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Single-wire submerged arc welding process for steel plate with thickness of 30-50mm

A welding process, submerged arc welding technology, applied in welding equipment, arc welding equipment, welding/welding/cutting items, etc., can solve the problems of more gas and labor consumption, bending deformation, and a large amount of labor, so as to improve construction efficiency , Reduce the effect of labor and material input

Active Publication Date: 2021-08-27
二十二冶集团装备制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the V-shaped groove is processed by machining, a lot of labor is required, and it is easy to produce bending deformation after flame cutting, and consumes more gas and labor.

Method used

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  • Single-wire submerged arc welding process for steel plate with thickness of 30-50mm
  • Single-wire submerged arc welding process for steel plate with thickness of 30-50mm
  • Single-wire submerged arc welding process for steel plate with thickness of 30-50mm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Welding target: plate-to-plate butt joint 30×625×1000 (mm).

[0034] Plate: two 30×300×1000 (mm) steel plates; one steel liner 10×40×1000 (mm).

[0035] Blanking: directly cut out the required test plate by flame cutting, and the joint 1 does not have a bevel, that is, the joint form is I-type bevel 2.

[0036] Assembly and fixation: Groove 2 gap 25mm, spot welding steel liner 3 on the back of the weld seam.

[0037] Bottom welding: H10Mn2 with SJ101 flux; wire diameter 4.0mm submerged arc welding wire.

[0038] The welding current is 450-500 (A), the voltage is 30-33 (V), and the welding speed is 37-44 (cm / min). The bottoming welding operation is specifically as follows:

[0039] Rotate the submerged arc welding machine head 10° to the right for right bottoming 41 welding to ensure that the weld seam is fully fused with the side wall gasket. After the right bottoming 41 is completed, its side wall weld seam height is 5-8mm, and the steel liner 3 side weld seam widt...

Embodiment 2

[0045] Welding goal: to make a group of H boxes with a section of 500×270×30 (mm) and a length of 2m.

[0046] Plate: two 30mm×290mm×2m steel plates; two 30mm×270mm×2m steel plates; one steel liner 10mm×40mm×2m.

[0047] Blanking: directly cut out the required test plate by flame cutting, and the joint does not have a bevel, that is, the form of the joint is I-type bevel 2.

[0048] The box-shaped main seam is not grooved, the joint form is I-shaped groove back steel liner 3, and the gap between groove 2 is 25mm.

[0049] Weld each main seam as follows.

[0050] 1. Bottom welding: use H10Mn2 with SJ101 flux, wire diameter 4.0 submerged arc welding wire; welding current is 450-500 (A), voltage is 30-33 (V), welding speed is 37-44 (cm / min) . Rotate the head of the welding machine 10° to the left or right respectively to perform left bottom welding and right bottom welding.

[0051] 2. Filling and covering: use H10Mn2 with SJ101 flux, wire diameter 4.0 submerged arc welding w...

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Abstract

The invention relates to a single-wire submerged-arc welding process for a steel plate with a thickness of 30-50mm, which comprises the following steps of: pre-splicing a structure after derusting, and adopting an I-shaped groove with a welding seam gap of 25 mm; welding a steel liner on the back of the groove; using submerged-arc welding for backing welding, wherein H10Mn2 is matched with SJ101 welding flux, the diameter of a welding wire is 4.0 mm, the welding current is 450-500 (A), the voltage is 30-33 (V), and the welding speed is 37-44 (cm / min); adjusting a welding machine head to weld a right base and a left base respectively, to make the left base and the right base overlapped in the middle; using H10Mn2 matched with SJ101 welding flux for filling and capping welding, and using submerged-arc welding wires with the diameter of 4.0 for filling and capping, wherein the welding current ranges from 450-500 (A), the voltage ranges from 31-35 (V), and the welding speed ranges from 37-45 (cm / min); adjusting a welding machine head to perform left filling welding and right filling welding respectively, and alternately welding and overlapping filling welding seams left and right; carrying out cover surface rotary welding; and (6) removing welding equipment, and waiting for natural cooling of the weld seam. According to the welding process, the arc axis is parallel to the side wall during narrow gap welding, the weld seam and base metal are well fused, and the construction efficiency is improved.

Description

technical field [0001] The invention belongs to a single-wire submerged arc welding process, in particular to a single-wire submerged arc welding process for a 30-50 mm thick steel plate. Background technique [0002] Welding steel plates with a thickness of more than 20mm requires beveling of the steel plates, and the welding process is different for different plate thicknesses, specifically reflected in the parameters such as bevel form, weld width, welding current and voltage, etc. In various forms. This requires blanking and submerged arc welding personnel to have a higher skill level. In submerged arc welding of box-shaped steel structures, the welds of the main body of the box are mostly V grooves with steel backing, and submerged arc welding. The V-shaped groove is obtained by machining or flame cutting during blanking. If the V-groove is processed by machining, a lot of labor is required, and bending deformation is easy to occur after flame cutting, and it consume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/18B23K9/235
CPCB23K9/18B23K9/235B23K2101/18B23K2103/04
Inventor 户成才邢生英盛吉李凯
Owner 二十二冶集团装备制造有限公司
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