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Comparison and analysis of dislocation density, morphology and evolution in microstructure of low-carbon steel produced using different technologies
作者姓名:Hao  Yu  Yonglin  Kang  Hongbo  Dong
作者单位:[1]Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China [2]Jinan Iron & Steel Group Co., Jinan 250101, China
基金项目:国家自然科学基金,霍英东教育基金
摘    要:Three kinds of specimens were produced from hot strips of similar composition and same thickness (nominal gauge 4.0 mm) but produced using different technologies, and the dislocation density of these strips was quantitatively measured by positron annihilation technique test. The dislocation morphology and evolution in microstructure of each pass for producing the 1.9 mm hot strip using CSP (compact strip production) technology were observed under an H-800 transmission electron microscope; its density was also quantitatively measured using the positron annihilation technique test, and the factors influencing the dislocation density during the production process were analyzed. The experimental results show that the dislocation density in the microstructure produced using CSP technology is higher than that in the microstructure produced using conventional technology. This result was discussed and confirmed on the basis of the finite element simulation and the theory relevant to dislocations.

关 键 词:紧凑型带钢生产  CSP生产线  显微结构  断层  正电子湮灭术  有限元模拟
收稿时间:2005-05-25

Comparison and analysis of dislocation density, morphology and evolution in microstructure of low-carbon steel produced using different technologies
Hao Yu Yonglin Kang Hongbo Dong.Comparison and analysis of dislocation density, morphology and evolution in microstructure of low-carbon steel produced using different technologies[J].Journal of University of Science and Technology Beijing,2006,13(5):406-410.
Authors:Hao Yu  Yonglin Kang  Hongbo Dong
Affiliation:1. Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China
2. Jinan Iron & Steel Group Co., Jinan 250101, China
Abstract:Three kinds of specimens were produced from hot strips of similar composition and same thickness (nominal gauge 4.0 mm) but produced using different technologies, and the dislocation density of these strips was quantitatively measured by positron annihilation technique test. The dislocation morphology and evolution in microstructure of each pass for producing the 1.9 mm hot strip using CSP (compact strip production) technology were observed under an H-800 transmission electron microscope; its density was also quantitatively measured using the positron annihilation technique test, and the factors influencing the dislocation density during the production process were analyzed. The experimental results show that the dislocation density in the microstructure produced using CSP technology is higher than that in the microstructure produced using conventional technology. This result was discussed and confirmed on the basis of the finite element simulation and the theory relevant to dislocations.
Keywords:compact strip production (CSP)  microstructure  dislocation  positron annihilation technique  finite element simulation
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