Experimental study on multi-pass dieless drawing process of superplastic Zn-22%Al alloy microtubes

被引：53

作者：

Furushima, T. ^{[1
]}

Manabe, K. ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Dept Mech Engn, Hachioji, Tokyo 1920397, Japan

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2007年 / 187卷 / 236-240期

关键词：

multi-pass dieless drawing; microtube; superplasticity; Zn-22%Al alloy; surface roughness;

D O I：

10.1016/j.jmatprotec.2006.11.204

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fabrication process of superplastic microtubes using multi-pass dieless drawing is studied experimentally. The superplastic material used in this experiment is a Zn-22%Al alloy tube with an outer diameter of 2 mm and wall thickness of 0.5 mm. A high-frequency induction heating apparatus with an air-cooling nozzle is used for the dieless drawing. As a result, after four-pass dieless drawing, a microtube with outer and inner diameters of 190 and 91 mu m, respectively, is fabricated successfully. It is confirmed that the ratio of inner to outer tube diameters remains a certain constant value in multi-pass dieless drawing. In addition, microtubes fabricated by this process are evaluated by their microstructure and surface roughness. Consequently, it is found that the manufacture of initial tubes with fine grains and high accuracy is essential for fabricating superior micrombes. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：236 / 240

页数：5

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