Development and application of high-speed tool steel rolls in hot strip rolling

The technical progress of steel rolling and the quality improvement of rolled steel products in recent years have imposed increasingly stringent quality requirements on steel rolling mill rolls. High-performance rolls, generally called high-speed tool steel rolls, were developed to meet these demands. The high-speed tool steel roll is manufactured as a compound roll, mainly by what is called the CPC process, and has a shell of high-speed tool steel. High-speed tool steel rolls are widely used on the finishing stands of hot strip mills, offering high wear resistance, surface roughening resistance, and toughness. They have greatly improved the quality of rolled products and significantly relaxed the rolling operation constraints on rolls. The techniques developed for the manufacture and use of the high-speed tool steel rolls and their performance evaluation and actual operation results are described.