Study of mechanism on microstructure refinement during compact strip production process
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- 作者：Yu ; Hao ; Kang ; Yonglin ; Wang ; Kelu ; Fu ; Jie ; Wang ; Zhongbing ; Liu ; Delu
- 关键词：Microstructure ; Compact strip production ; EBSD ; Texture ; Recrystallization ; Phase transformation
- 刊名：Materials Science and Engineering: A
- 出版年：2003
- 出版时间：December 20, 2003
- 年：2003
- 卷：363
- 期：1-2
- 页码：86-92
- 全文大小：313 K
文摘
In this study, microstructures of 1.9mm hot strip steel produced by compact strip production (CSP) are investigated by using optical metallograph observation and electron back-scattered diffraction (EBSD) data to deduce the status of hot rolled austenite before phase transformation, because the evolution of hot rolled austenite is important to provide information for the microstructure refinement. The experimental results show that the finishing hot rolled microstructure is a mixture of recrystallized and deformed austenite, and the percentage of recrystallized austenite is greater than that of the deformed austenite. At last, microstructure evolution of austenite is modeled based on chemical compositions and techniques of producing 1.9mm hot strip. The simulation results agree well with experimental data. Analysis shows that microstructure refinement, recrystallization and supercooling rate are the primary causes to fine microstructure.