1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China 2. Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University, Ministry of Education of China, Qinhuangdao 066004, Hebei, China
Characteristics of Precipitation in an As-cast Nb- and V-containing High Nitrogen CrMn Austenitic Steel
1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China 2. Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University, Ministry of Education of China, Qinhuangdao 066004, Hebei, China
ժҪ The phase diagram of an Nb- and V-containing 18Mn18Cr0.5N steel was investigated using thermodynamic calculation. The compositions and characteristics of precipitates were investigated by scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction, and differential scanning calorimetry. Under equilibrium conditions, MX precipitates at 1350 ��. MX is a substitutional solid solution of Nb4N3.38, and its composition (at.%) is approximately: Nb 40, N 40, V 8, and Fe, Cr, and Mn balance. The precipitates, with shapes including irregular bulk, rod, and ellipsoid, are primarily distributed at grain boundaries and triple junctions, and their size is approximately 5-10 ��m. Finally, the microalloying of high nitrogen CrMn austenite steels, control of precipitate size, and the effect of precipitate on hot forming were discussed.
Abstract��The phase diagram of an Nb- and V-containing 18Mn18Cr0.5N steel was investigated using thermodynamic calculation. The compositions and characteristics of precipitates were investigated by scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction, and differential scanning calorimetry. Under equilibrium conditions, MX precipitates at 1350 ��. MX is a substitutional solid solution of Nb4N3.38, and its composition (at.%) is approximately: Nb 40, N 40, V 8, and Fe, Cr, and Mn balance. The precipitates, with shapes including irregular bulk, rod, and ellipsoid, are primarily distributed at grain boundaries and triple junctions, and their size is approximately 5-10 ��m. Finally, the microalloying of high nitrogen CrMn austenite steels, control of precipitate size, and the effect of precipitate on hot forming were discussed.
��������:Program for New Century Excellent Talents In University;Program for New Century Excellent Talents In University
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E-mail: wtfu@ysu.edu.cn
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Zhong-ping SHI,,Zhen-hua WANG,,Shu-hua SUN,Ze-an ZHOU,Ying-ping GUAN,Wan-tang FU. Characteristics of Precipitation in an As-cast Nb- and V-containing High Nitrogen CrMn Austenitic Steel[J]. �й������ڿ���, 2014, 21(10): 945-950.
Zhong-ping SHI,,Zhen-hua WANG,,Shu-hua SUN,Ze-an ZHOU,Ying-ping GUAN,Wan-tang FU. Characteristics of Precipitation in an As-cast Nb- and V-containing High Nitrogen CrMn Austenitic Steel. Chinese Journal of Iron and Steel, 2014, 21(10): 945-950.
2014, Vol. 21 
