On macrosegregation
Web1 de mar. de 2000 · Macrosegregation now depends on the transport of copper-depleted, free-floating dendrites, as well as copper-rich liquid. Solid fraction contours, mixture streamlines, and temperature contours for Cases 2 and 3 are shown in Fig. 5, Fig. 6, Fig. 7, respectively, 600 s after the simulations have reached their quasi-steady state. WebA reference 500 kg steel ingot with no addition of solid balls was poured to provide a realistic comparison with the typical macrosegregation found in conventional industry heavy ingots. The experiments show that by adding solid balls the degree of macrosegregation is reduced, the formation of A-type segregation is prevented, a generally refined …
On macrosegregation
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Web21 de fev. de 2024 · Macrosegregation is one of the most significant defects which exert a determining effect on the properties of heavy ingots. The objective of this work is to study the influence of segregated ... Web1 de fev. de 2024 · The experiment–simulation comparison of macrosegregation is presented in Fig. 5. The macrosegregation is characterized by its index (c index = (c …
WebMacrosegregation, however, refers to chemical variations over length scales approaching the dimensions of the casting, which for large ingots may be of the order of centimetres … Web24 de mai. de 2024 · Macrosegregation is a very common problem for the quality control of all cast ingots. The effect of current on the structure and macrosegregation in dual alloy ingot processed by electroslag …
Web1 de jan. de 2006 · In continuous casting, the severity of centerline macrosegregation and internal crack formation is linked to the cast structure, which can be minimized by increasing the equiaxed zone. Thus all the factors which favour an equiaxed structure are useful to quality. These are: low superheat, electro magnetic stirring (EMS) in the mould, large … WebMicrosegregation and macrosegregation during weld solidification results in localized variations in composition in the WM. Chromium and molybdenum, two alloying elements that typically promote corrosion passivity to the Ni-base alloys, have a tendency to segregate to interdendritic regions during solidification of the WM.
Web16 de abr. de 2015 · Based on the developed coupled model of electromagnetism, heat and solute transportation, the macrosegregation formation and effect of secondary cooling water ratio on macrosegregation degree in strand during round bloom continuous casting process have been investigated. The solute segregation degree fluctuates from a …
Webobtain the predicted maximum carbon content and represent the macrosegregation degree along the cast-ing direction in continuous casting billets (represented by 82B cord steel). Subsequently, the influence mechanism of the superheat on macrosegregation has been investigated. It’s found that the SEV and the hammam ivry sur seineWebmacrosegregation (uncountable) A variation in the composition of a metal casting caused by irregular movement during solidification; Translations burnt orange flowers bushWebThe effect of electromagnetic field on macrosegregation of continuous casting aluminum alloy was stud-ied. 7075 aluminum alloy ingot with diameter of 200 mm was produced by … burnt orange gaming chairWeb4 de fev. de 2024 · In the present work macrosegregation during solidification of a 2.45 ton steel ingot is simulated with a pure equiaxed model, which was tested previously via modeling of a benchmark experiment. While the columnar structure is not taken into account, a packed layer formed over inner walls of the mold at an early stage of … burnt orange food coloringWeb1 de out. de 2009 · A fully transient model of the direct-chill casting process is used to predict the macrosegregation development of aluminum alloy 7050. The ingot diameter, casting speed, superheat, secondary ... burnt orange fresh flowersWebmacrosegregation in large-sized steel ingots. They reported that lower superheat tended to alleviate the segregation intensity in the upper part of the ingot body and in the hot top. … burnt orange grizzly hackleWebNumerical simulation of effect of thermo-solutal flow on macrosegregation in continuously cast slabs. / Oikawa, Katsunari; Hirata, Naoya; Anzai, Koichi. In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 103, No. 12, 2024, p. 747-754. Research output: Contribution to journal › Article › peer-review burnt orange fur fabric