Effect of electron beam melt superheating treatment on DZ125 alloy

Yi Li; Yi Tan; Dinggang Wang; Xiaogang You; Ziang Chen; Rusheng Bai; Jianbing Qiang

Journal of Materials Research and Technology (May 2023)

Effect of electron beam melt superheating treatment on DZ125 alloy

Yi Li,
Yi Tan,
Dinggang Wang,
Xiaogang You,
Ziang Chen,
Rusheng Bai,
Jianbing Qiang

Affiliations

Yi Li: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian 116024, China; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
Yi Tan: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian 116024, China; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China; Corresponding author.
Dinggang Wang: Beijing Institute of Aeronautical Materials, Beijing 100095, China
Xiaogang You: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian 116024, China; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China; Beijing Institute of Aeronautical Materials, Beijing 100095, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, Science Road 100, Zhengzhou, Henan, 450001, P. R. China
Ziang Chen: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian 116024, China; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
Rusheng Bai: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China; Key Laboratory for Energy Beam Metallurgy and Advanced Materials Preparation of Liaoning Province, Dalian 116024, China; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
Jianbing Qiang: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China; Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China

Journal volume & issue: Vol. 24
pp. 6088 – 6106

Abstract

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Electron beam melt superheating treatment (EBMST) is firstly proposed to prepare DZ125 alloy, which opens up a new way to further explore and improve the properties of superalloys. The effects of melt superheating treatment at ultra-high temperature on the composition, microstructure and purity of superalloy were studied. As the melt superheating power increases, the mass loss rate of the alloy increases gradually. A theoretical model for controlling alloy composition was established. The secondary dendrite spacing, the area fraction of the eutectic structure and the size of γ′ phases decrease first and then increase with the increase of the melt superheating power. The sizes of γ′ phases at dendritic core and interdendritic regions have the minimum values of 0.12 μm and 0.16 μm, respectively. As the melt superheating power increases, the segregation coefficients of Co and W increase first and then decrease, while that of Ti and Mo decrease first and then increase. The best purification effect is achieved at 14 kW, where the content of O and N are 1.8 ppmw and 1.2 ppmw, respectively. It means that 78% O and 80% N are removed from the raw materials.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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