Table 4 Fixed parameters for stir casting

Stirring speed

500 rpm

Melting temperature

750 °C

Temp of melt during mixing

630 °C

Pouring temperature

680 °C

Wetting agent

Mg

Grain size of SiC particles

40–50 µm

Grain size of TiB₂

10–15 µm

SiC preheating temperature

200 °C

TiB₂ preheating temperature

200 °C

Position of stirrer in the melt

1/3 of melt height from bottom

Stirrer design

Four blade flat surface

Stirring time

10 min

Mould preheating temp

200 °C

Gas flow rate

2 lpm