真空非自耗电弧熔炼温度场模拟及熔炼效果评估

杨莉莉; 黄燕; 李小溅; 郑立静; 张虎

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真空非自耗电弧熔炼温度场模拟及熔炼效果评估
Simulation of Temperature Field in Vacuum Non-consumed Melting and Evaluation of Melting Effect
2009年29卷第6期页码：498-501
纸质出版日期： 2009 ，
DOI：

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[1]杨莉莉,黄燕,李小溅,郑立静,张虎.真空非自耗电弧熔炼温度场模拟及熔炼效果评估[J].特种铸造及有色合金,2009,29(06):498-501+483.

Yang Lili, Huang Yan, Li Xiaojian, et al. Simulation of Temperature Field in Vacuum Non-consumed Melting and Evaluation of Melting Effect[J]. Special Casting & Nonferrous Alloys, 2009,29(6):498-501.
[1]杨莉莉,黄燕,李小溅,郑立静,张虎.真空非自耗电弧熔炼温度场模拟及熔炼效果评估[J].特种铸造及有色合金,2009,29(06):498-501+483. DOI：

Yang Lili, Huang Yan, Li Xiaojian, et al. Simulation of Temperature Field in Vacuum Non-consumed Melting and Evaluation of Melting Effect[J]. Special Casting & Nonferrous Alloys, 2009,29(6):498-501. DOI：

摘要

采用ANSYS软件模拟真空非自耗电弧炉熔炼TiAl基和NbSi基合金的熔炼过程

通过模拟得到熔炼过程中的温度场数据

同时计算合金锭不同位置的冷却曲线以及相应的冷却速度曲线。并结合实际熔炼的Ti-47Al-2Cr-2Nb及Nb-16Si-22Ti-2Al-2Cr-2Hf合金锭

分析不同冷却速度节点处的微观组织均匀性。结果表明

冷却速度不同

导致合金锭微观组织不均匀

说明真空非自耗电弧熔炼方法虽简单易行

但其组织不均匀性影响了较大尺寸高温合金铸件的品质。

Abstract

Melting process of TiAl and NbSi intermetallic alloys in vacuum non-comsumed arc furnace was simulated by the ANSYS software.Through temperature field obtained from melting process

cooling curves and corresponding cooling rate at different positions of the alloy ingot were mapped out.Compared with different cooling rates in simulation

the uniformity of microstructure in relevant positions of actual cast Ti-47Al-2Cr-2Nb and Nb-16Si-22Ti-2Al-2Cr-3Hf alloys was analyzed.The results reveal that the different cooling rates in cast alloys can result in the microstructural heterogeneity

greatly affecting the quality of alloy castings with large dimension

although vacuum non-consumed melting technology is convenient for superalloy.