A. E. Smirnov, N. A. Smirnova, A. V. Perestoronin, G. S. Seval’nev
{"title":"Vacuum Nitriding of Heat-Resistant Steel After Laser Processing","authors":"A. E. Smirnov, N. A. Smirnova, A. V. Perestoronin, G. S. Seval’nev","doi":"10.1007/s11041-024-01019-z","DOIUrl":"10.1007/s11041-024-01019-z","url":null,"abstract":"<p>Features of formation of surface layers in steel VKS-10 (13Kh3N3M2VFB-Sh) under thermal and thermochemical treatments, i.e., laser processing with and without surface fusion and subsequent vacuum nitriding, are considered. The effect of preliminary laser treatment on the kinetics of saturation of the surface with nitrogen is studied. It is shown that the preliminary laser treatment without fusion of the surface followed by nitriding provides a higher effective thickness of the layer on steel VKS-10 and higher wear resistance of the surface than the treatment with fusion.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"66 - 71"},"PeriodicalIF":0.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Sh. Sufiyarov, N. G. Razumov, A. K. Mazeeva, L. V. Razumova, A. A. Popovich
{"title":"Modern Methods of Creation and Application of Powder Ferritic/Martensitic ODS Steels","authors":"V. Sh. Sufiyarov, N. G. Razumov, A. K. Mazeeva, L. V. Razumova, A. A. Popovich","doi":"10.1007/s11041-024-01021-5","DOIUrl":"10.1007/s11041-024-01021-5","url":null,"abstract":"<p>Special features of the process of synthesis of oxide dispersion-strengthened (ODS) ferritic/martensitic steels by powder metallurgy and laser technologies are considered. The process of production of ODS steels is described. The properties of the steels and the possibilities of their additive manufacturing are analyzed.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"76 - 86"},"PeriodicalIF":0.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of the Geometry of Cast Products on Orientation of Dendritic Crystals Growth and Formation of Hot Cracks","authors":"K. V. Makarenko, S. S. Kuzovov","doi":"10.1007/s11041-024-01018-0","DOIUrl":"10.1007/s11041-024-01018-0","url":null,"abstract":"<p>The results of studies of hot cracks formed in cast shapes from low-alloy steel G21Mn5 are presented. Macroand microstructural analyses are carried out. Fractography studies of samples cut from castings used in the production of railway freight cars are performed. The criteria used to assess the susceptibility of alloys to hot brittleness are considered. It is shown that the orientation of dendritic crystals affects significantly the formation of hot cracks, and the direction of the dendrite growth is determined by the conditions of heat dissipation, which are influenced in their turn by the geometry of the casting. The phenomenon of coalescence under the conditions of misorientation of neighbor dendrites and its effect on the formation of hot cracks is studied. A modified RDG criterion is suggested, which allows for the influence of the geometry of the cast product on the formation of hot cracks through the angle of misorientation of neighbor crystals.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"54 - 65"},"PeriodicalIF":0.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of Acid Concentration in Combined Cleaning of Gas Turbine Nozzle Blades from Metal Oxides","authors":"D. D. Fomina, V. Z. Poilov","doi":"10.1007/s11041-024-01026-0","DOIUrl":"10.1007/s11041-024-01026-0","url":null,"abstract":"<p>The method of chemical cleaning of the surface of blades of gas turbine units in a solution of orthophosphoric and sulfuric acids using a purpose-designed closed-type autoclave microwave system “Mars 5” and ultrasonic exposure in distilled water is described. The two-stage cleaning involves the chemical action of the acid solution in the autoclave and ultrasonic cleaning in the stage of washing. The effect of acid solutions of various concentrations on the degree of surface cleaning from metal oxides and microcracks in the gas turbine blades is studied. It is shown that when the samples of gas turbine blades are treated in the “Mars 5” autoclave with a solution of acids and with ultrasound in the washing stage, the residual oxygen content reflecting the presence of oxides on the surface of the samples is less than 1%.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"111 - 114"},"PeriodicalIF":0.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. G. Ovcharenko, M. I. Mokrushina, A. Yu. Leshchev
{"title":"Composition and Structure of Surface Layer in Composite Castings from Gray Cast Iron Formed Using Chromium-Ferroboron Master Alloys","authors":"P. G. Ovcharenko, M. I. Mokrushina, A. Yu. Leshchev","doi":"10.1007/s11041-024-01011-7","DOIUrl":"10.1007/s11041-024-01011-7","url":null,"abstract":"<p>A method for obtaining composite surface-alloyed castings from gray cast iron SCh25 by cavityless casting with the use of master alloys containing chromium and ferroboron deposited as a paste layer on the surfaces of the casting molds is considered. The microstructure and the phase composition of the surface layer and the microhardness of the structural components are determined. Mechanical tests of the cast samples for compression and wear are carried out. Self-propagating high-temperature synthesis is shown to occur between the components of the master alloys deposited on the surfaces the molds during the production of the castings. The types and compositions of the borides and carboborides formed in the alloyed layer are determined. The effect of the parameters of the alloyed layer on the properties of the composite castings is analyzed.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"10 - 16"},"PeriodicalIF":0.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. E. Likhacheva, S. S. Shumkin, A. A. Everstov, E. D. Kurdoglo, E. A. Revin, P. L. Tikhomirov, V. V. Sitnov
{"title":"Investigation of the Effect of Ni – Cu – Ni – Sn Four-Layer Electroplate and Epoxy Paint Coating on Corrosion Properties of NdFeB-Base Magnet","authors":"I. E. Likhacheva, S. S. Shumkin, A. A. Everstov, E. D. Kurdoglo, E. A. Revin, P. L. Tikhomirov, V. V. Sitnov","doi":"10.1007/s11041-024-01015-3","DOIUrl":"10.1007/s11041-024-01015-3","url":null,"abstract":"<p>The possibility of four-layer (Ni – Cu – Ni – Sn) electroplating and epoxy paint coating of a NdFeB magnet from a hard magnetic alloy used in wind generators is considered. The corrosion-protective effect of various paint coatings on the magnet in aggressive environments is determined. It is shown that the electroplate layuer should have a thickness of at least 20 µm and the epoxy paint coating should be no thinner than 15 µm.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"38 - 41"},"PeriodicalIF":0.6,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Yu. Semenov, A. E. Smirnov, L. P. Fomina, Absattarov Salokhiddin Nuritdin-ugli
{"title":"Determination of Carbon Potential and Carbon Mass Transfer Coefficient During Vacuum Carburizing of Steel","authors":"M. Yu. Semenov, A. E. Smirnov, L. P. Fomina, Absattarov Salokhiddin Nuritdin-ugli","doi":"10.1007/s11041-024-01010-8","DOIUrl":"10.1007/s11041-024-01010-8","url":null,"abstract":"<p>The boundary conditions for describing the mass transfer of carbon from oxygen-free low-pressure atmospheres into steel during vacuum carburizing are analyzed. The effect of the content of carbide-forming alloying elements on the values of the carbon potential of low-pressure acetylene atmospheres is determined depending on the temperature of the process of vacuum carburizing. Temperature dependences of the carbon mass transfer coefficient are derived.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"5 - 9"},"PeriodicalIF":0.6,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Yu. Simonov, D. N. Trushnikov, Yu.D. Shchitsyn, E. A. Krivonosova, S. D. Neulybin, G. S. Shaimanov, A. O. Artyomov, M. F. Kartashev
{"title":"Structure, Mechanical Properties and Features of Crack Growth Micromechanism of Maraging Steel Obtained by Hybrid Additive CMT Surfacing","authors":"M. Yu. Simonov, D. N. Trushnikov, Yu.D. Shchitsyn, E. A. Krivonosova, S. D. Neulybin, G. S. Shaimanov, A. O. Artyomov, M. F. Kartashev","doi":"10.1007/s11041-024-01022-4","DOIUrl":"10.1007/s11041-024-01022-4","url":null,"abstract":"<p>The effect of heat treatment (quenching and aging) on the structure and mechanical characteristics of maraging steel Cr12Ni9Mo2Si (EP659A) obtained using a hybrid CMT surfacing technology consisting in multilayer cold metal transfer and layer-by-layer deformation hardening is investigated. Metallographic analysis of the samples is carried out using light and scanning electron microscopes. The local elemental composition of the surfacing is determined. Tensile tests at 20°C and impact tests at 20 and –100°C are performed. The micromechanisms of crack growth and their special features are investigated. The effect of structural segregation of the material during the CMT with deformation without heat treatment is detected. It is shown that the structural segregation in the surfaced layer disappears after the heat treatment; the strength characteristics and the impact toughness increase, and the elongation decreases slightly. The micromechanism of crack growth after the surfacing followed by heat treatment changes from a mixed viscous-quasi-brittle one to a viscous one. To obtain a set of high mechanical characteristics at room and negative temperatures in the material synthesized by CMT surfacing with interlayer forging, it is recommended to carry out a heat treatment involving water quenching from 940°C for 45 min and aging at 520°C for 240 min.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"87 - 95"},"PeriodicalIF":0.6,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Structural Model of Transition of Cubic α-Mn Into a Hexagonal Modification Based on Noncrystallographic Symmetry of Clusters","authors":"A. L. Talis, V. S. Kraposhin","doi":"10.1007/s11041-024-01024-2","DOIUrl":"10.1007/s11041-024-01024-2","url":null,"abstract":"<p>A structural model of the transformation of cubic α-Mn into high-pressure hexagonal close-packed ε -Mn phase is suggested. The model is based on the transformation of a triple of tetrahedrons into an octahedron, implemented through a shift of the diagonal of a nonplanar “rhombus” formed by the faces of neighboring tetrahedrons. Asystem of such transformations transfers a fragment of a tetrahedral α -Mn spiral into a fragment of a rod composed of octahedrons in hexagonal closest packing. The model takes into account the noncrystallographic symmetry of the considered fragments of the crystalline phases.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"101 - 106"},"PeriodicalIF":0.6,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electrolyte-Plasma Production of Metal Powders for Additive Manufacturing","authors":"R. R. Kayumov, A. I. Kuputdinova, A. F. Gaisin","doi":"10.1007/s11041-024-01014-4","DOIUrl":"10.1007/s11041-024-01014-4","url":null,"abstract":"<p>The possibility of production of metal powder of grade “EOS Stainless Steel PH 1” by electrolyte-plasma spraying of finished products manufactured by selective laser melting is considered. The sample is sprayed by gas-discharge plasma at atmospheric pressure in an electrode configuration, where the metal cathode is the sprayed product and the electrolytic anode is a 3% NaCl solution in purified tap water. The current-voltage characteristics of the discharge, the surface temperature of the electrodes, the topography and the elemental composition of the powder are determined.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 1-2","pages":"32 - 37"},"PeriodicalIF":0.6,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}