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Welding method of galvanized steel sheet

A technology of galvanized steel sheet and welding method, which is applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc., to achieve the effect of improving coating and porosity resistance

Active Publication Date: 2019-12-10
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, the conventional welding method of galvanized steel sheets has the following problems:

Method used

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  • Welding method of galvanized steel sheet
  • Welding method of galvanized steel sheet
  • Welding method of galvanized steel sheet

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Embodiment Construction

[0039] Hereinafter, a procedure for welding a galvanized steel sheet (hereinafter referred to as a welding method) according to the present invention will be described with reference to the drawings using the pulse welding device 1 . In addition, in the drawings, the plate thickness, the size and shape of the welding wire or the welding torch, the distance between members, and the like are sometimes exaggerated and schematically described for ease of understanding.

[0040] In this welding method, the welding device 1 is used, the pulse peak time is set according to the thickness of the galvanized steel sheet W, and pulse welding is performed using a welding wire and shielding gas. Here, solid wire YA is used as the welding wire, and Ar mixed gas (Ar-CO 2 Gas, Ar-O 2 Gas, Ar-CO 2 -O 2 Gas) is a shielding gas, and welding is performed by supplying a welding current, that is, a pulse current, to the solid welding wire to generate an arc between the solid welding wire YA and t...

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Abstract

The welding method of galvanized steel sheet (W) uses pulse welding in which pulse peak current (Ip) and base value current (Ib) are repeatedly applied, and CO is added to Ar at 1 mass % or more and 10 mass % or less. 2 or O 2 In the welding method of the galvanized steel sheet (W), the pulse peak time (Tp) of the pulse peak current (Ip) is set to 1 cycle according to the thickness of the galvanized steel sheet (W). within the given range.

Description

technical field [0001] The present invention relates to a welding method used in automobile parts and the like, and particularly relates to a welding method of a galvanized steel sheet for use in a part using a galvanized steel sheet, with emphasis on corrosion resistance. Background technique [0002] In general, galvanized steel sheets with high corrosion resistance are used for running part parts related to wheels as automobile parts and underbody parts of parts of the vehicle body facing the road surface. For example, galvanized steel sheets are used for suspension beams and suspension arms that are part of the running part of a car. In addition, the galvanized steel sheet used is often welded and coated after the welding. [0003] In the above-mentioned welding of galvanized steel sheets, zinc is evaporated by arc heat, but the zinc vapor generated at this time penetrates the molten metal or is partially taken into the molten metal to form pores (holes). The larger th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173B23K9/09B23K9/16B23K9/23B23K103/16
CPCB23K9/16B23K9/23B23K9/092B23K2101/34B23K2103/04B23K9/091B23K9/173B23K9/09B23K9/1006
Inventor 宫田实铃木励一
Owner KOBE STEEL LTD
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