Rheoforging of Steel
Rheoforging is a modification of semi-solid forging starting directly from the liquid phase instead of reheating of a billet. In this process semi-solid slurry is prepared by pouring slightly overheated melt over a slope into a holding cup to induce homogenous nucleation. By controlling the casting temperature and holding time in the cup the desired semi-solid slurry with fine, globular microstructure is successfully created. The inline forging trials using this slurry show the principal feasibility of the process.
C.G. Kang, S.K. Kim and S.Y. Lee
F. Knauf et al., "Rheoforging of Steel", Solid State Phenomena, Vols. 116-117, pp. 464-467, 2006