Abstract
The oxide scale formed on low carbon steel during hot rolling process is removed with high pressure water jets in its production process. Some researchers reported that the adhesive strength of the oxide scale was depended on structure of the scale and chemical composition in substrate. However, those quantitative adhesive strengths are still unclear. This study aims to quantitatively estimate the effect of Mn content and heat treatment processes on adhesive strength of the oxide scale on carbon steel with a laser spallation technique. Maximum estimated adhesive strength for the samples in this study was about 50 MPa. The adhesive strength tended to decrease with increasing Mn content. At temperature of 400℃, the strength for the samples without the structure change decreased by 10 MPa. The strength for some samples at 400 ℃ showed higher due to change in scale structure. In all samples, it was confirmed that the strength was depended on the structure of the scale.
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