Microsegregation in Nodular Cast Iron with Carbides

Abstract In this paper results of microsegregation in the newly developed nodular cast iron with carbides are presented. To investigate the pearlitic and bainitic cast iron with carbides obtained by Inmold method were chosen. The distribution of linear elements on the eutectic cell radius was examined. To investigate the microsegregation pearlitic and bainitic cast iron with carbides obtained by Inmold method were chosen. The linear distribution of elements on the eutectic cell radius was examined. Testing of the chemical composition of cast iron metal matrix components, including carbides were carried out. The change of graphitizing and anti-graphitizing element concentrations within eutectic cell was determined. It was found, that in cast iron containing Mo carbides crystallizing after austenite + graphite eutectic are Si enriched.

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The Effect of Nodular Cast Iron Metal Matrix on the Wear Resistance

Archives of Foundry Engineering ◽

10.2478/v10266-012-0060-7 ◽

2012 ◽

Vol 12 (2) ◽

pp. 179-186 ◽

Cited By ~ 1

Author(s):

G. Gumienny

Keyword(s):

Wear Resistance ◽

Cast Iron ◽

Dry Friction ◽

Metal Matrix ◽

Adhesive Wear ◽

Nodular Cast Iron ◽

Lower Bainite ◽

Matrix Composition ◽

Iron Metal ◽

Bainitic Cast Iron

The Effect of Nodular Cast Iron Metal Matrix on the Wear Resistance The paper presents results of studies on the effect of the nodular cast iron metal matrix composition on the abrasive and adhesive wear resistance. Nodular cast iron with different metal matrix obtained in the rough state and ADI were tested. To research of abrasive and adhesive wear the pearlitic and bainitic cast iron with carbides and without this component were chosen. The influence of the carbides amount for cast iron wear resistance was examined. It was found, that the highest abrasive and adhesive wear resistance under conditions of dry friction has a nodular cast iron with carbides with upper and lower bainite. Carbides in bainitic and pearlitic cast iron significantly increase the wear resistance in these conditions. In terms of fluid friction the largest wear resistance had cast iron group with the highest hardness.

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Carbidic Bainitic and Ausferritic Ductile Cast Iron

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0125 ◽

2013 ◽

Vol 58 (4) ◽

pp. 1053-1058 ◽

Cited By ~ 5

Author(s):

G. Gumienny

Keyword(s):

Cast Iron ◽

Solid State ◽

Thermal Effects ◽

Metal Matrix ◽

Lower Bainite ◽

Ductile Cast Iron ◽

Iron Metal ◽

Derivative Analysis ◽

Upper Bainite ◽

Matrix Components

Abstract This article presents new kinds of carbidic ductile cast iron with different microstructures of the metal matrix. This cast iron was obtained using the Inmold method nodularisation which guarantees strong refining of graphite and the metal matrix components. A different microstructure of the metal matrix of the cast iron was obtained without any thermal treatment (unwrought) by a suitable composition of alloy additives. It was shown that by adding molybdenum, chromium, nickel and copper it is possible to obtain in the cast iron metal matrix consisting of upper bainite, its mixture with lower bainite or ausferrite in the casts with the wall thickness of 3/25 mm. The process of cast iron crystallization is presented and described with the help of the thermal and derivative analysis (TDA) curves. It also shows the thermal effects from transformation of austenite in solid state.

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