Pub Date : 2019-12-15DOI: 10.17073/1997-308x-2019-4-44-54
B. Gasanov, V. G. Tamadaev, V. O. Bogachev, E. R. Makhmudova
powders. The study demonstrates the effect of sodium silicate (Na 2 O–SiO 2 ) concentration in the water solution on the kinetics of dielectric coating formation on different iron powder grades, as well as on their weight gain, average coating thickness, as well as physical and process characteristics. It is experimentally established that the influence of iron powder particle morphology and surface tension coefficient at solid-liquid interface on the coating thickness can be assessed indirectly by the wettability indicators, in particular, by the contact angle. The features of SMCM interlayer boundary structure formation are described. Elemental mapping using the energy dispersive X -ray spectrometer shows that after sample pressing at 600 MPa and their subsequent heating within 400–600 °C, the coating thickness changes and silicon is partially redistributed in the dielectric layer. This is determined by the fact that silicon featuring higher oxophilicity than iron actively reacts with oxygen adsorbed on the iron particle surface and/or reduces iron oxides forming SiO 2 in the form of a dense film, which on the one hand protects iron particles from oxidation, and on the other hand forms a dielectric layer in the zone of iron particle contact that affects specific magnetic losses. It is determined that the distinctive feature of coated iron powder compaction is the structural deformation predominance during pressing since the coating reduces the internal friction coefficient. It is shown that according to its magnetic characteristics, the developed SMCM meets essential contemporary requirements for soft magnetic composite materials.
{"title":"Kinetics of dielectric coating formation on iron powders to obtain soft magnetic composite materials","authors":"B. Gasanov, V. G. Tamadaev, V. O. Bogachev, E. R. Makhmudova","doi":"10.17073/1997-308x-2019-4-44-54","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-4-44-54","url":null,"abstract":"powders. The study demonstrates the effect of sodium silicate (Na 2 O–SiO 2 ) concentration in the water solution on the kinetics of dielectric coating formation on different iron powder grades, as well as on their weight gain, average coating thickness, as well as physical and process characteristics. It is experimentally established that the influence of iron powder particle morphology and surface tension coefficient at solid-liquid interface on the coating thickness can be assessed indirectly by the wettability indicators, in particular, by the contact angle. The features of SMCM interlayer boundary structure formation are described. Elemental mapping using the energy dispersive X -ray spectrometer shows that after sample pressing at 600 MPa and their subsequent heating within 400–600 °C, the coating thickness changes and silicon is partially redistributed in the dielectric layer. This is determined by the fact that silicon featuring higher oxophilicity than iron actively reacts with oxygen adsorbed on the iron particle surface and/or reduces iron oxides forming SiO 2 in the form of a dense film, which on the one hand protects iron particles from oxidation, and on the other hand forms a dielectric layer in the zone of iron particle contact that affects specific magnetic losses. It is determined that the distinctive feature of coated iron powder compaction is the structural deformation predominance during pressing since the coating reduces the internal friction coefficient. It is shown that according to its magnetic characteristics, the developed SMCM meets essential contemporary requirements for soft magnetic composite materials.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73007076","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}
Pub Date : 2019-12-15DOI: 10.17073/1997-308x-2019-4-14-20
V. Gorshkov, P. Miloserdov, N. Khomenko, N. Sachkova
{"title":"Production of cast materials based on Cr2AlC MAX phase by SHS metallurgy using coupled chemical reaction","authors":"V. Gorshkov, P. Miloserdov, N. Khomenko, N. Sachkova","doi":"10.17073/1997-308x-2019-4-14-20","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-4-14-20","url":null,"abstract":"","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86002370","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}
Pub Date : 2019-12-15DOI: 10.17073/1997-308x-2019-4-4-13
V. Dorofeyev, A. Sviridova, L. Svistun
{"title":"The effect of sodium microalloying on the rolling contact fatigue and mechanical properties of hot-deformed powder steels","authors":"V. Dorofeyev, A. Sviridova, L. Svistun","doi":"10.17073/1997-308x-2019-4-4-13","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-4-4-13","url":null,"abstract":"","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85244595","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}
Pub Date : 2019-09-26DOI: 10.17073/1997-308x-2019-3-26-35
G. A. Pribytkov, M. G. Krinitsyn, V. Korzhova, A. Baranovskiy
The TiC + Al binder metal matrix composites were obtained by self-propagating high-temperature synthesis (SHS) in the reactive powder mixtures of titanium, carbon (carbon black) and aluminum. It was found that a steady-state wave combustion occurs when the aluminum powder content in reactive mixtures does not exceed 50 wt.%. Loose SHS cakes obtained during synthesis were crashed and screened to get lumpy, nearly equlaxial composite powders favorable to good flowability necessary for powder application in cladding and spraying of wear-resistant coatings. The synthesis products were studied by scanning electron microscopy, X-ray diffraction (XRD) and local energy-dispersive X-ray spectroscopy (EDX). It was found that the average size of carbide inclusions in the composite structure depends on the content of thermally inert aluminum powder in the reaction mixtures. The titanium carbide lattice parameter determined by XRD turned out to be slightly below the known values for equiatomic titanium carbide. However, no any dependence of the lattice parameter on the aluminum content in composites was found. TiC inclusions in the composite structure were investigated by EDX spectroscopy. Titanium content in the carbide was close to that in equiatomic titanium carbide. Titanium carbide contains up to 2.5 wt.% aluminum in addition to titanium and carbon. Aluminum dissolution in the carbide lattice can influence the lattice parameter.
{"title":"Structure and phase composition of SHS products in titanium, carbon and aluminum reactive mixtures","authors":"G. A. Pribytkov, M. G. Krinitsyn, V. Korzhova, A. Baranovskiy","doi":"10.17073/1997-308x-2019-3-26-35","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-26-35","url":null,"abstract":"The TiC + Al binder metal matrix composites were obtained by self-propagating high-temperature synthesis (SHS) in the reactive powder mixtures of titanium, carbon (carbon black) and aluminum. It was found that a steady-state wave combustion occurs when the aluminum powder content in reactive mixtures does not exceed 50 wt.%. Loose SHS cakes obtained during synthesis were crashed and screened to get lumpy, nearly equlaxial composite powders favorable to good flowability necessary for powder application in cladding and spraying of wear-resistant coatings. The synthesis products were studied by scanning electron microscopy, X-ray diffraction (XRD) and local energy-dispersive X-ray spectroscopy (EDX). It was found that the average size of carbide inclusions in the composite structure depends on the content of thermally inert aluminum powder in the reaction mixtures. The titanium carbide lattice parameter determined by XRD turned out to be slightly below the known values for equiatomic titanium carbide. However, no any dependence of the lattice parameter on the aluminum content in composites was found. TiC inclusions in the composite structure were investigated by EDX spectroscopy. Titanium content in the carbide was close to that in equiatomic titanium carbide. Titanium carbide contains up to 2.5 wt.% aluminum in addition to titanium and carbon. Aluminum dissolution in the carbide lattice can influence the lattice parameter.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75331989","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}
Pub Date : 2019-09-26DOI: 10.17073/1997-308x-2019-3-65-72
В. Е. Баженов, Е. С. Храмченкова, А. В. Колтыгин, С. В. Прищепов, И. В. Шкалей
Recent decades jewelry manufacturers put into practice using of non-precious alloys in order to decrease the production costs. Nevertheless, the large number of customers has allergic (sensitizing) body reaction on jewelries. Applying of non-sensitizing coating is able to decrease negative influence of jewelry material on human body. One of the biologically inert materials toward to human body tissues is zirconium. In the present work we examined the zirconium-based coatings applied by magnetron sputtering. Eleven coating regimes of AISI 430 steel substrates by zirconium oxynitride were investigated. Coatings corrosion test in Hank’s solution, microhardness measurements, color performance in CIE 1976 L*a*b* and RGB color spaces were carried out. The coating width was 0.4–1.2 μm. It was established that coatings have microhardness 2.5–3.0 GPa and can simulate jewelries colors. Using energy dispersive X-ray spectroscopy, it was evaluated that coatings consist of Zr, N and O. We select the sputtering regimes which provides metallic type coatings with the high optical reflectivity in the energy range near the infrared part of spectrum (<1.7 eV) and has golden color with a high lightness. It was experimentally proved that coatings are not corroding in Hank’s solution. The allergy patch test of jewelry with zirconium oxynitride coating demonstrate a good result on respondents with sensitizing reaction to non-precious alloys jewelry. The obtained results allow us to recommend the application of a zirconium-based coating magnetron sputtering in manufacturing of the non-precious alloys jewelry.
{"title":"Non-sensitizing Zr–O–N coatings for jewelry made of non-precious alloys","authors":"В. Е. Баженов, Е. С. Храмченкова, А. В. Колтыгин, С. В. Прищепов, И. В. Шкалей","doi":"10.17073/1997-308x-2019-3-65-72","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-65-72","url":null,"abstract":"Recent decades jewelry manufacturers put into practice using of non-precious alloys in order to decrease the production costs. Nevertheless, the large number of customers has allergic (sensitizing) body reaction on jewelries. Applying of non-sensitizing coating is able to decrease negative influence of jewelry material on human body. One of the biologically inert materials toward to human body tissues is zirconium. In the present work we examined the zirconium-based coatings applied by magnetron sputtering. Eleven coating regimes of AISI 430 steel substrates by zirconium oxynitride were investigated. Coatings corrosion test in Hank’s solution, microhardness measurements, color performance in CIE 1976 L*a*b* and RGB color spaces were carried out. The coating width was 0.4–1.2 μm. It was established that coatings have microhardness 2.5–3.0 GPa and can simulate jewelries colors. Using energy dispersive X-ray spectroscopy, it was evaluated that coatings consist of Zr, N and O. We select the sputtering regimes which provides metallic type coatings with the high optical reflectivity in the energy range near the infrared part of spectrum (<1.7 eV) and has golden color with a high lightness. It was experimentally proved that coatings are not corroding in Hank’s solution. The allergy patch test of jewelry with zirconium oxynitride coating demonstrate a good result on respondents with sensitizing reaction to non-precious alloys jewelry. The obtained results allow us to recommend the application of a zirconium-based coating magnetron sputtering in manufacturing of the non-precious alloys jewelry.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79508079","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}
Pub Date : 2019-09-26DOI: 10.17073/1997-308x-2019-3-42-48
T. I. Ignatieva, A. G. Tarasov, V. N. Semenova, I. A. Studenikin, Yu. A. Karozina Yu.A.
The article presents the results obtained in the corrosion resistance study of TiB2/TiN eutectic alloy powder in HCl and HNO3 mineral acids. Experiments were carried out on samples synthesized in the combustion mode and then ground in an agate vessel. The morphology, size distribution and specific surface area of particles were determined in the obtained powder samples. Corrosion resistance experiments were conducted with varying acid concentration from 0.2 to 6.0 M and process temperature from 25 to 80 °C. Chemical analysis of the studied products of interaction with an aggressive medium was carried out to determine the content of main elements in them (titanium, boron, nitrogen) using methods developed for refractory compounds. As a result of the work carried out, it was shown that samples have the greatest resistance when interacting with solutions of diluted acids at room temperature, and their resistance decreases as acid concentration and/or process temperature rises. It was found that interaction with the acid occurs with both TiB2 and TiN phases in all cases considered in the paper. At the same time, the reaction involving the TiB2 phase was faster. For the first time deep corrosion and corrosion resistance of the alloy in HCl and HNO3 media were measured at room temperature and 1.0 M acid concentration. Based on the obtained data, the investigated alloy was classified as a «resistant» material. Corrosion resistance by a ten-point scale in HCl and HNO3 media was «4» and «5», respectively.
{"title":"Investigation of TiB2–TiN eutectic alloy obtained by combustion synthesis for chemical resistance in mineral acid media","authors":"T. I. Ignatieva, A. G. Tarasov, V. N. Semenova, I. A. Studenikin, Yu. A. Karozina Yu.A.","doi":"10.17073/1997-308x-2019-3-42-48","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-42-48","url":null,"abstract":"The article presents the results obtained in the corrosion resistance study of TiB2/TiN eutectic alloy powder in HCl and HNO3 mineral acids. Experiments were carried out on samples synthesized in the combustion mode and then ground in an agate vessel. The morphology, size distribution and specific surface area of particles were determined in the obtained powder samples. Corrosion resistance experiments were conducted with varying acid concentration from 0.2 to 6.0 M and process temperature from 25 to 80 °C. Chemical analysis of the studied products of interaction with an aggressive medium was carried out to determine the content of main elements in them (titanium, boron, nitrogen) using methods developed for refractory compounds. As a result of the work carried out, it was shown that samples have the greatest resistance when interacting with solutions of diluted acids at room temperature, and their resistance decreases as acid concentration and/or process temperature rises. It was found that interaction with the acid occurs with both TiB2 and TiN phases in all cases considered in the paper. At the same time, the reaction involving the TiB2 phase was faster. For the first time deep corrosion and corrosion resistance of the alloy in HCl and HNO3 media were measured at room temperature and 1.0 M acid concentration. Based on the obtained data, the investigated alloy was classified as a «resistant» material. Corrosion resistance by a ten-point scale in HCl and HNO3 media was «4» and «5», respectively.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88449655","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}
Pub Date : 2019-09-26DOI: 10.17073/1997-308x-2019-3-36-41
A. A. Kondakov, A. Karpov, V. Grachev, A. Sytschev
The TiN/TiAl3/Ti2AlN composite material was obtained by filtration combustion of the porous TiAl intermetallic samples in gaseous nitrogen. X-ray phase analysis of combustion products provided data to calculate the weight content of each phase as follows: 42 wt.% TiN, 35 wt.% TiAl3, 20 wt.% Ti2AlN and 3 wt.% TiAl. The synthesized composite material containing Ti2AlN МАХ phase features good electrical conductivity of a metallic nature. Specific electrical resistance of the synthesized material was measured by a standard 4-point procedure at constant current in the temperature range 300–1300 K in vacuum 2·10–3 Pa. It was found that specific electrical resistance grows linearly from 0.35 to 1.25 μΩ·m as temperature rises. Subsequent measurements of this indicator at the following heating/cooling cycles demonstrated full agreement of obtained results. This fact indicates that the material has stable electrophysical properties in the investigated temperature range.
{"title":"Temperature dependence of TiN/TiAl3/Ti2AlN composite material electric resistivity","authors":"A. A. Kondakov, A. Karpov, V. Grachev, A. Sytschev","doi":"10.17073/1997-308x-2019-3-36-41","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-36-41","url":null,"abstract":"The TiN/TiAl3/Ti2AlN composite material was obtained by filtration combustion of the porous TiAl intermetallic samples in gaseous nitrogen. X-ray phase analysis of combustion products provided data to calculate the weight content of each phase as follows: 42 wt.% TiN, 35 wt.% TiAl3, 20 wt.% Ti2AlN and 3 wt.% TiAl. The synthesized composite material containing Ti2AlN МАХ phase features good electrical conductivity of a metallic nature. Specific electrical resistance of the synthesized material was measured by a standard 4-point procedure at constant current in the temperature range 300–1300 K in vacuum 2·10–3 Pa. It was found that specific electrical resistance grows linearly from 0.35 to 1.25 μΩ·m as temperature rises. Subsequent measurements of this indicator at the following heating/cooling cycles demonstrated full agreement of obtained results. This fact indicates that the material has stable electrophysical properties in the investigated temperature range.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87186729","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}
Pub Date : 2019-09-26DOI: 10.17073/1997-308x-2019-3-13-25
N. Mofa, B. Sadykov, A. Bakkara, Z. Mansurov
The paper presents the results obtained when studying particles of aluminum-modifier-quartz composites by different physicochemical methods after mechanochemical treatment (MCT) in a planetary centrifugal mill. Graphite (C), polyvinyl alcohol (PVA) and stearic acid (SA) were used as modifiers. To increase the dispersibility of plastic metal powders in the composition (modifier metal), MCT was carried out in the presence of quartz with its mass fraction in the composite ranging from 5 to 20 %. The most significant grinding of aluminum particles was observed with an increase in the graphite content from 5 to 20 %, and SiO2 from 5 to 10 % in the composition of aluminum-modifier-quartz composites. The particle size decreases, while the crystallite size increases with an increase in the quartz content in the composite during the Al–SA–SiO2 system MCT. Al–SA–5%SiO2 showed the maximum defectiveness of aluminum after MCT. For the Al–PVA–SiO2 composition after MCT, an increase in the particle size and, accordingly, a decrease in the specific surface were observed at sufficiently low crystallite size values. It was shown that with an increase in the quartz content in the system, the defective crystal structure of aluminum particles increases as a result of MCT. In this case, the synthesized powder material is a composite formation of aluminum and quartz particles bound by a polymer obtained from polyvinyl alcohol. As a result of Al–modifier–SiO2 mixture MCT, powder activity increases due to the accumulation and redistribution of defects in aluminum particles, as well as changes in the surface structure occurring after modifying additives penetration into the oxide layer to be destroyed. A conceptual model for the transformation of the surface layer and subgrain structure of aluminum particles as a result of MCT is presented.
{"title":"Using mechanochemical treatment to obtain metal powders for energy-intensive combustible compositions. 2. Structure and reactivity of mechanically activated Al–modifier–SiО2 mixtures","authors":"N. Mofa, B. Sadykov, A. Bakkara, Z. Mansurov","doi":"10.17073/1997-308x-2019-3-13-25","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-13-25","url":null,"abstract":"The paper presents the results obtained when studying particles of aluminum-modifier-quartz composites by different physicochemical methods after mechanochemical treatment (MCT) in a planetary centrifugal mill. Graphite (C), polyvinyl alcohol (PVA) and stearic acid (SA) were used as modifiers. To increase the dispersibility of plastic metal powders in the composition (modifier metal), MCT was carried out in the presence of quartz with its mass fraction in the composite ranging from 5 to 20 %. The most significant grinding of aluminum particles was observed with an increase in the graphite content from 5 to 20 %, and SiO2 from 5 to 10 % in the composition of aluminum-modifier-quartz composites. The particle size decreases, while the crystallite size increases with an increase in the quartz content in the composite during the Al–SA–SiO2 system MCT. Al–SA–5%SiO2 showed the maximum defectiveness of aluminum after MCT. For the Al–PVA–SiO2 composition after MCT, an increase in the particle size and, accordingly, a decrease in the specific surface were observed at sufficiently low crystallite size values. It was shown that with an increase in the quartz content in the system, the defective crystal structure of aluminum particles increases as a result of MCT. In this case, the synthesized powder material is a composite formation of aluminum and quartz particles bound by a polymer obtained from polyvinyl alcohol. As a result of Al–modifier–SiO2 mixture MCT, powder activity increases due to the accumulation and redistribution of defects in aluminum particles, as well as changes in the surface structure occurring after modifying additives penetration into the oxide layer to be destroyed. A conceptual model for the transformation of the surface layer and subgrain structure of aluminum particles as a result of MCT is presented.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81812561","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}
Pub Date : 2019-09-26DOI: 10.17073/1997-308x-2019-3-57-64
N. B. Fomicheva, L. M. Nechaev, E. Markova, G. V. Serzhantova
The paper presents the results obtained when studying the structure of surfacing materials based on martensitic-aging Fe–Cr– Ni–Мо и Fe–Co–Ni–Мо alloys obtained by plasma powder surfacing. Silicon was chosen as an alloying element, which made it possible to significantly improve the technical and economic performance of martensitic-aging materials. A comparison of martensitic-aging steels with high-carbon steels showed that the former provide an advantage as a wear-resistant material due to their increased resistance to crack propagation. Microscopic analysis, X-ray diffraction analysis and electron microprobe analysis were used for the research. Surfacing materials were tested for wear and internal friction. Silicon oxide particles and chromium and molybdene silicides involved in the process of alloying material strengthening were found during the experiments. Silicide particle density was determined that varies depending on the amount of silicon in the material. The effect of the silicon content on the material hardness was considered. The data obtained on the structure and phase composition of Fe–Cr–Ni–Мо и Fe–Co–Ni–Мо compounds doped with silicon in both the initial and aged states made it possible to suggest a structural-physical model of their hardening in the course of aging. Results of the experiments showed that the heat treatment process actively influences the wear rate and weight wear reducing their values that is typical for both Fe–Cr–Ni–Мо and Fe–Co–Ni–Мо alloys. Based on these data, a structural-technological model of wear was obtained for the surfacing materials studied.
本文介绍了用等离子体粉末堆焊法制备的Fe-Cr - Ni -Мо和Fe-Co-Ni -Мо合金表面材料的结构研究结果。选用硅作为合金元素，使马氏体时效材料的技术经济性能显著提高。马氏体时效钢与高碳钢的比较表明，前者作为耐磨材料的优势在于其抗裂纹扩展的能力增强。采用显微分析、x射线衍射分析和电子探针分析进行了研究。对表面材料进行了磨损和内摩擦试验。在合金材料强化过程中发现了氧化硅颗粒和铬钼硅化物。测定了硅化物的颗粒密度，其变化取决于材料中硅的含量。考虑了硅含量对材料硬度的影响。通过对Fe-Cr-Ni -Мо和Fe-Co-Ni -Мо掺杂硅化合物在初始和时效状态下的结构和相组成的分析，提出了其在时效过程中硬化的结构物理模型。实验结果表明，热处理工艺对Fe-Cr-Ni -Мо和Fe-Co-Ni -Мо合金的磨损率和重量磨损值有积极影响。在此基础上，建立了所研究表面材料的结构-工艺磨损模型。
{"title":"Structural-technological model of wear for surfacing materials based on Fe–Cr–Ni–Мо and Fe–Co–Ni–Мо","authors":"N. B. Fomicheva, L. M. Nechaev, E. Markova, G. V. Serzhantova","doi":"10.17073/1997-308x-2019-3-57-64","DOIUrl":"https://doi.org/10.17073/1997-308x-2019-3-57-64","url":null,"abstract":"The paper presents the results obtained when studying the structure of surfacing materials based on martensitic-aging Fe–Cr– Ni–Мо и Fe–Co–Ni–Мо alloys obtained by plasma powder surfacing. Silicon was chosen as an alloying element, which made it possible to significantly improve the technical and economic performance of martensitic-aging materials. A comparison of martensitic-aging steels with high-carbon steels showed that the former provide an advantage as a wear-resistant material due to their increased resistance to crack propagation. Microscopic analysis, X-ray diffraction analysis and electron microprobe analysis were used for the research. Surfacing materials were tested for wear and internal friction. Silicon oxide particles and chromium and molybdene silicides involved in the process of alloying material strengthening were found during the experiments. Silicide particle density was determined that varies depending on the amount of silicon in the material. The effect of the silicon content on the material hardness was considered. The data obtained on the structure and phase composition of Fe–Cr–Ni–Мо и Fe–Co–Ni–Мо compounds doped with silicon in both the initial and aged states made it possible to suggest a structural-physical model of their hardening in the course of aging. Results of the experiments showed that the heat treatment process actively influences the wear rate and weight wear reducing their values that is typical for both Fe–Cr–Ni–Мо and Fe–Co–Ni–Мо alloys. Based on these data, a structural-technological model of wear was obtained for the surfacing materials studied.","PeriodicalId":14693,"journal":{"name":"Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya","volume":"4 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85116398","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}
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