Amorphous composite brazing filler metal for brazing ceramic and alloy

A composite solder and alloy technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of component fracture, affecting the use of components, poor joint performance of brazed joints, etc., and achieve enhanced shear resistance ability, the effect of improving mechanical properties

Pending Publication Date: 2019-08-23
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing brazing process is widely used because of its simple process and low cost. However, when brazing filler metals are used to braze ceramics and alloys, the joints of the brazing joints are likely to be poor due to the characteristics of the brazing filler metals, and the structural strength Poor, thus reducing the shear strength of the brazed joint, causing the parts to break during use, affecting the use of the corresponding parts

Method used

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  • Amorphous composite brazing filler metal for brazing ceramic and alloy
  • Amorphous composite brazing filler metal for brazing ceramic and alloy
  • Amorphous composite brazing filler metal for brazing ceramic and alloy

Examples

Experimental program
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Embodiment 1

[0025] A kind of ZrB for brazing 2 -SiC ultra-high temperature ceramics and amorphous solder of Ti-6Al-4V alloy, amorphous solder includes double-layer CuTiZrNi solder and foamed Cu intermediate layer, and foamed Cu intermediate layer is filled between double-layer CuTiZrNi solder, CuTiZrNi The atomic percentages of the solder are Cu: 41.83, Ti: 30.21, Zr: 19.76, and Ni: 8.19.

[0026] A kind of ZrB for brazing 2 -The brazing method of the amorphous solder of SiC ultra-high temperature ceramics and Ti-6Al-4V alloy, comprises the following steps successively:

[0027] Step 1: Take ZrB with a volume ratio of 4:1 2 powder and SiC powder as raw material for batching, ZrB 2 The purity of the powder is 99%, the particle size is 2 μm, and the SiC powder is α-SiC, the purity is 99%, the particle size is 1 μm, take ethanol as the ball milling medium, and then ZrB 2 The powder and SiC powder raw materials are mixed and placed in a planetary grinder for ball milling with zirconia bal...

Embodiment 2

[0033] The difference between this embodiment and embodiment 1 is that the heat preservation time in step 5 is 20min.

[0034] Others are with embodiment 1.

Embodiment 3

[0036]The difference between this embodiment and embodiment 1 is that the heat preservation time in step 5 is 50min.

[0037] Others are with embodiment 1.

[0038] The present invention adopts above-mentioned 3 embodiments, and the content of further experimental analysis is as follows:

[0039] When the brazed joint was held at 910°C for 10 minutes, no obvious pores were observed in the brazed joint; at this time, the thickness of the weld was about 150 μm, which was smaller than the thickness of the foamed Cu intermediate layer, because the foamed Cu intermediate layer has a large porosity, Therefore, the foamed Cu interlayer is easily compressed during the brazing process, so after brazing, the 0.5 mm thick foamed Cu interlayer is compressed to only about 150 μm;

[0040] When the brazed joint is kept at 910°C for 20 minutes, the sample with the foamed Cu interlayer can obtain a brazed joint without any defects, and two continuous reaction layers are detected on both side...

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Abstract

The invention relates to a composite brazing filler metal layer for brazing ceramic and alloy, and belongs to the field of brazing filler metal. The brazing filler metal comprises a double-layer CuTiZrNi amorphous brazing filler metal and a foam Cu intermediate layer, and the foam Cu intermediate layer is filled between the double-layer CuTiZrNi amorphous brazing filler metal, and the atomic percentage of the CuTiZrNi brazing filler metal is Cu: 41.83, Ti: 30.21, Zr:19.76 and Ni:8.19. A foam Cu intermediate layer is added into the CuTiZrNi amorphous brazing filler metal, the brazing temperature is kept at 910 DEG c for 20 minutes, plastic deformation is generated between the brazing filler metal and the foam Cu intermediate layer,and the brazing filler metal and the foam cu intermediate layer are in close contact with each other, the surface of the base material is wetted, so that part of the base material is also dissolved in the molten brazing filler metal, a staggered structure isgenerated, so that the mechanical property of the ceramic and alloy connectivity is improved, the bonding strength of the interface is improved, the stress is effectively released, the cracking tendency is inhibited, so that the weld joint has good joint performance, and the negative influence of the hardening and the ductility of the braze welding head on the bonding strength is avoided;

Description

technical field [0001] The invention relates to the field of brazing solder, in particular to an amorphous composite solder used for brazing ceramics and alloys. Background technique [0002] Ceramics have a high melting point, excellent resistance to oxidation and thermal shock, and excellent chemical stability. However, due to its machinability and brittleness, it is difficult to process this kind of ceramics into parts with complex shapes, so when in use, brazing is mostly used to connect ceramics and alloys to meet the needs of use. [0003] The existing brazing process is widely used because of its simple process and low cost. However, when brazing filler metals are used to braze ceramics and alloys, the joints of the brazing joints are likely to be poor due to the characteristics of the brazing filler metals, and the structural strength Poor, thereby reducing the shear strength of the brazed joint, causing the parts to break during use, and affecting the use of the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K1/00B23K1/20B23K103/18
CPCB23K1/0008B23K1/20B23K35/302B23K2103/18
Inventor 王刚桂凯旋邢昌蔡颖军
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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