【作者】 鲍培玮； 刘志民； 邢书明；

【Author】 BAO Peiwei,LIU Zhimin,XING Shuming (School of Mechanical and Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100084,China

【机构】 北京交通大学机械与电子控制工程学院；

【摘要】 双辊铸轧工艺过程的特点决定了铸轧薄带组织的不均匀性,为了研究这种不均匀性在后续冲压过程中的变化及影响,对铸轧镁板进行了冲压实验,并通过对铸轧镁合金薄板采用预变形处理,减小这种组织不均匀性带来的不利影响。通过微观组织观察发现,预变形处理后镁板微观组织结构得到了细化,组织不均匀性程度减小。冲压实验结果表明,预变形处理减小了这种组织不均匀性对冲压性能的不利影响,深冲性能获得很大提高,在160℃拉深时已经可以获得LDR=2.26的完整杯形件,这已经与经过轧制的镁板的深冲值相接近。更多还原

【Abstract】 The structure inhomogeneity of twin roll strip result in its technology features.The punching test was carried out to found the change and influence of this inhomogeneity,and pre deformation was used to reduce the unfavorable influence.It was found that the microstructure of strip become fine after pre-deformation.The punching test also show that the deep drawability was improved,the perfect cup shell was obtained under 433K,the LDR is 2.26 at this condition,this value is close to the value of rolled magnesium alloy strip.更多还原