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热轧U型冷却工艺消除冷轧低碳钢带性能不均匀的实践与分析 被引量:1

Practice and analysis of eliminating non-uniformity of cold rolled low carbon steel strip by U-shaped cooling process for hot rolling
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摘要 通过显微组织观察和力学性能试验,研究了采用U型层流冷却工艺改善常规层流冷却工艺生产的冷轧SPCC钢带存在头部、尾部与中部组织和性能不均匀的效果。结果表明,采用常规层流冷却工艺时,热轧基板卷取后钢带头部、尾部与中部因温降速度不同而使组织中铁素体晶粒尺寸和碳化物形态产生差异,而后又遗传到冷轧退火后的组织,造成最终产品性能的不均匀。采用U型层流冷却工艺时,由于钢带头部和尾部的卷取温度较中部升高而使组织的差异减小,进而使冷轧退火后钢带头部、尾部与中部的组织与性能均匀性得到了明显的改善。 Through microstructure observation and mechanical properties test,the effect of U-shaped laminar cooling process on improve the uneven microstructure and properties of the head,tail and middle of the cold rolled SPCC steel strip produced by the conventional laminar cooling process was studied.The results show that when using the conventional laminar cooling process,the ferrite grain size and carbide morphology of the head,tail and middle of the hot rolled steel strip after coiling are different due to the difference of temperature drop rates,and then inherites to the microstructure after cold rolling and annealing,resulting in the uneven properties of the final product.When using the U-shaped laminar cooling method,the coiling temperature of the head and tail of the steel strip increases,which reduces the microstructure difference,and then the microstructure and properties uniformity of the head,tail and middle part of the steel strip after cold rolling and annealing are significantly improved.
作者 蒙曰睿 陆茂森 高江 巫佩凤 周博文 Meng Yuerui;Lu Maosen;Gao Jiang;Wu Peifeng;Zhou Bowen(Guangxi Liuzhou Iron and Steel Group Co.,Ltd.,Liuzhou Guangxi 545002,China)
出处 《金属热处理》 CAS CSCD 北大核心 2023年第7期162-166,共5页 Heat Treatment of Metals
关键词 U型冷却 连续退火 显微组织 U-shaped cooling continuous annealing microstructure
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