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利用X射线衍射技术研究了一种超低碳冷轧钢板快速加热过程中的回复和再结晶行为。结果表明加热速率对试样退火过程中的回复和再结晶行为影响显著:640℃退火时,不同加热速率退火条件下的试样均处于回复阶段。X射线衍射峰型的不同表明快速加热时因可用于回复的时间缩短而使试样的回复过程被推迟。720℃退火时,快速加热条件下的试样处于再结晶开始阶段,而慢速加热条件下的试样已基本完成再结晶,处于晶粒长大阶段。760℃退火时,慢速加热条件下试样已完成再结晶,而快速加热处理的试样在板中心处仍存在少量轧态纤维组织。原因主要在于快速加热导致可用于回复和再结晶的时间缩短,而使试样的回复及再结晶行为被推迟。
X-ray diffraction was used to study the recovery and recrystallization behavior of a ultra-low carbon cold-rolled steel during rapid heating. The results show that the heating rate significantly affects the recovery and recrystallization behavior of the samples during annealing. When annealed at 640 ℃, the samples annealed at different heating rates are in the recovery stage. The difference in X-ray diffraction peak pattern indicates that the sample recovery process is postponed due to the shortening of the time available for recovery at rapid heating. When annealing at 720 ℃, the sample under rapid heating condition is at the beginning of recrystallization, while the sample under slow heating condition has basically completed recrystallization at the stage of grain growth. When annealed at 760 ℃, the sample has been recrystallized under the condition of slow heating. However, there is still a small amount of rolled fiber in the center of the plate after rapid heating treatment. The main reason is that the rapid heating leads to a shortening of the time available for recovery and recrystallization, which retards the recovery and recrystallization behavior of the sample.