Life and flaw detection standards of cold rolling work rolls and cold rolling intermediate rolls
The main links in the manufacturing process of cold rolling work rolls and cold rolling intermediate rolls include smelting, forging, heat treatment, processing and inspection.
Cold rolling work rolls and cold rolling intermediate rolls must withstand great rolling stress during the working process. In addition, problems such as welding seams, inclusions, and edge cracks in the rolled parts can easily lead to instantaneous high temperatures, causing the work rolls to be subject to strong thermal shock. Cause cracks, roll sticking, peeling or even scrapping. Therefore, cold rolling work rolls and cold rolling intermediate rolls must have the ability to resist cracking and spalling caused by bending stress, torsion stress, and shear stress. They must also have high wear resistance, high contact fatigue strength, and high Fracture toughness and thermal shock strength, etc. Therefore, how to improve the service life of rolls has always been a major issue faced by the roll manufacturing industry.