刘莹莹,刘长瑞,王庆娟,李洁,尤雪磊

• 1:西安建筑科技大学冶金工程学院

摘要(Abstract)：

采用一种大塑性变形方法-连续变断面循环挤压法,研究材料在镦粗工序时的变形特征及金属流动规律,并就改善镦粗时的鼓形、失稳折叠现象进行理论分析。研究表明,沿着高向(轴向),材料由上向下依次变形,且直径增大幅度和厚度减小幅度均从上到下依次减小,是一种不均匀变形;面积增大是由于金属质点沿径向流动和侧面翻平叠加的结果。而镦粗工序就是利用这种设定的不均匀变形方法的"时空"特点,改善和消除圆柱体镦粗时产生鼓形及失稳折叠的不均匀变形。

关键词(KeyWords)： 连续变断面循环挤压;工艺参数;变形特征;金属流动规律

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51101116)

作者(Author): 刘莹莹,刘长瑞,王庆娟,李洁,尤雪磊

DOI: 10.13289/j.issn.1009-6264.2014.12.014

参考文献(References)：

• [1]Valiev R.Nanomaterial advantage[J].Nature,2002,419:887-889.
• [2]赵新海,赵国群,王同海.锻件变形均匀性控制的研究[J].中国机械工程,2002,13(2):51-54.ZHAO Xin-hai,ZHAO Guo-qun,WANG Tong-hai.Study on uniform deformation control of forgings[J].China Mechanical Engineering,2002,13(2):51-54.
• [3]汪程鹏.减小圆柱形坯料镦粗鼓形的模拟研究[J].锻压装备与制造技术,2008,43(6):59-61.WANG Cheng-peng.Simulation of decreasing drum shape in the cylindrical billet upsetting process[J].China Metal Forming Equipment&Manufacturing Technology,2008,43(6):59-61.
• [4]李峰,徐永超,李超,等.铝合金方环件压缩变形规律及机理[J].中国有色金属学报,2011,21(11):2751-2756.LI Feng,XU Yong-chao,LI Chao,et al.Deformation rule and mechanism in compress process of aluminum alloy square ring[J].The Chinese Journal of Nonferrous Metals,2011,21(11):2751-2756.
• [5]刘长瑞,王庆娟,杜忠泽,等.连续变断面循环挤压制备细晶材料的新方法[J].稀有金属材料与工程,2009,38(S1):257-260.LIU Chang-rui,WANG Qing-juan,DU Zhong-ze,et al.Technology of producing refined grain materials by continuous variable cross-section recycled extrusion[J].Rare Metal Materials and Engineering,2009,38(S1):257-260.
• [6]刘长瑞,任红霞,王庆娟,等.镁合金AZ31连续变断面体循环挤压的组织及性能[J].轻合金加工技术,2009,37(7):34-37.LIU Chang-rui,REN Hong-xia,WANG Qing-juan,et al.Microstructure and properties of AZ31 magnesium alloy by Continuous Variable Cross-section Recycled Extrusion[J].Light Alloy Fabrication Technology,2009,37(7):34-37.
• [7]张娟,刘长瑞,王庆娟,等.纯铝1A85连续变断面循环挤压过程的组织演变[J].材料科学与工程学报,2010,28(6):930-933.ZHANG Juan,LIU Chang-rui,WANG Qing-juan,et al.Structural evolution of pure aluminum 1A85 during continuous variable cross-section recycled extrusion[J].Journal of Materials Science&Engineering,2010,28(6):930-933.
• [8]陈明,刘长瑞,杜忠泽,等.连续变断面体挤压过程金属的变形特征[J].热加工工艺,2007(17):43-45.CHEN Ming,LIU Chang-rui,DU Zhong-ze,et al.Deformation behaviors of metal by continuous variable cross-section recycled extrusion[J].Hot Working Technology,2007(17):43-45.

文章评论(Comment)：