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首页> 外文期刊>Materials >Effects of Different Hot Working Techniques on Inclusions in GH4738 Superalloy Produced by VIM and VAR
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Effects of Different Hot Working Techniques on Inclusions in GH4738 Superalloy Produced by VIM and VAR

机译：不同热工作技术对Vim and VAR生产GH4738超合金中夹杂物的影响

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摘要

Hot working is a key process in the production of superalloys; however, it may result in the formation of inclusions that affect the superalloy performance. Therefore, the effects of hot working on inclusions in a superalloy must be studied. GH4738 superalloy was manufactured, herein, by vacuum induction melting and vacuum arc remelting. Hot working was performed by unidirectional drawing, upsetting and drawing, and upsetting/drawing with radial forging. The types and distributions of inclusions after these three hot working processes and those in an original ingot were analyzed using scanning electron microscopy, energy dispersive spectroscopy, and Image-Pro Plus software. The results showed that the melting technology essentially determined the inclusion types in GH4738. Four types of inclusions were found in the experiments: TiC–TiN–Mo–S composite, TiC–TiN composite, Ce–Mo–S composite, and SiC inclusions. In the case of hot working by unidirectional drawing, the average inclusion size first decreased, and then increased from the center to the edge. In the case of upsetting and drawing, and upsetting/drawing with radial forging, the average inclusion size decreased from the center to the edge.
机译：热工作是高温合金生产的关键过程;然而，它可能导致影响超合金性能的夹杂物。因此，必须研究热处理对超合金中的夹杂物的影响。 GH4738通过真空感应熔化和真空弧形重熔制造GH4738超合金。通过单向绘图，镦粗的镦粗，镦粗和绘图，镦粗锻造和镦粗/拉伸来进行热的工作。使用扫描电子显微镜，能量分散光谱和图像专业软件分析本三种热工作过程和原始锭中的夹杂物的类型和分布。结果表明，熔化技术基本上确定了GH4738中的包含类型。实验中发现了四种类型的夹杂物：TiC-TiN-MO-S复合材料，TiC-锡复合材料，CE-MO-S复合材料和SiC夹杂物。在通过单向拉伸的热工作的情况下，平均夹杂物尺寸首先降低，然后从中心增加到边缘。在镦粗和绘图的情况下，径向锻造的镦粗/拉伸，平均夹杂物尺寸从中心到边缘减小。

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