金屬粉末射出成形零件的尺寸穩定性研究
Date Issued
2000
Date
2000
Author(s)
黃坤祥
DOI
892216E002022
Abstract
The major advantage of the powder
injection molding process is its ability to
produce net or near net shaped components
with good mechanical properties. However,
the dimensional control of PIM compacts has
been the most critical hindrances of the
further growth of this technology. This
problem occurs mostly during the debinding
and sintering processes. This study uses the
laser and thermal dilatometers to analyze the
in-situ length change during debinding and
sintering. The emphasis was on the binder
content and processing parameters. The
results show that the 7% binder was the best
compared to the 6.5% and the 8% binder
systems. The major binder content should be
no less than 30% when the repeatability of
the dimension is required. The uneven crosssection
thickness in the compact, high
solvent debinding temperature greater than
45℃, and hydrogen atmosphere were also
shown to be the causes of distortion. With
these data, the mechanism of the expansion
and distortion are analyzed and suggestion on
the process and the required material
characteristics are presented.
Subjects
powder injection molding
defects
distortion
dimensional control
Publisher
臺北市：國立臺灣大學材料科學與工程學研究所
Type
report
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