Innovative Materials and Technologies in Metallurgy and Mechanical Engineering最新文献

{"title":"Research of the influence of gasoline-methanol fuel mixture composition on the technical and economic performance of 4-stroke internal combustion engine in partial loading mode","authors":"G. Slynko, R. Sukhonos, V. Okhrymenko, V. Slynko, V. Almaiev","doi":"10.15588/1607-6885-2021-3-06","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-06","url":null,"abstract":"Research of the influence of gasoline-methanol fuel mixture composition on the technical and economic performance of 4-stroke internal combustion engine in partial loading mode","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129075483","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 system alloying and dimensional mismatch of crystalline lattices of g- and g'- phases on the characteristics of the strength of single-crystal nickel superalloys","authors":"V. Olshanetskii, O. Glotka, V. Kononov","doi":"10.15588/1607-6885-2021-3-01","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-01","url":null,"abstract":"Purpose of the work. Obtaining predictive regression models, by means of which, it is possible to adequately calculate the mechanical properties of monocrystalline nickel-base superalloys without conducting previous experiments. \u0000Methods of research. For experimental and theoretical studies of temperature performance, a working sample of alloys is formed consisting of known industrialt nickel-base superalloys for monocrystalline castings of domestic and foreign production, which due to contents of the main elements, cover a wide range of alloying. The obtained values were processed in the Microsoft Office with the least squares method, with the obtaining of the \"parameter-property\" correlation dependencies with the obtaining of mathematical equations of regression models (trend lines) that describe these dependencies optimally. \u0000Received results. The influence of alloying elements on their tendency to the formation of phases in foundry heat-resistant nickel alloys is considered. Based on the influence of elements on phase formation, the coefficient of the ratio of alloying elements Kg¢ in the alloys of this class was first developed. \u0000A close correlation dependence of the ratio Kg¢ with a dimensional discrepancy between the γ- and γ-phases crystalline lattice (localized) was found. It has also been shown that for multi-component nickel systems it is possible to predict with high probability misfit, which significantly affects the strength characteristics of alloys of this class. \u0000The regression models of correlation dependencies on dimensional inconsistency (γ / γ'-misfit) are given, which allow to predict the boundaries of short-term and long-term strength of alloys. It is shown that the magnitude of the misfit at the operating temperature should tend to zero. This will increase the structural stability by minimizing structural stresses, which has a positive effect on the strength and plastic characteristics. \u0000Scientific novelty. For the first time, a coefficient of the ratio of alloying elements Kg¢, which has a close correlation with the strength and dimensional discrepancy of casting nickel-base superalloys, is proposed. \u0000Practical value. The perspective and effective direction in solving the problem of forecasting of the main characteristics affecting the complex of service properties of alloys, both in the development of new monocrystalline nickel-base superalloys, and in the improvement of the composition of known industrial brands of this class, is shown. \u0000 ","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121642408","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 bases of tool making from die steel 4Х3Н5М3Ф","authors":"O. Sydorchuk","doi":"10.15588/1607-6885-2021-3-3","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-3","url":null,"abstract":"","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126339296","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 study of the structure and mechanical properties of T and K + Al + N + Ti steels after casting and hot plastic deformation (HPD)","authors":"O. Babachenko, N. Filonenko, H. Kononenko","doi":"10.15588/1607-6885-2021-3-02","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-02","url":null,"abstract":"Purpose. To perform comparative studies of structural features and mechanical properties of test steel for railway wheels with microalloy complex Al + N + Ti and known steel for high-strength railway wheels of brand T, microalloyed with vanadium. \u0000Methodology. Microstructural, micro-X-ray spectral and X-ray phase analyzes were used to determine the structural state of the alloys. \u0000Results. Comparative analysis of the structure and mechanical properties of steels for high-strength railway wheels of brand T and K + Al + N + Ti. It is shown that in K + Al + N + Ti steel after crystallization the structure becomes finer-grained and increase in the volume fraction of perlite was observed in comparison with steel of T brand. It was found that the HPD leads to the decrease in the volume fraction and size of oxides, and in aluminum oxides Al2O3 there is a partial replacement of aluminum atoms by iron and titanium atoms. \u0000Originality. It is shown that the reduction of vanadium content in steel and complex alloying with aluminum, titanium and nitrogen leads to the formation of the finer-grained structure and increase in the volume fraction of fine perlite. In the microstructure of K + Al + N + Ti steel, the formation of oxides, nitrides and carbonitrides was observed, which were located along the grain boundaries and in the body of the perlite grain. \u0000It was shown for the first time that HPD leads to the fact that in the inclusions of aluminum oxides Al2 O3 the partial replacement of aluminum atoms by atoms of iron or titanium, with the formation of oxides of Fe2(Al)O3 and (Al, Ti)2O 3, take place. \u0000Practical value. The use of complex alloying of steel leads to improvement of mechanical properties: increase in toughness at the high level of hardness and strength of steel grade K + Al + N + Ti in comparison with steel of brand T. \u0000 ","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114550935","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 technical and technological automobile analysis considering the evolution of design parameters","authors":"I. Khmelov, O. Protsyk, I. Danylenko","doi":"10.15588/1607-6885-2021-3-12","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-12","url":null,"abstract":"The method of technical and technological automobile analysis considering the evolution of design parameters","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123299294","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":"Application of modern environmentally safe surface hardening technologies during nitrogening","authors":"O. Nesterov, О. Klimov, D. Tkach, V. Ruban","doi":"10.15588/1607-6885-2021-3-4","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-4","url":null,"abstract":"Purpose of work. The possibility of using ion-plasma nitriding as an ecologically safe process of surface strengthening to improve service properties of products made of ekonomicalle alloyed ferritic steels was shown. \u0000Research methods. Samples from steel 03Х8СЮ were investigated. Nitriding was carried out on an installation of the ION-20-I2 model. The pressure and temperature of the process were varied to obtain nitrided layers of different morphology. The structure of the nitrided layers was examined with an Axio Observtr.DLM microscope (Karl Zeis, Germany). The phase composition of the hardened layer of experimental steel was determined on the DRON-type diffractometer according to standard methods. Comparative studies of corrosion resistance were carried out in accordance with GOST 9.908-85. \u0000Results. It has been established that the method of ion-plasma nitriding can be used to obtain high-quality nitrided layers on the surface of products made of ekonomicalle alloyed ferritic steels. The examined steel is suitable for nitriding in a wide range of technological parameters: temperature, saturation gas pressure. It was found that with an increase in the nitriding temperature, the number of layers, their size and structure in the formed layers change. The optimal mode of ion nitriding (T = 540 °С, t = 4 years, P = 4 mbar) has been determined, which makes it possible to obtain a structure most suitable for solving the problem posed – increasing the corrosion resistance during operation in corrosive environments. Based on the results of determining the phase composition of the samples subjected to ionic nitriding of surface layers, the following phases were found: a- solid solution based on iron and g¢- (MeFe4N)- solid solution based on the chemical compound of iron nitride FeMe4N. The study of corrosion resistance confirmed the efficiency of ion nitriding of steels: the area of corrosion damage on a non-nitrided sample is 85 %, and on a sample after nitriding – 15 %. \u0000Scientific novelty. The possibility of obtaining nitrided layers of a given composition for economically alloyed ferritic steels by ion-plasma technology using ammonia as a saturating medium has been shown for the first time. \u0000Practical value. The developed ion nitriding technology is applicable for all economically alloyed ferritic steels and has a number of advantages: reduction of the process by eliminating additional depassivation; reducing the initial cost of electricity by reducing the energy consumption of plasma production; ecological safety, which is associated with the possibility of using an anhydrous environment.","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125213729","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":"mproving the properties of steels by producing in their structure along with other components of metastable austenite and the following hardening","authors":"L. Malinov, V. Malinov, D. Burova","doi":"10.15588/1607-6885-2021-3-6","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-6","url":null,"abstract":"The relevance. Improving the mechanical properties of steels and their wear resistance makes it possible to increase the service life of machine parts, which is an important task of materials science. One of the promising directions in its solution is combined processing technologies of steels based on the principle of obtaining in them in various ways a structure containing, along with other components (various types of martensite, lower bainite, in some cases carbides) of an increased amount (³ 25 %) of metastable austenite, and subsequent strengthening. In this case, a certain amount of austenite transforms into deformation martensite, and the its remaining part undergoes dynamic deformation martensitic transformation (DDMT) – the effect of self-hardening under loading (SHL). Combined processing technologies include thermal (in some cases, chemical-thermal) and deformation effects on the metal, carried out in various combinations and sequences. Processing technologies for obtaining an increased amount of metastable austenite in the structure of steels can include: holding in the intercritical temperature interval (ICTI) with various hardening methods, plastic deformation stabilizing austenite with respect to the formation of cooling martensite, thermal cycling, etc. Strengthening of steels with an increased amount of metastable austenite is carried out by cold plastic deformation, after which tempering is carried out in some cases. However, the principle is currently being considered and the combined processing technologies that implement it are not used in industry. This excludes the use of metastable austenite, which is an internal resource of the material itself, and its transformation under loading, which increases its ability to self-defense against destruction during testing of properties and operation. In this regard, it is advisable to introduce the proposed combined processing technologies into practice, which will ensure resource saving. In work on a number of steels their effectiveness has been shown. \u0000Рurpose is to show the possibility of increasing the mechanical properties or wear resistance of the studied steels by using combined processing technologies based on the principle that provides for the production of an increased amount of metastable austenite in their structure and subsequent hardening, which preserves the possibility of DDMT and the implementation of the effect SHL. \u0000Research methods. Durometric, metallographic and X-ray research methods were used. The tensile properties and impact strength, as well as abrasive wear resistance, were determined. These properties were compared with those obtained for the studied steels after a typical heat treatment. \u0000Results. It is shown that the proposed combined treatment technologies, including the production of an increased amount of metastable austenite in the structure of the studied steels and subsequent hardening, which retains the possibility of DDMT and the implementation o","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133893444","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":"Mathematical modeling of selective dissolution of AISI 304 steel in circulating chloride-containing waters during operation of heat exchangers","authors":"А. Narivskii, Т. Pulina, S. Subbotin","doi":"10.15588/1607-6885-2021-3-7","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-7","url":null,"abstract":"Purpose. Investigation of the effect of chloride-containing medium, chemical composition and structural heterogeneity of AiSi304 steel on selective dissolution of metals ΔCr, ΔNi and ΔFe from stable pits. \u0000Research methods. X-ray structural analysis, optical microscopy, energy dispersive microanalysis, analysis of the developed linear regression mathematical models of the second order for corrosion losses of metals from pits. \u0000Results. Based on the analysis of the developed linear regression mathematical models of the second order for corrosion losses of metals from pits, it was found that ΔFe from pits on the surface of AISI 304 steel in model circulating water with pH = 4...8 and chloride concentration of 300 and 600 mg / l decrease with an increase in it. the amount of oxides (1.98...3.95 microns), the average diameter of the austenite grain and increase when the average distance between the oxides and the volume of b- ferite in steel increases. It is proved that ΔNi from pits decreases with an increase in the amount of oxides in steel (1.98...3.95 μm), the volume of b- ferite and a decrease in the average diameter of austenite grain. \u0000It was determined that ΔCr of steel from pits mainly depends on the concentration of chlorides in the model circulating water, the amount of oxides (1.98 ... 3.95 μm), the average diameter of the austetin grain and the volume of b-ferite. It is hypothesized that this is due to the intensity of adsorption of chlorine ions on imperfections in the structure of AISI304 steel near these oxides at the intersection with the grain boundaries of austenite, where pits nucleate and grow. \u0000Scientific novelty. It was established for the first time that the coefficient of selective dissolution of Cr from pits on the surface of AISI 304 (ZCr ) steel in the circulating waters of the river decreases with an increase in the volume of b-ferite in the steel, the average diameter of austenite grain and a decrease in the amount of oxides. This can facilitate the transition of metastable pits to stable ones. Moreover, this process is autocatalytic; therefore, it does not depend on the parameters of the model circulating water. \u0000Statement of tasks. Based on the established features of selective dissolution of ΔCr, ΔNi and ΔFe from pits on the surface of AISI304 steel, to study the effect of its plastic defermation on pitting resistance in chloride-containing model circulating waters. \u0000Practical value. The developed mathematical models are used to assess the pitting resistance of AISI304 steel in model circulating waters, depending on its parameters and the environment where heat exchangers made of this steel operate.","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127907518","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":"Features of the design calculation of forming-gulf-beating departments of foundry shops","authors":"V. Naumik, V. Sazhnev","doi":"10.15588/1607-6885-2021-3-10","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-10","url":null,"abstract":"Features of the design calculation of forming-gulf-beating departments of foundry shops","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126380920","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":"Introduction of didactic method of modeling in the educational process in physics: practical aspect","authors":"L. Gulyaeva","doi":"10.15588/1607-6885-2021-3-13","DOIUrl":"https://doi.org/10.15588/1607-6885-2021-3-13","url":null,"abstract":"Introduction of didactic method of modeling in the educational process in physics: practical aspect","PeriodicalId":423067,"journal":{"name":"Innovative Materials and Technologies in Metallurgy and Mechanical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129558426","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}