An online double phosphating method for steel wire and its continuous production equipment

Abstract

The invention provides an online double phosphating method for steel wires and continuous production equipment for the method. According to the method, a wire drawing machine is adopted to serve as a power source; the steel wires drawn by a pay-off device pass through shucking wheels which are mutually perpendicular, and then a steel brush is adopted to remove residual oxide scales on the surfaces of the steel wires; the steel wires are pickled and activated by phosphoric acid, then enter a medium and low temperature phosphating slot for prephosphating, and subsequently enters an electrolytic phosphating slot for phosphating; and the continuous production equipment consists of the pay-off device, a shucking and pickling device, a double phosphating device and a wire drawing and paying-off device. Compared with an original method for removing the oxide scale by pickling, a mechanical scale removing method adopted by the invention has the advantage that the pollution to the environment is greatly reduced; meanwhile, the invention adopts the double phosphating method, thereby reducing the amount of phosphated residues, shortening phosphating time, changing components and thickness of a phosphating film structure, meeting the demands of multiple products, improving multiple functions of a production line and greatly improving the utilization rate of equipment; and by adopting the wire drawing machine to take up, one-pass drawing is reduced, so that the production cost is further reduced.

Description

technical field [0001] The invention is applicable to the technical field of surface treatment of metal products, and in particular relates to a steel wire online double phosphating method and continuous production equipment thereof. Background technique [0002] Hot-rolled wire rods and heat-treated semi-finished steel wires have a layer of scale on their surfaces. These oxide scales have high hardness and poor plasticity, and will scratch the surface of the mold and steel wire during later drawing. Therefore, the oxide scale on the surface of the steel wire must be removed and coated with a suitable coating before drawing. Generally, enterprises adopt pickling and medium-high temperature phosphating treatment process, which will produce a large amount of acid wastewater, waste residue and waste gas, which not only causes serious pollution to the environment, but also costs more for environmental protection in the later stage. Contents of the invention [0003] The purpo...

AI Technical Summary

Problems solved by technology

These oxide scales have high hardness and poor plasticity, and will scratch the surface of the mold and steel wire during later drawing, so the oxide scale on the surface of the steel wire must be removed before drawing and coated with a suitable coating

Generally, enterprises adopt pickling and medium-high temperature phosphating treatment process, which will produce a large amount of acid waste water, waste residue and waste gas, which not only causes serious pollution to the environment, but also costs more for environmental protection in the later stage.

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