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A high-efficiency welding method for stainless steel clad plates

A welding method and composite plate technology, applied to welding equipment, arc welding equipment, workpiece edge parts, etc., can solve the problems of low welding efficiency, achieve the effects of improving welding efficiency, ensuring weld penetration, and improving welding construction efficiency

Inactive Publication Date: 2016-02-03
JIGANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above-mentioned traditional stainless steel clad plate welding process, the transition layer and the cladding layer are welded separately, and the welding efficiency is too low due to the need to use low current and low heat input to weld the transition layer and cladding layer. A welding method that ensures welding quality while improving welding efficiency of stainless steel clad plates

Method used

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  • A high-efficiency welding method for stainless steel clad plates
  • A high-efficiency welding method for stainless steel clad plates

Examples

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Effect test

Embodiment 1

[0027] In this example, 022Cr17Ni12Mo2 stainless steel is used as composite material, and the stainless steel clad steel plate with low alloy structural steel Q345B as the base material is taken as an example to illustrate the embodiment of the present invention. The thickness of the stainless steel clad layer is 2.5mm, and the thickness of the base layer is 8.0mm. The following steps are used for efficient welding of this stainless steel clad plate.

[0028] (a) Process the welding end of the stainless steel clad plate into such figure 1 The Y-shaped groove shown. The groove angle is 60°, and the blunt edge size is 3mm.

[0029] (b) Use an angle grinder to grind the processed groove to remove oil stains and iron oxide scales within 20mm of the groove surface and its vicinity, so as to avoid defects such as pores in the weld during welding. After polishing, follow the figure 1 Groove pairing as shown.

[0030] (c) Use gas shielded welding to weld the base weld and fill the...

Embodiment 2

[0034] In this example, 022Cr17Ni12Mo2 stainless steel is used as composite material, and the stainless steel clad steel plate with low alloy structural steel Q345B as the base material is taken as an example to illustrate the embodiment of the present invention. The thickness of the stainless steel clad layer is 2.5mm, and the thickness of the base layer is 8.0mm. The following steps are used for efficient welding of this stainless steel clad plate.

[0035] (a) Process the welding end of the stainless steel clad plate into such figure 1 For the Y-shaped bevel shown, the bevel angle is 60°, and the blunt edge size is 3mm;

[0036] (b) Use an angle grinder to grind the processed groove to remove oil stains and iron oxide scales within 20mm of the groove surface and its vicinity. After polishing, follow the figure 1 Groove pairing as shown.

[0037] (c) Use gas-shielded welding to weld the base weld, select ER50-6 solid wire with a diameter of 1.2mm, and the shielding gas is...

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Abstract

The invention relates to the field of composite board welding methods, in particular to a high-efficiency welding method of a stainless steel composite board. The high-efficiency welding method of the stainless steel composite board comprises the following steps: processing grooves; cleaning and pairing the grooves; welding a base layer on the side of a composite layer; welding the composite layer; welding a base layer on a back surface. The high-efficiency welding method of the stainless steel composite board has the beneficial effects that since electroslag welding with wire electrodes is adopted for welding the composite layer and electrode wires with content of Cr and Ni which is close to the content of Cr and Ni of composite materials, low-carbon weld metal with excellent corrosion resistance is guaranteed to be obtained; since the electroslag welding with wire electrodes has the characteristics of small weld depth and large weld width, welding passes can be effectively reduced, the reduction of the welding passes means the simplification of the welding process, the welding efficiency is improved and the probability of occurrence of defects such as incomplete fusion and slag inclusion is also greatly reduced; since the base layer of the back surface is welded by adopting 450A-500A large-current submerged-arc welding, the weld penetration of base metal can be effectively guaranteed, the defect of incomplete fusion is precluded from occurring and the welding efficiency can be greatly improved.

Description

technical field [0001] The invention relates to the field of welding methods for composite plates, in particular to a high-efficiency welding method for stainless steel composite plates. Background technique [0002] Stainless steel clad plates are often used in equipment manufacturing in the corrosive medium industry, which can meet the requirements of corrosion resistance and reduce equipment manufacturing costs. When welding stainless steel composite plates with a thickness of 4.5mm or more, when welding the junction of the base layer and the clad layer, welding consumables with higher Cr and Ni content than the clad layer must be used for welding the transition layer, and when welding the transition layer, a small current must be used , The welding method of low heat input, the purpose is to reduce the dilution of Cr and Ni in the transition layer weld metal and the diffusion of C to the transition layer weld. When welding cladding, in order to avoid defects such as the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/02
CPCB23K9/16B23K9/18B23K31/02B23K33/004B23K2101/185
Inventor 李敏朱延山孙风晓徐洪庆李旺生王焕洋王勇
Owner JIGANG GRP
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