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Welding method of stainless steel lining composite board

A welding method and composite plate technology, applied in welding equipment, laser welding equipment, welding/welding/cutting items, etc., can solve the problems of difficulty in realizing thick-walled composite plate welding, unstable low-temperature impact performance, and poor corrosion resistance. , to achieve high-quality and efficient welding, low welding cost, and excellent weld performance.

Active Publication Date: 2018-10-26
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Although this welding method solves the problem of low production efficiency caused by the large amount of cladding weld deposition, it has the problems of poor corrosion resistance and unstable low-temperature impact performance in narrow gap welding such as laser welding, and this welding method uses a single Double-sided molding for side welding, limited penetration depth, difficult to achieve welding of thick-walled composite plates

Method used

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  • Welding method of stainless steel lining composite board
  • Welding method of stainless steel lining composite board
  • Welding method of stainless steel lining composite board

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with specific embodiments.

[0020] In this embodiment, the (16+2) mm 304 / X65 hot-rolled bimetal composite plate is taken as an example for welding, and the size of the welding test plate is 180×500 mm.

[0021] (1) Make double V-shaped grooves on the welding test plate, the specific dimensions are as follows figure 1 As shown: the thickness of the carbon steel layer 1 is 16 mm, the thickness of the corrosion-resistant alloy layer 2 is 2 mm, the height of the V-shaped groove on one side of the carbon steel layer 1 is less than the thickness of the carbon steel layer 1 8 mm, and the groove angle is 75° , the height of the V-groove on one side of the corrosion-resistant alloy layer 2 is greater than the thickness of the corrosion-resistant alloy layer by 1mm, the width of the bottom is 3mm, and the groove angle is 60°

[0022] (2) Butt the welding test plates, use MAG to weld the V-shaped groo...

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Abstract

The invention discloses a welding method of a stainless steel lining composite board. The welding method comprises the steps that double V-shaped grooves are formed; welding is carried out on the bottom of the V-shape groove in one side of a carbon steel layer by adopting MAG welding, and a pre-welding joint is formed; welding is carried out on a groove between the V-shaped groove in one side of acorrosion-resistant alloy layer and the V-shape groove in one side of a carbon steel layer by adopting plasma welding, laser welding or TIG, and a base layer inner weld joint is formed; welding is carried out on exterior of the pre-welding joint on one side of the carbon steel layer by adopting submerged arc welding to form a base layer outer weld joint; welding is carried out on the bottom of the V-shaped groove at one side of the corrosion-resistant alloy layer by adopting the MAG or the TIG, and a transition layer welding joint is formed; and welding is carried out on the exterior of the transition layer welding joint by adopting the MAG or the TIG, and a composite welding joint is formed. According to the welding method, through the matching of the reasonable groove design and the welding process, high-quality and efficient welding of the stainless steel lining composite board is achieved, the performance is excellent, automatic production is easy to realize, and the wide market prospect is achieved.

Description

Technical field: [0001] The invention relates to the technical field of layered structure bimetal welding, in particular to a welding method for a stainless steel-lined composite plate. Background technique: [0002] With the increasing demand for energy, the exploitation of oil and gas in harsh corrosive environments has also gradually increased, and the problem of pipeline corrosion has become particularly prominent. Traditional single anti-corrosion technologies such as adding corrosion inhibitors, using plastic inner coatings and using non-metallic pipes, etc. , It has been difficult to meet the needs in terms of corrosion resistance, reliability and economic indicators. In order to solve the high H content 2 S / CO 2 Corrosion problems are faced in the exploitation of highly corrosive oil and gas fields and oil and gas transportation. Corrosion-resistant alloy pipes such as stainless steel and titanium alloys are widely used in corrosive environments such as petroleum, ...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K28/02B23K33/00B23K101/18B23K103/16
CPCB23K26/348B23K28/02B23K33/004
Inventor 田磊毕宗岳牛辉刘海璋杨军杨耀斌王盼牛爱军张万鹏梁航赵红波刘斌席敏敏
Owner BC P INC CHINA NAT PETROLEUM CORP
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