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.

Continuous Cooling Transformation (CCT) Diagrams Of Carbidic Nodular Cast Iron

“…The presence of about 1.9% Mo did not have any influence on the decrease in temperature of the beginning of the martensitic transformation because the majority of its atoms form part of the carbides. It is for this reason that its concentration in the austenite is low [12].…”

Hypoeutectic Silumin to Pressure Die Casting with Vanadium and Tungsten

“…They are probably intermetallic phases containing V and W which crystallize during peritectic transformations. The identification of phases in Al-si alloys containing Cr, V, W, and mo is presented inter alia in [7,13,15,26]. Their size is relatively small compared with other elements of the microstructure and usually did not exceed 50 µm.…”

“…Among the alloying elements, the elements with a high melting point such as chromium, molybdenum, vanadium and tungsten can be distinguished. Research on aluminum alloys with these additives are described in papers [10][11][12][13][14][15][16][17][18][19]. According to the data contained in these papers, aforementioned elements are characterized by the lack of solubility in aluminum in the solid state.…”

Hypoeutectic Al-Si Alloy Doped with Chromium, Tungsten and Molybdenum Designated for Pressure Die Casting

“…In 2014 over 16 million tons of aluminum castings were produced, which accounted for approximately 15.5% of worldwide castings production. In comparison to the previous year, the production increased by about 1 million tons [1,2].…”

“…Fe 2 W, Cr 3 Si) with the constituent elements. According to the data presented in papers [10][11][12][13][14][15][16], aforementioned elements are characterized by the lack of solubility in aluminum in the solid state. Therefore, their simultaneous addition can cause a fragility of Al-Si alloys.…”