Forging method of roller

Abstract

The invention discloses a forging method of a roller. The method comprises the following steps that a steel ingot is pressed into a cuboid steel ingot, a riser and a water gap are removed, the proportion of the length, the width and the height of the pressed steel ingot is 3:1.5:1, the steel ingot is extruded from two sides in the length direction, the length of the steel ingot is flattened to thehalf of the original length, the face in the width direction of the steel ingot and the face in the height direction of the steel ingot are both in arc shapes, the steel ingot is forged, after one face is forged each time, rotation is carried out by 90 degrees, the next face continues to be forged, and the steel ingot is forged to be formed. The method has the following beneficial effects that only a one-time upsetting process needs to be carried out, therefore, the whole machining consumed time can be reduced, the surface cracking phenomenon can be reduced, the production efficiency can be effectively improved, production cost is reduced, and the product quality can be improved.

Description

technical field [0001] The invention relates to the field of forging, in particular to a forging method of rolls. Background technique [0002] Cr5 material cold rolling rolls are widely used in large and medium-sized rolling mills at present. The quality of the material rolls directly determines the rolling efficiency and product quality. In addition to power frequency quenching, low-temperature ordinary forging is generally used in the forging process. This forging method breaks the coarse as-cast structure by upsetting and elongating. However, because of the high carbon content of the Cr5 cold roll, the Cr content reaches 5%. , the forgeability is poor, and the low-temperature large-deformation forging method requires a forging ratio > 5 to effectively break down carbides. Therefore, in actual forging, two times of upsetting and drawing are required, and surface cracking often occurs and it is scrapped. Contents of the invention [0003] Aiming at the above problems...

AI Technical Summary

Problems solved by technology

[0002] Cr5 material cold rolling rolls are widely used in large and medium-sized rolling mills at present. The quality of the material rolls directly determines the rolling efficiency and product quality. In order to improve the fatigue resistance and wear resistance of the material, currently electroslag In addition to power frequency quenching, low-temperature ordinary forging is generally used in the forging process. This forging method breaks the coarse as-cast structure by upsetting and elongating. However, because of the high carbon content of the Cr5 cold roll, the Cr content reaches 5%. , the forgeability is poor, and the low-temperature large-deformation forging method requires a forging ratio > 5 to effectively break down carbides. Therefore, in actual forging, two times of upsetting and drawing are required, and surface cracking often occurs and it is scrapped.

Images