Double-layer sealing non-standard cover furnace

Abstract

The invention belongs to the technical field of heat treatment processing equipment, and relates to an improved non-standard heat treatment cover furnace with a double-layer sealing structure. The cover furnace mainly comprises a furnace base, a furnace base cross supporting frame and a furnace cover, and is characterized in that: a double-layer sealing ring is arranged between the furnace base and the furnace cover; and an inner layer of the double-layer sealing ring is an asbestos packing, and an outer layer of the double-layer sealing ring is a silicon rubber ring. The cover furnace can meet the requirement on the mechanical property of a novel steel strip after the novel steel strip is annealed, is particularly suitable for annealing a steel strip made from a BSYE-N material, fills in the blank of the steel strip product in China, and eliminates the technical bottleneck which restricts the development of the technology. Compared with the traditional cover furnace, the cover furnace has the advantage that: production cost 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 with a double-layer sealing structure. 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 protect...

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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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