Roll collar of furnace roller of roller hearth heating furnace

Abstract

The invention discloses a roll collar of a furnace roller of a roller hearth heating furnace, which is a ceramic-heat resistance steel composite roll collar. Compared with the prior art, the ceramic outer ring has good high-temperature strength, good thermal cracking resistance, high wear resistance, strong resistance to ferric oxide corrosion and no adhesion to the ferric oxide scale. The ceramic outer ring has high surface temperature, which is beneficial to eliminating the heating billet black mark and increasing the billet heating quality. Compared with the heat-resisting steel roll collar, the furnace roller provided with a ceramic composite roll collar has the advantages that the temperature difference between supply and return of cooling water is reduced by 20%, which shows that the thermal loss caused by the cooling water is reduced by 20%, and the energy-saving effect is evident; the ceramic composite roll collar has low manufacture cost, the cost of the CSP furnace roller manufactured by the metal-ceramic composite roll collar is reduced by 50% compared with the imported CSP(Cast Steel Plate) furnace roller.

Description

technical field [0001] The invention belongs to a roller ring of a roller hearth heating furnace roll, in particular to a roller ring of a roller hearth heating furnace roller of a thin slab continuous casting and rolling sheet production line (abbreviated as CSP). Background technique [0002] The roll rings of the furnace rolls of the roll bottom heating furnace of the thin slab continuous casting and rolling thin plate production line (referred to as CSP) are generally made of heat-resistant steel. This heat-resistant steel roll ring has the following problems during use: [0003] (1) The heat-resistant steel roll ring is often bonded with iron oxide scale at high temperature, causing damage to the lower surface of the slab and directly affecting the surface quality of the coil. [0004] (2) Due to the high thermal conductivity of heat-resistant steel and the direct exposure to high-temperature environments, the heat loss through the heat-resistant steel roll ring is lar...

AI Technical Summary

Problems solved by technology

[0003] (1) The heat-resistant steel roll ring is often bonded with iron oxide scale at high temperature, causing damage to the lower surface of the slab and directly affecting the surface quality of the coil

[0004] (2) Due to the high thermal conductivity of heat-resistant steel and direct exposure to high-temperature environments, the heat loss through the heat-resistant steel roll ring is large, which is not conducive to energy saving and the elimination of "black marks" on heated billets

[0005] (3) The heat-resistant steel roller ring will be gradually oxidized at high temperature, resulting in loose material structure, and finally lead to damage to the roller ring

[0006] (4) Since the strength of the heat-resistant steel is greatly reduced at high temperature, the roller ring gradually creeps under the dual action of the high temperature in the furnace and the heavy pressure of the billet, which eventually leads to damage to the roller ring

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