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MIG+TIG double-faced welding method for butt joint of stainless steel composite tube or composite plate

A double-sided welding and stainless steel technology, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of poor corrosion resistance of the clad stainless steel side and achieve high welding efficiency, good comprehensive mechanical properties, and excellent welding methods Simple and practical effect

Active Publication Date: 2017-06-09
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The butt welding of stainless steel composite pipe or composite plate usually uses 304L stainless steel wire for single-sided welding and double-sided forming MIG welding, but due to the flow of the molten pool, the low-alloy steel or carbon steel on the base side enters the clad stainless steel side due to the flow of the molten pool. As a result, there is a weld seam where welding wire, cladding, and base materials are mixed, and martensitic structure appears on the cladding stainless steel side, resulting in poor corrosion resistance on the cladding stainless steel side

Method used

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  • MIG+TIG double-faced welding method for butt joint of stainless steel composite tube or composite plate
  • MIG+TIG double-faced welding method for butt joint of stainless steel composite tube or composite plate
  • MIG+TIG double-faced welding method for butt joint of stainless steel composite tube or composite plate

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Embodiment Construction

[0027] Such as figure 1 As shown, a preferred embodiment of the present invention provides a method for butt joint MIG+TIG double-sided welding of stainless steel composite pipe or composite plate, comprising the following steps:

[0028] Step 1, the base layer 1 is provided with a bevel cut, and the stainless steel cladding layer 2 is provided to maintain the original thickness;

[0029] Step 2. Use MIG welding torch 3 to weld the base layer 1, and use TIG welding torch 4 to weld the stainless steel clad layer 2. MIG welding torch 3 and TIG welding torch 4 are welded in the same direction, and the TIG welding torch starts welding before the MIG welding torch.

[0030] Such as figure 1 As shown, the stainless steel clad plate needs to be processed before welding, and the base layer 1 is processed into an inclined cut, while the original thickness of the stainless steel clad layer 2 is retained. Wherein, the base layer is carbon steel or low alloy steel.

[0031] The stainle...

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Abstract

The invention discloses an MIG+TIG double-faced welding method for a butt joint of a stainless steel composite tube or a composite plate. The method comprises the following steps that a base layer is provided with an oblique plane notch, and a stainless steel compound layer keeps the original thickness; secondly, an MIG welding gun is used for welding the base layer, a TIG welding gun is used for welding the stainless steel compound layer, the MIG welding gun and the TIG welding gun carry out welding in the same direction, and the TIG welding gun starts to carry out welding ahead of the MIG welding gun. By means of the MIG+TIG double-faced welding method for the butt joint of the stainless steel composite tube or the composite plate, a weld joint of the stainless steel composite tube has good corrosion resistant performance and also has good comprehensive mechanical performance.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a method for butt-joining MIG+TIG double-sided welding of stainless steel composite pipes or composite plates. Background technique [0002] Stainless steel composite pipes or composite plates are mainly used in salinization projects, petrochemical projects, environmental protection equipment, anti-corrosion equipment, chemical storage tanks and pipelines, lead smelting pots, drying equipment, water conservancy projects, granary equipment, water purification equipment, composite plates for coal hoppers , Composite steel plates for water supply pipelines, for desulfurization towers, heat exchangers, papermaking equipment, oil refining equipment, crucibles, caustic soda equipment, pulp towers, etc. The application of composite plates must be inseparable from the welding of composite pipes or composite plates. The main purpose of using stainless steel composite pipe or composite p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K28/02
CPCB23K9/16B23K28/02
Inventor 张跃龙华学明李芳牟刚王敏蔡艳杨海澜
Owner SHANGHAI JIAO TONG UNIV
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