Parameter optimization of debinding injection moulded Ti-6Al-4V mix with palm stearin and polyethylene
Debinding process of injection moulded Ti-6Al-4V feedstock was divided into two parts: solvent debinding process to eliminate palm stearin (PS) and thermal pyrolysis to eliminate polyethylene (PE). Solvent debinding process used heptane at optimum temperature, 60°C to remove PS binder completely...
| Main Authors: | , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/1260/ http://eprints.uthm.edu.my/1260/1/P12430_52fdd5dc2b3df4a313adb14d420759de.pdf |
| Summary: | Debinding process of injection moulded Ti-6Al-4V feedstock was divided into two parts:
solvent debinding process to eliminate palm stearin (PS) and thermal pyrolysis to eliminate
polyethylene (PE). Solvent debinding process used heptane at optimum temperature, 60°C to
remove PS binder completely as temperature is the only parameter that can be optimized. Thermal
pyrolysis parameters for removal of PE binder from the injected 65vol% Ti-6Al-4V feedstock have
been optimized by using Taguchi method. Heating rate, temperature and time were the selected
factors during experiment to be applied in the L9(34) Taguchi orthogonal array (OA) to find the best
set of parameters to produce highest density of brown part. Thermal pyrolysis process was done at
optimum parameters: heating rate: 5°C/min; temperature: 510°C; and time: 90 minutes. Analysis of
Variance (ANOVA) was employed to find the best signal to noise ratio (S/N) to express the
contribution of the factors towards quality characteristic. Based on the results, heating rate has the
greatest contribution (54.63%), followed by duration time of thermal pyrolysis (24.40%) and
temperature (19.25%). |
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