[PDF] PROCESS IMPROVEMENTS ON ROD MILLS | Semantic Scholar
In a modem high-speed rolling mill, where steel temperature exceeds 1,000°C (1,800°F), production speeds surpass 100 m/s (20,000 fpm) and coils can be 10 km (6 miles) long, it is impossible to visually inspect the entire surface of any coil for defects. This is especially true when the defect in question is a seam—a tightly rolled discontinuity in the rod surface that is typically ...