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High-temperature brazing filler metal for brazing Si3N4 ceramic and stainless steel, preparing method and brazing process

A high-temperature brazing filler metal and stainless steel technology, used in manufacturing tools, welding equipment, welding/cutting media/materials, etc., can solve the problems of low joint strength and high stress, improve mechanical properties and heat resistance, and reduce residual Stress, easy and fast implementation

Inactive Publication Date: 2015-06-24
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to overcome the existence of Si in the prior art 3 N 4 For the problems of excessive residual stress and low joint strength in the connection between ceramics and stainless steel, the invention provides a brazing Si 3 N 4 High temperature solder for ceramics and stainless steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Si 3 N 4 Vacuum brazing of ceramic and austenitic stainless steel butt joints: Si 3 N 4 The size of the ceramic sample is 20mm×20mm×5mm, the austenitic stainless steel is 1Cr18Ni9Ti stainless steel, the size is 20mm×20mm×5mm, and the surface to be brazed is 20mm×5mm.

[0050] The composition and mass percentage ratio of solder are: Zr: 12%; Cu: 14%; Ni: 12%; V: 6.0%; Be: 2.0%; Cr: 3.0%; Si: 0.3%; the rest is Ti. The thickness of the solder is 20 μm.

[0051] Brazing Si 3 N 4 The preparation method of the high-temperature solder of ceramics and stainless steel:

[0052] (1) Weigh zirconium sponge, copper block, nickel particles, vanadium powder, beryllium powder, chromium particles, sponge silicon and sponge titanium according to mass percentage to prepare a mixture;

[0053](2) Add acetone to the container containing the mixture, stir to obtain a suspension, and then seal the container, wherein the volume ratio of the mixture to acetone is 1:10;

[0054] (3) Per...

Embodiment 2

[0067] Si 3 N 4 Vacuum brazing of ceramic and austenitic stainless steel butt joints: Si 3 N 4 The size of the ceramic sample is 20mm×20mm×5mm, the austenitic stainless steel is 1Cr18Ni9Ti stainless steel, the size is 20mm×20mm×5mm, and the surface to be brazed is 20mm×5mm.

[0068] The composition and mass percentage ratio of solder are: Zr: 15%; Cu: 18%; Ni: 14%; V: 10%; Be: 4.0%; Cr: 5.0%; Si: 0.7%; the rest is Ti. The thickness of the solder is 100 μm.

[0069] Brazing Si 3 N 4 The preparation method of the high-temperature solder of ceramics and stainless steel:

[0070] (1) Weigh zirconium sponge, copper block, nickel particles, vanadium powder, beryllium powder, chromium particles, sponge silicon and sponge titanium according to mass percentage to prepare a mixture;

[0071] (2) Add acetone to the container containing the mixture, stir to obtain a suspension, and then seal the container, wherein the volume ratio of the mixture to acetone is 1: 20;

[0072] (3) P...

Embodiment 3

[0085] Si 3 N 4 Vacuum brazing of ceramic and austenitic stainless steel butt joints: Si 3 N 4 The size of the ceramic sample is 20mm×20mm×5mm, the austenitic stainless steel is 1Cr18Ni9Ti stainless steel, the size is 20mm×20mm×5mm, and the surface to be brazed is 20mm×5mm.

[0086] The composition and mass percentage ratio of solder are: Zr: 13.5%; Cu: 16%; Ni: 13%; V: 8.0%; Be: 3.0%; Cr: 4.0%; Si: 0.5%; the rest is Ti. The thickness of the solder is 60 μm.

[0087] Brazing Si 3 N 4 The preparation method of the high-temperature solder of ceramics and stainless steel:

[0088] (1) Weigh zirconium sponge, copper block, nickel particles, vanadium powder, beryllium powder, chromium particles, sponge silicon and sponge titanium according to mass percentage to prepare a mixture;

[0089] (2) Add acetone to the container containing the mixture, stir to obtain a suspension, and then seal the container, wherein the volume ratio of the mixture to acetone is 1:15;

[0090] (3) ...

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Abstract

The invention discloses high-temperature brazing filler metal for brazing Si3N4 ceramic and stainless steel. The high-temperature brazing filler metal is characterized in that the brazing filler metal is composed of, by weight, 12-15% of Zr, 14-18% of Cu, 12-14% of Ni, 6.0-10% of V, 2.0-4.0% of Be, 3.0-5.0% of Cr, 0.3-0.7% of Si, and the balance Ti. The invention further discloses a preparing method of the brazing filler metal and a brazing process. According to the brazing process that the brazing filler metal connects the Si3N4 ceramic and the stainless steel, through vacuum brazing connection, samples are in a vacuum atmosphere in the heating process, oxidization, pollution and the like are avoided, the surface wetting spreading of the samples is better, brazing seams are filled beneficially, joint strength is improved, and thus stable and reliable welding joints can be obtained.

Description

technical field [0001] The invention relates to the connection of dissimilar materials, in particular to a connection material and a brazing process for connecting Si3N4 ceramics and stainless steel, and belongs to the field of welding technology. Background technique [0002] Si3N4 ceramic material has unique properties such as high strength, high temperature resistance, and corrosion resistance. It is a promising engineering structural ceramic material. It is widely used in components such as heat exchangers, but its shortcomings such as high brittleness, scattered strength, and difficult processing limit its application as an integral mechanism in engineering. It is of great importance and significance to realize the reliable connection between ceramics and metals or between ceramics and ceramics, and to expand the application fields of ceramics. [0003] The connection between ceramic and metal is mainly active brazing and diffusion welding. Due to the large differenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32B23K35/40B23K1/008
CPCB23K35/325B23K1/008B23K35/40
Inventor 许祥平王锡岭杨骏杨家旺夏春智邹家生
Owner JIANGSU UNIV OF SCI & TECH
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