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- W2038193079 abstract "Due to the low wear resistance of as cast ductile iron (DI), it seemed logical to apply a recently developed two step austempering heat treatment. This process is known to enhance the mechanical properties as well as the wear properties of ductile irons. In this study two DI alloys were used, the first one was unalloyed DI and the second contained 0·2%Cr. The first batch was treated by a conventional (single step) austempering treatment, where the samples were austenitised at 900°C for 1 h and then quenched in a salt bath at an austempering temperature of 360°C for 1 h. The second batch of samples was subjected to a two step austempering process (900°C for 1 hour, quenched to 360°C, but the temperature of the salt bath was raised to 389°C over a period of 1 h and finally cooled by forced air). The microstructure, mechanical properties and abrasion resistance have been studied for both single step (conventional) and two step ADIs. The two step ADI achieved superior abrasion resistance which was attributed to the large amount of transformed fine ausferrite in the final structure and existing of higher amounts of retained austenite that transformed mechanically into martensite during the wear test. The wear mechanisms were also defined by studying the worn surfaces using a scanning electron microscope." @default.
- W2038193079 created "2016-06-24" @default.
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- W2038193079 date "2006-09-01" @default.
- W2038193079 modified "2023-09-27" @default.
- W2038193079 title "Enhancement of abrasion resistance of ductile cast iron by applying a two step austempering treatment" @default.
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- W2038193079 doi "https://doi.org/10.1179/136404606225023489" @default.
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