Innovative Research and Practice on Electroslag Process Technology for High Quality Forged Steel for Cold Rolling Roller Application

High quality forged steel for cold rolling roller plays a crucial role in improving the quality of cold-rolled sheets and enhancing production efficiency. Improving the innovation of electric slag process technology for cold rolling roller is of great significance for enhancing the metallurgical quality of high-quality forged steel for cold rolling roller. In depth research and analysis of the electric slag process technology， with a focus on analyzing the shallow flat metal melt pool and solidification homogenization of electric slag remelting. Three aspects of electric slag process technology innovation research were determined： slag temperature compensation melting rate， rapid cooling with chilled water supplementation， and strengthening slag pool stirring with filling ratio. In the production practice， adding slag temperature compensation to the melting speed controls ， and the slag temperature slag temperature was controlled within the range of 1 580 ℃-1 680 ℃， which realized real-time performance of shallow flat metal melt pools at the micro level； The rapid cooling was optimized by supplementing the chilled water through Venturi fittings，and the cooling water temperature of the crystallizer reached a linear change of ±5 ℃， which ensured the consistency of the cooling effect at the bottom of the electric slag ingot and realized the stability of the shallow flat metal melt pool at the macroscopic level； The parameter of electric slag filling ratio was adjusted to 0.65 ± 0.05， which strengthened the stirring effect of metal droplets passing through the slag pool for refinement and homogenization， and achieved the metallurgical effect of electric slag solidification homogenization. The process of "slag temperature compensation+chilled water supplementation" was adopted to obtain a shallow flat metal melt pool. The filling ratio strengthened the slag pool stirring and improved the homogenization of electric slag solidification. After final product testing and use， the metallurgical quality of the cold rolling mill was significantly improved.