Diffusion and connection method for ceramic and steel by adding active intermediate alloy

An intermediate alloy and diffusion bonding technology, which is applied in the diffusion bonding of ceramics and steel, adding active intermediate alloys in the field of diffusion bonding ceramics and steel, can solve the problems of the limited application range of precious metal brazing ceramics and steel dissimilar materials, and achieve effective Good for diffusion reaction, simple and convenient process, strong applicability

Inactive Publication Date: 2008-11-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the impact of welding costs, the application range of brazing ceramic and steel dissimilar materials with precious metal brazing filler metals is greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Diffusion connection of ceramics with a diameter of φ50mm×3mm and high-speed tool steel with a diameter of φ50mm×2mm.

[0023] The specific process steps are as follows:

[0024] (1) The surface to be welded of high-speed tool steel with a diameter of φ50mm×2mm is pickled with 10% sulfuric acid for 8-10 minutes, washed with clean water, and dried; the surface of the steel to be welded is polished with metallographic sandpaper to make the surface roughness Reach Ra 2.5 ~ 5.2μm; then wipe the surface with alcohol and blow dry. In addition, scrub the surface of the ceramic with a diameter of φ50mm × 3mm to be welded with alcohol, and dry it.

[0025] (2) Between the contact surfaces of the ceramic and the steel to be welded, in the order of ceramic-titanium foil+copper foil+titanium foil-high-speed tool steel, place a titanium foil with a thickness of 15μm and a copper foil active master alloy with a thickness of 110μm, and use Press up and down the head.

[...

Embodiment 2

[0028] Example 2: Diffusion connection of 100mm×40mm×5mm ceramic plate and 100mm×40mm×5mm 1Cr18Ni9Ti stainless steel plate.

[0029] The specific process steps are as follows:

[0030] (1) Pickle the surface of the 1Cr18Ni9Ti stainless steel sheet with 15% hydrochloric acid for 6-9 minutes, rinse with water, and blow dry; polish the surface of the stainless steel to be welded with metallographic sandpaper to make the surface roughness Ra 2.5-4.0 μm; , then wipe the surface clean with alcohol and blow dry. In addition, scrub the surface of the ceramic to be welded with alcohol and dry it.

[0031] (2) Between the ceramic and stainless steel contact surfaces to be welded, place a titanium foil with a thickness of 10 μm and a copper foil active intermediate alloy with a thickness of 120 μm in the order of ceramic-titanium foil+copper foil+titanium foil-stainless steel. Press the head tightly.

[0032] (3) Place the ceramic and stainless steel assembly with the active intermedi...

Embodiment 3

[0034] Example 3: Diffusion connection of a ceramic disc with a diameter of φ30mm×2mm and a high-speed tool steel disc with a diameter of φ30mm×2mm.

[0035] The specific process steps are as follows:

[0036](1) Pickle the surface of the high-speed tool steel disc with a diameter of φ30mm×2mm to be welded with 10% hydrochloric acid for 5 to 8 minutes, wash it with clean water, and dry it; use metallographic sandpaper to polish the surface of the steel to be welded to make the surface The roughness reaches Ra 2.0~3.0μm; then wipe the surface with alcohol and dry it. In addition, use alcohol to scrub the surface of the ceramic disc with a diameter of φ30mm×2mm to be welded and dry it.

[0037] (2) Between ceramics and steel to be welded contact surfaces, sandwich titanium powder in the order of ceramics-titanium powder+copper foil+titanium powder-high-speed tool steel with a purity of 99.9%, a particle size of 200-250 mesh and a thickness of 100μm Copper foil active master al...

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Abstract

This invention discloses diffusion link method for ceramics and steel by adding active intermediate alloy with main character as follows: add active intermediate alloy between the contact surfaces of ceramics and steel needed welding, use upper and lower pressure heads to press the needed welding ceramics / steel workpiece; put into vacuum chamber to take expansion link with technical parameters of heat temperature 1060-1180Deg, heat preservation time 25-60min, pressure 8-16MPa, and vacuum degree 2.5x10-4-1x10-5Pa. It solves efficiently the expansion link and obtains jointing with shear strength as high as 140MPa fit to use require for complex structure. The invention has advantages of low cost, simple and convenient technique, high applicability and easy to spread.

Description

technical field [0001] The invention relates to a method for diffusion connection between ceramics and steel, in particular to a method for diffusion connection between ceramics and steel by adding active intermediate alloy, and belongs to the technical field of welding. Background technique [0002] Structural ceramics have excellent high temperature resistance, corrosion resistance and chemical stability, and are a promising structural material. Due to the inherent brittleness of ceramic materials and the difficulty of preparing high-performance components, welding ceramics and steel together to form composite structures has broad application prospects in the fields of energy, chemical industry, electronics, automobiles, and aerospace. [0003] The existing connection between ceramic and metal mainly adopts brazing method, including ceramic-metallization brazing method and ceramic-metal active brazing method. Although the use of brazing method to connect ceramic-metal can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/16B23K20/24
Inventor 李亚江王娟张永兰
Owner SHANDONG UNIV
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