Fe–Si–Al Coatings with Stable Wear Resistance Prepared by Laser Cladding Industrial Wastes

• Main Authors: Xue Liu, Bin-Bin Ma, Li-Wei Hu, Jin-Feng Li, Feng-Sheng Qu, Guo-Min Le, Xiu-Yan Li
• Format: Article
• Language: English
• Published: MDPI AG 2019-01-01
• Series: Metals
• Subjects: Fe–Si–Al coating; laser cladding; microstructure evolution; wear resistance; block-on-ring test
• Online Access: http://www.mdpi.com/2075-4701/9/1/96

Because wear is one of the most common reasons for the failure of metals, the development of a low-cost coating with enhanced wear resistance is of great importance. In the present study, Fe–Si–Al coatings with superior and stable wear resistance were prepared by laser cladding Fe–Si–Al industrial waste onto 1045 carbon steel. The microstructure, as well as the wear mechanism of the Fe–Si–Al coatings, was investigated. The Fe–Si–Al coatings consist of a (Al, Fe, Si) solid solution phase in both columnar grain form and equiaxed grain form. The Fe–Si–Al coatings possess enhanced microhardness of 494 ± 15 HV0.3 and low mass loss of 5 × 10−5 mg·(N·m)−1. The wear resistance is ten times higher than that of the 1045 carbon steel matrix. The wear of the Fe–Si–Al coatings is mainly dominated by abrasive wear and adhesive wear. This work provides important insight into the preparation of low-cost, wear-resistant coatings, as well as stable, superior wear resistance.