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arc welding method

A technology of arc welding and welding wire, applied in the field of arc welding, which can solve the problems of insufficient research on the cohesion of slag and residual slag

Active Publication Date: 2021-12-21
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, in the arc welding methods described in Patent Documents 1 and 2, the cohesion of slag has not been sufficiently studied, and there is still room for improvement.
That is, if the slag is not sufficiently agglomerated during welding, the slag remains in the welded part, and as a result, the above-mentioned problems may occur.

Method used

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no. 1 approach

[0037] The arc welding method according to the first embodiment of the present invention (hereinafter also referred to as the welding method according to the first embodiment) is an arc welding method for welding steel plates by controlling feeding of the welding wire in the advancing and retreating direction, wherein the following welding wire is used: Welding with a gas containing Ar, the frequency in the forward and backward direction of the welding wire is 35 Hz to 160 Hz, and the welding wire contains C, and contains Si: 0.2% to 1.3% by mass %, Mn: 0.2% Above and below 1.5%, and S: above 0.01% and below 0.05%, and the balance is composed of Fe and unavoidable impurities.

[0038] In the welding method according to the first embodiment, arc welding is performed by controlling feeding of a welding wire in an advancing and retreating direction. More specifically, the following operations are repeated: controlling the feeding of the welding wire in the direction of advance an...

no. 2 approach

[0084] The arc welding method of the second embodiment of the present invention (hereinafter also referred to as the welding method of the second embodiment) is an arc welding method for performing arc welding on a steel plate in a pulse-controlled manner, wherein the following welding wire and Ar-containing Gas, welding with a voltage pulse frequency of 50 Hz to 200 Hz, and a voltage pulse width of 1.5 ms to 10 ms, the welding wire contains C, and Si: 0.2% to 1.1% by mass % , Mn: not less than 0.2% and not more than 1.4%, and S: not less than 0.010% and not more than 0.050%, and the balance is composed of Fe and unavoidable impurities.

[0085]

[0086] The content of each element of the welding wire used in the welding method of the second embodiment and its appropriate range are as follows. The reasons for limiting the numerical values ​​are the same as those in the first embodiment.

[0087] (C)

[0088] Lower limit: more than 0%, preferably 0.02% by mass or more, more...

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Abstract

An object of the present invention is to provide an arc welding method capable of reducing the occurrence of spatter and having good slag cohesion even when the welding speed is increased. One aspect of the present invention relates to an arc welding method, which is an arc welding method for welding a steel plate by controlling feeding of a welding wire in an advancing and retreating direction, wherein the frequency of the advancing and retreating direction of the welding wire is set to 35 Hz or more by using the following welding wire and a gas containing Ar: , 160Hz or less, the welding wire contains C, and contains Si: 0.2% to 1.3% in mass%, Mn: 0.2% to 1.5%, and S: 0.01% to 0.05%, The balance consists of Fe and unavoidable impurities.

Description

technical field [0001] The present invention relates to arc welding methods. Background technique [0002] As an arc welding method capable of reducing spatter during welding of thin steel plates, an arc welding method in which welding is performed while controlling feeding of a welding wire in an advancing and retreating direction and an arc welding method in a pulse control method are known. [0003] For example, Patent Document 1 discloses a welding method as an arc welding method for suppressing the generation of blowholes such as blowholes and the generation of spatter, in which a welding wire is used for surface-treated members, and short-circuiting and sparking are repeated. arc welding method. In this welding method, it is provided with: the step of transferring the droplet formed by the welding wire to the component side; pushing the molten pool to the direction opposite to the direction of welding progress so that the gas generated from the component is discharged...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/12B23K9/073B23K9/173B23K35/30
CPCB23K9/073B23K9/12B23K9/173B23K35/30B23K9/09B23K2103/04
Inventor 木梨光梅原悠佐藤浩二
Owner KOBE STEEL LTD
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