Protsessy lit''ia最新文献

{"title":"ADVANTAGES AND DISADVANTAGES OF METHODS FOR CALCULATING THE CHARGE FOR SMELTING SYNTHETIC IRON IN THE FOUNDRY","authors":"К. Sirenko, V. Mazur","doi":"10.15407/plit2023.03.049","DOIUrl":"https://doi.org/10.15407/plit2023.03.049","url":null,"abstract":"","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67138305","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 THE MASS RATIO OF THE REINFORCEMENT ELEMENT AND MATRIX ALLOY FOR FORMING HETEROGENEOUS CASTING","authors":"М.I. Tarasevich, O. Shinsky, I. Shalevska, I. Korniets","doi":"10.15407/plit2023.03.025","DOIUrl":"https://doi.org/10.15407/plit2023.03.025","url":null,"abstract":"","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67138240","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":"OBTAINING SHAPED FLUOROPHLOGOPITE PRODUCTS BY CHILL CASTING","authors":"A.H. Maliavin, O. Kuzmenko, V. Shcheretskyi","doi":"10.15407/plit2023.03.041","DOIUrl":"https://doi.org/10.15407/plit2023.03.041","url":null,"abstract":"","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67138262","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":"INCREASING OF DUCTILE CAST IRON PLASTICITY VIA IN-MOLD MODIFYING OF MELT WITH LOWERED SILICON CONTENT","authors":"V. Bublikov, O. Nesteruk","doi":"10.15407/plit2023.03.003","DOIUrl":"https://doi.org/10.15407/plit2023.03.003","url":null,"abstract":"","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67138117","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":"THE METHOD OF AVOIDING HEAT BRACKET OF PIPE BILLS MADE OF AMg6 ALLOY WHEN CASTING IN MOLDS BY OPTIMIZING THE TEMPERATURE PARAMETERS OF CASTING AND USING VIBRATION","authors":"V. Shkolyarenko, A. Nuradinov, C.V. Prygunov, I. Nuradinov","doi":"10.15407/plit2023.03.012","DOIUrl":"https://doi.org/10.15407/plit2023.03.012","url":null,"abstract":"","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67138171","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":"Modern ideas about the micronhomogeneous structure of metal melts (overview)","authors":"A. Verkhovliuk, O. Scheretsky","doi":"10.15407/plit2022.04.051","DOIUrl":"https://doi.org/10.15407/plit2022.04.051","url":null,"abstract":"The review examines the question of modern ideas about the structure of metal melts in a wide temperature-concentration interval. The existing theories and models of their micro-inhomogeneous structure, namely quasi-chemical, cluster, and colloid, are presented. The quasi-chemical theory takes into account the arrangement of atoms in a metallic liquid, i.e., it is believed that the probability of atoms of the 1st and 2nd grade in one of the two neighboring places is different. It is based on comparing the probabilities of different ways of filling neighboring places. A cluster is a microgrouping of atoms that preserve a certain close-range order in their mutual arrangement and which are united by a general oscillatory movement of the entire grouping and at the same time half connected at any moment with the entire mass of matter in a given volume. Elements of disorder in this model of metal melts are introduced by the movement of activated atoms, thermal fluctuations, and diffusion displacements of clusters, which are associated with the movement of clusters, periodic formations and closing of intercluster gaps, and relaxation displacements of atoms in the middle of clusters, which are associated with thermal fluctuations. The colloidal model was formulated to explain the micro-heterogeneity of eutectic systems. According to this theory, the microheterogeneity observed after melting the sample is due to the long-term existence of microregions in the melt, which are a legacy of the chemically inhomogeneous initial casting, which is enriched with various components. These regions are considered as dispersed particles and the melt is considered as a microheterogeneous system consisting of dispersed and dispersed phases. The microheterogeneous state of the melt was distinguished by the presence of an interfacial surface that separates the inclusion from the main melt. The work also presents results that confirm the fact that amorphous alloys are structurally microinhomogeneous. Since these systems are formed at cooling rates of the initial melt of about 106 0C/s, their micro-heterogeneity is associated with the structure of liquid metal solutions. Keywords: micro-heterogeneity, metal melt, models, amorphous alloys.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49321477","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":"MHD-processes and equipment for continuous casting of aluminum alloy ingots","authors":"A. Narivskiy, S. Polyvoda, M. Voron, O. Siryi","doi":"10.15407/plit2022.04.022","DOIUrl":"https://doi.org/10.15407/plit2022.04.022","url":null,"abstract":"The design and technological capabilities of the multifunctional MHD-complex for the preparation of aluminum alloys and their continuous casting ingots are presented. Technology of preparing Al-2.5 wt.% Zr master-alloy in the MHD installation and continuous casting of ingots from it has been developed. It is shown that the use of electromagnetic stirring of a solid-liquid phase inside ingot during continuous casting allows to disperse the structure in aluminum master-alloys with refractory elements. Master-alloy bar was made from Al-2.5 wt.% Zr alloy ingot for continuous modification during ingot casting. The technology of medicated ingots continuous casting from high-strength aluminum alloy B96Ц1 with its modification with master-alloy bar was developed, which allowed to reduce the grain size by 3.5 times and to increase the strength of pressed products by 6% and relative elongation by 35-40%, compared to products made from continuously casted ingots of this alloy and casted without modification with overviewed master-alloy. Keywords: MHD, high-strength aluminum alloys, modification, ingot.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43531750","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":"Bionic approach to the manufacture of cast lightweight metal structures for the construction of modular structures","authors":"O. Shinsky, P. Kaliuzhnyi, V. Doroshenko","doi":"10.15407/plit2022.04.063","DOIUrl":"https://doi.org/10.15407/plit2022.04.063","url":null,"abstract":"Prefab modular building metal structures have several advantages, especially for reuse, compared to building structures made of concrete and wood. Analysis of the structure of the cost of such metal structures and their installation proved that the most effective way to reduce their cost is to reduce metal consumption. Unlike welded for bolted structures, installation is simplified and bolted connections provide the possibility of disassembling the structure with transportation to another place, which is important for hangars, warehouses that change location. Casting of lightweight metal structures can help increase the potential for new and rapid construction. For this, the most suitable method is the Lost Foam Casting (LFC) process in vacuum molds made of loose sand. No other casting method can compete with LFC in the production of frame-bearing structures of complex geometry. Examples of the optimization of metal structures by imitating the structures of nature, in particular biological and DNA structures, as a bionic approach to the design of man-made metal products are considered. Framework and cellular spatial materials obtained by the LFC method expand the existing range of properties compared to compact materials. And the described cast materials based on analogues from the macro- and micro-world of nature and on prefab models will simplify the design and production of frame lightweight products, which are classified as \"materials of the future\". Ukraine receives metal from its own ores and is able to transform it into a high-tech, knowledge-intensive product in the form of machines, mechanisms and building structures. The technological direction of borrowing the structural properties of natural materials is studied not only for copying them, but also for obtaining new materials and structures with optimization for specific mechanisms or buildings, promoting the use of metal structures as an effective solution in the construction industry during the reconstruction of the country. Keywords: building metal structures, modular structures, modeling, structures of nature, castings","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47763178","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":"Technological features of obtaining alloys and master-alloys of TI-ZR-NB-SN system in the conditions of electron beam casting technology","authors":"M. Voron, S. Schwab, R. Selin","doi":"10.15407/plit2022.04.028","DOIUrl":"https://doi.org/10.15407/plit2022.04.028","url":null,"abstract":"Electron beam casting technology is a unique method for obtaining cast products and semi-finished products from a wide range of titanium alloys. This technology can be very promissing in production of biocompatible titanium alloys for endoprosthesis. A particularly difficult and important task in this context is preparation of Ti-Zr-Nb-Sn system alloys with high strength and low modulus of elasticity. As a result of experimental development of specified alloys melt preparation technological modes, possibility of obtaining complex titanium alloys with a high content of zirconium and niobium was shown. It is also determined, that when the niobium content in the charge is more than 30 % wt. there is a decrease in the concentration of titanium and zirconium in the melt due to their freezing on the walls of the skull. As a result, there is a change in the chemical composition of the melt, the amount of niobium in which can exceed 50 % wt. Maximum amount of tin that can be assimilated in titanium-based melts under EBCT conditions is 5 % wt., and niobium-based melts are twice less. It has been proven that obtaining melts of Ti-Zr-Nb-Sn system with a precise chemical composition, using the chosen method, is a difficult and still unsolved problem, but due to the possibility of melting alloys with a high content of niobium and zirconium in its conditions, this method is effective in the production of master alloys and ingots for the production of powders used as raw materials for additive tmanufacturing. Keywords: titanium alloys for endoprosthesis, foundry production, Ti-Zr-Nb-Sn, electron-beam casting technology.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44780265","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":"Technological features of the combined foundry-induction method of producing three-layer castings","authors":"A. Tymoshenko, V. Lihoshva, O. Shmatko, O. Pelikan, R. Likhatskyi","doi":"10.15407/plit2022.04.034","DOIUrl":"https://doi.org/10.15407/plit2022.04.034","url":null,"abstract":"The technological features of developed casting-induction method for obtaining threelayer «cast iron-steel-cast iron» castings were studied. The specified method consists in the use of induction heating of a steel billet with a high-frequency electromagnetic field in the casting process for obtaining three-layer products. The paper represents mathematical modeling results of temperature fields distribution under the action of electromagnetic fields on a steel workpiece. The main regularities of steel billet temperature changes depending from the current level and heating time have been established. As a result of simulation modeling, the technological parameters of the steel workpiece heating and cooling process were determined, as well as the pouring of the melt during the production of three-layer castings. Obtained dependences between temperature of the poured melt and temperature of the workpiece are necessary to ensure a high-quality connection between the steel inner part and working layer made of cast iron. The results of the experimental testing confirmed the adequacy of the mathematical modeling of the thermal state of the workpiece, as well as the effectiveness of using the developed combined casting-induction method for obtaining three-layer castings. Keywords: induction casting method, induction heating, simulation modeling, three-layer casting, electromagnetic field, melt.","PeriodicalId":52779,"journal":{"name":"Protsessy lit''ia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45279572","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}