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FeAlOY氧化物弥散强化铁素体合金的高温抗蠕变性

High-Temperature Creep Resistance of FeAlOY ODS Ferritic Alloy.

作者信息

Dymáček Petr, Jarý Milan, Bártková Denisa, Luptáková Natália, Gamanov Štepán, Bořil Petr, Georgiev Vjaceslav, Svoboda Jiří

机构信息

Institute of Physics of Materials CAS, Žižkova 22, 616 00 Brno, Czech Republic.

Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, 616 00 Brno, Czech Republic.

出版信息

Materials (Basel). 2024 Oct 11;17(20):4984. doi: 10.3390/ma17204984.

DOI:10.3390/ma17204984
PMID:39459689
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11509301/
Abstract

A significant effort in optimizing the chemical composition and powder metallurgical processing led to preparing new-generation ferritic coarse-grained ODS alloys with a high nano-oxide content. The optimization was aimed at high-temperature creep and oxidation resistance at temperatures in the range of 1100-1300 °C. An FeAlOY alloy, with the chemical composition Fe-10Al-4Cr-4YO (wt. %), seems as the most promising one. The consolidation of the alloy is preferably conducted by hot rolling in several steps, followed by static recrystallization for 1 h at 1200 °C, which provides a stable coarse-grain microstructure with homogeneous dispersion of nano-oxides. This represents the most cost-effective way of production. Another method of consolidation tested was hot rotary swaging, which also gave promising results. The compression creep testing of the alloy at 1100, 1200, and 1300 °C shows excellent creep performance, which is confirmed by the tensile creep tests at 1100 °C as well. The potential in such a temperature range is the target for possible applications of the FeAlOY for the pull rods of high-temperature testing machines, gas turbine blades, or furnace fan vanes. The key effort now focuses on expanding the production from laboratory samples to larger industrial pieces.

摘要

在优化化学成分和粉末冶金工艺方面付出了巨大努力，从而制备出具有高纳米氧化物含量的新一代铁素体粗晶氧化物弥散强化（ODS）合金。这种优化旨在提高合金在1100 - 1300°C温度范围内的高温蠕变性能和抗氧化性能。一种化学成分（质量分数）为Fe - 10Al - 4Cr - 4YO的FeAlOY合金似乎是最具潜力的。该合金的固结优选通过多步热轧进行，随后在1200°C下进行1小时的静态再结晶，这能提供具有纳米氧化物均匀弥散分布的稳定粗晶微观结构。这是最具成本效益的生产方式。另一种测试的固结方法是热旋转锻造，也取得了不错的效果。该合金在1100°C、1200°C和1300°C下的压缩蠕变测试显示出优异的蠕变性能，1100°C下的拉伸蠕变测试也证实了这一点。在这样的温度范围内的潜力使其有望应用于高温试验机的拉杆、燃气轮机叶片或炉扇叶片。目前的关键努力集中在将生产从实验室样品扩大到更大尺寸的工业部件。

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7
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