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  • PDF Prediction of Riser Carbon Macrosegregation due to ...

    due to Shrinkage Flow in Steel Casting Kent D. Carlson and Christoph Beckermann 1 Department of Mechanical and Industrial Engineering The University of Iowa, Iowa City, IA 52242 Abstract A new simulation model developed that predicts carbon macrosegregation is in and below risers due to feeding flow in steel castings.

  • Segregation in cast products

    Figure 1 presents a typical carbon segregation pattern in a CC steel slab. The problem of centreline segregation has been found to be more serious in high carbon steels. This segregation of solute elements, expecially carbon, results in inconsistent transformation products (i.e. martensite, bainite) during subsequent hot working, and causes non-

  • PDF Final Report on Segregation in Small Steel Castings

    SMALI STEEL CASTINGS SI.vIEMLNI OF PROBLEM Ihe occurrence of high -carbon areas near reduced sections in steel castings was first described in ap earlier NRL ' epor* and In a subsequent publication.' It was shown that this type of segregation frequently occurs near blind riser and "knocK-off riser necks. It was con-

  • (PDF) Reducing macro segregation of high carbon steel in ...

    Grade of network and banded carbide in hot-rolled steel decreased accordingly, especially for centre carbon segregation ratio with 0.96∼1.08, grade of network and banded carbide could be ...

  • PDF Influence of carbon content on the segregation processes ...

    castings. The increased, due to segregation processes, content of carbon, chromium and molybdenum within the solidification grain boundaries makes that carbides can precipitate already in the liquid state, what increases the propensity for hot cracking. The molybdenum content, in a cast steel of increased carbon content, varies from ~4% in the

  • Segregation of Elements in Continuous Cast Carbon Steel ...

    segregation of elements in continuous cast carbon steel billets designated for long products This article presents research results concerning designation of the scope of segregation of elements ...

  • Effect of Cr/Mn segregation on pearlite-martensite banded ...

    The effect of Cr/Mn segregation on the abnormal banded structure of high carbon bearing steel was studied by reheating and hot rolling. Utilizing optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM) and electron-probe microanalyzer (EPMA), the segregation characteristics of alloying elements in cast billet and their relationship with hot rolled ...

  • Segregation and Banding in Carbon and Alloy Steel | 2013 ...

    Krauss, George, "Solidification, Segregation and Banding in Carbon and Alloy Steels," Metallurgical and Material Transactions B, Volume 34B, December 2003, pp. 781 - 792. Majka, Ted F., David K. Matlock and George Krauss, Development of Microstructural Banding in Low-Alloy Steel with Simulated Mn Segregation , Metallurgical and Materials ...

  • PDF Simulation of Convection and Macrosegregation in Steel Casting

    of segregation phenomena in cast steel. Many of the experimental studies have focused on the ... (3-D) geometries typical of steel castings. In this article, a recently developed extension of an existing 3-D casting simulation code ... the carbon and less than 10% of the sulfur present in the liquid is incorporated into the solid at this

  • PDF Macro segregation in steel ingots - castingsnet.com

    expensive pattern or die manufacture. We use Niyama criteria to predict porosity in aluminum and steel castings. 2. Ingot solidification simulation service. A-segregation prediction This service allows you to check if the ingot size, shape and chemical composition of steel poured are appropriate to minimize A-

  • [PDF] Morphology and Segregation in Continuously Cast High ...

    Morphology and centerline macrosegregation in continuously cast high carbon steel billet samples were investigated in order to establish the casting behavior of a six strand curved mold billet caster without electro-magnetic stirring. Several billet samples were collected from the continuous casting shop of Tata Steel, India and experimental observations were correlated with the operating ...

  • PDF Inclusions in Continuous Casting of Steel

    of low carbon steel by aluminum 43) Fig. 6 Alumina inclusions formed during the deoxidation of LCAK steel (left: flower-like plate alumina; right: aggregation of small polyhedral particles) 44) Silica inclusions are generally spherical owing to being in a liquid or glassy state in the molten steel.

  • Understanding Contamination From Feeding Aids In Cast Steel

    The castings were poured with low-carbon steel at 1,620°C (2,950°F) and allowed to cool overnight in the molds. Following shakeout, the castings were sectioned to show shrinkage and the feeding pattern. Then, one half of the riser was ground and macro-etched to show areas with potential carbon pickup or alloy segregation.

  • Carbon Steel Casting | Investment Steel Casting ...

    Carbon steel is an iron - carbon alloy with a carbon content of 0.0218% to 2.11%. Cast iron generally has a carbon content of 2.5% to 3.5%. Carbon steel has relatively good strength and toughness and is used to manufacture various mechanical parts and metal products.

  • DoITPoMS - TLP Library Casting - Microstructure and ...

    Segregation in castings. When casting an alloy, segregation occurs, whereby the concentration of solute is not constant throughout the casting. This can be caused by a variety of processes, which can be classified into two types: Microsegregation; which occurs over distances comparable to the size of the dendrite arm spacing.

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