Studies Regarding the Use of Molding Mixtures Based on Chromite-Sand to the Casting of the Steel Parts

Abstract:

This paper presents a critical analysis of molding technology a steel castings (340-550W steel grade), of the Toothed framework type. This casting is used to manufacture an reducer on 125kW (is a subset of the reducer). In the industrial practice, for the casting by Toothed framework type, cast of steel is used a molding mixture based on chromite-sand, with clayed binders. This type of material is used in the conditions where the quartz sand is not appropriate. However, the critical analysis of the molding-casting technology of the piece analyzed reveals the emergence of the defect called Chromite type crust or Elephant skin. The paper present some solutions to prevent the formation of this type of defect, so that the percentaje of waste casting registered decreased from 4,5% to 3%, which lead to the important economies of the company.

• Periodical: Solid State Phenomena (Volume 254)
• Pages: 243-248
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.254.243
• Online since: August 2016
• Authors: Ana Josan*
• Keywords: Casting, Chromite Sand, Molding Mixtures, Rejects, Steel

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