Gas shielded welding method for duplex stainless steel

A gas shielded welding, duplex stainless steel technology, applied in welding equipment, welding accessories, arc welding equipment and other directions, can solve the problem that the welding pool cannot be formed, and achieve the effect of improving welding efficiency

Pending Publication Date: 2022-07-15
SHANXI NORTH MACHINE BUILDING
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the duplex stainless steel gas shi

Method used

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Example Embodiment

[0012] The content of the present invention will be further described below in conjunction with the embodiments.

[0013] The welding of the 022Cr25Ni7Mo4N duplex stainless steel by the shielded welding method of the present invention, the specific steps are as follows:

[0014] 1) Connect argon (GB / T4842-2017) to the Ar interface of the gas mixing proportioner, and carbon dioxide (GB / T23938-2009) to the CO2 of the gas mixing proportioner 2 interface.

[0015] 2) Adjust the Ar flow to 50L / min and adjust the CO 2 The flow rate is 1.5L / min.

[0016] 3) Open the gas cylinder to deflate and wait for the gas to flow out for a period of time.

[0017] 4) Connect the outlet of the gas mixing proportioner to the gas pipe of the welding machine.

[0018] 5) Start welding.

[0019] Using the shielding gas of the invention to weld 022Cr25Ni7Mo4N duplex stainless steel, the post-welding flaw detection is qualified and the performance is suitable, which greatly improves the weldi

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Abstract

The invention discloses a gas shielded welding method for duplex stainless steel. According to the method, argon and carbon dioxide are selected as protective gas; an argon gas tank and a carbon dioxide gas tank are respectively connected into a gas inlet interface of a gas mixing and proportioning device, and an outlet of the gas mixing and proportioning device is connected into a welding machine gas pipe; and the argon flow is adjusted to be 50 L/min, the carbon dioxide flow is adjusted to be 1.5 L/min, the mixed gas is emptied for 5 s or above, and welding is started. The selection standard of the argon is GB/T4842-2017, and the selection standard of the carbon dioxide is GB/T23938-2009. According to the gas shielded welding method, the problem that a gas shielded welding pool cannot be formed is solved, and duplex stainless steel gas shielded welding success is achieved. Compared with traditional manual electric arc welding and argon arc welding, the welding efficiency is greatly improved.

Description

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Claims

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Application Information

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Owner SHANXI NORTH MACHINE BUILDING
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