비등방성 로킹을 위한 금속의 하이브리드 마이크로 텍스쳐링 가공법

Abstract

In this paper, a novel hybrid micro texturing method that combines laser beam machining and electrochemical etching was suggested. In this new machining process, tungsten anisotropic micro channel that was used for directional locking was fabricated. First, laser beam machining on a tungsten workpiece with tilted condition was adopted to rough texturing. Subsequently, a recast layer with tungsten oxide was generated that covered the original anisotropic channel shape, causing a low surface quality. For this reason, electrochemical etching was carried out to elute the recast layer into electrolyte. Moreover, EDS analysis that observed the atomic distribution of textured micro channel was performed to verify the principle of the suggested hybrid process. In the finally fabricated anisotropic micro channel after the hybrid texturing process, the interlocking force (maximum 133.44 N, 5×5 mm²) was measured using the load cell.