Evaluation of Cutting Characterization in Plasma Cutting of Thick Steel Ship Plates

摘要

In this paper, we studied the characteristics of the plasma cutting for thick steel ship plate. In general, plasma cutting speed is faster than gas cutting speed. However, It is known that quality of plasma cutting is bad for thick plate 30 mm or more. And plasma cutting is difficult to cut steel plate for 50 mm or more. The purpose of this study was to find out the worsening cause of cutting quality for 30 mm or more thick plate cutting. This study observed the form of the cut and the metallic organization of cross section in the heat affected zone. We found that the flow of molten metal was influenced by the cutting conditions during plasma cutting through experiments. Also we were able to recognize the impact of the quality of the cut by the shape of the cut and HAZ depth.