热等静压温度对雾化合金粉制备的9Cr-ODS钢组织和性能的影响

doi:10.11896/cldb.19090133

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Abstract In this paper 9Cr-ODS steels produced by atomization alloy powders were studied. The milling technology of atomization alloy powders were studied firstly by laser particle size analyzer, XRD, SEM, EDS and so on. The EBSD, TEM, HAADF and SAXS were applied to study the effect of hot isostatic pressing temperatures on the microstructure and mechanical properties of 9Cr-ODS steels. The experiment data show that the alloy powder can meet the requirements of preparing ODS steels after 8 h ball milling. The grain sizes of atomization alloy powders 9Cr-ODS steels hot isostatic pressing at 900 ℃, 1 100 ℃ and 1 200 ℃ are 0.36 μm, 0.94 μm and 1.66 μm, respectively. The small angle X-ray scattering results show that the distribution densities of Y, Ti, O enrich nano-precipitates in the 9Cr-ODS steels produced by atomization alloy powders are 3.94×10²²/m³, 1.03×10²²/m³ and 8.66×10²¹/m³. The distribution densities of Al, Ti, Cr oxides decrease as hot isostatic pressing temperatures rise. The Y, Ti, O enrich nano-precipitates are found in the 9Cr-ODS steels produced by atomization alloy powders. As the hot isostatic pressing temperatures rise, the distribution densities Y, Ti, O enrich nano-precipitates decreased. The sample of 9Cr-ODS steel hot isostatic pressing at 900 ℃ display excellent mechanical properties. The mechanical properties decrease as hot isostatic pressing temperature rise.

Key words： atomization alloy powder oxide dispersion strengthen ball milling HIP temperatures

Published: 10 May 2021

CLC number:

TB31

Fund:National Natural Science Foundation Youth Fund of China (51601031) and Liaoning Province Natural Science Foundation (2017540306).

About author:: Rui Xie received his B.E. degree in materials enginee-ring from the Shenyang Jianzhu University of China and Ph.D. degree in materials science from the Northeastern University of China in Sep. 2010—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 lectu-rer. 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 Province.

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Cite this article:

XIE Rui,LYU Zheng,XU Changwei, et al. The Effects of Hot Isostatic Pressing Temperature on Microstructures and Properties of 9Cr-ODS Steels Produced by Atomization Alloy Powder[J]. Materials Reports, 2021, 35(8): 8169-8178.

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http://www.mater-rep.com/EN/10.11896/cldb.19090133 OR http://www.mater-rep.com/EN/Y2021/V35/I8/8169

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