A kind of furnace roll preparation method for annealing furnace

Abstract

The invention discloses a furnace roller used for an annealing furnace. The furnace roller comprises a steel roller core, a roller body made of a ceramic material, spindle heads made of a metal material and a carbon sleeve. The inside of the roller body is provided with a hole. The roller core is disposed in the hole in the roller body. The spindle heads are respectively disposed at the two ends of the roller body and fixed to the two ends of the roller body. The carbon sleeve sleeves the roller body. The carbon sleeve and the roller body are fixed through a ceramic connecting key. The invention also discloses a preparing method of the furnace roller used for the annealing furnace. The roller body and the connecting key are both made of the ceramic material, so that the furnace roller is low in expansion factor, and has characteristics of high-temperature resistance, wear resistance and no high-temperature deformation, are steadily stable in a high-temperature state and long in service lifetime, and can fully satisfy using requirements of production such as high-temperature thermal processing.

Description

technical field [0001] The invention relates to a furnace roll, and more particularly, to a method for preparing a furnace roll used in an annealing furnace. Background technique [0002] At present, the annealing furnace is an industrial furnace for heat treatment after strip rolling in the metallurgical industry, and the furnace roll is the key equipment. Furnace rolls generally need to be rotated continuously for a long time under the condition of 800-1200°C to meet the transmission requirements of the strip. Therefore, the furnace roll needs to have the requirements of oxidation resistance, high temperature resistance and high temperature deformation resistance, and the structure of the furnace roll is reasonable, and abnormal fracture cannot occur. For example, furnace rolls for heat treatment of cold-rolled silicon steel sheets can be used at a temperature of up to 1200 ° C to meet the process requirements of silicon steel production. It can be used for a long time, ...

AI Technical Summary

Problems solved by technology

This combination method, for the production of high-temperature materials, the use temperature of the furnace roller core is low, the service life is short, generally only 2-4 months, it is prone to bending, and defects such as transverse stripes appear on the surface of the strip, which is not conducive to continuous production. At present, only relying on the improvement of steel roll material has reached the limit level, and there is little room for improvement

[0003] At present, in view of the problem that the steel roll is prone to bending, domestic and foreign manufacturers mainly improve the material from the direction of improvement, in order to increase its service life

In addition, there are also manufacturers that make all-ceramic furnace rollers, but due to the difficulty in forming the overall structure, the yield is low, easy to damage, and the anti-nodulation performance at high temperatures is relatively poor.

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