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本文研究了临界区处理对低碳Mn-V钢Bauschinger效应(以下简称BE)的影响。结果发现,正火状态的低碳Mn-V钢的应力应变曲线的Lüders带区的BE大于加工硬化区,并且在Lüders应变区没有永久软化。临界区处理消除了正火状态低碳钢应力应变曲线上的Lüders带,降低了BE的应变参量,提高了BE的能量参数和永久软化;分析了引起这种变化的原因,讨论了各BE参量(特别是Bauschinger能量参量)的物理意义。
This paper studies the effect of critical zone treatment on Bauschinger effect (BE) of low carbon Mn-V steel. The results show that BE of Lüders zone of the stress-strain curve of normalized low-carbon Mn-V steel is larger than that of work hardening zone and there is no permanent softening in Lüders strain zone. The critical zone treatment eliminates the Lüders zone on the stress-strain curve of normalized low-carbon steel, reduces the strain of BE, increases the energy parameters and permanent softening of BE, analyzes the causes of this change, (Especially the Bauschinger energy parameter).