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Welding method for ultra-thin composite layer low-carbon steel - austenitic stainless steel multiple tube adaptor

A technology of austenitic stainless steel and welding method, which is applied in the welding of low-carbon steel composite materials and the field of stainless steel, which can solve problems such as easy to make mistakes and complicated welding process, and achieve the effect of preventing intergranular corrosion

Active Publication Date: 2006-08-02
XI AN JIAOTONG UNIV +1
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Problems solved by technology

At present, the general composite pipe welding method is to divide the welded joint into composite layer welds, transition layer welds and base layer welds for welding separately. The welding materials of composite layer welds and transition layer welds are all stainless steel materials with different components. Production Frequent replacement of welding rods is required in the process, which is easy to make mistakes and the welding process is complicated

Method used

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  • Welding method for ultra-thin composite layer low-carbon steel - austenitic stainless steel multiple tube adaptor
  • Welding method for ultra-thin composite layer low-carbon steel - austenitic stainless steel multiple tube adaptor

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Embodiment Construction

[0017] Embodiments of the invention will be further described below with reference to the accompanying drawings:

[0018] see figure 1 , 2 , taking 20 steel and OCr18Ni9 austenitic stainless steel composite pipe as an example, in the figure, the carbon steel base layer 1 is 20 steel, the wall thickness is 3mm; the stainless steel composite layer 2 is OCr18Ni9 austenitic stainless steel, the wall thickness is 0.5mm; the groove angle 70°; gap 2mm; when manual argon tungsten arc welding is used for transition layer weld 3, the diameter of the welding wire is Φ2.0mm; when manual arc welding is used for transition layer weld 3, the diameter of the electrode is Φ2.5mm.

[0019] Adopt the method of argon arc welding transition layer weld 3 and arc welding base weld 4, argon arc welding adopts ultra-low carbon 25-13 austenitic stainless steel welding wire, arc welding base weld 4 adopts the method corresponding to the base material When welding the transition layer with argon arc we...

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Abstract

The invention discloses a welding method for low carbon steel-austenite stainless steel compound pipe of ultra-thin stainless composite bed. The character is: the welding is completed with transition layer welding seam and base layer welding, it hasn't single stainless steel composite bed seam; the welding rod for low carbon steel base layer seam is the same to the one for mother metal; the first welding for stainless steel composite layer and the transition layer between the stainless composite layer and the low carbon steel base layer use argon tungsten-arc welding with back argon filling protection, or uses manual arc welding; the welding wire or welding rod use stainless steel in order to form the transition welding seam; after the transition welding seam is completed, the second time uses manual arc welding to weld the low carbon steel base layer, the welding rod uses low carbon steel in order to form base layer welding seam.

Description

technical field [0001] The invention relates to a welding method of stainless steel and low-carbon steel composite materials, in particular to a welding method of a low-carbon steel-austenitic stainless steel composite pipe with an ultra-thin-wall stainless steel composite layer. Background technique [0002] No similar stainless steel-carbon steel composite pipe welding method has been found through patent retrieval. In the current general stainless steel-carbon steel composite pipe, the thickness of the stainless steel composite layer is generally more than 2mm, while the thickness of the stainless steel composite layer involved in the present invention is less than 1mm, and This type of composite pipe is widely used, but the corresponding welding method has not yet been searched. Because the low-carbon steel-austenitic stainless steel composite pipe with ultra-thin-wall composite layer has certain difficulties in welding, mainly how to ensure the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/23B23K9/028B23K35/24
Inventor 薛锦张燕飞潘希德郭霖王能利潘建新王裕文
Owner XI AN JIAOTONG UNIV
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