Current status and development trend of laser remanufacturing of short stress path rolling mill

Abstract

The short-stress-path rolling mill is a mechatronics equipment which is widely used in the steel manufacturing industry. China has the largest number of used rolling mills in the world. Most of the rolling mills are served under the harsh environment of high temperature, high humidity and fretting wear, which leads to the decrease of rolling mill system accuracy and failure scrap. At the same time, the rolling mills in the scrapped state occupy a large amount of storage spaces and site resources of the factories. Furthermore, the natural corrosion of the idle rolling mill will cause serious environmental pollution. Laser remanufacturing is a new type of technology for high-efficiency green rolling mill repairing and remanufacturing. The main failure modes of short-stress-path rolling mills and the application of laser remanufacturing technology on short-stress-path rolling mills were summarized in this paper. From the aspects of mill condition analysis, failure mechanism and material design, the main problems in laser remanufacturing of short-stress-path rolling mill and related research work and latest developments on these issues were reviewed. On this basis, it was pointed out that the main development direction in the future is to design special materials for laser remanufacturing of rolling mill, develop real-time monitoring and feedback system for laser remanufacturing process, and establish evaluation standards for service performance of rolling mill after laser remanufacturing, and to expand the field of laser remanufacturing of rolling mill.

Keywords

• short-stress-path rolling mill
• laser remanufacturing
• failure analysis
• material design
• fret-ting wear