Phase Transformation Behavior and Microstructure Characterization of 9Ni Cryogenic Steel

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Abstract:

The SHCCT (simulated heat affected zone continuous cooling transformation) of 9Ni cryogenic steel were investigated. The microstructures observed in simulated heat affected zone (HAZ) continuous cooled specimens are composed of bainite (B) and martensite (M) depending on the cooling rates. The dimension of prior austensite grain, M-A constituent content, M-A dimension, M-A area density increase with increased the time of t8/5.

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Advanced Materials Research (Volumes 472-475)

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1183-1187

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February 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] Jae-il Jang, Jang-Bog Ju, Baik-Woo Lee, Dongil Kwon, Woo-Sik Kim. Effect of microstructural change on fracture characteristics in coarse-grained heat-affected zones of QLT-processed 9% Ni steel. Materials Science&Engineering A. 340(2003):68~79.

DOI: 10.1016/s0921-5093(02)00190-9

Google Scholar

[2] R. A. Grange. Strengthening steel by austenite grain refinement, Trans. ASM, 1966, 59(1):26~48.

Google Scholar

[3] H. Kitahara, R. Ueji, N. Tsuji, Y. Minamino. Crystallographic features of lath martensite in low-carbon steel. Acta Mater. 2006, 54:1276~1288.

DOI: 10.1016/j.actamat.2005.11.001

Google Scholar

[4] Swarr T, Krauss G. The effect of structure on the deformation of as 2quenched and tempered martensite in a Fe 2012 pct C alloy [J]. Metall Trans A, 1976, 7A(1):41~48.

DOI: 10.1007/bf02644037

Google Scholar

[5] Chunfang Wang, Maoqiu Wang, Jie Sui, Weijun Hui and Han Dong, Effect of Microstructure Refinement on the Strength and Toughness of Low Alloy Martensitic Steel, J. Mater. Sci. Technol, 2007, 23(5):659~664.

Google Scholar

[6] S. Morito, H. Tanaka, R. Konishi, T. Furuhara, T. Maki, Acta Mater. 51(2003):1789.

Google Scholar

[7] S. Morito, H. Saito, T. Ogawa, T. Furuhara, T. Maki, ISIJ Int. 45(2005):91.

Google Scholar

[8] T. Inoue, S. Matsuda, Y. Okamura, K. Aoki, Trans. JIM11 (1970):36.

Google Scholar

[9] Wang Yuhui, Liao Bo, Liu Ligang, Li Xianfeng, Su Hang, Yang Caifu and Wang Qingfeng. Effects of N and B on continuous cooling transformation diagrams of Mo-V-Ti micro-alloyed steels. Phase Transitions. In press.

DOI: 10.1080/01411594.2011.611401

Google Scholar

[10] H Adrianet al, Material Science and Technology, 7(1991)2:176.

Google Scholar

[11] Wenwen Xu, Qingfeng Wang, Tao Pan, Hang Su, Caifu Yang. Effect of Welding Heat Input on Simulated HAZ Microstructure and Toughness of a V-N Microalloyed Steel J. Iron Steel Res. Int., 2007; 14: 234-9.

DOI: 10.1016/s1006-706x(08)60085-0

Google Scholar