Horizontal type bell furnace

Abstract

The invention relates to a horizontal type bell furnace. The horizontal type bell furnace comprises an outer fixed cover, a movable end cover, a steel reel supporting sleeve, a translation mechanism, an air inlet, an air outlet and a heating mechanism, wherein one end of the outer fixed cover is sealed, an opening is formed in the other end of the outer fixed cover, and the opening direction is in the horizontal direction; the opening end of the outer fixed cover can be covered with the movable end cover, a hearth is defined by the covered movable end cover and the outer fixed cover, the steel reel supporting sleeve is in an annular shape, the axial direction of the steel reel supporting sleeve is the horizontal direction, openings are formed in the two ends of the steel reel supporting sleeve, a material cavity is defined by an inner ring to be used for containing a steel reel, the translation mechanism is used for driving the steel reel supporting sleeve to move horizontally to the outside of the hearth to carry out material assembling and disassembling or to the inside of the hearth, the air inlet and the air outlet are used for adjusting the atmosphere inside the hearth or carrying out cooling inside the hearth, and the heating mechanism is arranged at the end, close to the corresponding end face of the steel reel supporting sleeve, of the outer fixed cover and / or the movable end cover. The horizontal type furnace is adopted, heating is carried out on the end face of the steel reel by the heating mechanism, and the temperature gradient is formed in the width direction of a steel belt; and when oriented silicon steel is processed, secondary crystalline grains of the oriented silicon steel can be enlarged, so that the magnetic induction is enhanced, and the ion loss is lowered. Meanwhile, harmful deformation on the side of the steel belt is avoided, and the yield is improved.

Description

Technical field [0001] The invention relates to the technical field of heat treatment of metal materials, in particular to a horizontal bell-type furnace. Background technique [0002] At present, the bell-type furnaces used in production are all vertical. The steel coils are placed upright in the bell-type furnace. The axial direction of the steel coils is vertical, and the stacking generally exceeds 2 coils. Its advantage is that a single furnace has a large loading capacity and high heating efficiency; its disadvantage is that because the heat transfer is from the outside of the coil to the inside of the coil, the temperature difference between the upper and lower sides of the steel coil and the temperature difference between the inside and outside are large, and the lower edge of the steel coil is easy to be irreversible due to the load-bearing Deformed. [0003] For oriented silicon steel, if the secondary recrystallization during high temperature heat treatment grows from on...

AI Technical Summary

Problems solved by technology

However, the vertical bell furnace is not conducive to the secondary recrystallization of oriented silicon steel because the heat transfer is from the outside of the coil to the inside of the coil instead of heating from both ends of the steel coil.

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