Acta Metall Sin  2010, Vol. 46 Issue (12): 1549-1556    DOI: 10.3724/SP.J.1037.2010.00349

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FABRICATION PROCESS, MICROSTRUCTURE AND MECHANICAL PROPERTIES OF BFe10–1–1 ALLOY TUBES BY CONTINUOUS UNIDIRECTIONAL SOLIDIFICATION

GAN Chunlei, LIU Xuefeng, HUANG Haiyou, XIE Jianxin

Key Laboratory for Advanced Materials Processing (Ministry of Education), University of Science and Technology Beijing, Beijing 100083

GAN Chunlei LIU Xuefeng HUANG Haiyou XIE Jianxin. FABRICATION PROCESS, MICROSTRUCTURE AND MECHANICAL PROPERTIES OF BFe10–1–1 ALLOY TUBES BY CONTINUOUS UNIDIRECTIONAL SOLIDIFICATION. Acta Metall Sin, 2010, 46(12): 1549-1556.

Abstract References Related Articles Recommended Metrics Download:  PDF(2172KB)  Export:  BibTeX | EndNote (RIS)       Abstract  BFe10–1–1 cupronickel alloy tubes were fabricated by the vertical downward continuous unidirectional solidification with vacuum melting and argon–shield. The effects of processing parameters on the surface quality of alloy tubes have been investigated, and the microstructure and mechanical properties of cupronickel alloy tubes were characterized. The results show that BFe10–1–1 cupronickel alloy tubes having smooth surface and columnar crystal structure, with a diameter of 10 mm and thickness of 1.7 mm could be fabricated at a range of melting temperatures from 1250℃ to 1280 ℃ matching well with the withdrawal speed range from 0.15 mm/s to 0.45 mm/s on the conditions of coolnwater flow volume 900 L/h, cooling dstance 8 mm and cooling water temperature 25 ℃. The segregation ratio of Mn is larger than one, indicating the Mn tends to partition preferentially to the interdendritic region, whereas Ni and Fe to dendritic structure. Comparing with alloys fabricated by traditional casting, the degree of microsegregation of the alloy fabricated by continuous unidirectional solidification is reduced. The elongation of 49% at room temperature for the fabricated cupronickel alloy tubes exhibits excellent plastic deformation property. BFe10–1–1 cupronickel alloy tubes fabricated by the continuous unidirectional solidification have the tensile strength of 212 MPa which is markedly reduced compared wth cupronickel alloys produced by conventional casting, and are particularly advantageous to subseqent processing. Key words:  BFe10-1-1 alloy      continuous unidirectional solidification      columnar crystal      microsegregation      tube      Received:  14 July 2010      ZTFLH:  TG 249.7     TG 146.1   Fund:  Supported by National Basic Research Program of China (No.2006CB605200) and National Natural Science Foundation of China (No.50674008) Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors HAN Chun-Lei LIU Xue-Feng HUANG Hai-You XIE Jian-Xin URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00349     OR     https://www.ams.org.cn/EN/Y2010/V46/I12/1549 null [1] LUO Wenze, HU Long, DENG Dean. Numerical Simulation and Development of Efficient Calculation Method for Residual Stress of SUS316 Saddle Tube-Pipe Joint[J]. 金属学报, 2022, 58(10): 1334-1348. [2] BI Sheng, LI Zechen, SUN Haixia, SONG Baoyong, LIU Zhenyu, XIAO Bolv, MA Zongyi. 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