| 等离子旋转电极雾化熔滴凝固过程的数值计算 |
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| 引用本文： | 陈焕铭,胡本芙,李慧英.等离子旋转电极雾化熔滴凝固过程的数值计算[J].兵器材料科学与工程,2005,28(1):21-24. |
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| 作者姓名： | 陈焕铭 胡本芙 李慧英 |
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| 作者单位： | 1. 宁夏大学,物理与电气信息工程学院,宁夏,银川,750021
2. 北京科技大学,材料科学与工程学院,北京,100083 |
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| 摘 要： | 在Newton冷却模型的基础上,用数值求解方法计算了FGH95高温合金在等离子旋转电极雾化(PREP)过程中雾化熔滴的温度、固相分数、冷却速率等凝固参量随工艺参数的变化规律。结果表明:合金过热度对凝固参量的影响主要在全液态阶段,电极棒转速大小对熔滴凝固过程有一定影响,而雾化熔滴的冷却速率及固相分数等对氩氦气体的混合比例极为敏感。
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| 关 键 词： | 等离子旋转电极雾化 工艺参数 FGH95合金 数值计算 |
| 文章编号： | 1004-244X(2005)01-0021-04 |
| 修稿时间： | 2004年7月5日 |
Numerical analysis of droplet solidification process during PREP |
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| CHEN Huan-ming,HU Ben-fa,LI Hui-ying.Numerical analysis of droplet solidification process during PREP[J].Ordnance Material Science and Engineering,2005,28(1):21-24. |
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| Authors: | CHEN Huan-ming HU Ben-fa LI Hui-ying |
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| Abstract: | Based on Newtonian heat transfer formulation coupled with the classical heterogeneous nucleation, this paper investigated the influences of processing parameters on FGH95 superalloy droplet temperature, cooling rate and solid fraction during the solidification of plasma rotating electrode processing (PREP) atomization by numerical analysis method. The results suggested that the effect of degree of superheat on the droplet solidification process mainly takes place in the fully liquid stage. Furthermore, the rotating rate of eletrode has certain effect on the solidification process. Cooling rate and solid fraction of atomized droplet is sensitive to the proportion of mixed cooling gas. |
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| Keywords: | plasma rotating electrode process atomization processing parameter FGH95 alloy numerical analysis |
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