Mill Roll Thermal Spraying for Uniform Roughness and Coating Thickness

The patent applies dynamics by making the mill roll rotate during the thermal spraying process. The rotation speed and spray gun movement speed are dynamically coordinated to ensure uniform coating deposition. The spray gun moves parallel to the roll axis while the roll rotates, creating a controlled helical deposition pattern that distributes coating material uniformly across the surface, thereby maintaining both service life improvement and roughness uniformity.

The patent applies parameter changes by precisely controlling the roughness parameters through coordinated rotation and spray speeds. By optimizing the interaction between roll rotation speed and spray gun movement speed, the coating deposits with controlled roughness characteristics. This allows achieving the optimal friction coefficient range that provides sufficient grip on the strip while minimizing excessive roughness that would cause abrasion and contamination.

The patent uses dynamic coordination between roll rotation and spray gun movement to achieve uniform coating thickness. The synchronized motion ensures that coating material is deposited at a consistent rate across the entire roll surface, preventing localized thick deposits that could create defects. This dynamic approach allows achieving sufficient coating thickness for service life while maintaining uniformity and reliability.

The patent applies composite materials by depositing a coating consisting of hard particles (such as carbides) embedded in a metal matrix binder. This composite structure combines the high hardness of ceramic particles with the toughness and adhesion of the metal matrix. The resulting coating achieves superior service life compared to traditional chrome plating, as the hard particles provide wear resistance while the metal matrix ensures proper adhesion and shock absorption.