| 冲头形状ECAP模拟分析研究 |
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| 引用本文： | 宋宇晨,张良学,张泽平,李成,卢芳园,钟艳梅,汪程鹏.冲头形状ECAP模拟分析研究[J].锻压装备与制造技术,2017,52(2). |
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| 作者姓名： | 宋宇晨 张良学 张泽平 李成 卢芳园 钟艳梅 汪程鹏 |
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| 作者单位： | 太原理工大学材料科学与工程学院,山西太原,030024 |
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| 摘 要： | 等通道角挤压(ECAP)是剧烈塑性变形制备超细晶材料的一种有效变形方式,常规的ECAP工艺获得组织不够均匀,损伤较大,由此提出了一种新型的ECAP冲头形状的改良研究。本文采用DEFORM-3D有限元模拟分析ECAP工艺变形机理的方案,引入几何参数λ,即理论剪切面与冲头和坯料的交界面之间的顺时针夹角,研究发现相比传统的水平冲头(λ=45°),采用λ=90°形状冲头可提高经一次通道ECAP挤压后坯料的均匀性,采用λ=0°的冲头的ECAP形变平均损伤显著减小。本研究可为ECAP的工艺研究提供理论指导。
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| 关 键 词： | 等通道角挤压 冲头形状 塑性变形 数值模拟 |
ECAP simulation and analysis research of the punchshape |
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| SONG Yuchen,ZHANG Liangxue,ZHANG Zeping,LI Cheng,LU Fangyuan,ZHONG Yanmei,WANG Chengpeng.ECAP simulation and analysis research of the punchshape[J].China Metalforming Equipment & Manufacturing Technology,2017,52(2). |
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| Authors: | SONG Yuchen ZHANG Liangxue ZHANG Zeping LI Cheng LU Fangyuan ZHONG Yanmei WANG Chengpeng |
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| Abstract: | The DEFORM-3Dfinite element has been adopted to simulate and analyze the proposal of the process deformation mechanism for ECAP in the text.Anew geometric para meter λ.(the clockwise angle between theoretical shearing surface and the interface of punch and billet) has been introduced.By Comparing with conventional horizontal punch (h=45°),the uniformity of billet after extrusion by one-time ECAP channel has been improved by adopting the beveled punch (λ=90°).Whilethe average damage has been significantly reduced by adopting the beveled punch (λ=0°).It will provide theoretical guidance for process research of ECAP. |
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| Keywords: | Equal-channel angular extrusion Shape of punch Plastic deformation Numerical simulation |
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