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Solid welding wire for unplating welding use

A solid core welding wire, welding wire technology, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem of not meeting the tensile strength of welding wire

Inactive Publication Date: 2003-11-05
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
Comparison scheme
Effect test

Embodiment

[0057] Below, the Example of this invention is demonstrated in comparison with the comparative example which deviates from the scope of the invention.

[0058] The following Table 1 shows the welding conditions, and the following Table 2 shows the evaluation criteria of the arc startability. In addition, all of the following are examples and comparative examples of welding wires based on solid welding wires made of uncoated steel wires with a wire diameter of 1.2 mm. In addition, all the oils used in the next Examples and Comparative Examples were oils containing polyisobutylene as a main component.

[0059] Protective gas

[0060] arc ignition

[0061] In addition, in the welding test, 100 sets of operations were repeated with the arc generation time of 3 seconds and the arc stop time of 30 seconds as one set. The 100 groups were graded on the basis of the total number of evaluation points according to the criteria of Table 3 below.

[0062] To...

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PUM

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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 welding wire made of uncoated steel wire, in particular to semi-automatic welding or automatic welding of medium plates (thickness 2mm to 4mm) or thin plates (thickness less than 2mm) Among them, uncoated solid wire for welding with excellent wire feedability and arc ignition performance. Background technique [0002] At present, especially in the thin plate welding process in the automobile industry and the like, high efficiency is being promoted, and the welding speed is also increasing. On the other hand, in order not to degrade the welding quality, a method that can shorten the time required for the arc to stabilize immediately after the arc is ignited as much as possible, that is, to improve the arc-ignition performance, is desired. Also, the need exists even if the arc is frequently and repeatedly switched on / off. [0003] However, in the case of a copper-plated welding wire, copper plating scr...

Claims

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Application Information

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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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