| 高速切削淬硬钢主剪切区绝热剪切失稳微观机理研究 |
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| 引用本文： | 段春争,王敏杰,李国和,窦涛.高速切削淬硬钢主剪切区绝热剪切失稳微观机理研究[J].大连理工大学学报,2010,50(4):502-507. |
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| 作者姓名： | 段春争 王敏杰 李国和 窦涛 |
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| 作者单位： | 大连理工大学,机械工程学院,模塑制品教育部工程研究中心,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 使用光学显微镜、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对高速切削淬硬30CrNi3MoV高强度钢形成的锯齿状切屑主剪切区内材料微观特征进行了观察,并对绝热剪切失稳的微观机理进行了分析.微观观察和分析结果表明,绝热剪切带中心由平均直径0.4～0.6μm的细小等轴晶粒组成,过渡区内为碎化并沿剪切方向拉长的马氏体板条组织.锯齿状切屑的形成应归因子主剪切区材料绝热剪切失稳的发生,在此过程中,动态回复和再结晶成为微结构演化的主要冶金过程,绝热温升起到了关键作用.等轴晶组织的形成机制为旋转式动态再结晶.
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| 关 键 词： | 高速切削 锯齿状切屑 主剪切区 绝热剪切失稳 |
Research on microscopic mechanism of adiabatic shear instability in primary shear zone during high-speed machining hardened steel |
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| DUAN Chunzheng,WANG Minjie,LI Guohe,DOU Tao.Research on microscopic mechanism of adiabatic shear instability in primary shear zone during high-speed machining hardened steel[J].Journal of Dalian University of Technology,2010,50(4):502-507. |
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| Authors: | DUAN Chunzheng WANG Minjie LI Guohe DOU Tao |
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| Institution: | DUAN Chun-zheng,WANG Min-jie,LI Guo-he,DOU Tao Engineering Research Center for Mould & Plastics of the Ministry of Education,School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China |
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| Abstract: | The metallurgical characters of the primary shear zones in the serrated chips produced during high-speed machining 30CrNi3MoV quenched high strength steel were observed using optical microscope, scanning electron microscopy (SEM) and transmission electro |
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| Keywords: | high-speed machining serrated chip primary shear zone adiabatic shear instability |
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