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Welding method of duplex stainless steel thin plate

A duplex stainless steel and welding method technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of non-fusion, slow welding speed, and low welding efficiency, so as to improve welding speed and welding efficiency and solve unforeseen problems. fusion effect

Inactive Publication Date: 2017-08-29
CRRC SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a welding method for duplex stainless steel thin plates, which solves the problems of low welding efficiency, slow welding speed and easy occurrence of non-fusion phenomenon in the welding method of duplex stainless steel thin plates in the prior art

Method used

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  • Welding method of duplex stainless steel thin plate
  • Welding method of duplex stainless steel thin plate

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Effect test

Embodiment 1

[0030] A method for welding duplex stainless steel sheets, comprising the following steps:

[0031] 1) Process the groove on the duplex stainless steel plate, butt weld after the groove processing is completed;

[0032] 2) Argon-helium-hydrogen ternary gas shielded argon arc welding is used, and thorium tungsten electrode and duplex stainless steel welding wire W22 93NL are used for welding. The volume fraction ratio of the ternary mixed gas used is 22% argon, 74% helium, Hydrogen 4%.

Embodiment 2

[0034] A method for welding duplex stainless steel sheets, comprising the following steps:

[0035] 1) Process the groove on the duplex stainless steel plate, butt weld after the groove processing is completed;

[0036] 2) Argon-helium-hydrogen ternary gas shielded argon arc welding is used, and thorium tungsten electrode and duplex stainless steel welding wire W22 93NL are used for welding. The volume fraction ratio of the ternary mixed gas used is 20% argon and 75% helium. Hydrogen 5%.

Embodiment 3

[0038] A method for welding duplex stainless steel sheets, comprising the following steps:

[0039] 1) Process the groove on the duplex stainless steel plate, butt weld after the groove processing is completed;

[0040] 2) Argon-helium-hydrogen ternary gas shielded argon arc welding is used, and thorium tungsten electrode and duplex stainless steel welding wire W22 93NL are used for welding. The volume fraction ratio of the ternary mixed gas used is 18% argon and 76% helium. Hydrogen 6%.

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Abstract

The invention discloses a welding method of a duplex stainless steel thin plate. The welding method comprises the following steps: chamfering the duplex stainless steel thin plate and then carrying out butt weld; protecting argon arc welding by adopting argon-helium-hydrogen helium ternary gas; and utilizing a thorium tungsten electrode and duplex stainless steel solder wire W22 93NL for welding, wherein the volume fraction ratio of the adopted ternary mixed gas is 18-22% of argon, 74-76% of helium and 4-6% of hydrogen. With adoption of the welding method, the problems in the prior art that the welding method of the duplex stainless steel thin plate is low in welding efficiency and welding speed and the incomplete fusion phenomenon is likely to appear are solved.

Description

technical field [0001] The invention relates to a welding method for duplex stainless steel sheets. Background technique [0002] Ferritic-austenitic stainless steel has the advantages of both austenitic steel and ferritic steel. It has the advantages of high strength, high corrosion resistance and easy welding. It has been gradually used in the field of rolling stock manufacturing. Austenitic stainless steel is in During the welding process, ordinary argon arc welding is generally used, the shielding gas is 99.99% argon or active mixed gas shielded welding is used for welding, the shielding gas is 98% argon + 2% carbon dioxide, and the active mixed gas shielded welding has high production efficiency , the advantage of better weld fusion, but it is not suitable for the welding process of stainless steel sheets, and the operability is poor and welding defects are very prone to occur when welding thin sheets. Ordinary argon arc welding is suitable for the welding of stainless...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/23B23K9/235
CPCB23K9/173B23K9/23B23K9/235
Inventor 张强王晓峰杨海史学海牛彦录朱亮郭光辉续连文
Owner CRRC SIFANG CO LTD
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