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Twisted bar surface rust prevention method

A technology of threaded steel bar and surface temperature, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of fast rusting of steel bars, general anti-rust effect, and decline in the appearance quality of steel bars

Inactive Publication Date: 2013-02-13
LAIWU IRON & STEEL GRP
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Problems solved by technology

[0002] The production process of threaded steel bars, in addition to the ordinary hot rolling process of microalloying, can also be produced by controlled rolling and controlled cooling, ultra-fast cooling, waste heat treatment and other processes, whether it is controlled rolling and controlled cooling process, ultra-fast cooling process or waste heat treatment Due to the use of water penetration and cooling in the production process, the surface of the rolled steel cannot form the dense oxide scale in the ordinary hot-rolled state. Compared with the ordinary hot-rolled process, there is a certain gap in the surface quality of the steel bar. Rust quickly during use, and the appearance quality of steel bars deteriorates
Anti-rust treatment on the surface of threaded steel bars generally adopts the method of on-line spray anti-rust liquid and epoxy resin coating. The former has high cost and low spray adhesion rate. The application of steel bars before use cannot meet the application in the continuous production line of hot-rolled steel bars

Method used

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  • Twisted bar surface rust prevention method

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Embodiment Construction

[0009] In order to overcome the problems in the prior art, the invention provides a method for preventing rust on the surface of threaded steel bars. According to the antirust method for the surface of the threaded steel bar of the present invention, the surface of the threaded steel bar is treated with a steam bath to form a protective layer on the surface of the threaded steel bar, thereby obtaining a threaded steel bar with good surface gloss.

[0010] The principle adopted by the on-line antirust method for threaded steel bar of the present invention is that at high temperature, steam and iron undergo an oxidation-reduction reaction, so that the oxide scale generated on the surface of the threaded steel bar is formed of Fe 3 o 4 and Fe 2 o 3 Mainly, reduce the easily oxidizable substances produced by the decomposition of FeO, so that the easily oxidized and corroded substances in the air will be denatured at high temperature to form stable oxides, so as to achieve the pu...

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Abstract

The invention provides a twisted bar surface rust prevention method. The twisted bar is subjected to vapor bath treatment to generate a protective layer on the twisted bar surface. The twisted bar on-line rust prevention method can obtain the twisted bar with favorable surface gloss, and can satisfy the requirements for continuous production of twisted bars.

Description

technical field [0001] The present application relates to a method for preventing rust of threaded steel bars, more specifically, the present application relates to a method for preventing the surface of threaded steel bars from rusting through steam bath treatment. Background technique [0002] The production process of threaded steel bars, in addition to the ordinary hot rolling process of microalloying, can also be produced by controlled rolling and controlled cooling, ultra-fast cooling, waste heat treatment and other processes, whether it is controlled rolling and controlled cooling process, ultra-fast cooling process or waste heat treatment Due to the use of water penetration and cooling in the production process, the surface of the rolled steel cannot form the dense oxide scale in the ordinary hot-rolled state. Compared with the ordinary hot-rolled process, there is a certain gap in the surface quality of the steel bar. During use, the rust is faster and the appearanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/18
Inventor 杜传治梁辉孙道清郭琨刘艳林
Owner LAIWU IRON & STEEL GRP
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