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Coating for non-copper-plated seamless flux-cored wire, preparation method, and coating process

A seamless flux-cored welding wire, no copper plating technology, applied in conductive coatings, anti-corrosion coatings, coatings, etc., can solve the problems of poor adhesion between the copper-plated layer and the substrate, damage to the health of the operator, and wear of the contact tip. Achieve the effect of reducing the risk of corrosion, increasing the probability of breakdown, and strong adhesion

Active Publication Date: 2021-10-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the first object of the present invention is to provide coatings and preparation methods for copper-free seamless flux-cored welding wires. The coatings comprehensively consider the corrosion resistance, surface lubricity, wire feedability, Factors such as conductivity and the bonding force between the coating and the wire can solve the problem of poor bonding between the copper layer and the substrate of the traditional copper-plated solid wire, poor corrosion resistance, and the release of copper vapor during the welding process, which damages the health of the operator. ; and problems such as serious wear of the contact tip, weak bonding force and poor rust resistance when welding without copper-plated solid core wire

Method used

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  • Coating for non-copper-plated seamless flux-cored wire, preparation method, and coating process
  • Coating for non-copper-plated seamless flux-cored wire, preparation method, and coating process
  • Coating for non-copper-plated seamless flux-cored wire, preparation method, and coating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Coating for non-copper-plated seamless flux-cored wire includes the following components in parts by mass: 30 parts of low-crystalline polyvinyl formal; 10 parts of DW water-based polymer active solution; 20 parts of acetone solution; 70 parts of distilled water ; 3 parts of dispersant; 2 parts of flame retardant; 1 part of nano-nickel powder.

[0043] Among them, nano-nickel powder is spherical, with an average diameter of 50nm and a specific surface area of ​​23.2m 2 / g, the powder conductivity is 10000s / m.

[0044] The preparation method of the coating for non-copper-plated seamless flux-cored wire comprises the following steps:

[0045] (1) Add distilled water and acetone solution to the DW water-based polymer active solution, and stir at 55°C for 30 minutes to obtain A solution;

[0046] (2) Add low-crystalline polyvinyl formal into the acetone solution and fully stir until it is completely dissolved, then add the flame retardant, stir at 60°C for 1 hour and keep...

Embodiment 2

[0051] Coatings for copper-free seamless flux-cored wires include the following components in parts by mass: 40 parts of low-crystalline polyvinyl formal; 18 parts of DW water-based polymer active solution; 32 parts of acetone solution; 85 parts of distilled water ; 4 parts of dispersant; 3 parts of flame retardant; 2 parts of nano-nickel powder.

[0052] Among them, the nano-nickel powder is spherical, with an average diameter of 70nm.

[0053] Compared with Example 1, the preparation method of the coating for non-copper-plated seamless flux-cored wire in Example 2 differs in that: in step (1), stir at 65° C. for 30 min; in step (2), in Stir at 53° C. for 1 h and keep warm; in step (3), stir at 50° C. with a high-speed mixer at a speed of 13000 r / min for 40 min.

[0054] Compared with Example 1, the above-mentioned process of coating welding wire with paint in Example 2 is different in that: in the dip coating process, the temperature of the paint is controlled at 65°C; the ...

Embodiment 3

[0057] Coatings for copper-free seamless flux-cored wires include the following components in parts by mass: 36 parts of low-crystalline polyvinyl formal; 13 parts of DW water-based polymer active solution; 30 parts of acetone solution; 80 parts of distilled water ; 4 parts of dispersant; 2 parts of flame retardant; 1 part of nano-nickel powder.

[0058] Among them, the nano-nickel powder is spherical, with an average diameter of 90nm.

[0059] Compared with Example 1, the preparation method of the coating for non-copper-plated seamless flux-cored wire in Example 3 differs in that: in step (1), stir at 70° C. for 30 min; in step (3), then Distilled water was added to adjust the concentration to 35% of the concentration of the mixed solution, and then nano-nickel powder was added to the solution, and a high-speed stirrer was used to stir at a speed of 11000 r / min for 30 minutes at 65°C.

[0060] Compared with Example 1, the process of using the above-mentioned coating for weld...

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Abstract

The invention discloses a coating for a copper-free seamless flux-cored wire, a preparation method, and a coating process. The coating includes the following components: 30-40 parts of polyvinyl formal in a low crystalline state, 10-40 parts of DW water-based polymer active solution 20 parts, 20~30 parts of acetone solution, 70~80 parts of distilled water, 3~4 parts of dispersant, 2~4 parts of flame retardant, 1~2 parts of nano nickel powder. The preparation method of the coating is to first add distilled water and acetone solution to the DW water-based polymer active solution and stir evenly at 55~65°C; then add low-crystalline polyvinyl formal into the acetone solution and stir thoroughly, Stir the flame retardant at a high speed at 55~60°C; mix the two solutions, add a dispersant to the mixture, then add distilled water to adjust the concentration, then add nano-nickel powder, and stir evenly at 55~65°C, that is Get dope. Coating the coating on the surface of the welding wire can obtain copper-free seamless flux-cored welding wire. The coating has a strong bonding force with the welding wire, and the welding wire has comprehensive functions of conduction, lubrication and rust prevention.

Description

technical field [0001] The invention relates to the technical field of welding wire, in particular to a coating for a copper-free seamless flux-cored welding wire, a preparation method and a coating process. Background technique [0002] Although the market demand for traditional copper-plated welding wire and seamed flux-cored welding wire is huge, there are the following problems: the copper layer of traditional copper-coated welding wire has poor bonding force with the substrate, it is easy to peel off, and the wire guide tube is blocked, which affects the wire feeding performance. Copper vapor is released in the process, which will damage the health of the operator, and the welding spatter is large, and the discharge of waste liquid in the production process of copper-plated welding wire will also cause huge pollution to the environment. Seamed flux-cored welding wire has serious moisture absorption and poor anti-rust ability. It is difficult to guarantee its welding qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D129/14C09D5/10C09D5/24B05D7/14B05D7/24B05D3/02
CPCB05D3/0254B05D7/14B05D7/24C08K2003/0862C08K2201/001C08K2201/011C08L2201/04C09D5/10C09D5/24C09D129/14C09D7/67C09D7/70C08L101/00C08K13/04C08K7/18C08K3/08
Inventor 魏梦飞姚润钢亢天佑孔红雨朱官朋
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP