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Method for welding zinc plated steel plate

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

Active Publication Date: 2018-03-27
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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  • Method for welding zinc plated steel plate
  • Method for welding zinc plated steel plate
  • Method for welding zinc plated steel plate

Examples

Experimental program
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Embodiment Construction

[0040] 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.

[0041] 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

Provided is a welding method for a zinc plated steel plate (W) that uses pulse welding in which a pulse peak current (Ip) and a base current (Ib) are repeatedly applied and uses a shielding gas in which CO2 or O2 is added to Ar at 1 - 10% by mass, wherein the pulse peak time (Tp) for the pulse peak current (Ip) is within a prescribed range for one period (Tpulse) according to the plate thickness of the zinc plated steel plate (W).

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, and may become pores (holes). The ...

Claims

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Application Information

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Patent Type & Authority Applications(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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