Leveler roll and manufacturing process thereof

Abstract

The invention relates to a straightening roll and the manufacturing process thereof, wherein, the composition of the roll includes 0.60wt percent to 1.10wt percent of C, 0.20wt percent to 1.0wt percent of Si, 0.20wt percent to 0.60wt percent of Mn, 0.20wt percent to 1.00wt percent of Ni, 4.00wt percent to 6.00wt percent of Cr, 0.20wt percent to 1.00wt percent of Mo, 0.10wt percent to 0.50wt percent of V, less than or equal to 0.02wt percent of P, less than or equal to 0.02wt percent of S and the rest, Fe and other inevitable impurities; the manufacturing process of the roll includes: electric furnace smelting to secondary refining to ingot casing to electrode rolling to electrode rough machining to electroslag remelting to ingot casing to hydrogen diffusion annealing to forging to conditioning treatment to ultrasonic flaw detection and microscopic and macroscopic test to rough machining to quenching and tempering heat treatment to semifinishing to final heat treatment to finish machining to finished product. The invention increases the service life of the straightening roll and the surface quality of strip steel and eliminates the bottleneck in straightening high strength plate during production.

Description

technical field [0001] The invention belongs to the field of metallurgical roll manufacturing, and in particular relates to a straightening roll for a strip multi-roll straightening machine and a manufacturing process thereof. Background technique [0002] The multi-roll leveler is the final production process of hot-rolled commercial products. It is not only necessary to ensure the dimensional accuracy and shape requirements of the strip, but also to ensure the surface quality of the strip without surface defects such as roll marks and scratches. It is necessary to improve the operation rate of the straightening machine, reduce frequent roll changes, and avoid uneven wear and damage on the roll surface. The straightening roll must have excellent wear resistance, scratch resistance and deformation resistance to ensure its use. Therefore, it is required that the surface material of the straightening roller has high hardness and uniform hardness, and the material of the roll b...

AI Technical Summary

Problems solved by technology

The idea of ​​these two processes is to improve the hardness of the straightening roller surface and at the same time ensure the strength and toughness of the roller body. There is no clear definition of the straightening roller material and the effect that can be achieved. It is difficult to ensure the uniformity of the hardness of the roller surface.

[0011] In summary, the current straightening rolls used in multi-roll leveling machines have poor wear resistance and scratch resistance, and short service life. It is of great significance to develop new types of straightening rolls with high wear resistance and scratch resistance.

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