High-speed steel working roll for hot rolled sheet steckel mill in iron works

Abstract

The invention discloses a high-speed steel working roll for a hot rolled sheet steckel mill in an iron works. Outer-layer chemical ingredients of the high-speed steel working roll include, by 100% of total mass, C 0.5-3.0%, Si 0.1-2.0%, Mn 0.1-3.0%, P <= 0.1%, S <= 0.03%, Ni 0.3-6.0%, Cr 0.3-8.0%, Mo 2.5-7.5%, V 3.0-8.5%, W 0.1-5.0%, Ti 0.2-2.0%, Mg <= 0.02%, graphite <= 0.2% and the balance Fe and inevitable impurities. The outer-layer chemical ingredients of the high-speed steel working roll are changed, accordingly the high-speed steel working roll for the hot rolled sheet steckel mill in the iron works can be higher that ICDP in hardness and can be almost the same as the ICDP in impact force resistance, products can be rolled to be thinner, and product slipping phenomena can be decreased. If a finish-rolling working roll of the steckel mill is replaced by the high-speed steel working roll for the hot rolled sheet steckel mill in the iron works, the abrasion amount of the roll is very low, the surface accuracy of the produced products is good, the online usage time of the roll is very long, the service life of the roll is prolonged, the roll changing times are decreased, and the productivity and production efficiency are greatly improved.

Description

Technical field: [0001] The invention belongs to the field of metallurgical roll manufacturing, and in particular relates to a high-speed steel work roll for a hot-rolled thin plate furnace coil rolling mill in an iron factory. Background technique: [0002] At the present stage, when the hot-rolled steel mill produces thin plates, the work rolls of the finishing stand mainly use high-chromium iron rolls or ICDP rolls. Their disadvantages are that the rolls need to be changed frequently because of the low wear resistance of the roll surface, and the work surface The amount of grinding is large, and the surface of the roller body is rough. [0003] When high-chromium ferrochrome or ICDP rolls are used for the finishing work rolls of the steckel mill, the surface of the roll body is rough, not wear-resistant, and wears heavily. However, if the high-speed steel roll produced by the existing high-speed steel technology is relatively large due to the impact force of the product ...

AI Technical Summary

Problems solved by technology

[0002] At the present stage, when the hot-rolled steel mill produces thin plates, the work rolls of the finishing stand mainly use high-chromium iron rolls or ICDP rolls. Their disadvantages are that the rolls need to be changed frequently because of the low wear resistance of the roll surface, and the work surface The amount of grinding is large, and the surface of the roller body is rough

[0003] When high-chromium ferrochrome or ICDP rolls are used for the finishing work rolls of the steckel mill, the surface of the roll body is rough, not wear-resistant, and wears a lot

However, if the high-speed steel roll produced by the existing high-speed steel technology is relatively large due to the impact of the product on the roll, and the high-speed steel roll has a high hardness, it is easy to produce cracks, which will eventually cause the roll to peel off