발간논문

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Vol.27, No.5, 420 ~ 428, 1989
Title
The effects of the Cr Alloying elements and Solution treatment on the Microstructure and mechanical properties of the Rapidly Solidified high Manganese Steel Plate
김형수Hyung Soo Kim, 전병완Byung Woan Jean, 조성석Seong Seock Cho, 서동수Dong Soo Suhr, 홍종휘Jong Hwi Hong
Abstract
Using a twin-roller type melt-quenching technique, we investigated the effects of Cr alloying element on the microstructure and mechanical properties of rapidly to solidified high manganese steel strip(0.5㎜ thick). We confirmed the possibility of manufacturing a high Mn alloy steel plate without hot-rolling by this method. In melt-quenched, the transformation from austenite to ferrite was suppressed resulting in only austenite phase. Its solidification mode is similar to the typical structure of the rapidly solidified metals. The dendrite structure region without directionality increased with increasing Cr alloying element. The 0.2% yield stress of the alloy with Cr was higher than the standard high manganese steel. The strengthening effect of Cr after heat treatment cannot be explained by its small solution hardening effect alone and is rather considered to be mainly attributable to gram refining due to the rapid solidification and the addition of carbide forming element, Cr.
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