Glow soldering method for ceramic and metal

A brazing method and glowing technology, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of affecting the quality of brazing, high vacuum requirements, and inability to effectively eliminate residual stress, etc.

Inactive Publication Date: 2002-05-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although this method can carry out brazing of ceramics and metals, the process of using sputtering deposition ion infiltration to form ceramic coating equipment is complicated, the vacuum degree is high, and the cost is high; there is also such a coating in the glow brazing process of ceramics and metals. However, the residual stress caused by the difference in thermal expansion coefficient between ceramics and metals cannot be effectively eliminated, thus affecting the quality of brazing to a certain extent.
[0004] The purpose of the present invention is to overcome the deficiencies of the current glow brazing of ceramics and metals, and propose a brazing method with a simple process and can obviously improve the brazing quality of ceramics and metals

Method used

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  • Glow soldering method for ceramic and metal
  • Glow soldering method for ceramic and metal
  • Glow soldering method for ceramic and metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the glow brazing of ceramics and carbon steel

[0023] Ceramic is Si 3 N 4 , whose size is 10mm×10mm×10mm, the thickness of the electroless copper plating film on the surface to be brazed is 84μm, and the Si with copper film 3 N 4 The ceramics are placed on a 2mm thick Q235 carbon steel plate, and silver-copper solder is added, and then put into a glow furnace together for glow brazing. Glow brazing specifications are:

[0024] Ultimate vacuum 6.6Pa

[0025] Working pressure 15Pa

[0026] Working voltage 950V

[0027] Brazing temperature 830°C

[0028] Warm time 25 minutes

[0029] Working medium argon

[0030] As a result of brazing, a joint with good performance was obtained. There was no unconnected part on the entire joint surface, and the shear strength of the joint was 42MPa.

Embodiment 2

[0031] Embodiment 2, the glow brazing ceramic of ceramic and carbon steel is ZrO 2 , the size of which is 12mm×12mm×8mm, the thickness of electroless nickel-phosphorus film on the surface of the brazed ceramic is 18μm, put the coated ceramic on the Q235 carbon steel plate, add silver-copper solder, and then put them together Glow furnace for glow brazing. Glow brazing specifications are:

[0032] Ultimate vacuum 15Pa

[0033] Working pressure 30Pa

[0034] Working voltage 800V

[0035] Brazing temperature 870°C

[0036] Warm time 20 minutes

[0037] Working medium argon

[0038] As a result of brazing, a joint with good performance was obtained. There was no unconnected part on the entire joint surface, and the shear strength of the joint was 36Mpa.

Embodiment 3

[0039] Example 3 Glow Brazing of Ceramics and Copper

[0040] The ceramic is SiC, with a diameter of φ15mm and a thickness of 8mm. The thickness of the electroless copper plating film on the surface of the brazed ceramic is 40μm. Then put them into a glow furnace together for glow brazing.

[0041] Glow brazing specifications are:

[0042] Ultimate vacuum 8.0Pa Brazing temperature 850℃

[0043] Working pressure 20Pa Holding time 20 minutes

[0044] Working voltage 850V Working medium Argon

[0045] As a result of brazing, a joint with good performance was obtained, and there was no unconnected part on the entire joint surface, and the shear strength of the joint was 50Mpa.

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Abstract

The present invention relates to a glow brazing process for ceramics and metals by using chemically-plated layer as interlayer. Said invented method can simplify glow brazing equipment and technological process, and at the same time can raise the brazing quality. The main technique of said method is characterized by that for ceramics and metals with chemically-plated metal or alloy film whose thickness is 18-84 micrometers, the silver or copper brazing filler metal is filled, then the glow brazing process can be implemented. Said invented glow brazing process is used for high-quality brazing of multiple ceramics and metals.

Description

technical field [0001] The glow brazing method for ceramics and metals proposed by the invention belongs to the technical field of brazing. Background technique [0002] The paper "Ceramics-Metal Glow Brazing Method" (Journal of Taiyuan University of Technology, December 1995, Volume 26, No. 4, P96-98) introduces a kind of glow fiber welding method for ceramics and metals. The heat source is to make active metal titanium etc. form a coating on the surface of the ceramic through sputtering deposition and ion infiltration, and then put the coated ceramic and metal into the Ag-Cu solder and braze in the glow furnace. [0003] Although this method can carry out brazing of ceramics and metals, the process of using sputtering deposition ion infiltration to form ceramic coating equipment is complicated, the vacuum degree is high, and the cost is high; there is also such a coating in the glow brazing process of ceramics and metals. However, it cannot effectively eliminate the resid...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B23K1/008
Inventor张永清王文先赵彭生
OwnerTAIYUAN UNIV OF TECH