MULTI-ELECTRODE SUBMERGED ARC WELDING METHOD, WELDED JOINT, AND METHOD FOR MANUFACTURING SAME

Title:

MULTI-ELECTRODE SUBMERGED ARC WELDING METHOD, WELDED JOINT, AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2016/199419

Kind Code:

A1

Abstract:

Provided is a multi-electrode submerged arc welding method that uses a plurality of electrodes, wherein for a second electrode through nth electrode (n being an integer of 2 or greater) excluding a first electrode, which is an electrode at the front in the direction of welding progress: a welding power supply capable of controlling a waveform for the welding current is used as a welding power supply; and letting Fimax (N/m) be the maximum value for electromagnetic force Fi working on an arc column at the wire tip of the ith electrode during welding, Fiave (N/m) be the average value for the electromagnetic force Fi, and σFi (N/m) be the standard deviation for the electromagnetic force Fi, welding is carried out with Fimax, Fiave, and σFi set to satisfy the relationships in Equation (1) and Equation (2).

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Inventors:

KOZUKI SHOHEI (JP)
HAYAKAWA NAOYA (JP)
OI KENJI (JP)

Application Number:

PCT/JP2016/002786

Publication Date:

December 15, 2016

Filing Date:

June 08, 2016

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B23K9/18

Foreign References:

JPH06328254A	1994-11-29
JPH07266046A	1995-10-17
JPS5868468A	1983-04-23

Other References: