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采用正交設(shè)計(jì)優(yōu)化單晶合金定向凝固數(shù)值模擬參數(shù)
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Study of Heat Transfer Coefficient Used in the Unidirec- tional Solidification Simulation Based on Orthogonal Design
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National Natural Science Foundation of China (10477010); Beijing Institute of Aeronautical Materials Foundation (KF40070122)

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    摘要:

    采用正交設(shè)計(jì)方法研究單晶高溫合金定向凝固過(guò)程數(shù)值模擬所需參數(shù)對(duì)溫度場(chǎng)和冷卻曲線的影響。結(jié)果表明：?jiǎn)尉Ц邷睾辖鹉糖€對(duì)模擬參數(shù)十分敏感，特別敏感于鑄件與鑄型之間的界面換熱系數(shù)。通過(guò)正交設(shè)計(jì)獲得邊界條件參數(shù)使模擬結(jié)果與試驗(yàn)結(jié)果吻合良好。確定符合DD6單晶高溫合金凝固過(guò)程的數(shù)值模擬邊界條件。

    Abstract:

    Orthogonal design was applied to analyze the effect of simulation parameters on the thermal field and cooling curve during directional solidification using commercial finite-element analysis software ProCAST. The results show that solidification curves of single crystal superalloy vary greatly with several numerical simulation parameters and are particularly sensitive to the values of the heat transfer coefficient between the mold and test slab casting without core. The predictions of the temperature filed during solidification for slab geometries were compared with experimental results and calculated cooling curves are in good agreement with experimental measurements. The simulation parameters that had the greatest influence on high rate solidification (HRS) casting process simulation results were modified and determined.

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金海鵬,李嘉榮,于 靜,劉世忠.采用正交設(shè)計(jì)優(yōu)化單晶合金定向凝固數(shù)值模擬參數(shù)[J].稀有金屬材料與工程,2010,39(5):767~770.[Jin Haipeng, Li Jiarong, Yu Jing, Liu Shizhong. Study of Heat Transfer Coefficient Used in the Unidirec- tional Solidification Simulation Based on Orthogonal Design[J]. Rare Metal Materials and Engineering,2010,39(5):767~770.]
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  • 收稿日期:2009-05-08
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