Abstract
In this paper, the experimental model for a self-designed open-close water-cooled mould was utilized to measure the temperature curves of various points inside the casting and mould under different mould pressure. The Interface heat transfer coefficient(IHTC) of the casting/water-cooled mould interface was calculated by using the Beck nonlinear estimation back-calculation method, and on this basis, the rule of how pressure affects heat transfer coefficient was obtained. Then the coefficient can be defined as the boundary condition(BC) to simulate the solidification process of the experimental casting. The results showed that the simulation outcome considering the influence of pressure was completely different from those of general water-cooled moulds, which can be proved by the about 35% solidification time decrease, visibly reduced shrinkage porosity area in the casting and more accurate simulation results. The anatomical results of the experimental casting also confirmed this.
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