On the Microstructure of XW-42 Steel after Direct Partial Remelting
In order to be considered as a material for semi-solid processing, an alloy has to possess solid spheroids within liquid matrix. Therefore, it is important to investigate the structure of the candidate alloy prior to forming process by conducting partial melting experiment. In this research, the partial melting was conducted for XW-42 steel directly from as annealed condition without any pre-treatment (Direct Partial Remelting). Liquid Fraction Profile obtained from Differential Thermal Analysis (DTA) showed that temperature of 1340°C was located in a low temperature sensitivity region, hence making it as a candidate for processing temperature. Direct Partial Remelting at this temperature for 0, 2 and 5 minutes revealed near spheroidal structure with average grain size between between 45-51 µm which can be considered suitable for semi-solid processing.
Zhengyi Jiang, Xianghua Liu and Jinglong Bu
A. Alfan et al., "On the Microstructure of XW-42 Steel after Direct Partial Remelting", Advanced Materials Research, Vols. 154-155, pp. 1280-1283, 2011