Method for connecting Cf/LAS composite material via AgCuTi brazing filler metal

A composite material and solder technology, applied in welding/welding/cutting items, welding equipment, manufacturing tools, etc., can solve the problem of negative weight and other problems, and achieve the effect of improving mechanical properties, complete and dense joints, and no cracks

Inactive Publication Date: 2015-06-10
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mechanical connection methods such as riveting have a heavier negative mass, so brazing is the preferred method for connection C f An Ideal Approach to LAS Composites
So far nothing about C f / Literature Reports on LAS Composites Joining

Method used

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  • Method for connecting Cf/LAS composite material via AgCuTi brazing filler metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, a kind of adopting AgCuTi solder to connect C f The method of / LAS composite material is specifically completed according to the following steps: one, the C f / LAS composite material is cut with a semi-automatic internal circle slicer to obtain the C to be joined f / LAS composite material; 2. The C to be connected obtained in step 1 f The connecting surface of / LAS composite material is polished with sandpaper, and then the C f / LAS composite materials were placed in acetone and ultrasonically cleaned for 5min~10min; 3. Put the AgCuTi solder on the C f / LAS composite between the connecting surfaces, assembled into a C f / LAS composite material / AgCuTi solder / C f / LAS composite material assembly, wherein the thickness of the AgCuTi solder foil is 25um~200um, and the Ti content is 1%~10%; 4. Place the assembly obtained in step 3 in a vacuum heating furnace. When the vacuum degree reaches (1.3~2.0)×10 -3 At Pa, turn on the electric heating, control the h...

Embodiment 2

[0025] Embodiment 2. The difference between this embodiment and embodiment 1 is that the thickness of the AgCuTi solder foil in step 3 is 50um~150um, and the Ti content is 3%~7%.

Embodiment 3

[0026] Embodiment 3. The difference between this embodiment and Embodiment 1 is that the thickness of the AgCuTi solder foil in step 3 is 100 um, and the Ti content is 4.5%.

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Abstract

The invention discloses a method for connecting Cf/LAS composite material via an AgCuTi brazing filler metal. The method for connecting Cf/LAS composite material via the AgCuTi brazing filler metal comprises the following steps: step 1, machining the Cf/LAS composite material; step 2, processing the connection surface of the Cf/LAS composite material obtained in the step 1, placing the connection surface of the Cf/LAS composite material in the acetone solution and ultrasonic cleaning; step 3, placing the AgCuTi brazing filler metal between the connection surfaces of the Cf/LAS composite material to be connected, assembling the assembling piece with Cf/LAS composite material/AgCuTi brazing filler metal/Cf/LAS composite material overlapped in sequence; step 4, placing the assembling piece obtained in the step 3 in a vacuum heating furnace, pumping vacuum, electrically heating and cooling; the method for connecting Cf/LAS composite material via the AgCuTi brazing filler metal is mainly used for connecting the Cf/LAS composite material parts being smaller in size or simpler in shape together for obtaining the member being larger in size or complex in shape, the creep resistant property and thermal shock resistance of the high temperature structure can be improved and great application prospect can be achieved.

Description

technical field [0001] The invention relates to a connection method of composite materials, in particular to a connection method using AgCuTi solder to connect C f / LAS composite approach. Background technique [0002] We know that C f / LAS is a continuous carbon fiber reinforced lithium aluminosilicate glass-ceramic matrix composite material. As a new type of composite material, it has many excellent properties, including high strength, high stiffness, excellent toughness, low density and better Excellent wear resistance, has become a very advantageous composite material. At the same time, C f The axial thermal expansion coefficient of carbon fibers in / LAS composites is almost zero, even negative thermal expansion, so C f / LAS composite materials have excellent thermomechanical properties such as good thermal shock resistance and thermal shock resistance. They can be applied to high-temperature heat exchangers, high-temperature windows, radar radomes, various precision...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/20
CPCB23K1/008B23K1/203B23K1/206B23K2103/16
Inventor 刘多牛红伟宋晓国冯吉才周英豪
Owner HARBIN INST OF TECH AT WEIHAI
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