Effect of process variables on microstructure and segregation in centrifugal casting of C92200 alloy

Tin bronzes containing lead and zinc have a wide variety of applications such as valves, taps, gears, bushes and bearings. Due to having elements of high difference in density and low solubility, tin bronzes are difficult to cast. Segregation normally occurs in centrifugal casting of these alloys. In this research, effect of process variables including pouring temperature, mould rotation speed and mould cooling rate on microstructure and segregation of lead and tin have been investigated. The results show that raising pouring temperature causes grain size and DAS to increase and segregation to intensify. Also, increasing mould rotation speed leads to high segregation and raising the grain size and DAS. Finally, increasing mould cooling rate, diminishes segregation of and reduces grain size and DAS. Materials used: C92200 alloy.