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  4. 连续变断面循环挤压与等通道转角挤压技术的工艺特征及其应用

材料导报, 2014, 28(17): 64-68. doi: 10.11896/j.issn.1005-023X.2014.17.011

连续变断面循环挤压与等通道转角挤压技术的工艺特征及其应用

李洁 1, , 刘莹莹 2, , 王庆娟 3, , 尤雪磊 4, , 王坤 5,

1.西安建筑科技大学冶金工程学院,西安,710055

2.西安建筑科技大学冶金工程学院,西安,710055

3.西安建筑科技大学冶金工程学院,西安,710055

4.西安建筑科技大学冶金工程学院,西安,710055

5.西安建筑科技大学冶金工程学院,西安,710055

基金项目:   国家自然科学基金(51101116,51104113)  

关键词： 大塑性变形 , 等通道转角挤压 , 连续变断面循环挤压 , 晶粒细化

Process Characteristics and Applications of Continuous Variable Cross-section Recycled Extrusion and Equal Channel Angular Pressing

Keywords： severe plastic deformation , equal channel angular pressing , continuous variable cross-section recycled extrusion , grain refinement

分别论述了等通道转角挤压法与连续变断面循环挤压法这两种大塑性变形方法的工艺原理、工艺流程、模具结构、变形特征以及累积应变量与模具结构参数之间的关系;并系统介绍了这两种方法在制备纯铝、镁合金及钛合金细晶材料方面的应用,明确了连续变断面循环挤压法与等通道转角挤压法均是细化合金组织,提高材料强度、塑性等综合性能的有效途径.通过分析对比,提出这两种大塑性变形方法各自的优势和存在的问题,以及未来的发展方向.

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