiber orientation analysis","authors":"A. Gądek-Moszczak, Mariusz Tworzydło, Paulina Romańska","doi":"10.37904/metal.2020.3456","DOIUrl":"https://doi.org/10.37904/metal.2020.3456","url":null,"abstract":"Paper presents an analysis of 3D images of the composite with a polyamide (PA) matrix reinforced by short glass fibres. The aim of the study was the assessment of the orientation of the fibres. The algorithm used for analysis is based on describing ellipsoids on the detected objects for its orientation assessment. Three subsamples of 3D images were cropped from three different part of the original sample. Each subsample shows the visible difference in the fibre orientation. The detection of the fibres and the analysis of the direction were performed using open source software ImageJ . Analysis of obtained results shown that the ellipsoid method is sensitive to the differences in the fibre orientation and may deliver valuable information for structure description.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"11 12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80407173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INFLUENCE OF CERAMIC TOOL PROCESSING PARAMETERS ON THE STATE OF NC6 STEEL SURFACE","authors":"Aleksander Przesmycki, T. Sałaciński, M. Winiarski, T. Chmielewski, R. Świercz, Daniel Ciarciński","doi":"10.37904/metal.2020.3557","DOIUrl":"https://doi.org/10.37904/metal.2020.3557","url":null,"abstract":"The article presents the characteristics of ceramic tools designed to improve the condition of the surface layer of workpieces. After milling or turning, the surface layer of the workpiece often has several disadvantages, such as burrs or uneven roughness. Brushed ceramic tools allow the surface layer to be improved as another technological step in the entire manufacturing process. The presented tests of the geometrical surface structure were made for NC6 tool steel for cold work. An analysis of the impact of brushing technological parameters on the height of unevenness and visual features of the machined surface was carried out.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"40 11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83183530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CORROSIVE - MECHANICAL DAMAGE OF THE PRESSURE PARTS OF HEAT ENERGY EQUIPMENT","authors":"M. Hagarová, D. Jakubéczyová, G. Baranová","doi":"10.37904/metal.2020.3547","DOIUrl":"https://doi.org/10.37904/metal.2020.3547","url":null,"abstract":"Corrosion mechanical damage of the economizer pipe of the biomass boiler was analysed. Macroscopic, microscopic and SEM-EDX analysis were used for the analysis of steel samples. The results of the analyses showed a strong degradation effect of a high, up to 30% solids fraction in the flowing flue gas on the surface of the heat exchange tubes. The high amount of aggressive components, in particular Cl, S, Na, K and Zn, resulted in the formation of highly aggressive condensate on the tube surface when the operating temperature dropped below 200 ° C. The result was a more than 80% reduction in the wall thickness of the tube at the bottom of its arc, leading to perforation of the economizer tube wall. Spilled heated water released a protective corrosion layer from the surface and exposed the active steel surface. The solution of the unfavourable corrosion mechanical process is to ensure the required technological parameters (operating temperature and pressure of the flowing medium), chemical composition of the flue gas while ensuring sufficient operational capability and material life of the pressure parts of the heat equipment.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78873155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ECOTOXICITY AND CORROSION INHIBITION EFFECT OF QUINOLONIUM AND IMIDAZOLIUM SALTS","authors":"K. Marková, J. Pavlovský, Š. Langová, P. Pánek","doi":"10.37904/metal.2020.3535","DOIUrl":"https://doi.org/10.37904/metal.2020.3535","url":null,"abstract":"The corrosion inhibition of steel in the hydrochloric acid solution by N-butylquinolinium bromide and 1-octyl-3-methylimidazolium chloride was investigated using electrochemical and weight loss methods. Both compounds under investigation act as mixed type inhibitors with predominantly anodic action. The Gibbs energy of adsorption was calculated by means of the Langmuir isotherm. The inhibition efficiency of 1-octyl-3-methylimidazolium chloride was higher. Daphnia magna was used as acute toxicity test organism. 1-octyl-3-methylimidazolium chloride was more toxic than N-butylquinolinium bromide. The LC 50 value (48 hours) for 1-octyl-3-methylimidazolium chloride for acute test on Daphnia magna was 0.020 mg  l -1 and it was 1.271 mg  l -1 for N-butylquinolinium bromide. 1-octyl-3-methylimidazolium chloride can be classified as extremely toxic substance (LC 50 is 0.01-0.1 mg  l -1 ) and N-butylquinolinium bromide can be classified as moderate toxic substance (LC 50 is 1-10 mg","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82843077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Automatic selection of binarization method from images with serial numbers on industrial products","authors":"Vít Pasker, Ondřej Grycz, Robert Hlavica, Pavel Foretník, Ivana Barčáková","doi":"10.37904/metal.2020.3636","DOIUrl":"https://doi.org/10.37904/metal.2020.3636","url":null,"abstract":"The article deals with the automatic selection of the binarization method using advanced methods of artificial intelligence. The input images to the algorithms are images of serial numbers from industrial environments, for example on iron and steel billets, slabs, etc. The surface of these products is in most cases severely damaged by industrial processes, such as traces of cut, rust, noise, surface roughness, etc. Text recognition is a very common topic nowadays. All investigated solutions are based on the fact that each image is binarized by a single defined method and the accuracy of recognition is given only by the quality of learning of the neural network. Especially in an industrial environment, it is difficult to create a universal method for unambiguous methods for text recognition. The innovation described in this article is the automatic selection of the binarization method (from the Bradley, Niblack, Sauvola methods etc.), which increases the accuracy already in the phase before the text recognition itself, which with the subsequent correct combination of filters leads to an overall increase in accuracy.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90781812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"HYDROGEN EMBRITTLEMENT AND PECULIAR PRORERTIES OF DETERMINING THE CONCENTRATION OF HYDROGEN IN STRUCTURAL STEELS","authors":"J. Averina, D. Zhukov, Victoria Tsevkova, I. Safarova, E. Subcheva","doi":"10.37904/metal.2020.3494","DOIUrl":"https://doi.org/10.37904/metal.2020.3494","url":null,"abstract":"Alloys used for the manufacture of various structures must be strong and easy to process. Under certain conditions, hydrogen can adversely affect the fracture characteristics of most structural alloys. A classic example is hydrogen embrittlement of high-strength martensitic steel, which is the result of a high concentration of hydrogen in the metal. An extremely high internal concentration of hydrogen in such alloys can be created during chemical or electrochemical processing, such as etching, electroplating, and removing coatings used in the production of a particular product. Over time, this hydrogen forms bubbles and cracks on the internal surfaces of grain boundaries or inclusions and causes slow destruction. This type of embrittlement, caused by hydrogen located in the internal volumes of the alloy and developing during the stay of the alloy under external load, is called internal hydrogen embrittlement. This embrittlement is typical for a large number of alloys used in mechanical engineering. The article discusses the features of the origin of hydrogen and the form of its existence in structural alloys. The process of hydrogen embrittlement in alloyed structural steels is studied. The method of performing analysis on the \"G8 GALILEO\" hydrogen analyzer for structural alloys is adapted and described. The corresponding results of the work and recommendations are given.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86474203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INFLUENCE OF LASER PROCESSING ON THE MICROSTRUCTURE, MICROHARDNESS AND CORROSION RESISTANCE OF DIFFUSION BORONIZED LAYER PRODUCED ON 145Cr6 TOOL STEEl","authors":"A. Bartkowska, D. Bartkowski, P. Jurči, D. Przestacki","doi":"10.37904/metal.2020.3561","DOIUrl":"https://doi.org/10.37904/metal.2020.3561","url":null,"abstract":"The paper presents the results of laser processing of diffusion boronized layer on 145Cr6 tool steel. The aim of the study was to investigate the microstructure, phase composition analysis, microhardness as well as corrosion resistance of the newly-formed layer. Boronized layer was produced at 950 ° C by 6 h in mixture consisted of boron carbide B 4 C as a source of boron, kaolin as a filler and ammonium chloride as activator. Laser processing were conducted using 3 kW diode laser. As a result of influence the laser beam on the boronized layers the presence of three areas was observed: remelted zone, heat affected zone and substrate. The boronized layers after laser processing were characterized by high microhardness and good corrosion resistance. The zone enrich in boron was a 2-3 times thicker than diffusion boronized layer.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"1993 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89041795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Loading Rate on the Material Deformation Behaviour under Bi-axial Loading","authors":"P. Solfronk, J. Sobotka, David Koreček, David Mizera","doi":"10.37904/metal.2020.3478","DOIUrl":"https://doi.org/10.37904/metal.2020.3478","url":null,"abstract":"In recent years, great effort has been made in all branches of industries to put into practise new methods and procedures using numerical support for technological processes, digitization and robotization of the production operations. The complex of these measures is known as Industry 4.0, which aims to reduce production costs, while increasing the flexibility of companies. The concept of the so-called virtual factory makes possible to predict possible problems and problematic production points already in the design phase by means of the numerical modelling. A prerequisite for the proposed virtual concept functioning is necessity to master the individual partial solutions with the sufficient accuracy of the whole computation with the subsequent data sharing in case of their need in other stages of the virtual solution. With the development of the computer technology (both in hardware and software), there is obvious effort to use still more and more complex mathematical computation models that allow taking into account a higher number of input process parameters and thus to achieve a higher computation accuracy. The paper is focused on the issue of technological processes numerical modelling at thin sheets drawing. As a needed prerequisite for obtaining the result having required accuracy, there is the correct choice of proper deformation model and definition of boundary conditions, which take into account the monitored technological process. In order to define advanced mathematical models of thin steel sheets deformation behaviour, it is necessary to perform (beside standard tests as e.g. static tensile test) also tests under biaxial loading. One of the most common tests for determining mechanical properties under biaxial loading is the hydrostatic bulge test (HBT). In the experimental part, the paper evaluates the influence of loading rates on the resulting mechanical properties of tested material. The required strain rate is affected by the time change of pressure increase. There were used three loading rates with linear pressure increase and two loading rates with holding time to enable stress relaxation of tested material. The contact-less optical system Mercury RT was used for data acquisition and deformation analysis. For the selected test parameters, stress-strain curves were determined from the measured values. Based upon these stress-strain curves, there was subsequently evaluated influence of the strain rate on the deformation behaviour of tested material and stress relaxation during the tests. As a testing material was used deep-drawing material specified for drawing stampings in the automotive industry.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89093361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}