冷作强化非调质钢冷变形过程中的鲍辛格效应  

Bauschinger Effect of Microalloyed Steel for Cold Heading Bolt in Cold Drawing Process

作　　者：马晓平[1] 惠卫军[1] 刘春明[2] 于同仁[3] 孙维[3] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081 [2]东北大学材料与冶金学院,辽宁沈阳110004 [3]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《钢铁研究学报》2007年第1期39-43,52,共6页Journal of Iron and Steel Research

基　　金：国家高技术发展计划资助项目(2005AA00110)

摘　　要：为了降低冷作强化非调质钢冷镦变形的变形抗力,研究了冷作强化非调质钢MFT8在冷变形过程中的鲍辛格效应。结果表明,鲍辛格效应随冷拔减面率γ增加而提高;γ=30%时,鲍辛格效应最大,压缩真应力最小;γ>30%时,压缩真应力重新提高,这是鲍辛格效应与加工硬化共同作用的结果,即加工硬化抵消了鲍辛格效应。In order to lower the flow stress in the cold heading process, the Bausehinger effect of mieroalloyed steel MFT8 for cold heading bolt was studied. The result shows that the Bauschinger effect increases with increasing cold-drawing reduction γ. When γ reaches 30%, the Bauschinger effect is most significant, while the compression flow stress has a minimum value and the compression flow stress arises again when γ is higher than 30%. This result is attributed to the interaction of Bauschinger effect and work hardening, that is to say, work hardening counteracts the Bauschinger effect.

关 键 词：鲍辛格效应 冷变形 冷作强化 非调质钢 

分 类 号：TG151.2[金属学及工艺—热处理]