论文部分内容阅读
简介了几种常用钢种电塑性拔丝的主要实验结果，综合分析钢丝电塑性变形不同层次结构的演变过程，对电塑性变形的机制问题进行了讨论。在微观结构层次上，电塑性效应基本上产生于强脉冲电流的电子对运动位错的激活作用，推动滑移变形的发展。在介观层次上，高密度的脉冲电流造成大量超弥散结构的伸长区，十分有利于向错的大量发射，实现变形的转动机制，导致大的变形甚至超塑性变形。这是电塑性变形最本质阶段。宏观层次上，强电流的脉冲刺激，主要在于减弱织构的发展，改善组织的形态，造成有利的应力应变状态。
In this paper, the main experimental results of electroplating of several commonly used steels are introduced. The evolution of different layers of electroformed steel is analyzed synthetically. The mechanism of electroplastic deformation is discussed. At the microstructure level, the electroplasma effect basically arises from the activation of the motion dislocation by the electrons of the intense pulse current, which promotes the development of the slip deformation. At the mesoscopic level, the high density pulse current causes a large number of elongated zones of the super-diffusive structure, which is very conducive to a large number of emission to the wrong, to achieve deformation of the rotation mechanism, leading to large deformation and even superplastic deformation. This is the most essential stage of electroplastic deformation. On the macroscopic level, the impulse stimulation of the strong electric current is mainly to weaken the development of the texture, improve the morphology of the tissue and result in a favorable stress-strain state.