This paper reports investigations made on the annealing heat treatment effects on steel welds. The properties of the weld investigated were hardness value and toughness. Micro examination of the samples was also done with optical microscopy. Four (4) different grades of steel rods (10mm) in diameter were obtained. The range of the carbon contents of the steel rods was from 0.16 wt pct C to 0.33 wt pct C. From each grade of the steel materials, grooved specimen of about 150mm were prepared. The groves were then filled to create welds using arc welding. The resulting welds were then subjected to annealing heat treatment. The hardness values and toughness of the welds were determined. The microstructural analyses of the welds were carried out as well. The results show that hardness and toughness were dependent on the carbon content. There was also significant microstructural modification due to heat treatment.
This paper presents the report of a research on the adaptation of green moulding sand. This was done by addition of iron filings and snail shell to standard silica sand. The objective is to evaluate the compatibility of iron filings and snail shell with green moulding sand in order to know their usability with green moulding sand. Twenty-five sand samples were prepared with different Fe and snail shell contents ranging from 1 wt% to 5 wt%. A control sand sample which had no iron and snail shell content was also prepared. The properties of the sand samples were tested. The results show that addition of Fe filing does not have any adverse effects on the properties of green moulding sand; however, the snail shell content show some effects on some of the properties of the moulding sand.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.