|
Abstract: Research
on microforming of fine grained superplastic Zn-Al22 alloy is carried
out by means of superplastic forming. With the selected material,
microformability tests are carried out by using two kinds of stainless
steel dies: one with micro-cavity, the other with micro-channel.The
results are evaluated with the developed evaluation method.
Characteristics of micro-formabi-lity
of the material are clarified with micro-extrusion tests. Effec-ts
of lubrication, press and die structure on forming are analy-sed. SEM is
used to analyse surface topograph of the formed specimens.
Key words: Superplasticity
Micro-forming Extrusion Zn-Al22 alloy
CLC No: TG376.2
Received
20030103, received in revised form 20030616
|