Back up Roll

La description

Site color detection to support the roll body, the surface of the roll neck, to detect surface cracks defects; support rollers internal ultrasonic nondestructive testing, to detect internal cracks, inclusions and other defects, as well as cracks, inclusions flaw depth to determinewhether the amount of turning surfacing and roll.
Unilateral cut *0mm hardened layer processing into the welding groove-like, according to process requirements and to ensure that the design thickness of the surfacing layer. Full range of flaw detection, to confirm that the roller does not exist any defects after processing the roll surface and the welding groove. If you find a local there are still defects, along the circumferential direction in the defect site cutting to defect so far.
Roll into a special furnace preheating, preheating temperature of **0 ~ **0 ° C; furnace temperature is controlled by computer, and the warming should be slow (*0 to *0 ° C / h); in the heating process, the support roller should be kept slow rotation,to ensure uniform heating roller to achieve the set preheat temperature, holding a certain time, to ensure the temperature of the roller core to reach the required preheat temperature.