This production line adopts energy-saving heating furnaces and heat treatment furnaces, with automatic control of hot rolling, pickling, and finishing. The combination of eddy current and ultrasonic testing is used online, achieving safety, green, efficient, and energy-saving from the process and equipment. The product has high dimensional and shape accuracy, smooth surface, and good corrosion resistance, and is widely used in mechanical processing, automotive manufacturing, aerospace, high-temperature and high-pressure transportation, petrochemical and other fields.