The roll substrates are made of high-quality materials including carbon steel, stainless steel and alloy steel, and processed through a series of procedures such as forging, quenching and tempering, precision turning and non-destructive testing. This ensures the substrates possess excellent strength, rigidity and dimensional accuracy. The roughness of the coating bonding surface is strictly controlled within the designed range to provide stable and reliable adhesion support for the coatings. The core coating systems can be tailored to meet diverse working condition requirements: **WC-Co and Cr₃C₂-NiCr cemented carbide coatings** feature a density of ≥ 99.6%, a microhardness of ≥ HV1200 and a bonding strength of ≥ 60MPa, suitable for severe wear conditions such as metallurgical rolling rolls and non-ferrous metal processing rolls, and can effectively resist rolling wear from metal billets and high-speed scouring from oxide scale; **Al₂O₃-TiO₂ and ZrO₂ ceramic coatings** boast outstanding high-temperature resistance, insulation and anti-adhesion performance, enabling long-term stable service in high-temperature environments above 800℃, ideal for scenarios like high-temperature roller tables in the building materials industry and dryer rolls in the papermaking industry, and can eliminate product defects caused by material adhesion to the roll surface; **nickel-based alloy and fluoroplastic composite coatings** exhibit excellent acid and alkali corrosion resistance, applicable to conveying rolls and pickling rolls in the chemical and electroplating industries, capable of withstanding sustained erosion from acid-alkali solutions and electroplating baths and preventing failures such as rust and pitting on the roll surface.

All coatings are precisely prepared with standardized process parameters. The thickness of ceramic coatings is uniformly controllable within the range of 50μm–500μm. The coating surface undergoes precision post-treatments such as grinding and polishing, with the surface roughness controlled at ≤ Ra0.2μm, which ensures the stable operation of rolls and guarantees the surface quality of processed workpieces. The product features prominent core competitive advantages: compared with traditional uncoated rolls, its wear-resistant service life is increased by 8–15 times, corrosion resistance is improved by 5–10 times, and thermal shock resistance and fatigue resistance are significantly enhanced. There is no risk of coating peeling or cracking under the conditions of repeated thermal cycling and alternating loads. Meanwhile, customized services are available. The diameter, length, coating material and thickness of rolls can be customized according to customer requirements to adapt to different specifications of production equipment. In addition, the business of coating repair for used rolls is also available, which greatly reduces the equipment procurement and operation costs of enterprises.

This product is widely used in numerous fields such as metallurgical hot rolling rolls and cold rolling backup rolls, papermaking dryer rolls and sizing rolls, printing coating rolls and embossing rolls, building materials ceramic roller tables and glass annealing rolls, non-ferrous metal aluminum foil rolling rolls and copper strip rolling rolls. It can effectively improve the operational stability of production lines, reduce unplanned downtime caused by roll failure, lower comprehensive production costs, and create significant economic benefits for customers. Backed by a professional thermal spraying technical team and a comprehensive testing system, each coating-protected roll is subject to a series of rigorous inspections before delivery, including coating adhesion testing, microhardness testing, wear resistance testing and dimensional accuracy testing, to ensure that product quality fully complies with industry standards and customer application requirements.

If you want to learn more product details, please contact Jiangxi Velavision.