轧制中电塑性效应单电脉冲影响区间的实验研究  

Experimental study on electro-plastic effect in affect duration of single electric pulse in rolling

作　　者：孙利娜 李强 李明 SUN Li-na;Ll Qiang;LI Ming(National Engineering Research Center for Equipment and'Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《塑性工程学报》2020年第10期21-26,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51771163)。

摘　　要：以Zr金属为研究对象,开展电塑性轧制实验,对比观察各道次的电脉冲波形和脉冲通过时的轧制力变化。结果表明:在1个脉冲周期内,纯电塑性效应只在脉冲时间内才会发生,单电脉冲对轧制过程的影响时间远小于周期脉冲,只有在这个影响时间段内,脉冲电流与轧制力波动才能实现严格对照;在严格的单电脉冲影响时间段内,脉冲电流对轧制力产生影响的主要特征是轧制力的波动幅度和波动反应时间;随着轧件变形程度的增加,电脉冲导致的轧制力波动幅度逐渐降低,电流脉冲产生的影响减弱;随着轧件变形程度的增加,脉冲电流通过时的轧制力波动反应时间缩短。Taking Zr metal as the research object,the electro-plastic rolling experiment was conducted,and the electric pulse waveform and the rolling force change during the passing of electric pulse in each pass were compared and observed.The results show that the pure electric-plastic effect only occurs in the duration of the electric pulse in a period.The influence time of single electic pulse on rolling process is far less than that of the period electric pulse.Only in this influence period of single electric pulse,the pulse current and rolling force fluctuation are strictly corresponding.In the strict influence time of single electric pulse,the main influence characteristics of pulse current on rolling force are the fluctuation amplitude and the fluctuation reaction time.With the increase of deformation degree of rolled piece,the fluctuation amplitude of rolling force caused by electric pulse is gradually reduced,and the effect of eletric pulse decreases;with the increase of deformation degree of rolled piece,the fluctuation reaction time of rolling force caused by pulse current is shortened.

关 键 词：电塑性 单电脉冲 轧制力 波动幅度 波动反应时间 

分 类 号：TG335.1[金属学及工艺—金属压力加工]