MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Materials Processing
Erosion Resistance of Heat-Treated Aluminum Cast Iron to Aluminum Alloy Melt
Kazunori AsanoHiroshi YamadaSeiji Sugimura
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2024 Volume 65 Issue 5 Pages 534-540

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Abstract

Improvement in the erosion resistance of permanent molds to aluminum alloy melt is required. Since chemically and mechanically stable layer containing aluminum oxides can be formed on the cast irons by aluminum addition and heat treatment, the layer would improve the erosion resistance of the cast iron in the running melt. In this study, cast irons with different aluminum contents were fabricated, then they were heat-treated to form the oxide layer on the surface. The optimum heat treatment conditions to form the stable layer and the erosion behavior of the cast irons were clarified. Heat treatment in air was found to result in the formation of a layer that consists of the oxides, such as Fe2O3, Fe3O4 and Al2O3 on the cast irons. Based on the castability of the cast irons and morphology of the layer, it was concluded that the addition of 3% aluminum in the cast iron and heat treatment at 1173 K for 10 hours was the most suitable treatment. The heat treatment drastically improved the erosion resistance of the cast iron. The addition of magnesium to the melt temporarily decreased the time to erosion, but increased the time to erosion again when more than 0.75% magnesium.

 

This Paper was Originally Published in Japanese in J. JFS 94 (2022) 11–17. A typographical error is modified in Sec. 2.

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© 2024 Japan Foundry Engineering Society
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