Microstructure and texture evolution during different annealing processes in interstitial free steel by ASP
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摘要: 對ASP生產Ti-IF鋼的退火再結晶過程分別進行了罩式退火和連續退火模擬實驗,通過金相組織觀察和力學性能檢測,并結合X射線衍射和電子背散射衍射技術,從不同的實驗角度對再結晶組織和織構的形成及演變進行了研究.結果表明,由于罩式退火和連續退火兩者的熱歷史過程不同,其再結晶組織轉變溫度及晶粒度有所不同,但是再結晶核心的形成位置及演變方式趨于一致,形核方式趨向于擇優形核.Abstract: Microstructure and texture evolution due to recrystallization in cold rolled interstitial free (IF) steel during batch annealing (BA) and continuous annealing (CA) was investigated by mechanical properties testing, optical microscopy, X-ray diffraction and electron back-scattered diffraction. The mechanism responsible for the evolution was discussed experimentally from different aspects. It is shown that batch annealing and continuous annealing have different thermal histories, so the transition temperature of recrystallization and the reerystallized grain size are different. But the nucleation sites and evolution modes of new recrystallization nuclei are consistent, which belong to the same nucleation mechanism. The formation of recrystallization textures is well explained by the oriented nucleation mechanism rather than the selective growth mechanism.
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Key words:
- interstitial free steel /
- annealing /
- microstructure /
- texture /
- recrystallization /
- nucleation
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