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...

Examples

Embodiment 1

[0031] Example 1 (see figure 1 shown)

[0032] Step 1. After straightening the 10#, Φ6.5mm wire rod, pass two sets of shelling wheels 22 perpendicular to each other to realize the horizontal peeling and longitudinal peeling treatment of the oxide scale on the steel wire surface;

[0033] Step 2. After the shelled steel wire passes through the steel brush, the remaining oxide skin on the surface of the steel wire can be completely removed;

[0034] Step 3. Rinse the surface of the peeled and peeled steel wire through the washing tank I 24 equipped with steel balls and connected to high-pressure water, and then enter the low-temperature electrolytic pickling tank 25 for activation. Activation is to pass the steel wire through a phosphoric acid solution with a concentration of 15% for 5-10 seconds. Then the steel wire enters the medium-low temperature phosphating tank 31 for pre-phosphating, the phosphating temperature is 45-55° C., and the time is 10-20 seconds. The surface ...

Embodiment 2

[0038] Step 1. After straightening the 55CrSi, Φ7.3 mm peeling and normalizing wire, pass two sets of peeling wheels 22 perpendicular to each other, and select the appropriate size of the peeling wheels 22 and the wrapping angle to realize the horizontal peeling and peeling of the oxide skin on the steel wire surface. Longitudinal peeling;

[0039] Step 2. After the shelled steel wire passes through the steel brush, the remaining oxide skin on the surface of the steel wire can be completely removed;

[0040]Step 3. Rinse the surface of the peeled and peeled steel wire through the washing tank I 24 equipped with steel balls and connected to high-pressure water, and then enter the low-temperature electrolytic pickling tank 25 for activation. Activation is to pass the steel wire through a phosphoric acid solution with a concentration of 15% for 5-10 seconds. Then the steel wire enters the medium-low temperature phosphating tank 31 for pre-phosphating, the phosphating temperature...

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...

Examples

Embodiment 1

[0031] Example 1 (see figure 1 shown)

[0032] Step 1. After straightening the 10#, Φ6.5mm wire rod, pass two sets of shelling wheels 22 perpendicular to each other to realize the horizontal peeling and longitudinal peeling treatment of the oxide scale on the steel wire surface;

[0033] Step 2. After the shelled steel wire passes through the steel brush, the remaining oxide skin on the surface of the steel wire can be completely removed;

[0034] Step 3. Rinse the surface of the peeled and peeled steel wire through the washing tank I 24 equipped with steel balls and connected to high-pressure water, and then enter the low-temperature electrolytic pickling tank 25 for activation. Activation is to pass the steel wire through a phosphoric acid solution with a concentration of 15% for 5-10 seconds. Then the steel wire enters the medium-low temperature phosphating tank 31 for pre-phosphating, the phosphating temperature is 45-55° C., and the time is 10-20 seconds. The surface ...

Embodiment 2

[0038] Step 1. After straightening the 55CrSi, Φ7.3 mm peeling and normalizing wire, pass two sets of peeling wheels 22 perpendicular to each other, and select the appropriate size of the peeling wheels 22 and the wrapping angle to realize the horizontal peeling and peeling of the oxide skin on the steel wire surface. Longitudinal peeling;

[0039] Step 2. After the shelled steel wire passes through the steel brush, the remaining oxide skin on the surface of the steel wire can be completely removed;

[0040]Step 3. Rinse the surface of the peeled and peeled steel wire through the washing tank I 24 equipped with steel balls and connected to high-pressure water, and then enter the low-temperature electrolytic pickling tank 25 for activation. Activation is to pass the steel wire through a phosphoric acid solution with a concentration of 15% for 5-10 seconds. Then the steel wire enters the medium-low temperature phosphating tank 31 for pre-phosphating, the phosphating temperature...

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