An induction heating cladding device and method for hot-dip galvanizing or zinc alloy of steel wire

Abstract

The present invention relates to an induction heating cladding device and method for hot-dip galvanizing or zinc alloy of steel wire, belonging to the technical field of metal material processing. The induction heating cladding device comprises an induction heating device, a pneumatic press and a mold, wherein a first channel is provided at the center of the mold, and a plurality of second channels are also provided in the mold, and the plurality of second channels are arranged circumferentially along the first channel, the pneumatic press is arranged at the entrance of the second channel, and the induction coil in the induction heating device is wound around the outer ring of the mold, and the end of the second channel is connected to the first channel. The steps of the method are as follows: 1. Select the particle size of the hot-dip material; 2. Adjust the pressure of the pneumatic press, and the ejected gas blows the hot-dip material into the cladding area; 3. Adjust the frequency of the induction heating device to clad the hot-dip material; 4. The zinc liquid is coated on the surface of the steel wire by the gas ejected by the pneumatic press. The present application can not only save energy, but also accurately control the thickness and uniformity of the zinc coating on the surface of the steel wire.

Description

Technical Field

[0001] The invention relates to an induction heating cladding device and method for hot-dip galvanizing of steel wire or zinc alloy, belonging to the technical field of metal material processing. Background Art

[0002] The main methods of galvanizing steel wire are cold galvanizing (also known as electrogalvanizing) and hot galvanizing. Cold galvanizing is to gradually coat the metal surface with zinc through unidirectional current in the electroplating tank. It has a slow production speed, uniform coating, thin thickness, usually only 3-15μm, poor corrosion resistance, and will generally rust in a few months. Hot-dip galvanizing is to immerse the steel wire in heated and molten zinc liquid for immersion plating. It has a fast production speed, thick but uneven coating, up to 300μm or more, and forms an infiltration layer with the base metal, which has good corrosion resistance. Therefore, hot-dip galvanizing is a better method for situations with high requirements for corrosion resistance.

[0003] However, in the hot-dip galvanizing process, the zinc ingots need to be kept in a molten state in the zinc bath, which consumes a lot of energy. At the same time, due to the limitations of the hot-dip galvanizing process, the controllability and uniformity of the zinc layer thickness are poor, and the subsequent process of the steel wire will cause a large loss of the zinc layer, resulting in a lot of waste. Therefore, a new hot-dip galvanizing or zinc alloy plating method is urgently needed to reduce energy consumption and control the coating thickness. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an induction heating cladding device and method for hot-dip galvanizing of steel wire or zinc alloy in accordance with the above-mentioned prior art, so as to effectively control the thickness of the zinc layer and ensure the uniformity of the hot-dip galvanizing layer on the surface of the steel wire; reduce operating energy consumption and reduce production costs.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is: an induction heating cladding device for hot-dip galvanizing or zinc alloy of steel wire, comprising an induction heating device, a pneumatic press and a mold, wherein a first channel for the steel wire to pass through is opened in the center of the mold, and a plurality of second channels for inputting hot-dip material are also arranged in the mold, and the plurality of second channels are arranged circumferentially along the first channel. The pneumatic press is arranged at the entrance of the second channel, and is used to blow the hot-dip material into the second channel. The induction coil in the induction heating device is wound around the outer ring of the mold, and is used to heat the hot-dip material to a molten state. The end of the second channel is connected to the first channel, and the molten hot-dip material is coated on the surface of the steel wire running in the first channel through the second channel.

[0006] The number of the second channels is >1.

[0007] The number of the second channels is 2 to 12.

[0008] The second channel is provided with a melting zone and a coating zone, wherein the melting zone is located at the front section of the second channel, and the coating zone is located behind the melting zone. The front end of the coating zone is connected with the end of the melting zone, and the end of the coating zone is connected with the first channel.

[0009] Above

[0010] A method for hot-dip galvanizing or zinc alloying of steel wire, the method comprising the following steps:

[0011] Step 1: Select the particle size of the hot-dip material;

[0012] Step 2: adjusting the pressure of the pneumatic press so that the gas ejected blows the hot-dip material into the melting areas of the plurality of second channels in the mold;

[0013] Step 3: Adjust the frequency of the induction heating equipment, and the induction coil melts the hot-dip material in the melting zone;

[0014] Step 4: The gas ejected by the pneumatic press blows the molten hot-dip material to the corresponding coating areas respectively, and the hot-melt zinc liquid in the multiple coating areas performs hot-dip coating on the surface of the steel wire passing through the first channel at a uniform speed from different angles.

[0015] The hot-dip material is zinc or zinc alloy particles.

[0016] The size of the hot-dip material is 0.1 um to 10 cm.

[0017] The size of the hot-dip material is 0.1 mm to 10 mm.

[0018] The pressure of the gas is 1Pa-10MPa.

[0019] The pressure of the gas is 0.01MPa to 1MPa.

[0020] Compared with the prior art, the advantages of the present invention are: an induction heating cladding device and method for hot-dip galvanizing or zinc alloy of steel wire, the induction heating cladding device is simple to manufacture and the process is controllable. The method of induction heating molten zinc powder is adopted to coat the zinc liquid on the surface of the steel wire under the action of gas pressure, and the coating thickness and uniformity are controlled by the powder feeding gas pressure, mold structure, process, etc. It can not only save energy, but also accurately control the thickness and uniformity of the zinc coating on the surface of the steel wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of an induction heating cladding device for hot-dip galvanizing or zinc alloy of steel wire according to an embodiment of the present invention;

[0022] In the figure, 1 is melting zone, 2 is coating zone, 3 is induction coil, 4 is mold, 5 is steel wire, and 6 is hot-dip material. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, in this embodiment, an induction heating cladding device for hot-dip galvanizing or zinc alloy of steel wire includes an induction heating device, a pneumatic press and a mold 4 made of ceramics. A first channel for the steel wire 5 to pass through is provided in the center of the mold 4. A plurality of second channels for inputting hot-dip materials are also provided in the mold 4. The second channels are arranged circumferentially along the first channel. A melting zone 1 and a coating zone 2 are respectively provided in each channel. The melting zone 1 is arranged at the front section of the second channel, the coating zone 2 is arranged behind the melting zone 1, the front end of the coating zone 2 is arranged at the end of the corresponding melting zone 1, and the ends of the coating zones 2 are respectively connected with the first channels. The pneumatic press is arranged at the entrance of the second channel 4, and the gas blown by the pneumatic press blows the hot-dip material 6 into the melting zone 1 of the plurality of second channels in the mold 4. The induction coil 3 in the induction heating device is wound around the outer ring of the mold 4. The hot-dip material 6 in the melting zone 1 is melted by setting the frequency of the induction heating device, and the molten hot-dip material is coated on the surface of the steel wire 5 running in the first channel through the coating zone 2.

[0025] The hot-dip material 6 is zinc or zinc alloy particles.

[0026] The method for hot-dip galvanizing or zinc alloying a steel wire using the above device comprises the following steps:

[0027] (1) Selecting the particle size of the hot-dip material 6, the size range is 0.1 mm to 10 mm;

[0028] (2) adjusting the pressure of the pneumatic press to 0.01 MPa to 1 MPa, and the ejected gas blows the hot-dip material 6 to the melting area 1 in the plurality of second channels in the mold 4;

[0029] (3) adjusting the frequency of the induction heating device according to the moving speed of the steel wire 5, the size of the hot-dip material 6, the flow rate of the hot-dip material 6 and the gas pressure, so that the induction coil 3 melts the hot-dip material 6 in the melting zone 1 of the second channel, so that the hot-dip material is in a liquid state;

[0030] (4) Finally, the gas ejected by the pneumatic press blows the molten hot-dip material 6 to the corresponding coating areas 2, and the hot-melt zinc liquid in the multiple coating areas 2 performs hot-dip galvanizing on the surface of the steel wire 5 passing through the first channel at a uniform speed from different angles, thereby completing the hot-dip galvanizing process of the steel wire 5.

[0031] The gas in the above-mentioned pneumatic press is selected as nitrogen or argon, which not only ensures the pressure for sending the hot-dip material 6 into the melting zone, but also serves as a protective gas for the induction heating melting process of the hot-dip material 6, and coats the molten hot-dip material 6 on the surface of the steel wire 5.

[0032] In this embodiment, there are two second channels in the mold 4, the hot-dip material 6 is zinc powder, the size of the zinc powder is 1-3mm, the gas is nitrogen, the pressure of the pneumatic press is set to 0.1MPa, the frequency range of the induction heating equipment is 30-100kHz, and the working frequency is set to 80kHz. The method of induction heating molten zinc powder is adopted, and the zinc liquid is coated on the surface of the steel wire 5 under the action of gas pressure, and the thickness and uniformity of the coating on the surface of the steel wire are controlled by the powder feeding gas pressure, mold structure, process, etc. Compared with the traditional steel wire hot-dip galvanizing process, it can not only save energy, but also accurately control the thickness and uniformity of the galvanized layer. The induction heating cladding device is simple to manufacture, the process is controllable, and it is convenient for large-scale promotion and application.

[0033] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A method for hot-dip galvanizing of steel wire or induction heating cladding of zinc alloy, characterized in that: The method is implemented based on an apparatus, the apparatus comprising an induction heating device, a pneumatic press and a mold (4), the mold (4) having a first channel provided at the center thereof for the steel wire (5) to pass through, the mold (4) also having a plurality of second channels provided inside thereof for the input of the hot-dip material (6), the plurality of second channels being arranged along the circumference of the first channel, the pneumatic press being arranged at the entrance of the second channel for blowing the hot-dip material (6) into the second channel, the induction coil (3) in the induction heating device being wound around the outer ring of the mold (4) for heating the hot-dip material (6) to a molten state, the end of the second channel being connected to the first channel, the molten hot-dip material (6) being coated onto the surface of the steel wire (5) running in the first channel through the second channel; The second channel is provided with a melting zone (1) and a coating zone (2), the melting zone (1) is located at the front section of the second channel, the coating zone (2) is located at the rear section of the melting zone (1), the front end of the coating zone (2) is connected to the end of the melting zone (1), and the end of the coating zone (2) is connected to the first channel; The hot-dip material (6) is zinc or zinc alloy particles; The method steps are as follows: Step 1: Selecting the particle size of the hot-dip material (6); Step 2: adjusting the pressure of the pneumatic press so that the ejected gas blows the hot-dip material (6) into the melting areas (1) of the plurality of second channels in the mold (4); the pressure of the gas is 1 Pa to 10 MPa; Step 3: adjusting the frequency of the induction heating device, so that the induction coil (3) heats and melts the hot-dip material (6) in the melting zone (1); the frequency range of the induction heating device is 30-100 kHz; Step 4: The molten hot-dip material (6) is blown to the corresponding coating areas (2) by the gas ejected by the pneumatic press, and the hot-melt zinc liquid in the multiple coating areas (2) performs hot-dip coating on the surface of the steel wire (5) passing through the first channel at a uniform speed from different angles; The gas in the pneumatic press is selected from nitrogen or argon.

2. The method of the induction heating cladding device for hot-dip galvanizing or zinc alloy of steel wire according to claim 1, characterized in that: The number of the second channels is greater than 1.

3. The method of the induction heating cladding device for hot-dip galvanizing or zinc alloy of steel wire according to claim 2, characterized in that: The number of the second channels is 2 to 12.

4. The method of the induction heating cladding device for hot-dip galvanizing or zinc alloy of steel wire according to claim 1, characterized in that: The size of the hot-dip material (6) is 0.1 um to 10 cm.

5. The method of the induction heating cladding device for hot-dip galvanizing or zinc alloy of steel wire according to claim 4, characterized in that: The size of the hot-dip material (6) is 0.1 mm to 10 mm.

6. The method of the induction heating cladding device for hot-dip galvanizing or zinc alloy of steel wire according to claim 1, characterized in that: The pressure of the gas is 0.01MPa to 1MPa.

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