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Method for producing vertical narrow-groove welding joint, and vertical narrow-groove welding joint

A technology of welding joints and manufacturing methods, which are applied in the manufacture of vertical narrow groove welded joints and the field of vertical narrow groove welded joints, can solve the problems of reduced welding efficiency, increased lamination defects, poor penetration, etc., and can reduce welding The effect of construction costs

Pending Publication Date: 2021-03-16
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when this welding method is applied to the welding of thick-walled steel materials, there is a problem that a small number of multi-pass lamination welding will increase lamination defects such as poor penetration, and the welding efficiency will be significantly reduced.

Method used

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  • Method for producing vertical narrow-groove welding joint, and vertical narrow-groove welding joint
  • Method for producing vertical narrow-groove welding joint, and vertical narrow-groove welding joint
  • Method for producing vertical narrow-groove welding joint, and vertical narrow-groove welding joint

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Embodiment Construction

[0050] In the method for producing an arc welding head, a thick wall having a thick wall having a thick wall having a thick wall having a thick wall having a thick wall having a thick wall having a thick wall having a thickness of 40 mm or more with a thickness of 440 mPa of the yield strength of 440 MPa. It should be noted that the general calendering steel usually the plate thickness of the steel is 100 mm. Therefore, the thickness of the steel material is preferably 100 mm or less.

[0051] First, the components (steel composition) of the high-strength steel used (steel material composition) are described. Hereinafter, the mass% of the components of the steel is recorded in%.

[0052] C: 0.03 ~ 0.15%

[0053] C is an element having an effect of improving the strength of the steel, in order to ensure the desired high strength, the present invention contains 0.03% or more. On the other hand, if more than 0.15% is contained, an island martlite is easily generated near the welded p...

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Abstract

Provided is a method for producing a vertical narrow-groove welding joint in which a welded part has exceptional toughness, the method involving the use of a thick-walled high-strength steel material.When two steel materials are butted via a narrow groove having a groove angle of 20 degrees or less and are joined by vertical gas shield arc welding using a weaving, the advancement speed (mm / min) of vertical welding and the multiplicative inverse f(s-1) of a time (s) required for synchronizing the weaving in the vertical gas shield arc welding are adjusted to within ranges that satisfy the relationship v / 60 / f <= 9.0.

Description

Technical field [0001] The present invention relates to a method for producing a welded joint used in various steel structures in the fields of vessels, buildings, and civil buildings, particularly to high-strength steels from thick-walts having a thick wall having a plate thickness of more than 40 mm to each other by vertical narrow slope gas protection. An arc welding method joined the noodle toughness of the welded portion of the welded portion and the drying joint of the welded portion of the welded portion, and the nut-axis welding joint. Background technique [0002] In recent years, steel structures such as ships, buildings, and civilians have become increasingly large, and the steel used is also highly developed and thick-walled. These steel structures are typically finished in the desired shape by welding engagement. Therefore, from the viewpoint of ensuring such a welded steel sector (hereinafter, also referred to as a welded steel structure), the steel material is not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/022B23K9/173C22C38/00C22C38/04C22C38/58
CPCB23K9/02B23K9/022B23K9/173C22C38/00C22C38/04C22C38/58
Inventor 荒尾亮上月涉平植田圭治早川直哉
Owner JFE STEEL CORP