Manufacturing method of roller

Abstract

The invention discloses a manufacturing method of a roller. A roller ring of the roller is cast at twice through a centrifugal casting method. The alloy content of an outer-layer material of the roller is higher than that of an inner-layer material of the roller. A roller core of the roller is manufactured through a forging method. The roller core and an inner hole of the roller ring are combinedinto a whole through interference fit. The manufacturing method of the roller comprises the steps of centrifugal compound casting of the roller ring, forging of the roller core, heat treatment of theroller ring and combination of the roller core and the roller ring. According to the roller produced by the manufacturing method, the outer layer of the roller ring is high in alloy content and high in hardness, the inner layer of the roller ring is low in alloy content and simple in heat treatment, the roller core is manufactured through the forging method and suitable for large-batch production,heat treatment is separately carried out after casting of the roller ring is completed, the technology is simple, the effect is better compared with overall heat treatment, the roller core is fixed in the roller ring through interference fit after manufacturing is completed, the roller ring can be separately replaced after being abraded, and the cost is saved. In the using process of the roller manufactured through the manufacturing method, the roller face is not likely to produce cracks, the rolled steel plate edge is good in quality, and the rolling period of the roller is long.

Description

technical field [0001] The invention belongs to the field of steel rolling manufacturing, and in particular relates to a manufacturing method of a rolling roll. Background technique [0002] At present, the vertical rolls of hot rolling mills generally use cast steel materials such as integral cast semi-steel, graphite steel and low-alloy cast steel at home and abroad. When the current casting process and heat treatment process are mature, alloying treatment is the key to improving the performance of cast steel materials. The only way, but due to the limitation of the overall casting method, the alloying process needs to alloy the entire roll, and the increased cost and increased casting difficulty are difficult problems for the overall casting. Therefore, the current cast steel vertical roll alloy content The hardness of the roll is low, the cracks on the roll surface are serious during use, and the quality of the edge of the steel plate is poor. The rolling cycle of the ve...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a manufacturing method of rolls, which solves the problems of low alloy content and low hardness of rolls by integral casting, and at the same time provides an economically feasible manufacturing method for the production of rolls