Austenite grain growth in steel ShKh15 melted by different procedures

1. Austenite grain growth in steel ShKh15 occurs with formation of separate large grains by merging of groups of fine grains at 1000–1050° and even growth of all grains with straighter boundaries at 1100° and higher. 2. Compared with structural steels, steel ShKh15 is characterized by finer grains and higher temperatures at which grain growth begins. 3. After remelting, the austenite grain growth is similar, although the tendency to grain growth mereases at 1200–1250° in ESR and EBR heats.