Liquid Phase Diffusion Bonding Method of Quartz Composite Ceramics and Iron-Nickel Alloy

A composite ceramic, iron-nickel alloy technology, applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., can solve the problems of low connection efficiency, complex structure, decreased joint strength, etc., to achieve stable and reliable quality and environmental protection. Strong adaptability and the effect of reducing the connection temperature

Active Publication Date: 2017-01-25
湖北三江航天江北机械工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical connection is mainly fixed by bolts. The biggest problem is that the stress environment at the fixed position of the material is not good, and there is stress concentration at the opening of the ceramic, which is easy to cause cracks; the bonding mainly uses organic adhesives, and the joint strength will decrease significantly at high temperatures. ;Due to the complex structure of some devices, the traditional brazing connection technology is difficult to place the solder, and the fillet size is not easy to control, so it cannot fully meet the device requirements; Diffusion welding requires precise control of pressure, the connection efficiency is low, and large areas cannot be achieved when the deformation rate is small welding

Method used

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  • Liquid Phase Diffusion Bonding Method of Quartz Composite Ceramics and Iron-Nickel Alloy
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  • Liquid Phase Diffusion Bonding Method of Quartz Composite Ceramics and Iron-Nickel Alloy

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Experimental program
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Effect test

Embodiment 1

[0026] The liquid phase diffusion connection method of the quartz composite ceramic ring 4 and the iron-nickel alloy ring 2 selected in this embodiment 1 comprises the following steps:

[0027] 1) Surface cleaning: Use acetone to clean the connection surface of the iron-nickel alloy; use the electroless nickel plating process to nickel-plate the connection surface of the quartz composite ceramic. The electroless nickel plating process includes degreasing, roughening, sensitization, activation, and reduction And six steps of plating;

[0028] 2) Intermediate layer alloy foil 3: Au-Ge intermediate layer alloy ring 3 prepared with trace amounts of Ni, Ag, and Cu elements has a thickness of d / 2, wherein the content of Au is 82%, the content of Ge is 15%, the content of Ni is 1.5%, and the content of Ag Content 0.5%, Cu content 1%, d is the assembly gap;

[0029] 3) Joint assembly clearance design: according to the formula L 1 +α 1 ·L 1 (t 2 -t 1 ) = L 2 +α 2 ·L 2 (t 2 -t...

Embodiment 2

[0034] The liquid phase diffusion connection method of the quartz composite ceramic ring 4 and the iron-nickel alloy ring 2 selected in this embodiment 2 comprises the following steps:

[0035] 1) Surface cleaning: Use acetone to clean the connection surface of the iron-nickel alloy; use the electroless nickel plating process to nickel-plate the connection surface of the quartz composite ceramic. The electroless nickel plating process includes degreasing, roughening, sensitization, activation, and reduction And six steps of plating;

[0036] 2) Intermediate layer alloy foil 3: Au-Ge intermediate layer alloy ring 3 prepared with trace amounts of Ni, Ag, and Cu elements has a thickness of d / 2, wherein the content of Au is 75%, the content of Ge is 22%, the content of Ni is 1.5%, and the content of Ag Content 1%, Cu content 0.5%, d is the assembly gap;

[0037] 3) Joint assembly clearance design: according to the formula L 1 +α 1 · L 1 (t 2 -t 1 ) = L 2 +α 2 · L 2 (t 2 ...

Embodiment 3

[0042] The liquid phase diffusion connection method of the quartz composite ceramic ring 4 and the iron-nickel alloy ring 2 selected in this embodiment 3 comprises the following steps:

[0043] 1) Surface cleaning: Use acetone to clean the connection surface of the iron-nickel alloy; use the electroless nickel plating process to nickel-plate the connection surface of the quartz composite ceramic. The electroless nickel plating process includes degreasing, roughening, sensitization, activation, and reduction And six steps of plating;

[0044] 2) Intermediate layer alloy foil 3: Au-Ge intermediate layer alloy ring 3 prepared with trace amounts of Ni, Ag, and Cu elements has a thickness of d / 2, wherein the content of Au is 90%, the content of Ge is 7%, the content of Ni is 1%, and the content of Ag Content 1%, Cu content 1%, d is the assembly gap;

[0045] 3) Joint assembly clearance design: according to the formula L 1 +α 1 · L 1 (t 2 -t 1 ) = L 2 +α 2 · L 2 (t 2 -t 1...

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Abstract

The invention discloses a liquid-phase diffusion bonding method for quartz composite ceramic and an iron-nickel alloy. The liquid-phase diffusion bonding method comprises the following steps: surface cleaning is performed: the bonding surface of the iron-nickel alloy is cleaned with acetone, and nickel plating is performed on the bonding surface of the quartz composite ceramic with a chemical nickel plating process; an interlayer alloy is prepared: foil with a certain thickness is prepared from the interlayer alloy containing trace Ni, Ag and Cu elements; joint assembling clearance is designed; liquid-phase diffusion bonding is performed: the quartz composite ceramic material, the interlayer alloy and the iron-nickel alloy are assembled by a tool and placed into a vacuum furnace, nitrogen is introduced for protection, heat is preserved for 15-60 min at the temperature of 380-550 DEG C, and the cooling with the furnace is performed. The bonding joint of the quartz composite ceramic and the iron-nickel alloy is stable, the bonding strength is high, high-temperature resistance is realized, and the liquid-phase diffusion bonding method is particularly applicable to bonding of the quartz composite ceramic material and the iron-nickel alloy material which have large sizes.

Description

technical field [0001] The invention relates to the technical field of connection of dissimilar materials, in particular to a liquid phase diffusion connection method of quartz composite ceramics and iron-nickel alloy. Background technique [0002] With the continuous development and progress of military technology, full maneuverability, supersonic flight and precise guidance have become the development direction of tactical ballistic missile weapons. The traditional bonding method of resin-based anti-insulation materials can no longer meet the harsh working environment requirements. New ceramic matrix composite materials and their connection technology have become technical problems that must be solved to break through this key technology. [0003] At present, the methods of mechanical connection, bonding, brazing or diffusion welding are mainly used. The mechanical connection is mainly fixed by bolts. The biggest problem is that the stress environment at the fixed positio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/00
CPCB23K20/02B23K20/026B23K2103/18
Inventor 王芬佘平江孙晓莉雷宁吴广力尹正帅
Owner 湖北三江航天江北机械工程有限公司
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