Amorphous brazing process for super nickel laminated composite material

A technology of composite material and brazing process, which is applied in the direction of welding/cutting medium/material, welding equipment, manufacturing tools, etc., can solve the problems of increased welding difficulty, achieve the effect of improving performance, avoiding burning phenomenon, and reliable performance

Inactive Publication Date: 2012-06-13
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this fusion welding method is used to weld super nickel laminated composites of the same material, the welding difficulty increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Butt brazing is carried out between super-nickel laminated composite plates with a thickness of 2.6mm. The length of the parts to be connected is 30mm and the width is 10mm. The thickness of the cladding layer of the super nickel laminated composite material is 0.3 mm, and the thickness of the Ni-Cr base layer is 2.0 mm.

[0027] The specific high temperature vacuum brazing process steps are as follows:

[0028] (1) According to the shape of the parts to be connected, cut the foil-shaped Ni-Cr-Si-B amorphous solder into 30×2.8mm 2 The rectangle (may be slightly larger than the brazing area).

[0029] (2) Before welding, place the parts to be connected in acetone solution and ultrasonically clean them for 4 minutes, take them out, rinse them with cold water and dry them. Grind with 600# sandpaper to remove the oxide film on the surface of the super nickel laminated composite material and foil-shaped solder, rinse with alcohol and blow dry.

[0030] (3) Place the part...

Embodiment 2

[0035] The super-nickel laminated composite material with a thickness of 3mm is connected at right angles, and the length of the connected piece is 30mm and the width is 20mm. The thickness of the cladding layer of the super nickel laminated composite material is 0.3m, and the thickness of the Ni-Cr alloy base layer is 2.4mm.

[0036] The specific vacuum high temperature brazing process steps are as follows:

[0037] (1) Grind the joints of the super nickel laminated composite material into a bevel angle of 45°, and calculate the brazing area according to the size of the parts to be connected to be 30×4.2mm 2， , Punch and cut the foil-shaped solder according to the brazing area.

[0038] (2) Place the parts to be connected in an acetone solution for ultrasonic cleaning for 3 minutes, take them out, rinse them with clean water, and dry them. Grind with 600# sandpaper to remove the oxide film on the surface of the super nickel laminated composite material and Ni-Cr-Si-B amorph...

Embodiment 3

[0044] Butt brazing is carried out between super-nickel laminated composite plates with a thickness of 2.6mm. The length of the parts to be connected is 30mm and the width is 10mm. The thickness of the cladding layer of the super nickel laminated composite material is 0.3 mm, and the thickness of the Ni-Cr base layer is 2.0 mm.

[0045] (1) According to the shape of the parts to be connected, cut the foil-shaped Ni-Cr-Si-B amorphous solder into 30×2.8mm 2 The rectangle (may be slightly larger than the brazing area).

[0046] (2) Before welding, place the parts to be connected in a sodium hydroxide solution for ultrasonic cleaning for 5 minutes, take them out, rinse them with clean water, and dry them. Use pickling to remove the oxide film on the surface of the super nickel laminated composite material and the foil-shaped amorphous solder to be connected, that is, place the parts to be connected in HNO 3 In an aqueous solution with a content of 15% (volume percentage) and a ...

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Abstract

The invention relates to an amorphous brazing process for super nickel laminated composite materials. The amorphous brazing process comprises the following steps of: (1) cleaning surfaces, to be connected, of super nickel laminated composite materials and foil-shaped Ni-Cr-Si-B amorphous brazing filler metal before welding so as to remove oil stains and oxide films on the surfaces, and carrying out drying treatment; (2) placing the foil-shaped Ni-Cr-Si-B amorphous brazing filler metal between the super nickel laminated composite materials, and fixing members to be connected by using a stainless steel plate; (3) brazing the assembled members, to be connected, of the super nickel laminated composite materials in a vacuum heating furnace; and (4) controlling cooling speed to be 20-50 DEG C/min, cooling a vacuum chamber to be below 100 DEG C, and taking out a brazed member. According to the process, a favorably formed connector can be obtained without adding brazing flux, an operating requirement of a structural member of the super nickel laminated composite materials at the high temperature of 800-1000 DEG C is met, and the high-temperature performance of the super nickel laminated composite materials is exerted.

Description

technical field [0001] The invention relates to a vacuum brazing process of laminated composite materials, in particular to an amorphous brazing process of super nickel laminated composite materials, and belongs to the technical field of material welding. Background technique [0002] Super nickel laminated composite material is a new type of material newly developed in recent years, which is made of super nickel clad layer and Ni-Cr alloy base layer by vacuum pressing. attention of national researchers. The advantage of this composite material is that the super nickel clad layer has good high temperature oxidation resistance and corrosion resistance; while the Ni-Cr alloy base layer has the advantages of low density, high strength, low cost, etc., the super nickel clad layer and Ni- Cr alloy base layers can give full play to their respective performance advantages when they are combined together. Super nickel laminated composites can reduce structural weight and improve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/19B23K1/20B23K35/30
Inventor 李亚江李嘉宁吴娜王娟
Owner SHANDONG UNIV
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