Thermodynamic model for precipitation of carbonitrides in microalloyed steels and its application in Ti–V–C–N system
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- 作者：Yan-Lin Wang ; Long-Chao Zhuo ; Ming-Wen Chen ; Zi-Dong Wang
- 关键词：Microalloyed ; Carbonitrides ; Thermodynamic model ; Dissolution
- 刊名：Rare Metals
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：35
- 期：10
- 页码：735-741
- 全文大小：1,963 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Metallic Materials
Chinese Library of Science - 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
- ISSN：1867-7185
- 卷排序：35
文摘
Based on mass balance and solubility product equations, a thermodynamic model enabling the calculation of equilibrium carbonitride composition and relative amounts as a function of steel composition and temperature was developed, which provides a method to estimate the carbonitride complete dissolution temperature for different steel compositions. Actual carbonitride precipitation behavior was further verified in Ti–V–C–N microalloyed steel system. The model suggests that for higher [V] and [Ti] dissolved in steels, it is available to decrease the addition of C and N during alloy composition design. The resultant longer fatigue life of the modified steel could be attributed to the more [V] and [Ti] dissolved in the matrix, inducing finer dispersion of carbonitrides. Therefore, this model is proved to be effective in determining better chemical composition for high-performance steels, leading to possible reductions in the cost of production and improvements in the combined mechanical properties of the steels.