scholarly journals EBSD Analysis of the Primary Austenite Grains in Lamellar Graphite Cast Iron

2019 ◽  
Vol 8 (3) ◽  
pp. 386-392 ◽  
Author(s):  
Marcos G. López ◽  
Luke N. Brewer ◽  
Juan M. Massone ◽  
Roberto E. Boeri
Keyword(s):  
Cast Iron ◽  
Ebsd Analysis ◽  
Primary Austenite ◽  
Graphite Cast Iron ◽  
Austenite Grains ◽  
Lamellar Graphite

Examination of the Size and Morphology of Austenite Grains in Lamellar Graphite Cast Iron

2019 ◽  
Vol 14 (3) ◽  
pp. 689-695 ◽  
Author(s):  
Marcos G. López ◽  
Juan M. Massone ◽  
Roberto E. Boeri
Keyword(s):  
Cast Iron ◽  
Graphite Cast Iron ◽  
Austenite Grains ◽  
Lamellar Graphite ◽  
Size And Morphology

Theory of Graphite Nucleation in Lamellar Graphite Cast Iron

2009 ◽  
Vol 3 (4) ◽  
pp. 39-47 ◽  
Author(s):  
A. Sommerfeld ◽  
B. Tonn
Keyword(s):  
Cast Iron ◽  
Graphite Cast Iron ◽  
Lamellar Graphite

scholarly journals On the Primary Solidification of Compacted Graphite Iron: Microstructure Evolution during Isothermal Coarsening

2018 ◽  
Vol 925 ◽  
pp. 90-97 ◽  
Author(s):  
Juan Carlos Hernando ◽  
Attila Diószegi
Keyword(s):  
Cast Iron ◽  
Morphological Evolution ◽  
Solidification Process ◽  
Primary Phase ◽  
Eutectic Solidification ◽  
Spheroidal Graphite ◽  
Cube Root ◽  
Compacted Graphite ◽  
Primary Austenite ◽  
Graphite Cast Iron

It is widely accepted that in most commercial hypoeutectic alloys, both static mechanical properties and feeding characteristics during solidification, are extremely linked to the coarseness of the primary phase. It is therefore of critical importance to provide tools to control and predict the coarsening process of the dendritic phase present in hypoeutectic melts. The characterization of the primary phase, a product of the primary solidification, has traditionally been neglected when compared to the eutectic solidification characterization in cast iron investigations. This work presents the morphological evolution of the primary austenite present in a hypoeutectic compacted graphite cast iron (CGI) under isothermal conditions. To that purpose, a base spheroidal graphite cast iron (SGI) material with high Mg content is re-melted in a controlled atmosphere and reversed into a CGI melt by controlling the Mg fading. An experimental isothermal profile is applied to the solidification process of the experimental alloy to promote an isothermal coarsening process of the primary austenite dendrite network during solid and liquid coexistence. Through interrupted solidification experiments, the primary austenite is preserved and observed at room temperature. By application of stereological relations, the primary phase and its isothermal coarsening process are characterized as a function of the coarsening time applied. The microstructural evolution observed in the primary austenite in CGI and the measured morphological parameters show a similar trend to that observed for lamellar graphite cast iron (LGI) in previous investigations. The modulus of the primary austenite, Mγ, and the nearest distance between the centre of gravity of neighbouring austenite particles, Dγ, followed a linear relation with the cube root of coarsening time.

Active brazed ceramic cemented carbide compound drills for machining lamellar graphite cast iron

2014 ◽  
Vol 8 (3) ◽  
pp. 365-372 ◽  
Author(s):  
D. Biermann ◽  
M. Kirschner ◽  
H. J. Maier ◽  
F.- W. Bach ◽  
K. Möhwald ◽  
...  
Keyword(s):  
Cast Iron ◽  
Cemented Carbide ◽  
Graphite Cast Iron ◽  
Lamellar Graphite

Researches Regarding the Influence of Alloying Elements on the Mechanical Properties of Lamellar Graphite Cast Iron

2018 ◽  
Vol 16 (15) ◽  
pp. 11-16
Author(s):  
Elena Valentina Stoian ◽  
Vasile Bratu ◽  
Cristiana Maria Enescu ◽  
Dan Nicolae Ungureanu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cast Iron ◽  
Manganese Content ◽  
Alloying Elements ◽  
Silicon Iron ◽  
Graphite Cast Iron ◽  
Hardness Increase ◽  
Lamellar Graphite ◽  
Cylinder Liners

Abstract Aim of the study is to present the technological process of obtaining cast iron with lamellar graphite for use in the manufacture of cylinder liners, and to identify the main alloying elements and track their influence on the mechanical properties of cast iron with lamellar graphite. Also paper presents analysis of 20 batches of cast iron with lamellar graphite, which are made of cylinder liners, in terms of chemical composition and the mechanical properties. After the analysis of the 20 castings of cast iron Fc 250 it is observed that: the increase in the carbon content shows a decrease of the tensile strength and hardness of the gray cast iron; the increase in silicon content shows a decrease in hardness and tensile strength. Decreasing the amount of graphite and especially the alloy of silicon iron lead to hardness increase 1% Si increases hardness by 50 HB). A statistical analysis has been performed on the data obtained that accounts for changes in alloying additions. A modeling and optimization of mechanical properties (tensile strength and hardness) was performed according to the percentages of carbon, silicon and manganese. Mathematical modeling found that the hardness and traction resistance of the cast iron decreased with the increase in carbon, silicon and manganese content.

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