Development of removal technique of diamond films for reuse of WC-Co alloy tools

点击翻译按钮获取中文摘要

Diamond coated WC-Co alloy tools are used for the drilling of carbon fiber reinforced plastics. To realize the reuse of the tool, it is necessary to establish a technique to remove worn diamond film coated. Then, a technique with high density atmospheric plasma torch system is developed to remove the film. The system can produce output power of 1.2 kW stably for more than 1 hours continuously under 2.54 GHz microwave. It is proved that the system can remove the film efficiently by the addition of oxygen gas to Ar plasma. It was found that the technique can also be applied, by controlling plasma conditions, to the removing of polycrystalline diamond film without selective etching of crystal boundaries and/or crystal orientation dependence.