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The source and negative effects of macro-inclusions in Ti-IF steel were studied by sliming extraction, ultrasonic detection, depth corrosion and SEM/EDS. High SiO2 content inclusions, and Al2O3 and MgO·xCaO inclusions were observed after sliming. Ultrasonic results showed that defects in the surfboard with sizes 0.5 mm-3 mm were mainly distributed in the inner arc and outer arc sides close to 1/8...
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