High chromium steel centrifugal roll ring and manufacturing method thereof

Abstract

The invention discloses a high chrome steel centrifugation roll collar and a manufacturing method thereof, and belongs to the technical field of machining and casting. The high chrome steel centrifugation roll collar comprises an outer layer and a core part, and the proportion of the outer layer to the core part is 1:2; and the outer layer comprises alloy compositions including, by weight, 0.80%-1.40% of C, 0.40%-1.00% of Si, 0.60%-1.20% of Mn, not larger than 0.03% of P, not larger than 0.03% of S, 8.00%-14.0% of Cr, 1.00%-3.00% of Mo, 0.50%-1.50% of Ni+V and the balance Fe and inevitable impurities. The high chrome steel centrifugation roll collar solves the technical problems that a composite casting roll collar is not enough in abrasive resistance, poor in rolled metal surface quality, poor in outer layer and core part interface combination, low in bonding intensity and the like in the using process, and the economic and feasible manufacturing method is provided for producing roll collars of large and small vertical rolls of a hot strip mill.

Description

technical field [0001] The invention relates to a roll ring and a manufacturing method thereof, in particular to a high-chromium steel roll ring suitable for large and small vertical rolls of a hot-strip mill and a manufacturing method thereof, belonging to the technical field of mechanical processing and casting. Background technique [0002] The vertical rolls of the hot strip tandem mill are mainly used for descaling and side rolling of the slab to obtain strips with uniform width and neat edges. [0003] At this stage, alloy cast steel and semi-steel are generally used for vertical rolls of hot-spot rolling mills. With the pursuit of high-quality plates in steel mills, ordinary alloy cast steel and semi-steel vertical rolls can no longer meet the needs of rolling line production. In terms of machine wear and enhanced roll surface quality retention, improved strip edge quality and mill efficiency, the production method of hot-strip mill vertical rolls has evolved from int...

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a high chromium steel centrifugal roll ring and its manufacturing method to solve the problem of insufficient wear resistance of the composite casting roll ring during use, poor surface quality of the rolled material, and interface bonding between the outer layer and the core. It provides an economical and feasible manufacturing method for the roll ring production of large and small vertical rolls in hot strip mills

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