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Cite this article:
. . Acta Metall Sin, 2007, 43(10): 1113-1120 .
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Abstract Complex heat radiation transfer exists in the directional solidification process of multiple turbine blades of superalloy investment casting in vacuum Bridgman furnace. In order to control the quality of casting products, avoid the casting defects and increase the productivity at the same time, it is necessary to investigate the temperature distribution of multiple turbine blades during the directional solidification process. In this paper, a ray tracing model was developed based on Monte Carlo method and used to deal with the complex heat radiation transfer among the multiple turbine blades and the furnace wall during the withdrawal process dynamically. The withdrawal rate and furnace geometry were considered in this model, and the temperature distributions during directional solidification process at two different withdrawal rates were investigated. The simulated cooling curves of special sample positions were compared with the experimental ones and agreed well.
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Received: 12 February 2007
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