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| QUANTITATIVE INVESTIGATION OF STRAIN INDUCED PRECIPITATION IN COARSE AUSTENITE GRAINED HTP STEEL |
| [中]张玲 [英]ZHANG-Ling;;; |
| 北京科技大学 |
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Cite this article:
ZHANG-Ling. QUANTITATIVE INVESTIGATION OF STRAIN INDUCED PRECIPITATION IN COARSE AUSTENITE GRAINED HTP STEEL. Acta Metall Sin, 2007, 43(8): 791-796 .
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Abstract Quantitative analysis of strain-induced NbCN precipitates in a low-carbon high-Nb microalloyed steel with coarse grained austenite was investigated by applying double-hit tests and SUPRA55 field emission microscopy. The results have shown that the precipitation-start time adopts the C curve form. When deformed and held at 1000℃～900℃, the particle number density increases while particle diameter decreases with decreasing of deformation temperature. The precipitation kinetics obeys the modified Avrami equation and the Avrami exponent is about 1.1. The models developed in this experiment predict the precipitation-start time and precipitation kinetics well.
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Received: 24 November 2006
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