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Method for manufacturing seamed flux-cored welding wire

A welding wire and seam welding technology, applied in the field of seam flux-cored welding wire, can solve the problems that have not been put into practical application, and achieve the effect of improving feedability and increasing processing speed

Active Publication Date: 2005-03-09
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Therefore, under this condition, in practice, a uniform high-speed wire drawing operation including the step part of providing a large processing ratio at the initial stage of wire drawing through a roller die has not yet been put into practical use in actual FCW manufacturing.
In addition, the wire drawing operation with uniform high speed and high wire diameter accuracy by the roller die includes the steps of forming U-shaped strip steel, the step of filling flux in the formed U-shaped strip steel, and forming the U-shaped strip steel into The steps of tubular welding wire are still not put into practical use

Method used

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  • Method for manufacturing seamed flux-cored welding wire
  • Method for manufacturing seamed flux-cored welding wire
  • Method for manufacturing seamed flux-cored welding wire

Examples

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Embodiment

[0133] Hereinafter, embodiments of the present invention will be specifically explained. in Figure 1A In the FCW manufacturing process shown, the 1.2mm product diameter FCW is made of various strip steels (rings) made of low carbon steel with the composition shown in Table 1, each flux with the composition shown in Table 2 is used, and the use shown in Table 3. Ingredients of each lubricant. In this step, as shown in Tables 4 and 5, the ratio t / w between the thickness t and the width w of the strip is changed in various ways (the width is 12 to 14 mm, and the thickness is in the range of 0.85 to 1.4 mm). The drawing conditions of the secondary welding wire are changed as shown in Tables 4 and 5. Incidentally, Table 4 shows the examples of the present invention, and Table 5 shows the comparative examples.

[0134] Here, as in the environment used for FCW products, due to the defects of the air conditioning system, nature and environment, the condition of preventing the moisture ab...

Embodiment 8

[0152] For Invention Example 8, where the residual wire drawing lubricant deposition amount after wire drawing is relatively small 0.5 g per 10 kg of welding wire, compared with other invention examples with relatively large lubricant deposition amount, the secondary wire drawing The maximum speed is small. For this reason, the moisture content of the entire welding wire is slightly increased compared with other inventive embodiments with high-order welding wire drawing maximum speed. However, in the weldability evaluation of the inventive example, no porosity defect occurred in the welded joint. This tendency to increase the moisture content indicates the following fact. That is, depending on the environment used for FCW production, specifically, when it is difficult to control the small amount of moisture content in the atmosphere during the wire drawing process, the moisture content in the atmosphere during the wire drawing process is very high. There is a great possibility tha...

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Abstract

Disclosed herein is a manufacturing method, excellent in wire drawability, of a seamed flux-cored welding wire having both favorable feedability and low hydrogen content characteristic. The method for manufacturing a seamed flux-cored wire, comprises the steps of: drawing a tube-like formed wire including a flux filled therein using a lubricant; removing the lubricant from the drawn wire by a physical means; and coating a lubricant (coating an oil) for wire feeding on the wire surface. The respective steps are carried out in an in-line manner. In the wire drawing step, a wire drawing lubricant containing a sulfur-bearing high-pressure lubricant is used, and the overall wire drawing from the tube-like formed wire to a roughly product-diameter wire is carried out by means of a roller die.

Description

Technical field [0001] The invention relates to a method for manufacturing a seam flux-cored welding wire with both good feedability and low hydrogen content characteristics. The method has excellent wire stretchability. More specifically, it relates to a method for manufacturing a seam flux-cored welding wire suitable for welding low-carbon steel, high-tensile-strength steel, heat-resistant steel, etc., arc welding wire for full-automatic or semi-automatic welding. Background technique [0002] The arc welding wire used for fully automatic or semi-automatic welding includes: solid welding wire and flux-cored welding wire formed by adding flux to a tubular shell steel strip (hereinafter referred to as a ring or steel ring) (hereinafter only referred to as welding wire or FCW). In addition, the FCW includes a form with a connected loop (hereinafter only referred to as a seam), which is one of the objects of the present invention; and a seamless form without such a connection. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/00B21C3/08B21C9/00B21C37/04B23K35/40
CPCY10T29/49879B23K35/406B21C37/042B21C9/00B23K35/0266
Inventor 松口晃宫崎邦彰政家规生
Owner KOBE STEEL LTD
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