A review of metal injection moulding on WC-Co cemented carbide comprised of Grain Growth Inhibitors (GGI)
This paper aims to provide a summary of metal injection moulding technologies utilising cemented WC�Co carbides comprised of grain growth inhibitors (GGI). The advanced manufacturing of metal injection moulding (MIM) has the ability to produce cement nanostructured carbides. In addition, the natur...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit UTHM
2022
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/7611/1/J14465_9ead86b37968e6795c726527e1250782.pdf http://eprints.uthm.edu.my/7611/ https://doi.org/10.30880/ijie.2022.14.01.009 |
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| Summary: | This paper aims to provide a summary of metal injection moulding technologies utilising cemented WC�Co carbides comprised of grain growth inhibitors (GGI). The advanced manufacturing of metal injection moulding
(MIM) has the ability to produce cement nanostructured carbides. In addition, the nature of the feedstock plays a
crucial role when manufacturing a defect-free component at each point of the MIM phase, thus the interactions
between the metal powder and the binder combining, moulding, and debinding are important to be recognised. The
primary objective of this analysis is to investigate the characterization of feedstock to form a homogenous mixture.
There are five criteria to classify features of the feedstock which include powder characteristics, binder
composition, powder content ratio, mixing cycle, and approaches to palletization. Not only that, the feedstock must
meet specific criteria; higher powder loading with excellent flowability by the rheological approaches. The second
goal of the research is to re-evaluate feedstock’s flow properties in relation to rheological activity in terms of index
flow behaviour (n), activation energy (E), and mouldability (α). MIM practitioners have continued to underestimate
erratic product quality, including inadequate regulation, distortion, and internal and external defects. These defects
can arise in the early processing phases, but often occur only after sintering or debinding. The approaches are also
challenging to provide. This chapter includes a description of MIM defects. Explanations are listed and
recommendations are provided for these defects. |
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