| Summary: | 碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 94 === The output of artificial silk in Taiwan occupies the second highest place in the world. Spinneret is the key spare part in the manufacturing of artificial silk. Currently most spinneret is imported due to precision requirement. Since spinneret is consumable, it would be a great contribution to the textile industry if scrapped spinneret can be recycled by proper surface treatment.
In this study multiple-electrode mechanism is used. The electrode is Titanium and the substrate is SUS630. Surface coating and melting of electrode and substrate are conducted during the EDM process. The carbon iron is then separated from the mixture and blended into the coating layer. In order to reduce the experiment parameters and the number of measurements, we make use of single titanium electrode for the experiments and the subsequent analysis. The effects of TiC layer will be explored in order to find a set of better parameters about multiple-electrode coating for spinneret.
The polarity, peak current, pulse width and the flow-state concentration are the parameters examined in the experiment. The parameters are varied to investigate the effect on the EDC TiC layer. This study is focused on the analysis and discussion of the wear resistance of electrode, surface roughness, hardness, component and thickness of the layer.
It is found that hardness is highest with negative polarity. If electrical discharge lasts longer, it would result in maximum layer width. Excellent surface is achieved when the current decreases. A stable flow field is helpful to the forming of storey.
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