The formation of a lamellar graphite eutectoid

Grey cast iron is one of the most common engineering materials used to make castings which work in thermal cycling. Under thermal cycling conditions, heat resistance is an important operational property of grey cast iron, which depends to the greatest extent on its structure – size and shape of the graphite inclusions, as well as the metal matrix composition. In this paper, the heat resistance of unalloyed grey cast iron with lamellar and compact graphite distributed in perlitic and perlitic-ferritic metal matrices was determined. The tests were carried out at temperatures of 500 – 800 °C. The results of the studies showed an insignificant difference of perlitic and perlitic-ferritic grey cast iron with lamellar graphite heat resistance. The heat resistance of perlitic ferritic grey cast iron with compact graphite is 16 – 48 % higher than the heat resistance of perlitic ferritic grey cast iron with lamellar graphite. Thus, when the shape of the graphite inclusions changed from lamellar to compact, a significant increase in the heat resistance of unalloyed grey cast iron occurred.

Download Full-text

The influence of cryogenic processing on wear on the impact wear resistance of low carbon steel and lamellar graphite cast iron

Wear ◽

10.1016/j.wear.2011.01.041 ◽

2011 ◽

Vol 271 (9-10) ◽

pp. 1481-1489 ◽

Cited By ~ 14

Author(s):

T. Slatter ◽

R. Lewis ◽

A.H. Jones

Keyword(s):

Wear Resistance ◽

Cast Iron ◽

Carbon Steel ◽

Low Carbon Steel ◽

Impact Wear ◽

Low Carbon ◽

Graphite Cast Iron ◽

Lamellar Graphite ◽

Cryogenic Processing ◽

The Impact

Download Full-text

Investigation of Dendrite Coarsening in Complex Shaped Lamellar Graphite Iron Castings

Metals ◽

10.3390/met7070244 ◽

2017 ◽

Vol 7 (7) ◽

pp. 244 ◽

Cited By ~ 1

Author(s):

Péter Svidró ◽

Attila Diószegi ◽

Mohsen Pour ◽

Pär Jönsson

Keyword(s):

Iron Castings ◽

Lamellar Graphite

Download Full-text

Theoretic and Experimental Studies on the Casting of Large Die-Type Parts Made of Lamellar Graphite Grey Pig Irons by Using the Technology of Polystyrene Moulds Casting from Two Sprue Cups

Modelling and Simulation in Engineering ◽

10.1155/2012/362197 ◽

2012 ◽

Vol 2012 ◽

pp. 1-7

Author(s):

Constantin Marta ◽

Ioan Ruja ◽

Cinca Ionel Lupinca ◽

Monica Rosu

Keyword(s):

Heat Treatment ◽

Comparative Analysis ◽

Research Method ◽

Experimental Studies ◽

Casting Process ◽

Simulation Software ◽

Casting Defects ◽

Pig Iron ◽

Cast Part ◽

Lamellar Graphite

This paper presents a comparative analysis between the practical results of pig iron die-type part casting and the results reached by simulation. The insert was made of polystyrene, and the casting was downward vertical. As after the part casting and heat treatment cracks were observed in the part, it became necessary to locate and identify these fissures and to establish some measures for eliminating the casting defects and for locating them. The research method was the comparisons of defects identified through verifications, measurements, and metallographic analyses applied to the cast part with the results of some criteria specific to simulation after simulating the casting process. In order to verify the compatibility between reality and simulation, we then simulated the part casting respecting the real conditions in which it was cast. By visualising certain sections of the cast part during solidification, relevant details occur about the possible evolution of defects. The simulation software was AnyCasting, the measurements were done through nondestructive methods.

Download Full-text

On the Mechanics of Grey Cast Iron Under Pure Bending

Journal of Engineering Materials and Technology ◽

10.1115/1.3225851 ◽

1986 ◽

Vol 108 (2) ◽

pp. 141-146 ◽

Cited By ~ 7

Author(s):

G. S. A. Shawki ◽

S. A. R. Naga

Keyword(s):

Cast Iron ◽

Bending Strength ◽

Neutral Axis ◽

Grey Cast Iron ◽

Stress And Strain ◽

Pure Bending ◽

Rectangular Section ◽

Bending Strain ◽

Grey Cast ◽

Lamellar Graphite

This paper presents the results of experiments conducted on lamellar graphite grey cast iron of rectangular section subjected to pure bending. Strain measurements confirm the traditional speculation that plane sections remain plane under strain. Owing to the nonlinear relationship between stress and strain, however, the neutral axis of a loaded specimen is shown to shift away from the centroidal axis. This shift is evidently amplified with increased loading. A computer program is herein specially devised for calculating the shift in neutral axis through satisfaction of the conditions of equilibrium together with checking for possible crack initiation at the extension side. While the simple flexural formula holds very nearly true for the compression side, it fails, however, to predict stresses on the extension side, the situation being further aggravated by higher bending moments. The apparent high bending strength of grey cast iron is fully accounted for.

Download Full-text