Restoration of rolled equipment using composite materials

Abstract

In recent years, polymer materials with various adhesive compounds based on epoxy resins, polyesters, polyurethanes, polyacrylics, and others enriched with fine-dispersed metallic and other fillers have found wide application in various industrial sectors for equipment repair. These composite repair materials have excellent adhesive properties when applied to metal surfaces, and when combined with their high strength and the ability to transition from a plastic to a solid state without shrinkage in a short period of time, they provide a broad range of applications in solving repair problems. A technology for restoring the original dimensions of equipment parts using composite materials has been developed, eliminating the need for welding and milling. Numerous industrial tests have shown that composite materials allow solving a range of serious repair problems in rolling production, particularly on heavily loaded sheet rolling stands and blooming mills when restoring worn contact surfaces of this equipment. An original technology for the application of composite materials was developed at the Pryazovskyi State Technical University (Mariupol, Ukraine), which allowed for a unique repair operation at one of the metallurgical plants, involving the installation of a new blooming mill housing onto old worn plates with wear of up to 7 mm at certain points. These composite repair materials have excellent adhesion properties when applied to metal surfaces, which, in combination with their high strength and the ability to transition from a plastic to a solid state without shrinkage in a short period of time, provide a wide range of applications in solving repair problems. Additionally, there are cases of damage to certain types of machinery that are either impossible to repair using traditional methods or require significant material and time investments for restoration