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Welding wire filled with flux

A technology of welding wire and flux, applied in the field of welding wire filled with flux, can solve problems such as difficulties, and achieve the effects of excellent quality, excellent mechanical properties of welding metal, and excellent welding workability

Inactive Publication Date: 2012-08-29
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Therefore, in the welding of steel plates composed of low-carbon steel and high-strength steel, it has always been difficult to make full use of Ti nitrides to refine the crystal grains at the welded part as a means of suppressing hot cracking at the welded part.

Method used

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  • Welding wire filled with flux
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  • Welding wire filled with flux

Examples

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Effect test

Embodiment

[0061] Regarding the flux-filled welding wire of the present invention, Examples satisfying the conditions of the present invention and Comparative Examples not satisfying the conditions of the present invention will be specifically described.

[0062] In the steel sheath (steel use contains C: 0.03 mass%, Si: 0.02 mass%, Mn: 0.25 mass%, P: 0.010 mass%, S: 0.008 mass%, and the balance is composed of Fe and unavoidable impurities. steel) is filled with flux inside, and a wire diameter of 1.2 mm is made of the wire composition shown in Table 1 and Table 2. figure 1 Weld seam type flux-filled welding wires shown in (b) (Examples: Nos. 1 to 20, Comparative Examples: Nos. 21 to 40).

[0063] In addition, the welding wire component was measured and calculated by the following measuring method.

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Abstract

The invention provides a welding wire filled with flux, with excellent heat crack resistance of a primary layer welding part in butt weld on a single surface of a steel plate composed of a low carbon steel or a high intensity steel, excellent welding operation of a full posture welding and mechanical character of the weld metal. The welding wire is used for welding of the steel plate composed of the low carbon steel or high intensity steel and formed by filling the flux into a steel outer skin, characterized in that: relative to the total quality of the flux, the flux filling rate is 10-25 mass%, relative to the total mass of the flux, the welding wire comprises: 0.02-0.01 mass% of C, 0.05-1.50 mass% of Si, 1.7-4.0 mass% of Mn, 0.05-1.00 mass% of Ti, 5.0-8.0 mass% of TiO2, 0.20-1.50 mass%of Al, 0.05-1.0 mass% of A12O3, 0.3-2.0 mass% of Mg, 0.005-0.035 mass% of N and the residual composed of Fe and inevitable impurity.

Description

technical field [0001] The invention relates to a welding wire filled with flux used in gas-shielded arc welding of steel plates made of low-carbon steel or high-strength steel. Background technique [0002] Conventionally, in the welding of steel plates, especially in single-butt butt welding, it has been desired to be able to suppress thermal cracking that occurs in the first-layer welded portion (weld metal). As a method of suppressing such thermal cracking, the following techniques have been proposed. [0003] For example, in Patent Document 1, as a method of improving thermal cracking resistance, welding work at the expense of welding efficiency such as lowering the welding speed and lowering the welding current is proposed. In addition, in Patent Document 1, as a method of improving thermal crack resistance. It has also been proposed to reduce the amount of B in the weld metal or to reduce the S content in impurities in the welding wire. [0004] Patent Document 2 p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/368B23K35/30
CPCB23K35/0266B23K35/3608B23K35/361B23K35/368B23K2103/02C22C38/002C22C38/02C22C38/04C22C38/06
Inventor 岛本正树石田齐坂本浩一笹仓秀司柿崎智纪
Owner KOBE STEEL LTD
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