Submerged arc welding method of plank boards and jointing boards

A technology of submerged arc welding and submerged arc welding wire, which is applied in the direction of welding equipment, arc welding equipment, and the edge of the workpiece, and can solve the problems of large residual stress in the weld, incomplete penetration, and high rigidity of the large-thickness plate structure. Satisfied performance and guaranteed quality

Inactive Publication Date: 2009-12-23
CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
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AI Technical Summary

Problems solved by technology

However, the submerged arc automatic welding of thick plates is prone to defects such as pores, cracks, slag inclusions, lack of fusion, and lack of penetration
The most important disadvantage is that the welding deformation is not easy to control, and the main reasons for its welding deformation are:
[0003] 1. Due to the high rigidity of the structure of the large thickness plate, the cooling rate after welding is fast, and the weld seam is greatly restrained, so the residual stress on the weld seam is also large, which causes large deformation and cannot obtain satisfactory products
[0004] 2.

Method used

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  • Submerged arc welding method of plank boards and jointing boards
  • Submerged arc welding method of plank boards and jointing boards
  • Submerged arc welding method of plank boards and jointing boards

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Embodiment Construction

[0035] like figure 1 , 2 As shown in , 3, a kind of submerged arc welding method of thick plates in this embodiment, taking a plate thickness of 35mm as an example, performs submerged arc welding of plates:

[0036] 1. Plate type: CCSE plate thickness: 35mm plate length: 10100mm plate width: 2380mm×2

[0037] The plates are low-alloy high-strength steels. According to the principle of equal strength, the welding materials are selected according to Table 1.

[0038] Table 1: Welding Material Parameters

[0039]

[0040] 2. Groove form: such as figure 1 As shown, by mechanical processing, a 35-degree bevel is made on the upper part of the steel plate material 1 to be butted, and a 25-degree bevel is made on the lower part. After the steel plate materials are butted, the upper bevel is 70 degrees, and the lower bevel is 50 degrees. .

[0041] 3. Preparation before welding:

[0042] ① Remove harmful substances such as oil stains, rust, oxides and moisture within 20mm of t...

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Abstract

The invention discloses a submerged arc welding method of plank boards and jointing boards, which is characterized in that through steps of reasonable welding material selection, strict pre-welding preparation, scientific pre-welding preheating, welding process and welding technology, the welding quality of submerged arc automatic welding of plank boards with the thickness of 25mm to 45mm is controlled. The pass rate of welding seams by shooting once reaches 100 percent, and welding distortion is controlled ideally. The mechanical property of a welding joint meets standard requirements, and ensures the quality of products.

Description

technical field [0001] The invention relates to a submerged arc welding method, in particular to a submerged arc welding method for splicing thick plates, which can well control the welding deformation of the submerged arc welding of 25 mm to 45 mm thick plates, and belongs to the field of welding technology. Background technique [0002] The thick plate is welded by submerged arc automatic welding, which can not only improve labor efficiency, reduce labor intensity, improve the working environment, save welding materials, but also reduce labor costs. However, the submerged arc automatic welding of thick plates is prone to defects such as pores, cracks, slag inclusions, lack of fusion, and lack of penetration. The most important disadvantage is that the welding deformation is not easy to control, and the main reasons for its welding deformation are: [0003] 1. Due to the high structural rigidity of the large-thickness plate, the cooling rate after welding is fast, and the ...

Claims

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Application Information

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IPC IPC(8): B23K9/18B23K9/235B23K33/00B23K9/095
Inventor 李佳南邵丹丹何艺梁剑明
Owner CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
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