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Welding method of stainless steel clad plate

A welding method and composite board technology, applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc., can solve the problems of easy cracks at joints and low welding quality, and achieve high welding efficiency, avoid cracks, The effect of improving the quality of welded joints

Inactive Publication Date: 2014-12-10
WUZHOU WANGJIE MACHINERY MFR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a welding method for stainless steel clad plates, which can solve the problem that cracks are easily generated at the joints existing in the welding of existing stainless steel clad plates, resulting in low welding quality

Method used

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  • Welding method of stainless steel clad plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] figure 1 The stainless steel clad plate shown includes a base layer 1 and a clad layer 2, the base layer 1 is Q245R, and the clad layer 2 is 301 stainless steel; when performing welding operations, first remove the surface oxides of the base layer 1 and clad layer 2 of the stainless steel clad plate to be welded ; Then process the groove on the butt end of the treated stainless steel composite plate, the groove is an X-shaped groove, the groove angle is 55°, the root gap of the groove is 1 mm, the joint root is in the base layer, and the joint root to the interface The distance is 1 mm; then, welding the base layer 1, the weld seam of the base layer 1 is composed of the first welding layer 3, the second welding layer 4 and the third welding layer 5 from inside to outside, wherein the third welding layer 5 has multiple The first welding layer 3 and the third welding layer 5 are welded by submerged arc automatic welding, the current intensity of submerged arc automatic we...

Embodiment 2

[0019] The base layer of the stainless steel clad plate in the present embodiment is Q345R, and cladding is 304 stainless steel; When carrying out welding operation, first remove the base layer of the stainless clad plate to be welded and the surface oxide of clad layer; Then the stainless clad plate after processing The butt end of the groove is processed with a groove, the groove is an X-shaped groove, the groove angle is 60°, the root gap of the groove is 2mm, the root of the joint is in the base, and the distance from the root of the joint to the interface is 2 mm; Then, weld the base , the weld of the base layer is composed of the first welding layer, the second welding layer and the third welding layer from the inside to the outside, wherein the third welding layer has multiple weld passes, and the first welding layer and the third welding layer adopt Welding by submerged arc automatic welding, the current intensity of submerged arc automatic welding is 165 amps, the arc ...

Embodiment 3

[0021] The base layer of the stainless steel clad plate in the present embodiment is Q345R, and cladding is 304 stainless steel; When carrying out welding operation, first remove the base layer of the stainless clad plate to be welded and the surface oxide of clad layer; Then the stainless clad plate after processing Groove is processed at the butt joint end, the groove is X-shaped groove, the groove angle is 65°, the root gap of the groove is 3 mm, the root of the joint is in the base, and the distance from the root of the joint to the interface is 2 mm; then, weld the base , the weld of the base layer is composed of the first welding layer, the second welding layer and the third welding layer from the inside to the outside, wherein the third welding layer has multiple weld passes, and the first welding layer and the third welding layer adopt Welding by submerged arc automatic welding, the current intensity of submerged arc automatic welding is 180 amps, the arc voltage is 23 ...

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Abstract

The invention discloses a welding method of a stainless steel clad plate, and relates to the technical field of welding. The welding method comprises the following steps that surface oxygen complexes of the stainless steel clad plate are removed; a groove is machined, the groove is an X-shaped groove, the angle of the groove is 55-65 degrees, the root gap of the groove is 1-3 millimeters, and the root portion of a joint is placed in a base layer; a base layer is welded, a first welding layer and a third welding layer of a welding seam of the base layer are welded in a submerged automatic arc welding mode, the third welding layer is provided with a plurality of welding beads, and a second welding layer is welded in a gas metal arc welding mode; a transitional layer on the connecting portion of the base layer and a multiple layer is welded, a fourth welding layer and a fifth welding layer of the transitional layer are both welded in the gas metal arc welding layer; the multiple layer is welded, a welding seam of the multiple layer is a sixth welding layer, and the sixth welding layer is welded in a large-current submerged-arc welding mode. Compared with the prior art, the welding method of the stainless steel clad plate improves the quality of a welding joint of the stainless steel clad plate and is high in welding efficiency.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a welding method for stainless steel clad plates. Background technique [0002] The stainless steel clad plate is a composite plate steel plate made of carbon steel as the base layer and stainless steel as the cladding layer. It has both the good mechanical strength and processing performance of carbon steel and the corrosion resistance of stainless steel. It is widely used in petroleum, Chemical industry, salt industry, water conservancy and electric power and other industries. The existing stainless steel clad plate welding method is to weld the base layer and the clad layer separately, and weld the transition layer at the junction of the base layer and the clad layer. However, during the welding process, since the base layer and the clad layer are two different materials, the welded joint Cracks are prone to occur at the joints, making the welding at the joints weak and redu...

Claims

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Application Information

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IPC IPC(8): B23K9/23B23K9/235B23K9/18B23K9/173B23K33/00B23K103/04
CPCB23K9/23B23K9/0216B23K9/173B23K9/18B23K9/235B23K33/00B23K2101/18B23K2103/04
Inventor 宣景勤
Owner WUZHOU WANGJIE MACHINERY MFR
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