compacted graphite irons - researchgate

On the solidification of compacted and spheroidal

Spheroidal graphite is also present in smaller amounts in compacted graphite irons (CGI), but its nature and role in this material is less understood. Recent associations of spheroidal graphite in CGI with shrinkage porosity problems highlights the need for better understanding in this area.

Compacted Graphite Iron: Part One :: Total Materia Article

Compacted graphite iron (CGI) along with lamellar graphite iron and spheroidal graphite iron define the three main classes of cast iron according to morphology. CGI displays very useful properties for a range of engineering applications with the tensile strength and elastic modulus being considerably higher than grey cast irons (75% and 35% respectively).

Microstructural study of the mechanical response of

Graphite is an important microstructural constituent in cast irons, which plays a key role in determining the material performance. This work aims at understanding the microstructural phenomena taking place in compacted graphite cast iron (CGI), and in particular the effect of the anisotropy of graphite particles, on the microscale strain partitioning.

Table 1 from Practical Applications for Compacted

Table 1. Mechanical and Physical Properties of 10% Nodularity CGI - Practical Applications for Compacted Graphite Iron As the industrial awareness of Compacted Graphite Iron (CGI) has evolved over the last decade, design engineers have begun to specify CGI

compacted graphite iron_compacted graphite iron

Compacted graphite iron (CGI), also known as vermicular graphite iron (GJV, VG, JV or GGV from the ) especially in non-English speaking countries, is a metal which is gaining popularity in applications that require either greater strength, or lower weight than cast

Compacted graphite iron

Compacted graphite iron (CGI), also known as vermicular graphite iron (GJV, VG, JV or GGV from the German: Gusseisen mit Vermiculargraphit) especially in non-English speaking countries, is a metal which is gaining popularity in applications that require either greater strength, or

The graphite compactness degree in modified irons.

2009/1/1The modified cast irons with compact graphite (ductile irons and compacted graphite irons) are used mainly for the obtaining of cast pieces for the engine construction industry. The research of compacted graphite irons and ductile irons are performed in our university (Eftimie Murgu University of Resita) from over 4 years, being a research domain of continuous interest.

Compacted Graphite Iron: Part One

Compacted graphite iron (CGI) along with lamellar graphite iron and spheroidal graphite iron define the three main classes of cast iron according to morphology. CGI displays very useful properties for a range of engineering applications with the tensile strength and elastic modulus being considerably higher than grey cast irons (75% and 35% respectively).

POROSITY ANALYSIS ON COMPACTED GRAPHITE IRON

Compacted graphite irons exhibit linear elasticity for both pearlitic and ferritic matrices (Figure 5) [10]. Fig. 5: Typical stress-strain curves for CG irons. The pearlitic iron presents a tensile strength of 410 MPa and an elongation of 1%. The ferritic iron shows a

Compacted Graphite Iron lecture notes

Tensile and yield strengths for compacted graphite irons are comparable to values for ductile and malleable irons, yet are greater than those observed for the higher-strength gray irons. In addition, ductilities for CGIs are intermediate between values for gray and ductile irons; also, moduli of elasticity range between 140 and 165 GPa (20 X 10 6 and 24 X 10 6 psi).

Table 1 from Practical Applications for Compacted

Table 1. Mechanical and Physical Properties of 10% Nodularity CGI - Practical Applications for Compacted Graphite Iron As the industrial awareness of Compacted Graphite Iron (CGI) has evolved over the last decade, design engineers have begun to specify CGI

On the Solidification of Compacted and Spheroidal Graphite Irons

graphite is also present in smaller amounts in compacted graphite irons (CGI), but its nature and role in this material is less understood. Recent associations of spheroidal graphite in CGI with shrinkage porosity problems highlights the need for better understanding in this area.

Wear Mechanism when Machining Compacted Graphite Iron

shape and material properties, the most significant difference between gray iron (C125) and compacted graphite iron CGI, respective nodular cast iron SGI is the Sulphur content. Gray cast irons typically contains 0.08- 0.12 per cent sulphur. However

Influence of Section Thickness on the Thermal Conductivity of Compacted Graphite

The compacted graphite irons (CGI) were produced in a step block casting in green sand with 5, 10, 20 and 40 mm thick steps with the calculated and the analyzed chemical composition are shown in Table 3a and Table 3b respectively. Sorely white cast

Technical Introduction to Metallurgical Process Control

Compacted (Vermicular) graphite irons (CGI) have been produced since the inception of spheroidal graphite (nodular or ductile) irons in the late 1940's. Invariably the structure was produced by accident (and still is) due to the breakdown of process control during production of SG.

MACHINING OF GRAY CAST IRONS AND COMPACTED

Abstract: The aim of this paper is to compare the machinability of gray cast iron and compacted graphite iron (CGI), in terms of tool life and microstructure. Two gray cast irons with different graphite morphologies and one CGI were tested. After the tool life tests with carbide and Cubic Boron Nitride (CBN) inserts, microstructural changes on the machined surfaces was investigated and SEM

SOLIDIFICATION BEHAVIOR OF HYPOEUTECTIC AND

Slightly hypoeutectic and eutectic compacted graphite (CG) cast irons were compared with gray irons and ductile irons with the same base chemical analysis, by performing several holding experiments. It was found that the CG iron will exhibit a cooling curve with a temperature of eutectic undercooling (TEU) lower than both the corresponding curves for gray and ductile iron.

Solidification of Flake, Compacted/Vermicular and

Solidification of Flake, Compacted/Vermicular and Spheroidal Graphite Cast Irons as Revealed by Thermal Analysis and Directional Solidification Experiments - Volume 34 Please list any fees and grants from, employment by, consultancy for, shared ownership in or

Characteristics of compacted graphite cast iron

Compacted graphite cast iron (CG cast iron) has some advantages over ductile and gray irons in production and use. Cast irons with compacted graphite can be produced either by deliberate undertreatment with nodularizers or by a simultaneous treatment with nodularizers and antinodularizers.

Compacted Graphite Iron: Part One

Compacted graphite iron (CGI) along with lamellar graphite iron and spheroidal graphite iron define the three main classes of cast iron according to morphology. CGI displays very useful properties for a range of engineering applications with the tensile strength and elastic modulus being considerably higher than grey cast irons (75% and 35% respectively).

ENHANCING RARE EARTH INOCULANT EFFECT IN COMPACTED GRAPHITE CAST IRONS AND INFLUENCE ON GRAPHITE

Enhancing rare earth inoculant effect in compacted graphite cast irons and influence on () 221 Base Iron (50% High purity pig iron + 50% Cast iron scrap) (1317 C) QL Sampling Carburizing (520g graphite powder) (1463 C) QL and QV- OES sampling (1550 C) QL

On the Crystallization of Compacted and Chunky

This is typical for compacted graphite irons and tadpole graphite. The chunky graphite aggregates investigated are conical sectors of graphite platelets stacked along the c-axis. The foliated dendrites that originally develop radially from a common nucleus may aggregate along the c-axis forming blocky graphite that sometimes exhibits helical growth.

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Although the existence of compacted graphite irons has been known for many years [4], only in the last decades were they applied to more spe-cific machinery components. This considerable attention was due to the properties of CG irons that allow this material

A novel material used in automotive industry: compacted

In fact, among the cast iron group, one of the alternatives is lightweight alloys, that is, compacted graphite iron (CGI). Nowadays, it is accepted that CGI can effectively reduce the total weight of an automobile by virtue of its high strength- when compared to other cast irons and aluminum alloys.

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