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Experimental INVESTIGATION OF influence WEDM PARAMETERS ON SURFACE ROUGHNESS AND FLATNESS DEVIATION 电火花加工参数对表面粗糙度和平面度偏差影响的实验研究
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3567
Dorota Oniszczuk-Świercz, R. Świercz, T. Chmielewski, T. Sałaciński
{"title":"Experimental INVESTIGATION OF influence WEDM PARAMETERS ON SURFACE ROUGHNESS AND FLATNESS DEVIATION","authors":"Dorota Oniszczuk-Świercz, R. Świercz, T. Chmielewski, T. Sałaciński","doi":"10.37904/metal.2020.3567","DOIUrl":"https://doi.org/10.37904/metal.2020.3567","url":null,"abstract":"Wire electrical discharge machining (EDM) is a modern technology that is widely used in the production of difficult to cut conductive materials. Stochastic nature of electrical discharges causing to difficult to identify the influence WEDM parameters on surface roughness and dimensional accuracy of machining parts. Predicting favorable machining conditions for the required surface finish and dimensional accuracy plays a key role in the process. Response surface methodology (RSM) was used to build empirical models on the influence of the discharge voltage VB , pulse interval SB , and workpiece height on the surface roughness ( Ra ) and the flatness deviation during the machining of tool steel X153CrMoV12. The conducted analysis of the material removal physics in relation to investigated parameters indicated potential sources of shape errors of cutting parts.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84136725","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}
引用次数: 14
EXPERIMENTAL VERIFICATION OF MECHANICAL PROPERTIES OF THUNGSTEN HEAVY ALLOYS AFTER HOT ROTARY SWAGING AND ANNEALING 热旋锻退火后重合金力学性能的实验验证
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3483
Ludmila Krátká
{"title":"EXPERIMENTAL VERIFICATION OF MECHANICAL PROPERTIES OF THUNGSTEN HEAVY ALLOYS AFTER HOT ROTARY SWAGING AND ANNEALING","authors":"Ludmila Krátká","doi":"10.37904/metal.2020.3483","DOIUrl":"https://doi.org/10.37904/metal.2020.3483","url":null,"abstract":"This study deals with the experimental processing of a tungsten heavy alloy prepared by powder metallurgy using the technology of rotary swaging. Rotary swaging took place at a temperature of 900 ° C. After processing by rotary swaging, the material was further subjected to annealing. Emphasis was placed on the mechanical properties of the material before processing, after processing and after annealing. In the study we also deal with the influence of forming and annealing on the structural arrangement of tungsten heavy alloy.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91335567","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}
引用次数: 0
Microstructure investigation and mechanical properties of Ti-6Al-2Sn-4Zr-6Mo alloy processed by hot rolling and solution treatment 热轧固溶处理Ti-6Al-2Sn-4Zr-6Mo合金组织与力学性能研究
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3580
M. H. Alluaibi, Saleh Sabah Alturaihi, D. Raducanu, Adrian Rusea, I. Cincă, A. Nocivin, V. Cojocaru
{"title":"Microstructure investigation and mechanical properties of Ti-6Al-2Sn-4Zr-6Mo alloy processed by hot rolling and solution treatment","authors":"M. H. Alluaibi, Saleh Sabah Alturaihi, D. Raducanu, Adrian Rusea, I. Cincă, A. Nocivin, V. Cojocaru","doi":"10.37904/metal.2020.3580","DOIUrl":"https://doi.org/10.37904/metal.2020.3580","url":null,"abstract":"The Ti-6Al-2Sn-4Zr-6Mo (Ti-6246) titanium alloy is categorized as one of α + β titanium alloys group, which plays an important role in the aerospace applications. This study aims to find out the optimal thermomechanical processing route to obtain a good balance of strength, ductility and fracture toughness. The Ti-6246 alloy was hot-deformed at a temperature of 900°C, with a total deformation degree of approximately 60%, and heattreated by a solution treating at temperatures between 800°C 1000°C for 18 minutes. The microstructural evolution, mechanical properties and fractography analysis were investigated. Results revealed that the volume fraction of the primary α (αp) phase decreases progressively until it is completely dissolved with increasing solution temperature; the secondary α (αs) phase increases whereas its width decrease with increasing solution temperature, and also the yield stress and ultimate tensile strength decrease with increasing solution temperature. A good balance of ultimate tensile strength and ductility was obtained in the case of a solution temperature of 900°C, which showed a tensile strength close to 812±4 MPa and an elongation close to 11.1±2.4 %. The fine αs phase facilitates the paths of crack propagation, meaning decrease the crack propagation resistance and decrease the ductility and fracture toughness.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75096957","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}
引用次数: 0
EXPERIMENTAL AND THEORETICAL DETERMINATION OF SPECIFIC HEATS, PHASE TRANSFORMATIONS TEMPERATURES AND ENTHALPY OF Fe-C-Cr-Ni ALLOWS 实验和理论确定比热，相变温度和焓的铁- c - cr - ni允许
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3530
S. Sorokina, B. Smetana, Ľ. Drozdová, M. Kawuloková, S. Zlá
{"title":"EXPERIMENTAL AND THEORETICAL DETERMINATION OF SPECIFIC HEATS, PHASE TRANSFORMATIONS TEMPERATURES AND ENTHALPY OF Fe-C-Cr-Ni ALLOWS","authors":"S. Sorokina, B. Smetana, Ľ. Drozdová, M. Kawuloková, S. Zlá","doi":"10.37904/metal.2020.3530","DOIUrl":"https://doi.org/10.37904/metal.2020.3530","url":null,"abstract":"Knowledge of thermodynamical and thermophysical properties of materials plays an important role for many industrial applications. The paper is dedicated to the study of three model alloys based on Fe-C-Cr-Ni. The studied alloys contained carbon in a range of 0.33 – 0.36 wt%, chromium 1.08 – 4.70 wt% and nickel 1.04 – 4.96 wt%. Thermophysical and thermodynamical properties depending on the composition of alloys such as specific heats, phase transformations temperatures and enthalpy were studied in low and high temperature areas. Experimental data were obtained using following devices: Setaram Sensys Evo and Setaram MHTC Line 96 with 3D DSC sensors. Specific heats were obtained using the continuous method. All measurements were performed in a helium atmosphere. The same properties were calculated using SW Thermo-Calc, then were compared and discussed with experimental data.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74157303","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}
引用次数: 0
selected properties OF hybrid PTA-MAG welded joints of thermomechanically rolled s700MC steel s700MC钢热轧PTA-MAG复合焊接接头的选择性能
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3506
Beata Skowrońska, T. Chmielewski, T. Sałaciński, J. Szulc, R. Świercz
{"title":"selected properties OF hybrid PTA-MAG welded joints of thermomechanically rolled s700MC steel","authors":"Beata Skowrońska, T. Chmielewski, T. Sałaciński, J. Szulc, R. Świercz","doi":"10.37904/metal.2020.3506","DOIUrl":"https://doi.org/10.37904/metal.2020.3506","url":null,"abstract":"The aim of this paper is to describe the selected mechanical properties and microstructure of butt welded joints obtained by the hybrid Plasma+MAG method of S700 MC steel (high strength Re=700 MPa). The results of metallographic research of welded joints, microstructure of the weld and heat affected zone, hardness distribution and impact toughness are presented. The tensile test shown that strength of welded joints was slightly reduced and the bending test revealed no crack formation in the weld. The impact toughness of measured welded samples with V-notch in HAZ (heat affected zone) reached high values that are higher comparing to samples with notch placed in the weld area. The investigation results show that the use of hybrid plasma + MAG welding arc does not significantly change the structure and deteriorate properties of welded S700MC thermomechanically treated high strength steel. the of The on samples both from the and root The show no failure up to the loading force, plastic properties of the joint. The Charpy impact test was performed the of according to PN-EN on welded samples with v-notch located in the weld HAZ. The VEB Werkstoffprüfmachinen toughness","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76327910","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}
引用次数: 1
The Impact of Carbon Neutrality on Human Resources in the Metallurgy Industry 碳中和对冶金行业人力资源的影响
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3640
Dominika Hrubá, Andrea Samolejová
{"title":"The Impact of Carbon Neutrality on Human Resources in the Metallurgy Industry","authors":"Dominika Hrubá, Andrea Samolejová","doi":"10.37904/metal.2020.3640","DOIUrl":"https://doi.org/10.37904/metal.2020.3640","url":null,"abstract":"The greatest challenge for the metallurgy industry today is to adapt to the EU’s stricter climate policy. The European Commission’s aim to achieve neutral CO2 emissions by 2050 will have a huge impact on the sector. The methods of achieving this aim will determine the fate of steel production in Europe. If European policy further weakens the competitive position of European smelters by giving preference to producers in China, Russia or the USA, the vast majority of production will move from Europe to third world countries. Steel companies in the Czech Republic are still attempting to limit the impact of their activities on the environment. Billions of crowns invested into reducing emissions from operations in the Moravian-Silesian Region led to a significant decrease in harmful emissions into the air. Although the industry is still a major source of pollution, its proportion of dust emissions, for example, has declined. The objective of carbon neutrality by 2050 will have a major impact on employment and the prosperity of industrial regions. The transformation to carbon-free industry entails the need for higher skills and sometimes even complete retraining of employees. The article analyzes the present impact of carbon footprint reduction on employment in the industry. The authors also predict further development in relation to human resources. The work takes into account external influences such as competition, the labor market and labor productivity.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74160049","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}
引用次数: 0
STUDY OF THE EFFICIENCY OF ELECTROFLOTATION PROCESS ON A MIXTURE OF HEAVY HYDROXIDES AND NONFERROUS METALS IN VARIOUS ELECTROLYTES 不同电解液中重氢氧化物与有色金属混合物的电浮选效率研究
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3600
T. A. Hein, P. Aung, Z. H. Than, A. Kolesnikov
{"title":"STUDY OF THE EFFICIENCY OF ELECTROFLOTATION PROCESS ON A MIXTURE OF HEAVY HYDROXIDES AND NONFERROUS METALS IN VARIOUS ELECTROLYTES","authors":"T. A. Hein, P. Aung, Z. H. Than, A. Kolesnikov","doi":"10.37904/metal.2020.3600","DOIUrl":"https://doi.org/10.37904/metal.2020.3600","url":null,"abstract":"The features of electroflotation extraction of a mixture of heavy hydroxides and non-ferrous metals (Fe 2+ , Ni 2+ , Zn 2+ , Co 2+ , Cu 2+ ) from a five-component system in the presence of various background electrolytes were studied. The influence of the nature of various background electrolytes on the kinetics of electroflotation extraction of the mixture of the studied hydroxides at pH=10 was established. It is shown that the addition of NaCl electrolyte can increase the efficiency and stabilize the electroflotation process of extraction of hard-to-dissolve heavy and non-ferrous metal compounds as part of multi-component systems from the wastewater of various electroplating plants, the recovery rate can reach to 99%. The conducted research shows the principal possibility and high efficiency of the process of electroflotation extraction of a mixture of insoluble compounds of copper, zinc and cobalt in the form of hydroxides. after electroflotation recovery","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79623172","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}
引用次数: 0
Effect of aditive production on aisi 316l material properties 添加剂生产对aisi 316l材料性能的影响
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3499
Šárka Hermanová, P. Čížek, G. Rožnovská, J. Kosňovská
{"title":"Effect of aditive production on aisi 316l material properties","authors":"Šárka Hermanová, P. Čížek, G. Rožnovská, J. Kosňovská","doi":"10.37904/metal.2020.3499","DOIUrl":"https://doi.org/10.37904/metal.2020.3499","url":null,"abstract":"This work is focused on the study of influence of additives manufacturing on material properties of AISI 316L steel. Comparison of the material properties of the plate produced by the selective laser melting (SLM) technology and the hot-rolled plate was performed not only on the results of tensile tests, but also on small punch tests, which is an evolving and promising testing method and will be implemented into standardized testing methods within EU soon. The determination of the yield point and the tensile strength from the results of small punch tests is based on the simple correlation among them. For wrought steels this correlation was verified but no such a relation is known for additive steels. Therefore, we tried to use this correlation to additive manufactured material and to compare the obtained results with the results of conventional tensile tests. The results of mechanical testing are complemented by microstructural investigation of both technologies, including fractographic analysis of fracture surfaces.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73781460","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}
引用次数: 0
PROTECTION OF LEAD STORED IN MUSEUM STORAGE CABINETS AGAINST CORROSION BY MEANS OF VAPOUR PHASE CORROSION INHIBITORS 用气相缓蚀剂保护博物馆储存柜中的铅免受腐蚀
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3576
K. C. Strachotová, M. Kouřil
{"title":"PROTECTION OF LEAD STORED IN MUSEUM STORAGE CABINETS AGAINST CORROSION BY MEANS OF VAPOUR PHASE CORROSION INHIBITORS","authors":"K. C. Strachotová, M. Kouřil","doi":"10.37904/metal.2020.3576","DOIUrl":"https://doi.org/10.37904/metal.2020.3576","url":null,"abstract":"High sensitivity of lead to organic compounds leads to degradation of lead artifacts stored in the museums or archives together with organic materials (wood, glue, leather, paper, plastic, etc.). Protection of the lead stored under adverse conditions (environment polluted by organic compound, mainly acetic acid) is based on the use of corrosion inhibitors. The aim of this work was to test compounds with high tendency to sublime under atmospheric conditions and good ability to form a protective polymeric layer on the lead surface. The effect of volatile corrosion inhibitors mentioned in the literature (benzotriazole, cyclohexylamine carbonate, dicyclohexylamine nitrite, urotropine and sodium benzoate) was tested directly by weight loss measurement and by the resistometric method in humid atmosphere with various acetic acid vapour concentrations. The damage of lead was characterized by X-ray diffraction analysis and scanning electron microscopy. The greatest inhibition efficiency in all corrosive atmospheres and for non-treated and corroded lead samples was achieved by cyclohexylamine carbonate.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81219549","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}
引用次数: 0
Laser cladding of TIN based coatings for industrial bearings application 工业轴承用TIN基涂层的激光熔覆
METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3573
M. Vostřák, Š. Houdková, J. Duliškovič, M. Hruška, Jiří Halml
{"title":"Laser cladding of TIN based coatings for industrial bearings application","authors":"M. Vostřák, Š. Houdková, J. Duliškovič, M. Hruška, Jiří Halml","doi":"10.37904/metal.2020.3573","DOIUrl":"https://doi.org/10.37904/metal.2020.3573","url":null,"abstract":"The quality and friction properties of sliding surfaces in industrial bearing are fundamental to their performance. Tin-based coatings applied by centrifugal and static casting are commonly used for bearing lining. Due to limitations of this technology, alternatives for applying the tin-based lining are sought. This study focuses on one possible alternative to applying tin-based coatings – laser cladding. The influence of laser cladding processing parameters on the properties and applicability of tin-based coating is analyzed. The goal of the process optimization is to achieve high productivity with the well-bonded coating without defects. The microstructural of cladded coating as well as the adhesion properties and presented and discussed. The processing parameters which lead to coatings fulfilling manufacturer requirements are selected.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84939977","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}
引用次数: 0
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