Laser Cladding Strengthening Test on the Surface of Flatness Rollers

Abstract

Contact-type flatness meters are the key detection equipment in the production of highend cold-rolled thin strips. The surface performance of a flatness meter roller is very important to improve its service life and ensure the surface quality of strip products. To improve the surface wear resistance and prolong the service life of a seamless flatness meter roller, it was subjected to a surface strengthening treatment by laser cladding an Fe-based wear-resistant alloy. The performance of the flatness meter roller strengthened by laser cladding and quenching was determined by tests.The results show that the laser cladding-strengthened layer forms a solid metallurgical bond with the roller matrix. When the laser cladding-strengthened surface meets the surface strength, hardness and thickness requirements of the cladding-strengthened layer, the average width of wear marks in the 30-minute sliding friction wear test is only 1.43 mm. The wear resistance of the claddingstrengthened layer is approximately 24% higher than that of the quenching-strengthened layer. This paper proposes a new approach for the research and development of the surface strengthening technology of cold-rolled strip seamless flatness meter rollers.