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A kind of preparation method of mig welding wire for aluminum and aluminum alloy with fluorine-containing coating

A fluorine-containing coating, aluminum alloy technology, used in coatings, welding equipment, metal processing equipment, etc., can solve the problems of large number of pores and poor wire feeding performance

Active Publication Date: 2021-07-06
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of large number of internal pores and poor wire feeding performance in the deposited metal of aluminum and aluminum alloy MIG welding wires in the prior art, and to provide a MIG for aluminum and aluminum alloys with a fluorine-containing coating. Preparation method of welding wire

Method used

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  • A kind of preparation method of mig welding wire for aluminum and aluminum alloy with fluorine-containing coating
  • A kind of preparation method of mig welding wire for aluminum and aluminum alloy with fluorine-containing coating
  • A kind of preparation method of mig welding wire for aluminum and aluminum alloy with fluorine-containing coating

Examples

Experimental program
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Effect test

Embodiment 1

[0032]A preparation method for MIG welding wire for aluminum and aluminum alloys with a fluorine-containing coating, selecting the SAl4043 aluminum alloy wire rod in the Al-Si alloy with a diameter of 5.5 mm and drawing it to form a wire rod with a diameter of 1.2 mm After that, ultrasonic cleaning, degreasing, water washing once, alkali washing once, water washing twice, surface pretreatment, alkali washing twice, water washing three times, film forming, heat treatment, and then layer winding and packaging are carried out in sequence;

[0033] Ultrasonic cleaning: ultrasonic frequency is 40kHz, cleaning speed is 4m / s;

[0034] Degreasing: use lye Ⅰ, lye Ⅰ is NaOH and Na 2 CO 3 The mixed solution, the concentration of NaOH in the mixed solution is 20g / L, Na 2 CO 3 The concentration is 5g / L, and the degreasing temperature is 40°C;

[0035] Washing: use 40°C hot water to reversely rinse and wipe the surface of the wire for each washing;

[0036] Alkali cleaning: Alkali solu...

Embodiment 2

[0042] A preparation method for MIG welding wire for aluminum and aluminum alloys with a fluorine-containing coating, selects the SAl4043 aluminum alloy wire rod in the Al-Si alloy with a diameter of 6.0mm, and draws it to form a wire rod with a diameter of 1.2mm After the wire rod, ultrasonic cleaning, degreasing, first water washing, first alkali washing, second water washing, surface pretreatment, second alkali washing, three water washing, film forming, heat treatment, and then layer winding and packaging are carried out in sequence;

[0043] Ultrasonic cleaning: ultrasonic frequency is 40kHz, cleaning speed is 5m / s;

[0044] Degreasing: use lye Ⅰ, lye Ⅰ is NaOH and Na 2 CO 3 The mixed solution, the concentration of NaOH in the mixed solution is 18g / L, Na 2 CO 3 The concentration is 10g / L, and the degreasing temperature is 50°C;

[0045] Washing: use 40°C hot water to reversely rinse and wipe the surface of the wire for each washing;

[0046] Alkali cleaning: Alkali s...

Embodiment 3

[0052] A preparation method for MIG welding wire for aluminum and aluminum alloys with a fluorine-containing coating, using SAl in an Al-Mg alloy with a diameter of 5.5mm 5183 Aluminum alloy wire rod, and drawn to form a wire with a diameter of 1.4mm, followed by ultrasonic cleaning, degreasing, water washing once, alkali washing once, water washing twice, surface pretreatment, alkali washing twice, water washing three times, forming Film, heat treatment process, and then made by layer winding and packaging;

[0053] Ultrasonic cleaning: ultrasonic frequency is 40kHz, cleaning speed is 4m / s;

[0054] Degreasing: use lye Ⅰ, lye Ⅰ is NaOH and Na 2 CO 3 The mixed solution, the concentration of NaOH in the mixed solution is 15g / L, Na 2 CO 3 The concentration is 15g / L, and the degreasing temperature is 55°C;

[0055] Washing: use 40°C hot water to reversely rinse and wipe the surface of the wire for each washing;

[0056] Alkali cleaning: Alkali solution II is used for each a...

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Abstract

The invention relates to a preparation method of MIG welding wire for aluminum and aluminum alloys with a fluorine-containing coating. After the aluminum or aluminum alloy wire rod is drawn to form a wire with a diameter of 0.8-3.2 mm, the surface pretreatment, Alkali washing, water washing, film forming and heat treatment processes, and then layer winding; Among them, the surface pretreatment process includes pre-pretreatment and post-pretreatment, the surface state of the substrate is activated through the pre-pretreatment, so that the surface of the substrate is in an acidic state, and the post-pretreatment Pretreatment increases the surface roughness of aluminum and aluminum alloy wire rods, forms dense micropores, and improves the bonding force between the coating and the substrate; forms a fluorine-containing coating on the surface of aluminum and aluminum alloy wire rods through the film forming process. The preparation method of the MIG welding wire for aluminum and aluminum alloy with a fluorine-containing coating of the present invention can reduce the number of pores in the weld seam by more than 20%, and the average wire feeding resistance by more than 35%, and is especially suitable for robot automatic welding.

Description

technical field [0001] The invention belongs to the technical field of welding wire manufacturing, and relates to a preparation method of a MIG welding wire for aluminum and aluminum alloys with a fluorine-containing coating. Background technique [0002] With the popularization of the "lightweight" concept in the automobile manufacturing industry and the vigorous promotion of new energy vehicles, aluminum alloy has become one of the substitutes for steel raw materials in the automobile manufacturing industry due to its advantages of high strength, low density and corrosion resistance. All-aluminum body-in-white The fuel consumption per kilometer of the final assembly car has been proved to be significantly lower than that of the traditional steel body-in-white car, but there are still a series of problems in the MIG welding of aluminum alloy. Due to the large difference in the solubility of hydrogen in the liquid and solid phases of aluminum and aluminum alloys, hydrogen po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/16B23K35/28B23K35/40C09D7/61C09D7/63C09D127/18C25D7/06C25D11/08
CPCB23K35/286B23K35/404C09D127/18C25D7/0607C25D11/08C25D11/16C09D7/61C09D7/63C08K3/36C08K5/544
Inventor 张天理陈毓于航王伟光陈浩欣武雯
Owner SHANGHAI UNIV OF ENG SCI
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