| Summary: | 碩士 === 國立海洋大學 === 機械與輪機工程學系 === 86 === ABSTRACT The semi-solid processing is a new manufacturing net-
shape process. However, lack of experience and practice of this
process is available in the native industries. In this study,
we designed a mold and a slug heater on Universal Testing
Machine for thixocasting. Experiment had shown that (1)
Shorting the slug heating process to avoid the increase of
superficial oxide and coarse of grains. (2) Shorting the filling
process to avoid slurry presolidified and induce a lack of fill.
(3) Runner should be smooth enough for filling and breaking
superficial oxide. (4) The temperature of mold has to be upto
150℃,but amang 150℃ and 200℃ , there are no significant
effect on filling behavior. (5) Thermal couple and temperature
transducer should be calibrated near working temperature. (6)
The components of the specimen approach A356 alloy, but melting
temperature were lower.
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