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Article

Preparation of High-Nitrogen Ductile Iron by Injecting Nitrogen Gas in Molten Iron

Key Laboratory of Solidification Control and Digital Preparation Technology, School of Material Science and Engineering, Dalian University of Technology, Dalian 116000, China
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Materials 2020, 13(11), 2508; https://doi.org/10.3390/ma13112508
Received: 8 April 2020 / Revised: 26 May 2020 / Accepted: 27 May 2020 / Published: 31 May 2020
(This article belongs to the Special Issue Advanced Metal Forming Processes)
High-nitrogen ductile iron (DI) was prepared by a new method of injecting nitrogen gas into molten iron and nodularizing treatment. The microstructure and mechanical properties of the as-prepared DI for different nitrogen gas injection periods were characterized. The graphite morphology gradually deteriorated with the increase in the nitrogen gas injection time. The maximum nitrogen and pearlite contents were obtained after 20 min of nitrogen gas injection, and the corresponding tensile strength and elongation of the DI were calculated as 492 MPa and 9.5%, respectively, which were 9.3% and 22% higher than those of the DI prepared without the nitrogen gas injection treatment, respectively. View Full-Text
Keywords: ductile iron; nitrogen gas; graphite morphology; tensile strength ductile iron; nitrogen gas; graphite morphology; tensile strength
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MDPI and ACS Style

Tong, L.; Liu, S.; Jie, J.; Li, T. Preparation of High-Nitrogen Ductile Iron by Injecting Nitrogen Gas in Molten Iron. Materials 2020, 13, 2508. https://doi.org/10.3390/ma13112508

AMA Style

Tong L, Liu S, Jie J, Li T. Preparation of High-Nitrogen Ductile Iron by Injecting Nitrogen Gas in Molten Iron. Materials. 2020; 13(11):2508. https://doi.org/10.3390/ma13112508

Chicago/Turabian Style

Tong, Lifeng; Liu, Shichao; Jie, Jinchuan; Li, Tingju. 2020. "Preparation of High-Nitrogen Ductile Iron by Injecting Nitrogen Gas in Molten Iron" Materials 13, no. 11: 2508. https://doi.org/10.3390/ma13112508

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