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| Effect of Combined Additions of Mo-B on Transformation and Microstructure of Ultra High-strength Pipeline Steels |
| WEI Wei;; |
| 中国科学院金属研究所 |
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Cite this article:
WEI Wei. Effect of Combined Additions of Mo-B on Transformation and Microstructure of Ultra High-strength Pipeline Steels. Acta Metall Sin, 2007, 43(9): 943-948 .
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Abstract The transformation characteristic, microstructure and micro-hardness for ultra high-strength pipeline steels with different content of Mo and B as well as different Mo/B ratio were investigated in this paper. Combined additions of Mo and B were found to more effectively increase the hardenability of the steel than the individual effectiveness of these two elements, which increase the volume fraction of bainite in microstructure and enhance the hardness of the steel. The experimental results showed that there should be an optimum Mo/B ratio to achieve the optimum microstructure and mechanical properties of the steel. The mechanism for the combined Mo-B effect on ultra high-strength pipeline steels was also discussed.
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Received: 18 December 2006
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