Connection method for dissimilar metal welding test plates

A technology of dissimilar metals and connection methods, applied in welding/welding/cutting items, welding equipment, welding accessories, etc., can solve the problems of easy generation of hard and brittle phases, unavailability, welding cracks, etc., to achieve less melting, easy The effect of fast cooling of processing and welding seam

Inactive Publication Date: 2020-08-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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Problems solved by technology

At present, the connection of dissimilar materials is mainly done by traditional fusion welding, where two welding materials with completely different components and properties are melted in one weld. crack
Therefore, dissimilar material welds become weak points in quality

Method used

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  • Connection method for dissimilar metal welding test plates
  • Connection method for dissimilar metal welding test plates

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0015] Such as figure 1 As shown, the material of the first welding test plate is 304, the size is 150×400mm, and the thickness is 10mm. The material of the second welding test plate is Q345, the size is 150×400mm, and the thickness is 10mm. The first type of welding test plate and the second type of welding test plate are butt-jointed with a V-shaped groove, the groove angle is 70°, and the blunt edge is 2 mm.

[0016] The laser cladding process was used to clad the groove surface of the first type of welding test plate with pure iron powder to form a transition layer weld 3 . The surface of the transition layer weld is parallel to the groove surface of the first type of welding test plate, with a thickness of 2mm. In order to ensure the quality of the transition layer weld, laser cladding needs to be protected by pure Ar. The specific welding parameters are show...

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Abstract

Disclosed is a connection method for dissimilar metal welding test plates, comprising the following steps: 1) V-shaped grooves are provided on two types of welding test plates in a butt joint manner;2) the surface of the groove on one side of the first type of welding test plate is clad to form a transition layer welding line; a laser cladding or plasma spraying process is used for the transitionlayer welding line; a filling material is the same as the material of the second type of welding test plate; the surface of the transition layer welding line is parallel to the surface of the grooveon one side of the first type welding test plate; and the thickness is 0.2-10 mm; and 3) the surface of the transition layer welding line is cleaned; and the two types of welding test plates are welded in a butt joint manner to form a connection welding line. The groove design and the welding process are matched, so that materials on both sides of the groove are changed from dissimilar to similar,the welding difficulty is reduced, the quality of the welding line is guaranteed, the high-quality and high-efficiency welding of dissimilar metal is achieved, and the advantages of the dissimilar metal are fully exerted.

Description

Technical field: [0001] The invention relates to the technical field of welding of dissimilar materials, in particular to a connection method for welding test plates of dissimilar metals. Background technique: [0002] In recent years, with the increasing demand for lightweight materials, corrosion resistance, wear resistance, etc., materials are required to have different properties in different parts, and the demand for joining dissimilar materials is increasing day by day. At present, the connection of dissimilar materials is mainly done by traditional fusion welding, where two welding materials with completely different components and properties are melted in one weld. crack. Therefore, dissimilar material welds become weak points in quality. Invention content: [0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a method for connecting dissimilar metal welding test plates. By matching the groove ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/235B23K9/32C23C24/10B23K31/02B23K103/18
CPCB23K9/173B23K9/235B23K9/32B23K31/02B23K2103/18C23C24/106
Inventor 田磊毕宗岳韦奉牛爱军张万鹏黄晓辉王盼祝少华王璟丽
Owner BC P INC CHINA NAT PETROLEUM CORP
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