Filler wire argon tungsten arc process of super nickel/NiCr stacking compound material

A technology of argon tungsten arc welding and composite materials, which is applied in the direction of arc welding equipment, welding/welding/cutting items, manufacturing tools, etc., to achieve the effect of beautiful weld shape, good manufacturability, and non-porous interface fusion

Inactive Publication Date: 2010-01-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the welding research of Super-Ni / NiCr laminated composite materials in domestic and foreign literature.

Method used

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  • Filler wire argon tungsten arc process of super nickel/NiCr stacking compound material
  • Filler wire argon tungsten arc process of super nickel/NiCr stacking compound material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Butt-filled wire tungsten arc welding of Super-Ni / NiCr laminated composite materials with a test plate size of 100mm×100mm×2.5mm. Take two laminated composite materials of the same size and specifications, butt weld them, and do not open grooves at the joints.

[0030] Before welding, the pure nickel clad layer at the welded joint of the Super-Ni / NiCr laminated composite material is machined off, and processed into such as figure 1 Connector form shown. It is required that the joints to be processed should be flat and the base layer should be exposed, and the base layer should be polished with sandpaper until a metallic luster appears. Cr25-Ni13 alloy welding wire with a diameter of 2.0mm is used as the filler metal, and the surface of the welding wire is polished with sandpaper before welding. The two processed Super-Ni / NiCr laminated composite test plates are assembled horizontally at the joints, and the assembly gap is less than 0.5mm. Tungsten argon arc welding w...

Embodiment 2

[0034] Filled tungsten argon arc welding of Super-Ni / NiCr laminated composite material and 1Cr18Ni9Ti austenitic stainless steel. The size of the Super-Ni / NiCr laminated composite test plate is 80mm×80mm×2.5mm, and the size of the 1Cr18Ni9Ti austenitic stainless steel test plate is 80mm×80mm×2.5mm. The two plates are butt welded, and no groove is made at the joint.

[0035]Before welding, the pure nickel clad layer at the welded joint of the Super-Ni / NiCr laminated composite material is machined off, and processed into such as figure 2 Connector form shown. It is required that the joints to be processed should be flat and the base layer should be exposed, and the base layer should be polished with sandpaper until a metallic luster appears. Cr25-Ni13 alloy welding wire with a diameter of Φ2.5mm is used as the filler metal, and the surface of the welding wire is polished with sandpaper. The processed Super-Ni / NiCr laminated composite material is fixedly assembled with the 1C...

Embodiment 3

[0039] Filled tungsten argon arc welding of Super-Ni / NiCr laminated composite material and 1Cr18Ni9Ti austenitic stainless steel.

[0040] (1) Before welding, the pure nickel clad layer at the joint of super nickel / NiCr laminated composite material to be welded is machined off, and the processed place is required to be flat, the base layer is exposed, and the base layer is polished with sandpaper until a metallic luster appears;

[0041] (2) Use Cr-Ni alloy welding wire with a diameter of 2.5mm as the filler metal, and polish its surface with sandpaper until it reveals a metallic luster;

[0042] (3) Surface treatment of stainless steel joints of butt joints to be welded: acid solution (5% HF aqueous solution and 35% HNO 3 A mixture of aqueous solution) to pickle the joints, rinse with clean water until the surface of the stainless steel joints shows metallic luster until neutral, dry, and set aside; ,spare;

[0043] (4) process the super nickel / NiCr laminated composite mate...

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Abstract

The invention discloses a filler rod argon tungsten arc process for a Super-Ni / NiCr laminated composite material and a dissimilar stainless steel material. The process comprises the steps of removing a Super-Ni multilayer on the joint to be welded on the Super-Ni / NiCr laminated composite material to expose a base layer before welding as shown by the attached figure; polishing the base layer and the stainless steel joint with sand paper until metallic luster appears; taking Cr25-Ni13 alloy system welding wire as a filler metal, and adopting manual rod-filling argon tungsten-arc welding to weld in a horizontal position. The technological parameters of the argon tungsten-arc welding are as follows: the welding voltage is 10-13V, the welding current is 80-110A, the argon flow rate is 8-15L / min, and argon arc short arc is kept down to weld. The method is applicable to welding the Super-Ni / NiCr laminated composite material under the conditions of heat, corrosion and high temperature resistance, particularly to welding the laminated composite material with the dissimilar stainless steel material. The welding joint obtained has the advantages of aesthetic welding seam, no crack or air hole, good interface fusion, and joint strength close to parent metal, with the elongation ratio being more than 30%.

Description

technical field [0001] The invention relates to a welding process of super nickel (Super-Ni) / NiCr laminated composite materials, in particular to a wire-filled argon arc welding between Super-Ni / NiCr laminated composite materials or with stainless steel dissimilar materials The technology belongs to the field of welding technology. Background technique [0002] The Super-Ni / NiCr laminated composite material of the present invention is a laminated plate made by super-nickel (Super-Ni) clad layer and NiCr alloy base layer by vacuum isostatic rolling and superplastic forming, It is a new type of high temperature structural material. This laminated composite material uses pure nickel as a toughened layer, which has better high temperature resistance and fatigue resistance than a single material. Connecting this Super-Ni / NiCr laminated composite material with other materials to form a composite structure can reduce the quality of components and exert their respective performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/235B23K9/095B23K103/18
Inventor 李亚江王娟夏春智
Owner SHANDONG UNIV
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