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Method for welding built-in Ni-based high-temperature alloy pipe of C/C composite material

A technology of composite materials and high-temperature alloys, applied in the direction of welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of high structural assembly requirements, low cooling and heat conduction efficiency, and achieve reliable welding effects

Active Publication Date: 2012-11-21
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in the internal mechanical assembly of the C / C composite material with a built-in metal tube cooling structure, the cooling and heat conduction efficiency is not high, and the structural assembly requirements are very high

Method used

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  • Method for welding built-in Ni-based high-temperature alloy pipe of C/C composite material
  • Method for welding built-in Ni-based high-temperature alloy pipe of C/C composite material
  • Method for welding built-in Ni-based high-temperature alloy pipe of C/C composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The size of the C / C composite material is 30×30×10mm, and the C / C composite material is two pieces; the Ni-based superalloy tube is GH600, the wall thickness is 1mm, the diameter is 6.0mm, and the length is 30mm; brazing materials include brazing Material and bonding agent; mix the solder and bonding agent to obtain the brazing material. The composition of the solder is selected from the No. 1 solder in Table 1, and the volume ratio of the solder to the bonding agent is 1:3; The agent is a nitrocellulose solution; the mass content of nitrocellulose in the nitrocellulose solution is 4%, the mass content of ethanol is 20%, and the mass content of ether is 76%;

[0020] 1) Three grooves are cut along the length of the surface of two C / C composite materials. The shape of the grooves is semi-cylindrical. The length of the groove is consistent with the width of the C / C composite material. The radius of the groove is 3.0~3.1. mm; the center distance between each slot is 7mm;

[00...

Embodiment 2

[0026] The size of C / C composite material is 30×30×10mm; the Ni-based superalloy tube is GH600, the wall thickness is 1mm, the diameter is 6.0mm, and the length is 30mm; the brazing material includes brazing filler metal and adhesive; the brazing filler metal Mix with the adhesive to obtain the brazing material. The composition of the brazing filler metal is selected from the No. 2 brazing filler metal in Table 1. The volume ratio of the brazing filler metal to the binder is 1:4; the binder is a nitrocellulose solution; a nitrocellulose solution The mass content of nitrocellulose is 6%, the mass content of ethanol is 24%, and the mass content of ether is 70%;

[0027] 1) Three grooves are cut along the length of the C / C composite material. The shape of the grooves is semi-cylindrical. The length of the groove is the same as the width of the C / C composite material. The radius of the groove is 3.0~3.1mm; The center distance between the slots is 9mm;

[0028] 2) Grind the surface of ...

Embodiment 3

[0033] The size of C / C composite material is 8mm×5mm×5mm; the size of GH600 is 8mm×5mm×5mm; the brazing material includes brazing material and adhesive; the brazing material is obtained by mixing the brazing material and the adhesive. The composition of the solder is selected from the No. 3 solder in Table 1. The volume ratio of solder to the bonding agent is 1:5; the bonding agent is nitrocellulose solution; the mass content of nitrocellulose in the nitrocellulose solution is 6%. The mass content is 24%, and the mass content of ether is 70%;

[0034] 1) Grind the surface of GH600 with 600#SiC sandpaper, clean the GH600 and C / C composite material with ultrasonic + acetone for 30 minutes, and leave it to air dry;

[0035] 2) Coat the brazing material on the surface of the C / C composite material and the surface of the GH600, the thickness of the brazing material is 0.2mm; then place the side of the GH600 coated with the brazing material on the C / C composite material coating There is...

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Abstract

The invention relates to a method for welding a built-in Ni-based high-temperature alloy pipe of C / C composite material, in particular to a method for implementing an effective brazed connection between a C / C composite material and GH600, and belongs to the technical field of built-in metal tubes of C / C composite material. The method comprises the following steps: coating a brazing material on the to-be-welded surfaces of the C / C composite material and the Ni-based high-temperature alloy pipe; placing the Ni-based high-temperature alloy pipe in the C / C composite material to obtain an assembly; and placing the assembly in a vacuum brazing furnace for welding. The method implements the reliable welding between the C / C composite material and the high-temperature alloy pipe by adopting the brazing technology; a molten Ni-based solder connects the two materials effectively and further serves as a conductor for heat flow; and the pressing shearing strength of the obtained assembly is tested, and the test result indicates that the damage of the assembly all occurs in the base material of the C / C composite material.

Description

Technical field [0001] The invention relates to a welding method for a C / C composite material built-in Ni-based high-temperature alloy tube, in particular to a method capable of realizing an effective brazing connection between the C / C composite material and GH600, and belongs to the C / C composite material built-in metal tube technology field. Background technique [0002] C / C composite material structure built-in metal tube is a new and efficient high temperature heat protection method. It is a high-efficiency heat transfer component that utilizes the phase change of the working fluid inside the metal tube or relies on active coolant for heat transfer. This thermal protection structure can withstand long-term heating with high heat flux. [0003] At present, the thermal protection structure with built-in high-temperature alloy tubes mainly adopts the form of mechanical assembly of composite material structure and built-in metal tube. The thermal contact resistance between them g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/19B23K35/30B23K35/363
Inventor 吴永智李海刚毛建英宁立芹毕建勋梁德彬
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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