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Bimetal composite pipe welding method and product thereof

A bimetallic composite pipe and welding method technology, applied in welding equipment, laser welding equipment, metal processing equipment and other directions, can solve the problems of complex production process of bimetallic composite pipe, insufficient welding performance accuracy and high cost, and achieve flexible process. High performance and applicability, improved performance and welding efficiency, and fewer processes

Pending Publication Date: 2021-05-07
武汉飞能达激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the prior art, the object of the present invention is to provide a welding method and product of bimetallic composite pipes, aiming to solve the problems of complex production process, low efficiency, high cost, insufficient weld performance or precision of current bimetallic composite pipes The problem

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  • Bimetal composite pipe welding method and product thereof
  • Bimetal composite pipe welding method and product thereof
  • Bimetal composite pipe welding method and product thereof

Examples

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Effect test

Embodiment 1

[0039] In this embodiment, the thickness of the composite plate is 6mm+2mm for the composite layer + base layer, wherein the composite plate layer 1 is 2mm 304 stainless steel, the composite plate base layer 2 is 6mm Q235 steel, and the welding groove is I-shaped, that is, no additional artificial Processing groove. Laser-arc hybrid welding adopts laser-single arc hybrid welding, and the welding wire is ER309L. The above composite sheet is processed into a composite pipe.

[0040] Specifically include the following steps:

[0041] S1: Process I-shaped grooves on the parts to be welded on both sides of the bimetallic composite plate;

[0042] S2: The bimetal composite sheet is continuously fed into the spiral tube forming unit, gradually bent into a tube shape, and forms a spiral seam, wherein the seam gap is less than 0.3mm;

[0043] S3: Use laser-arc hybrid welding to weld the stainless steel on the inner side of the spiral tube to the clad plate weld to form a laser-arc h...

Embodiment 2

[0048] In this embodiment, the thickness of the composite plate + the base layer + the layer is 8mm+2mm+2mm, wherein the first layer 1-1 and the second layer 1-2 are 2mm 304 stainless steel, and the base layer 2 is 8mm Q235 steel, the welding groove is I-shaped. Laser-single arc hybrid welding is adopted, the welding wire is ER309L, and the powder used for laser cladding of the cover layer is 308L.

[0049] Specifically include the following steps:

[0050] S1: Process I-shaped grooves on the parts to be welded on both sides of the bimetallic composite plate;

[0051] S2: The bimetallic composite sheet is continuously fed into the spiral tube forming unit and gradually bent into a tube shape, forming a spiral seam, where the seam gap is less than 0.3mm;

[0052] S3: Use laser-arc hybrid welding to weld the weld seam of the composite plate on the stainless steel surface inside the spiral tube to form a laser-arc hybrid weld seam 8 . Figure 4 It is a schematic diagram of las...

Embodiment 3

[0060] In this embodiment, the thickness of the composite plate is (10+2) mm, wherein the cladding layer 1 of the composite plate is 2 mm 304 stainless steel, the base layer 2 of the composite plate is 6 mm Q235 steel, and the welding groove is I-shaped. Laser-arc hybrid welding adopts laser-single arc hybrid welding device, welding wire is ER309L,

[0061] Specifically include the following steps:

[0062] S1: Process I-shaped grooves on the parts to be welded on both sides of the bimetallic composite plate;

[0063] S2: The bimetallic composite sheet is formed into a straight seam tubular shape and a spiral seam through the JCOE forming process, and the seam gap is less than 0.4mm;

[0064] S3: Laser-arc hybrid welding is used to weld the stainless steel on the inner side of the spiral tube to the weld of the composite plate to form a laser-arc hybrid welding weld 8, and complete the welding of the entire bimetallic composite spiral tube. Among them, the laser-arc hybrid w...

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Abstract

The invention discloses a bimetal composite pipe welding method and a product thereof, and belongs to the field of metal welding. The bimetal composite pipe welding method comprises the following steps: S1, taking natural cut edges of to-be-welded positions on two sides of a bimetal composite plate as welding grooves; S2, gradually bending the bimetal composite plate into a pipe shape, forming a spiral seam, or forming into a straight seam pipe shape; and S3, using a laser-electric arc hybrid welding method for welding the spiral seam or a straight seam in the composite layer face, wherein a whole base layer is covered with a composite layer, and the corrosion resistance of the composite layer is better than that of the base layer. According to a bimetal composite pipe prepared through the method, the composite layer is made of stainless steel, and the thickness of a stainless steel layer accounts for 5%-25% of the thickness of the whole composite pipe. By means of the method, the problems of complex production process, low efficiency, high cost and insufficient welding seam performance or precision of a current bimetal composite pipe can be solved.

Description

technical field [0001] The invention belongs to the field of metal material welding, and more specifically relates to a welding method of a bimetallic composite pipe and its products. Background technique [0002] Bimetallic composite material is a relatively cheap metal covered with another metal with special properties by means of explosive welding, rolling, etc., without reducing the use effect of the material (such as anti-corrosion performance, mechanical strength, etc.). The effect of saving resources and reducing costs. Taking the stainless steel composite plate as an example, the thickness of the stainless steel layer only accounts for 5%-20% of the plate thickness, and the price is 1 / 2 to 2 / 3 of the overall stainless steel plate. With the deepening of research and the increasing maturity of manufacturing technology, composite plates and composite pipes have been successfully applied in metal pipes, distillation towers, heat exchangers, reaction towers, nuclear powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/70
CPCB23K26/348B23K26/702
Inventor 曹嘉明曾晓雁陈飞廷高明魏世星刘浩
Owner 武汉飞能达激光技术有限公司
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