Nonstandard bell-type furnace

Abstract

The invention belongs to the technical field of heat treatment processing equipment and relates to a nonstandard bell-type furnace. The nonstandard bell-type furnace comprises a furnace base, a furnace bottom cross supporting frame and a furnace bell. The nonstandard bell-type furnace is characterized in that base heating elements are distributed on the furnace base, and a corrugated cover plate is covered on the heating elements; the side surface of the furnace base is provided with an air inlet; a double-layer sealing ring and a water cooled jacket are arranged between the furnace base and the furnace bell; the top of the furnace bell is provided with a convection fan and a U-type pressure gauge; and a corrugated inner cover air guide barrel is arranged in the furnace bell. The nonstandard bell-type furnace can meet the requirement of novel steel belts on mechanical performance after annealing, is particularly suitable for the annealing of steel belts of BSYE-N materials, fills the blank of the steel belt products in China and eliminates the technical bottleneck restricting the development of the technology. Compared with that of a traditional bell type furnace, the production cost of the nonstandard bell-type furnace is greatly reduced.

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. 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 is put on, the protective ga...

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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