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Evaluation of Foundry Properties of Brahmaputra River Sand and its Prospects

Rana Md. Shohel, Shahriar Md. Shams, Alam Md. Sha, Hossain Md. Imam Sohel, Biswas Pradip Kumar, Zaman Mohammad Nazin

Archives of Foundry Engineering

2023

Vol. 23, iss. 2

80--90

The river system of the Bengal delta encompasses a huge amount of fluvial sand; however, no comprehensive studies were available on using this river sand in foundry industries. Hence, the present research evaluates the foundry properties of trans-boundary Brahmaputra River sand and its prospects for use in foundries. Several laboratory analyses have been performed to elicit the foundry properties using standard methods of foundry analysis, including XRD, XRF, TG-DSC, and FESEM. From the study, the sand contains mainly quartz with small amounts of feldspar, amphibole, chlorite, and mica, and exhibits a subangular to subrounded shape. The sand is dominated by SiO2 (67.81-69.97%) and lesser amounts of other oxides, and it is thermally stable within 1000 °C temperature. The grain fineness number (64-79), mineralogical, chemical, thermal, and foundry properties are suitable for non-ferrous metal casting without distortion. Further, the aluminum and zinc alloy casting with trials demonstrate their potential for use in the foundry industries. The outcomes of this study thus offer valuable information about utilizing Brahmaputra River sand for foundry applications.

High-chromium cast iron with higher ductility

Murgaš M., Pokusová M.

Archiwum Odlewnictwa

2006

R. 6, nr 18/2

171--176

The cast iron with composition (in wt.%): C 2.6–2.8%, Cr 20–24%, Mo 0.7–1.5%, Ni 0.8-1.3%; 0.4-2% Mn, Si max. 1% with the trace amount of Ti and V was developed. Its foundry properties are very good and enable to cast the complex shaped castings with the section about 3 mm. The castings do not require the heat treatment, and in the range of wall section from 3 to 40 mm the as-cast material attains hardness from 47 to 53 HRC, ductility A5 of 1% minimally and is characterized by self-sharping effect.

Badano żeliwo o składzie chemicznym (wg. %): C 2.6–2.8%, Cr 20–24%, Mo 0.7–1.5%, Ni 0.8-1.3%; 0.4-2% Mn, Si max. 1% ze śladową ilością tytanu i wanadu. Jego właściwości odlewnicze są bardzo dobre i umożliwiają wykonanie odlewów o złożonych kształtach z przekrojem około 3 mm. Odlewy nie potrzebują obróbki cieplnej i w przedziale grubości ścianki od 3 do 40 mm materiał ma twardość od 47 do 53 HRC, plastyczność A5 min 1% jest charakterystyczna wynikom samoostrzenia.