A control method for decarburization of fine-gauge heat-treated steel wire

Abstract

The invention discloses a method for controlling decarburization of a fine heat-treated steel wire. The method comprises the following steps of 1, removing excess soap powder on the surface of a fine steel wire by a cleaning ball, 2, feeding the fine steel wire into an open fire furnace after full drying, and 3, carrying out recarburization by an electroplating technology and setting of an inside atmosphere of the open fire furnace so that recarburization effects are obtained.

Description

technical field [0001] The invention relates to a method for controlling the decarburization of fine-scale heat-treated steel wires. Background technique [0002] The definition of decarburization: when the steel wire is heated, the carbon dissolved in the austenitic carbon on the surface of the steel wire or the carbon in the cementite is combined with oxygen and separated from the surface of the steel wire, that is, the carbon on the surface of the steel wire is burned. The chemical reaction formula is as follows: [0003] 2C+O ２ =2CO [0004] C +CO 2 =2CO [0005] C+H ２ O=CO+H ２ [0006] C+H ２ =CH 4 [0007] The decarburization layer of the steel wire includes two parts: the combined decarburization layer and the partial decarburization layer (transition layer). The partial decarburization layer refers to the tissue where the carbon content of the steel is normal after the full decarburization layer. In the case of not serious decarburization, sometimes ...

AI Technical Summary

Problems solved by technology

Due to the small size of the steel wire and the fast wire speed, the steel wire cannot effectively remove too much soap powder on the surface of the steel wire in the degreasing tank, which will cause the steel wire to be heated too quickly in the first zone of the furnace, thereby increasing the risk of decarburization

The original method is to directly use cold air to blow off the water on the surface of the steel wire. The water on the surface of the steel wire cannot be completely dried, and the water will continue to be brought into the furnace. The medium with the strongest decarburization ability is H 2 O (steam), H 2 O (steam) will react directly with carbon to produce CO and H 2 , will cause the atmosphere in the first zone to be reductive, resulting in changes in the pressure in the entire furnace, resulting in changes in the atmosphere in the entire furnace, and further increasing the risk of decarburization. The specific reaction chemistry is as follows: C （γ-Fe） +H 2 O=CO+H 2 , Fe 3 C+H 2 O=3Fe+CO+H 2

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