热等静压温度对14Cr-ODS钢显微组织及力学性能的影响

doi:10.11896/cldb.19020151

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Abstract The milling technology of oxides dispersion strengthened steels alloy powders were studied firstly by laser particle size analyzer, X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and so on. The electron backscattered diffraction, transmission electron microscope, high-angle annular dark field image, and small-angle X-ray scattering were applied to study the effect of hot isostatic pressing temperatures on the microstructure and mechanical properties of 14Cr-ODS steels. The experiment data show that the alloy powder can meet the requirements of preparing ODS steels after 50 h ball milling. The grain sizes of 14Cr-ODS steels hot isostatic pressing at 900 ℃ and 1 200 ℃ are 0.4 μm and 1.2 μm, respectively. Y-Ti-O-rich nanoclusters, Y₂Ti₂O₇ and large-sized Cr-Ti-O-rich phases are found in 14Cr-ODS steels hot isostatic pressing at 900 ℃ and 1 200 ℃. The distribution density of Y-Ti-O-rich nanoclusters in 14Cr-ODS steels hot isostatic pressing at 900 ℃ is 4.96×10²⁴ /m³. As the hot isostatic pressing temperature rising, the size of Y-Ti-O-rich nanoclusters growing while distribution density decreasing. The Vickers hardness of 14Cr-ODS steels HIP at 900 ℃ is slightly higher, and the tensile strength is higher at test temperatures.

Key words： oxide dispersion strengthen alloy powder ball milling hot isostatic pressing temperatures microstructure Y-Ti-O-rich nanoclusters

Published: 25 April 2020

CLC number:

TB31

Fund:This work was financially supported by the Natural Science Foundation Young Scientist Foundation of China (51601031).

About author:: Rui Xiereceived his B.E. degree in materials engineering from the Shenyang Jianzhu University of China and Ph.D. degree in materials science from the Northeastern University of China in Jul. 2015. He worked at metallurgy engineering Post-Doctoral research station since Oct. 2015 to Mar. 2018. He worked at Shenyang Jianzhu University from Jul. 2018 as a lecturer. He has published more than 15 journal papers and two national patent authorizations. His research interests focus on the advanced metals with national research priority, and the nuclear reactor plant structure metals materials. In addition, his reach area acquired support of Natural Science Foundation Young Scientist Foundation of China, subtopics of national key R&D projects and science foundation of Liaoning pro-vince.

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	XIE Rui
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Cite this article:

XIE Rui,LYU Zheng,LU Chenyang, et al. Effect of Hot Isostatic Pressing Temperature on Microstructure and Mechanical Properties of 14Cr-ODS Steel[J]. Materials Reports, 2020, 34(8): 8141-8148.

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http://www.mater-rep.com/EN/10.11896/cldb.19020151 OR http://www.mater-rep.com/EN/Y2020/V34/I8/8141

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