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A kind of preparation method of zinc-aluminum-magnesium coated plate and welding method thereof

A welding method and zinc-aluminum-magnesium technology are applied in the field of metallurgical welding, which can solve the problems of poor welding performance and poor welding seam quality of zinc-aluminum-magnesium coated plates, and achieve good surface quality, excellent corrosion resistance, and good shear resistance. Effect

Active Publication Date: 2022-07-22
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the welding performance of the existing zinc-aluminum-magnesium coated boards is poor, and the weld quality between the zinc-aluminum-magnesium coated boards is poor

Method used

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  • A kind of preparation method of zinc-aluminum-magnesium coated plate and welding method thereof
  • A kind of preparation method of zinc-aluminum-magnesium coated plate and welding method thereof
  • A kind of preparation method of zinc-aluminum-magnesium coated plate and welding method thereof

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Effect test

Embodiment 1

[0042] Zinc-aluminum-magnesium coating weight 60g / m 2 , The chemical composition mass ratio of zinc-aluminum-magnesium coating is Al: 15%, Mg: 2.1%, lanthanum + cerium is 0.32%, and the rest is zinc and inevitable impurities. In the lye tank, NaOH+Na 2 SiO 3 is 20%, the surfactant is 5%, and the rest is water. The warpage of the test plate to be welded is 5°. The welding current was 7.0kA, the welding time was 0.4s, and the electrode pressure was 3.0kN. The obtained spot weld nugget diameter was 4.8mm, and the shear force was 5.6kN. The failure mode of the spot weld joint was nugget peeling.

Embodiment 2

[0044] Zinc-aluminum-magnesium coating weight 80g / m 2 , The chemical composition mass ratio of zinc-aluminum-magnesium coating is Al: 20%, Mg: 2.4%, lanthanum + cerium is 0.49%, and the rest is zinc and inevitable impurities. In the lye tank, NaOH+Na 2 SiO 3 is 15%, the surfactant is 8%, and the rest is water. The warpage of the test plate to be welded is 6°. The welding current was 11.0kA, the welding time was 0.6s, and the electrode pressure was 5.0kN. The obtained spot welding nugget diameter was 5.5 mm, and the shear force was 7.1 kN. The failure mode of the spot welding joint was nugget peeling.

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Abstract

The invention relates to a preparation method of a zinc-aluminum-magnesium coated plate and a welding method thereof. The preparation method includes the steps of degreasing and cleaning a substrate, continuous annealing, hot dip plating, air knife purging, cooling, surface treatment and coiling; the degreasing and cleaning process includes degreasing treatment in an lye tank, and the mass percentage of components in the lye tank is 5≤NaOH+Na 2 SiO 3 ≤30%, surfactant ≤10%, the rest is water. The welding method includes steps a, preparing the base metal; b, cutting the material; c, preparing before welding, cleaning the welding surface, and coating powder metal in the middle of the welding test plate; d, adopting spot welding to form. The method can prepare a zinc-aluminum-magnesium coated plate with excellent welding performance, can guide users to use the coated plate scientifically, and the spot welding joint can be well integrated and has excellent mechanical properties. The invention solves the problems of poor welding performance of the existing zinc-aluminum-magnesium coated plates and poor quality of the welding seam between the zinc-aluminum-magnesium coated plates.

Description

technical field [0001] The invention relates to a preparation method of a zinc-aluminum-magnesium coated plate and a welding method thereof, belonging to the technical field of metallurgical welding. Background technique [0002] At present, hot-dip galvanized (GI) and hot-dip 55% Al-Zn alloy coated (GL) steel sheets, which are widely used in construction, automobile and home appliance manufacturing industries all over the world, are already "traditional" coated steel sheets. Users expect better R&D performance. Excellent coated steel sheet. Hot-dip Zn-Al-Mg alloy coated steel sheet is a new type of coated steel sheet that came into being. Zn-Al-Mg alloy coating attracted extensive attention abroad in the 1980s and became the focus of research in the field of hot-dip galvanizing and zinc alloy coating. From the research results of domestic and foreign counterparts, under the condition of the same level of Zn and Al content in the coating, the hot-dip Zn-Al-Mg alloy coated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C23G1/20B23K11/11B23K11/34C22C18/04
CPCC23G1/20C22C38/02C22C38/04C22C38/06C22C38/14C22C38/12C22C38/004C22C18/04B23K11/11B23K11/34
Inventor 周磊磊郭太雄董学强余腾义王敏莉宋裕
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD