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Solid welding wire for unplating welding use

A technology of solid welding wire and welding wire, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., and can solve problems such as not meeting the tensile strength of welding wire

Inactive Publication Date: 2005-12-28
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these conventional technologies satisfies the above-mentioned requirements in relation to the tensile strength of the welding wire.
However, there has been no technology focused on controlling the oxide film attached to the tip of the welding wire.
Therefore, there is a limit to sufficiently improving the arc ignition performance with the above-mentioned conventional technology.

Method used

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  • Solid welding wire for unplating welding use
  • Solid welding wire for unplating welding use
  • Solid welding wire for unplating welding use

Examples

Experimental program
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Effect test

Embodiment

[0058] Next, examples of the present invention will be described in comparison with comparative examples that deviate from the scope of the present invention.

[0059] The following Table 1 shows the welding conditions, and the following Table 2 shows the evaluation criteria of the arc ignitability. In addition, all of the following examples and comparative examples are welding wires based on a solid welding wire made of a non-copper-plated steel wire having a wire diameter of 1.2 mm. In addition, all the oils used in the next examples and comparative examples contain polyisobutylene as a main component.

[0060] Protective gas

[0061] Arcing

[0062] In addition, in the welding test, an arc generation time of 3 seconds and an arc stop time of 30 seconds were regarded as one set, and 100 sets were repeated. In these 100 groups, according to the total number of evaluation points, they were graded on the basis of the following Table 3.

[0063] T...

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Abstract

A plating-free solid wire for welding of the present invention contains C: 0.04 to 0.12 mass%. Si: 0.5 to 1.1 mass%, Mn: 1.0 to 1.7 mass%, Ti: not more than 0.03 mass%, and remainder Fe. In addition, the expression: Si + Mn + ( 10 x Ti) ≤ 2.5 is satisfied, where Si, Mn, and Ti denote the contents of respective elements in the wire. The tensile strength of the wire is 900 to 1300 (N / mm2). A potassium compound is present in an amount of 2 to 10 ppm in terms of potassium; MoS2, 0.01 to 0.5 g per 10 kg of the wire; and an oil containing polyisobutene, 0.3 to 1.5 g per 10 kg of the wire, on the surface and / or immediately under the surface of the non-plated wire. With such a constitution, it is possible to improve both the wire feedability and the arc start characteristics.

Description

technical field [0001] The present invention relates to an uncoated solid wire for welding made of uncoated steel wire, in particular to semi-automatic welding or automatic welding of medium plates (thickness 2mm-4mm) or thin plates (thickness less than 2mm) Among them, it is an unplated solid wire for welding with excellent wire feedability and arc ignition. Background technique [0002] At present, especially in the welding of thin plates in the automotive industry, etc., the efficiency has been improved, and the welding speed has also been increased. On the other hand, in order not to degrade the welding quality, a method of shortening the time required for the arc to stabilize immediately after the arc is ignited as much as possible is desired, that is, the improvement of the arc ignitability is sought. And, the same requirement exists even in the case of frequently repeated starting / closing of the arc. [0003] However, in the case of a copper-plated welding wire, cop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/02B23K35/22B23K35/36C22C38/00C22C38/14
CPCB23K35/0261B23K35/3053B23K35/362
Inventor 伊藤崇明清水弘之横田泰之
Owner KOBE STEEL LTD
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