Assessment of the Low Alloy Cast Steel Inoculation Effects with Chosen Additives

Bartocha, D.; Baron, C.; Suchoń, J.; Kilarski, J.; Szajnar, J.; Sebzda, W.

doi:10.2478/v10266-012-0063-4

Cited by 4 publications

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“…it should be mentioned that both the pouring temperature and conditions of carrying away of heat [1,[11][12][13][14] affect the acoustic properties of alloys, that is, for the same bell shape, it is possible to achieve different acoustic effects depending on the mold technology and method of running castings [15] used by foundries.…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Cekus,

Nadolski

2020

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The subject of the study was to determine the impact of changes in mechanical properties of high-tin bronzes on the basic components of the sound of a bell. Change in the tin concentration in the range of about 7.5 to 20 parts wt. in a casting alloy significantly affects the mechanical properties of the alloy such as Young's modulus or hardness. The free vibrations of bells were obtained with the help of the finite element method. in the numerical analyses the mechanical properties of standard alloys were adopted. The obtained natural frequencies of the bell made of a bronze with different tin concentration in copper were compared with the acoustic properties of a real bell casted on the basis of the same ribs. A significant effect of the increase in the alloying share of tin on the obtained results was stated. in addition, the acoustic analysis of aluminum bronze C95500 have been performed. Based on the obtained results, authors stated that this material can replace the commonly used high tin bronze C91300 for the unit production of bells.

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Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Cekus,

Nadolski

2020

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“…Turbine blades, rotors and piping components [1,2] are produced thereon. The production of duplex type cast steel faces the highest expectations as for the technological process and requires high purity input materials [3]. It is also important to ensure low carbon content in the casting and the use of appropriate modifiers, which significantly increases the cost of production.…”

Section: Introductionmentioning

confidence: 99%

Archives of Foundry Engineering

Kalandyk¹,

Kasińska²,

Skrzypczyk³

2018

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This article discusses the influence of Tungsten Inert Gas (TIG) surfacing of duplex cast steel on its hardness and structure. The samples of 24Cr-5Ni-2.5Mo ferritic-austenitic cast steel were subjected to single-overlay processes with the use of solid wire having the chemical composition similar to that of the duplex cast steel. As a result of the surfacing, the welds were obtained that had no welding imperfections with a smooth transition to the base material. In the test without the heat treatment, directly below the fusion line, we observe a ferrite band with a width of approximately 200 m without visible austenite areas. Some of the samples were then solution treated (1060°C). Both variants, without and after solution heat treatment, were subjected to testing. Significant changes in the microstructure of the joint were observed after the heat treatment process (heat affected zone and weld microstructure changes). In both areas, an increase in the austenite volume fraction after solution heat treatment was observed. Changes in the microhardness of the ferrite in the HAZ area directly below the fusion line were also observed.

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“…The microaddition of Nb and V increase mechanical properties of cast steel, especially after heat treatment, which is greater than the expected one from the degree of change of the chemical composition [13][14]. Scientists dealing with theories of modifications related to refining as well as other theories, consider that the base of classification are only two groups of all the theoretical hypotheses of explanation the phenomenon of modification, which are counted to theories of effect on the crystallization.…”

Section: Introductionmentioning

confidence: 99%

“…The microstructure formation process influence external factors connected with casting technology which forces kinetics of solidification (mass of casting, average wall thickness, thermal properties of mold, way of pouring) as well as internal factors, generally understood as metallurgical and chemical quality of liquid alloy [1,2].…”

Section: Introductionmentioning

confidence: 99%

Influence of Low-Alloy Cast Steel Modification on Primary Structure Refinement, Type and Shape of Non-Metallic Inclusions

Bartocha

Suchoń

Baron

et al. 2015

Archives of Metallurgy and Materials

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In the article there are presented methods and results of investigation which main aim were determination of influence of melting technology (gas extraction, vacuum refining, slag refining and extraction, deoxidation and degassing) and type of used modifiers on the type and shape of non-metallic inclusions and the primary structure refining. Low alloy cast steel melted in laboratory conditions, in an inductive furnace was investigated. Additions of FeNb, FeV, FeTi and FeZr modifiers were applied. The contents of oxygen and nitrogen in obtained cast steel were determined.The most advantageous impact on refining of the primary structure of has been found for the modifiers FeTi+FeZr. In cast steel with the addition of Zr the conglomerates from a different non -metallic inclusions have been observed. Zirconium probably plays role of the nucleus -creating for other inclusions present in the conglomerates. Clusters of inclusions due to their size affect the crystallization and grain growth processes reducing grain size of the primary structure.Keywords: steel cast, primary structure, non-metallic inclusions, modification, grain refinement W pracy przedstawiono założenia, metodykę i wyniki badań, których celem było określenie wpływu technologii wytopu (ekstrakcji gazowej, rafinacji próżniowej, rafinacji i ekstrakcji żużlowej, odtleniania i odgazowania) i rodzajów zastosowanych modyfikatorów na postać i rodzaj wtrąceń niemetalicznych oraz rozdrobnienie struktury pierwotnej. Analizie poddano niskostopowe staliwo wytopione w warunkach laboratoryjnych w piecu indukcyjnym. Zastosowano dodatek modyfikatorów FeNb, FeV, FeTi i FeZr. W uzyskanym staliwie określono zawartość O i N oraz jego skład chemiczny.Stwierdzono najkorzystniejsze, ze względu na rozdrobnienie struktury pierwotnej, oddziaływanie modyfikatora FeTi+FeZr. Zaobserwowano występowanie konglomeratów różnych wtrąceń niemetalicznych w staliwach z dodatkiem Zr, który prawdopodobnie działa zarodkotwórczo na pozostałe wtrącenia wchodzące w skład konglomeratów. Skupiska wtrąceń ze względu na swoje rozmiary wpływały na krystalizację i wzrost ziaren staliwa rozdrabniając jego strukturę pierwotną.

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Assessment of the Low Alloy Cast Steel Inoculation Effects with Chosen Additives

Cited by 4 publications

References 0 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Archives of Foundry Engineering

Influence of Low-Alloy Cast Steel Modification on Primary Structure Refinement, Type and Shape of Non-Metallic Inclusions

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