The shrinkage and chilling tendency of spheroidal graphite (abbreviated SG) cast iron is much greater than that of the flake graphite cast iron in spite of its
V ol.55 N o.4 A pr.2006 1 PresentStatus and Prospectin D evelopm entof Sem i-Solid Rheo-D ie-Casting Technique ZHANG Lin, XING Shu- ming, LIU Wen, ZHANG Mi- lan