Effect of an Oxy-Sulphide Inoculant Enhancer on Graphite Parameters in the Mould Inoculated Compacted Graphite Cast Iron
Journal Title: Analele Universitatii "Dunarea de Jos" din Galati. Fascicula IX, Metalurgie si Stiinta Materialelor - Year 2014, Vol 37, Issue 3
Abstract
In compacted/vermicular graphite cast iron production, inoculation is applied to limit the formation of carbides, but usually this treatment also promotes nodular graphite with improved nodularity. The main objective of the present paper is to examine the graphite phase characteristics in these irons, as affected by different in the mould inoculation variants, for resin sand mould castings. Graphite shape factors illustrate the loss of compactness of the graphite particles in the surface layer of the casting and its variation with cooling rate changes, especially with the circularity expression. In the surface layer, up to 0.5 mm from the cast surface, inoculation increased graphite nodularity, with the performance of the inoculant enhancer alloy [OS-IE] treated iron also promoting a high nodularity through the section of casting. A specific effect of inoculation with this alloy is the formation of a high number of small graphite nodules, which is accompanied by higher nodularity and the highest levels for the circularity and sphericity shape factors. Inoculation with the (Ca+OS-IE) dual addition led to the highest compacted/vermicular graphite formation sensitivity, with limited nodular graphite formation.
Authors and Affiliations
Mihail Ciprian FIRICAN, I. C. ȘTEFAN, I. RIPOȘAN
Keywords
Related Articles
- EP ID EP587901
- DOI -
- Views 81
- Downloads 0
Evolution of Some Structural Fine Parameter in the Superficial Layer during Low Cycle Fatigue Process
Using laminate samples, investigations have been realized at variable solicitation of pure bending on a patented machine. The machine has two working places and it can be adjusted for different deformations, frequencies...
Basic Mathematical Modeling of the Environmental Processes in the Lower Danube Region [I]
In most environmental pollution problems, the pollutant is released to the environment by the, almost always, turbulent flow of a carrier fluid. The pollutant mixes with the surrounding fluid (air or water) and undergoes...
Chemical and Structural Changes for Bimetallic Materials Obtained by the Welding Process
This paper presents the transformations which take place during the obtaining process of bimetallic materials. As a plating process was used the welding. The added material was a bronze with aluminum complex alloyed with...
Utilisation of Electrochemical Methods for Characterization of same Corrosion Inhibitors for Steel and Copper
The effect of chromate and molybdate on the corrosion inhibition of copper and steel has been investigated in two eutectics solution at room temperature. We used stationary electrochemical methods and optical microscopy...
The Computation of the Calender Rolls Deflection Using the Stone-Gaevski Formulae
This paper presents new models for the change of the internal configuration of the paper calender rolls with extension to those for plastics and rubber, and the deflection calculation procedure using Stone-Gaevski formul...