Computer Model for Calculating Temperature Gradients and Thermal Stresses in a Die Casting System.
Weaver CP; Sanders SD
Trans 9th Sdce-77 Int'l Die Casting Expo & Cong Milwaukee 9(G-t77-064):5 pages
A research program in progress at the Tuscaloosa (Alabama) Metallurgy Research Center of the Bureau of Mines is designed to allow evaluation of the potential of various ceramics as die inserts in ferrous die casting. To determine the possible performance of different ceramic materials without having to make large expenditures for full-scale casting experiments, a computer model was developed that predicts the temperature gradient and thermal stress patterns within a ferrous die casting system during the casting operation. The model uses an explicit finite difference technique to numerically approximate the solution of the differential equations that describe heat-transfer. The model will estimate the temperature gradient through the casting, the ceramic insert, and the die body. It also will predict thermal stresses through the ceramic insert. The model is useful for analyzing the effects of the heat of fusion emitted during solidification, analyzing the effects of film coefficients that affect heat transfer, and evaluating the effects of metal flow on the thermal conditions in a die system.
Trans. 9th Sdce-77 Int'l Die Casting Expo. & Cong., Milwaukee, V. 9, Paper No. G-t77-064, Pp1-5