Inverse Chill in Cast Iron

Mechanism of silicon influence on the chill of cast iron

In this work an analytical solution of general validity is used to explain mechanism of the silicon influence on the absolute chill tendency (CT) and chill (w) of cast iron. It is found that CT can be related to nucleation potential of graphite (Nv), growth parameter (μ) of eutectic cells, temperature range (∆Tsc) and the pre-eutectic austenite volume fraction (fγ). It has been shown that silic...

Role of Alloying Additions in the Solidification Kinetics and Resultant Chilling Tendency and Chill of Cast Iron

The present work describes the effect of the solidification processing and alloy chemistry on the chilling tendency index, CT, and the chill, w, of wedge-shaped castings made of cast iron. In this work, theoretical predictions were experimentally verified for the role of elements, such as C, Si, Mn, P and S, on the cast iron CT. In addition, inoculation and fading effects were considered in the...

A Control System Analysis of a Direct-Chill Cast Process of Aluminum Ingots by an Inverse Measured Method

Abstract: A direct-chill (DC) cast process of an aluminum ingot of size 3200×1292×320 mm is analyzed numerically by the analysis of a fixed controlled system. The study investigates the DC processes in which liquid aluminum is cooling continuously in mold and then with water spray at the exit of mold. An inverse method is applied to measure heat transfer coefficient on water cooling surface exp...

Cast Iron Metallurgy

Cast iron (CI) is one of the oldest materials in commercial use. It has excellent compressive strength and is commonly used for structures that require this property, as well as for water and sewer lines. This article explains CI metallurgy and why the understanding of this metallurgy is key to understanding other ferrous materials and alloys. The composition of cast iron (CI) varies significan...

Circumferential failures in grey cast iron pipes