Method for nonoxidizing heating thin steel plate and special heating furnace

Abstract

Disclosed is a non-oxidation heating method used for a thin steel plate as well as a special heating furnace, and the heating method is a method directly blowing high temperature inert gases to the thin steel plate for heating the thin steel plate. The special heating furnace comprises a furnace wall (1), a hearth (8), a furnace door (7), a belly pipe (4) for blowing the high temperature inert gases into the hearth (8), a pad iron (5) for placing the thin steel plate (6), and a flue (11); the flue (11) is disposed on the furnace wall (1) at the top part, and the flue (11) is communicated withthe hearth (8); and the pad iron (5) is arranged in the hearth (8). The method which directly blows the high temperature inert gases to the thin steel plate for heating the thin steel plate can ensure the uniform heating to the thin steel plate under the condition of non oxidation.

Description

technical field [0001] The invention relates to a metallurgical industrial furnace, in particular to a high-temperature heating method and a heating furnace for thin steel plates such as automobile steel plates. Background technique [0002] In the metallurgical industry, the heating furnace is used to heat the metal to the temperature of rolling to forging. The heating furnace includes continuous heating furnace and chamber heating furnace. In forging and rolling production, the steel billet is generally heated in the oxidizing atmosphere of the complete combustion flame, while the reduction flame of the incomplete combustion (that is, "self-protective atmosphere") is used to directly heat the metal, which can achieve the purpose of less oxidation. [0003] Various heating furnaces currently used in the metallurgical industry can basically meet the needs of production technically. However, for the process operation with very strict heating conditions, such as the heating p...

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Problems solved by technology

However, for the process operation with very strict heating conditions, such as the heating process for automobile steel plates (thin steel plates with a thickness of less than 5 mm) (heating temperature is 900 ° C, and the uniform heating of the thin steel plates is ensured), no matter what protective measures are used in the prior art , neither can guarantee that the heated thin steel plate will not be 100% oxidized

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