Effects of Different Melting Technologies on the Purity of Superalloy GH4738.
Effects of Different Melting Technologies on the Purity of Superalloy GH4738.
复制标题
不同熔炼工艺对GH4738高温合金纯度的影响
DOI：
10.3390/ma11101838
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发表时间：
2018-09-27
期刊：
影响因子：
--
通讯作者：
Gu Y
中科院分区：
文献类型：
--
作者：
Chen Z;Yang S;Qu J;Li J;Dong A;Gu Y
熔炼技术的选择对于控制高温合金的纯度是至关重要的，这是特别重要的，因为纯度已经限制了高温合金领域的进步。在这项研究中，两次和三次熔炼技术被用来细化GH4738高温合金。采用元素分析、电感耦合等离子体-原子发射光谱、X射线衍射分析、扫描电镜能谱、高温杯突试验机、高温疲劳试验机、Image-Pro Plus软件等分析手段，以及使用两种熔化技术形成白色斑点的概率。系统地研究了不同熔炼工艺对高温合金纯净度的影响。在控制杂质的存在方面，三次熔化工艺导致高温合金中有害的N、S和O杂质的水平较低，三次熔化的高温合金还包含比双次熔化的合金更少类型的更小尺寸和更少量的夹杂物。三次熔化还提高了抗拉强度和疲劳寿命，并最大限度地减少了高温合金中形成缺陷的可能性。
The choice of melting technique is crucial for controlling the purity of a superalloy, which is especially important because purity has come to limit progress in the superalloy field. In this study, double- and triple-melting techniques were used to refine the GH4738 superalloy. Elemental analyses, inductively coupled plasma-atomic emission spectroscopy, X-ray diffraction analysis, scanning electron microscopy with energy-dispersive spectroscopy, high-temperature cupping machine, high-temperature fatigue testing machine, and Image-Pro Plus software were used to analyze and compare the contents of specific elements, the types and sizes of inclusions, the mechanical properties, and the probabilities of white spot formation using the two melting techniques. The effects of the different melting processes on the purity of the superalloy were systematically studied. In terms of controlling the presence of impurities, the triple-melting process resulted in lower levels of harmful N, S, and O impurities in the superalloy, the triple-melted superalloy also contained fewer types of inclusion of smaller sizes and in smaller amounts than the double-melted alloy. Triple melting also promotes tensile strength and fatigue life, and minimizes the probability of forming defects in the superalloy.
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发表时间：
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影响因子：
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