Influence of the Pressure of Open-Close Water-Cooled Moulds on Casting/Mould Interface Heat Transfer and Casting Solidification Process

2018 6th International Conference on Mechanical Engineering, Materials Science and Civil Engineering

材料科学;机械制造;土木建筑工程

Yao, Q.H.^1 ; Zeng, Y.D.^1 ; He, L.T.^1 ; Zhang, J.^1

College of Materials Science and Engineering, Inner Mongolia University of Technology, Huhehaote

010051, China^1

关键词: Casting solidification process;    Experimental modeling;    Interface heat transfer coefficient;    Non-linear estimation;    Shrinkage porosity;    Solidification process;    Solidification time;    Temperature curves;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/542/1/012068/pdf
DOI  :  10.1088/1757-899X/542/1/012068

来源: IOP

【 摘 要 】

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.