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
CN110153591APending Publication Date: 2019-08-23ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
Publication Date
2019-08-23

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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;
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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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