沙漏挤压镦粗复合加工技术  

EXTRUSION-UPSETTING MULTIPLE PROCESSING IN SANDGLASS

作　　者：陆文林[1] 王勇[1] 冯泽舟[1] 海锦涛[1] 

机构地区：[1]北京机电研究所,100083

出　　处：《塑性工程学报》2000年第4期1-4,共4页Journal of Plasticity Engineering

基　　金：国家自然科学基金

摘　　要：本文研究了一种新的晶粒细化方法 :沙漏挤压工艺。这种工艺是在一定温度下通过对材料进行反复挤压产生大的塑性变形 ,同时进行动态再结晶而使材料得到细化。本文对铸态 Zn- Al合金进行了实验 ,初步研究了沙漏挤压工艺对于材料组织和性能的影响。实验结果表明 :沙漏挤压工艺能够有效的细化晶粒 ,使材料获得均匀的等轴细晶组织和优良的综合性能 。A new method of attaining ultrafine grain size has been developted,which is extrusion\|upsetting multiple processing in sandglass (EUMP).This technology is conducted at a certain temperature.The test material gets high strain during extrusion upsetting,at the same time the dynamic recrystallization happened,So the ultrafine grain size can be got.In this paper we did experiments on ingot Zn\|5%Al alloy,to find the effect of sandglass extrusion technology on the microstructures and properties of the test material.The experiment results show that sandglass extrusion technology can fine the grain size effectively,and the material after sandglass extrusion can attain fine and uniform microstructures and super mechanical properties,and can help to realize high strain rate superplasticity.

关 键 词：细化晶粒 锌铝合金 沙漏挤压镦粗 复合加工 

分 类 号：TG376.5[金属学及工艺—金属压力加工]