Bottom heating non-standard bell-type furnace

Abstract

The invention belongs to the technical field of heat treatment processing equipment and relates to an improved non-standard heat treatment bell-type furnace with bottom heating devices. The bell-type furnace comprises a furnace base, a furnace bottom cross supporting frame and a furnace cover and is characterized in that base heating elements are distributed on the furnace base; a corrugated cover plate covers the heating elements; an air inlet is arranged on the side of the furnace base; a double-layer seal ring and a water cooling jacket are arranged between the furnace base and the furnace cover; a convection fan and a U-shaped pressure gauge are arranged at the top of the furnace cover; and a corrugated inner cover air guide barrel is arranged in the furnace cover. The bell-type furnace has the following beneficial effects: the bell-type furnace can meet the requirements on the mechanical performances of the novel steel belts after annealing, is especially suitable for annealing the steel belts made of BSYE-N material, fills in the blank of the steel belt product in China and breaks through the technical bottleneck restricting the development of the technology; and the production cost is greatly lowered by adopting the bell-type furnace compared with the cost by adopting the traditional bell-type furnaces.

Description

technical field [0001] The invention belongs to the technical field of heat treatment processing equipment, and relates to an improved non-standard heat treatment bell furnace with a bottom heating device. Background technique [0002] Material annealing mainly has two basic functions, one is to eliminate the hardening and residual stress generated during processing, soften the material, improve plasticity, and facilitate further processing; the other is to change the structure of the material to obtain the required grain size and grain size. Orientation. Bell furnace annealing is one of the main technologies for heat treatment of cold-rolled steel. It is to stack several coils of steel into stacks, cover them with a protective cover, heat them up, reach the specified annealing temperature, and then cool after heat preservation. [0003] Generally, the annealing of the bell furnace adopts the single-stack or multi-stack type. After the steel is stacked, the protective cover...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the existing steel bell furnace annealing are: the bell furnace is heated or cooled separately during the annealing process, and the heat cannot be recycled, resulting in a waste of energy; the use of the heating hood to indirectly heat the steel in the protective hood results in low heat transfer efficiency , easy to cause steel sticking; frequent cover changes, high operating costs, high labor intensity, and poor safety

However, its use cost is too high to meet the production capacity requirements, especially for the steel strip of BSYE-N material, after annealing, its mechanical properties cannot meet the requirements, and the product will crack after welding

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