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Welding method of deck structure of stainless steel compound plate for railway steel bridge

A technology of clad steel plate and welding method, applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc., can solve the problem that stainless steel clad steel plate is not suitable for large-scale production of bridge deck structure, the labor intensity of welding workers is high, and the welding seam The quality is not easy to guarantee and other problems, to achieve the effect of facilitating mass production, ensuring corrosion resistance, and realizing mechanization and automation

Active Publication Date: 2012-01-25
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, one of the key issues of whether stainless steel clad steel plates can be used for steel bridge decks is the welding problem of stainless steel clad steel plates. Stainless steel clad steel plates are composed of two layers of steel with significant differences in chemical composition, mechanical properties and weldability. It is impossible to weld with a single welding material and welding process, and the welding process of commonly used stainless steel clad steel plates is not suitable for large-scale production of bridge deck structures. The labor intensity of welding workers is high, the production efficiency is low, and the quality of welds is not easy to guarantee

Method used

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  • Welding method of deck structure of stainless steel compound plate for railway steel bridge
  • Welding method of deck structure of stainless steel compound plate for railway steel bridge
  • Welding method of deck structure of stainless steel compound plate for railway steel bridge

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Experimental program
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Effect test

Embodiment 1

[0029] A method for welding the bridge deck structure of stainless steel clad steel plates for railway steel bridges. The material combination of the stainless steel clad steel plates is 321-Q370qE, wherein the thickness of the clad stainless steel 321 is 3 mm, and the thickness of the base layer Q370qE is 16 mm. Press 6 groups of 321-Q370qE stainless steel clad steel plates with dimensions (3+16)×200×600mm figure 1 The way to process the groove. The cladding material is pre-removed 3mm on both sides of the groove, the groove angle is 50°, and the groove spacing is 6mm.

[0030] The welding test conditions are as follows:

[0031] Welding equipment: YM-500KR2 Tangshan Panasonic CO 2 Gas shielded welding equipment, MUDE-1250 Shanghai Hengtong automatic submerged arc welding equipment.

[0032] Welding consumables for the base layer: YCJ501Ni-1 for backing welding, and H08Mn2E+SJ101q for each weld pass of the other base layers.

[0033] Welding material for transition layer:...

Embodiment 2

[0039] A method for welding the bridge deck structure of stainless steel clad steel plates for railway steel bridges. The material combination of the stainless steel clad steel plates is 347-Q370qE, wherein the thickness of the clad stainless steel 347 is 4mm, and the thickness of the base layer Q370qE is 20mm. Press 5 groups of 347-Q370qE stainless steel clad steel plates with dimensions (4+20)×200×600mm figure 1 The way to process the groove. The cladding material is pre-removed 6mm on both sides of the groove, the angle of the groove is 45°, and the distance between the grooves is 8mm.

[0040] The welding test conditions are as follows:

[0041] Welding equipment: YM-500KR2 Tangshan Panasonic CO 2 Gas shielded welding equipment, MUDE-1250 Shanghai Hengtong automatic submerged arc welding equipment.

[0042] Welding materials for the base layer: SQJ501Ni for backing welding, and H08Mn2E+SJ101q for each weld pass of the other base layers.

[0043] Welding material for tr...

Embodiment 3

[0049] A method for welding the bridge deck structure of stainless steel clad steel plates for railway steel bridges. The material combination of the stainless steel clad steel plates is 321-Q420qE, wherein the thickness of the clad stainless steel 321 is 3 mm, and the thickness of the base layer Q420qE is 16 mm. 8 groups of 321-Q420qE stainless steel clad steel plates with a size of (3+16)×200×600mm were pressed figure 1 The way to process the groove. The composite material is pre-removed 5mm on each side of the groove, the groove angle is 65°, and the groove distance is 4mm.

[0050] The welding test conditions are as follows:

[0051] Welding equipment: YM-500KR2 Tangshan Panasonic CO 2 Gas shielded welding equipment, MUDE-1250 Shanghai Hengtong automatic submerged arc welding equipment.

[0052] Welding consumables for the base layer: SQJ501Ni for backing welding, and CJQ-1+SJ101q for each weld pass of the other base layers.

[0053] Welding material for transition lay...

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Abstract

The invention discloses a welding method of a deck structure of a stainless steel compound plate of a railway steel bridge, which comprises the following steps: selecting structural steel for a bridge with thickness of 16-20mm as a base layer, selecting austenitic stainless steel with thickness of 2-4mm as a multiple layer, and removing 3-6mm of cladding material materials at each of two edges of welding grooves in advance, wherein the groove angle is 45-65 degrees, and the groove spacing is 4-8mm; the method comprises the following steps: firstly, assembling positioned welding, and then, carrying out backing welding by CO2 gas shielded welding; then, carrying out welding of the base layer by submerged-arc welding; and finally, carrying out welding of a transition layer and the multiple layer by the CO2 gas shielded welding. By adopting a specific groove type, the invention eliminates uncertain human factors and solves the problems that the thickness of the deposited metal of the base layer is insufficient, the multiple layer can be molten by mistake when the substrate layer is welded, and the like; the reverse formation is good, so that the reverse back gouging process is omitted; and the invention has the advantages of good assembly quality and easy realization of mechanization and automation, improves the production efficiency, and is convenient for ensuring the corrosion resistance of the multiple layer.

Description

technical field [0001] The invention relates to the technical field of welding of stainless steel clad steel plates, in particular to a welding method for a bridge deck structure of stainless steel clad steel plates used for railway steel bridges. Background technique [0002] Stainless steel clad steel plate is an ideal engineering structural material. It has a wide range of material combinations and thickness ratios, so that the performance and size of the material can be perfectly matched, and the advantages of the material can be fully utilized to obtain good corrosion resistance of the existing clad material. , and the high strength and toughness of the base material, so it is often the material of choice for designers when solving complex and important engineering structures. With the rapid development of bridge construction, adopting new technologies, new materials and highlighting innovation have become the guiding ideology of bridge designers. Stainless steel clad ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/02B23K9/16B23K9/18B23K33/00B23K101/16B23K103/04
Inventor 王小华辛宝张超
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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