厚规格热镀锌板折弯开裂分析及改进措施  

Cause analysis and improvement measures for bending cracks appeared on thick hot-dip zinc-coated plate

作　　者：张百勇 柴立涛[1] 王滕[1] 杨平[1] 李超[1] ZHANG Baiyong;CHAI Litao;WANG Teng;YANG Ping;LI Chao(Ma’anshan Iron and Steel Co.,Ltd.,Ma’anshan 243000,China)

机构地区：[1]马鞍山钢铁股份有限公司,安徽马鞍山243000

出　　处：《电镀与涂饰》2022年第13期948-952,共5页Electroplating & Finishing

基　　金：国家重点研发计划专项资助项目(2017YFB0304300,2017YFB0304305)。

摘　　要：通过观察裂纹的宏观和微观形貌,对厚规格热镀锌板180°折弯开裂现象的原因进行分析。结果表明,基板中存在大尺寸珠光体团是主要原因。调整镀前基板的热轧工艺后,基板中的珠光体团尺寸由原来的40μm减小到10μm以下,180°折弯后镀锌板无开裂。The cause of cracks formed on thick hot-dip zinc-coated plate after being bended for 180°was analyzed by observing the appearance and microscopic morphology of cracks.It was found that the main cause was the existence of large-sized pearlite cluster in the substrate.The size of pearlite cluster in substrate was decreased from 40μm to 10μm below through adjusting the hot-rolling process conditions of substrate prior to hot-dip coating,and there was no crack on hot-dip zinc-coated plate after bending 180°.

关 键 词：热镀锌板 厚规格 折弯开裂 热轧 退火 

分 类 号：TQ153.15[化学工程—电化学工业]