METHOD FOR ANALYZING SOLIDIFIED BEHAVIOR OF MOLTEN ALLOY IN MOLD

摘要

PROBLEM TO BE SOLVED: To analyze the solidifying state at high accuracy by using an approximating expression of latent heat output quantity used at the time of executing the analysis of the solidifying state of molten alloy in an mold with expressions obtd. from the relation of the temp. and the latent heat output quantity obtd. by thermal-analyzing the actual molten metal or an expression integrating these expressions related to the temp. ;SOLUTION: The approximating expression of the latent heat output quantity (q) used at the time of analyzing the solidified behavior of the molten alloy in the mold 20, is made to the following expression. In the range of T_sx≥TL-ΔT≥T_fx, q=a_x.exp(b_x.dT). Wherein, T_sx is the starting temp. of rapid generation of heat, TL is the starting temp. of solidification, ΔT is lowered temp. from the starting temp. of the solidification, T_fx is the completing temp. of rapid generation of heat, a_x and b_x are the constants obtd. with the thermal analysis, a_x0, b_x0 and dT is the lowered temp. defree from T_sx. In the range of T_fx-1≥TL-ΔT≥T_sx, q=c_x.dT+d_x wherein, c_x and d_x are the constants obtd. with the thermal analysis and dT is the lowered temp. degree from T_fx-1.;COPYRIGHT: (C)1998,JPO