Some Similarities / Differences between Steel Static and Virtual Brass Static Casting

Abstract

An innovative method for determining the structural zones in the large static steel ingots has been described. It is based on the mathematical interpretation of some functions obtained due to simulation of temperature field and thermal gradient field for solidifying massive ingot. The method is associated with the extrema of an analyzed function and with its points of inflection. Particularly, the CET transformation is predicted as a time-consuming transition from the columnar-into equiaxed structure. The equations dealing with heat transfer balance for the continuous casting are presented and used for the simulation of temperature field in the solidifying virtual static brass ingot. The developed method for the prediction of structural zones formation is applied to determine these zones in the solidifying brass static ingot. Some differences / similarities between structure formation during solidification of the steel static ingot and virtual brass static ingot are studied. The developed method allows to predict the following structural zones: fine columnar grains zone, (FC), columnar grains zone, (C), equiaxed grains zone, (E). The FCCT-transformation and CET-transformation are forecast as sharp transitions of the analyzed structures. Similarities between steel static ingot morphology and that predicted for the virtual brass static ingot are described.

Archives of Metallurgy and Materials

“…At first, however, the tip radius of columnar cell or dendrite is forming and eventually its value decides on the structure spacing, [3]. it is substantiated, because the solidification occurs under steady conditions during continuously cast alloys (the initial transient period of the process under investigation, is not taken into account, [4]). Finally, some relationships can be formulated as an adequate polynomial (named as the Growth Law) which relates the tip radius with the solidification rate.…”

Archives of Foundry Engineering

“…However, currently more and more emphasis, in the context of forming alloys properties, is being attached to the ecological factor [14][15][16][17] and virtualization and process modeling [18][19]. Harmful elements from the group of heavy metals should be, in a maximal possible way, eliminated from alloys, i.e.…”

“…Ordinary casting lead-free brasses, containing 10 to 40% of zinc, as well as arsenic brasses of an increased resistance to dezincification are well suited for the socalled eco-brasses. A wide group of Cu-Zn alloys, mainly low-zinc, is applied for producing semi-products and elements of machines and devices in the form of sections -extruded and drawn -of various dimensions and cross-sections [19]. Ordinary brasses are also casting brasses.…”