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Welding method for aluminum oxide ceramic and molybdenum

A technology of alumina ceramics and welding method, applied in welding equipment, welding equipment, auxiliary welding equipment and other directions, can solve the problems of complex process, short circuit of workpiece, long processing cycle, etc., and achieve the effect of simple operation

Active Publication Date: 2019-12-13
BAOJI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is complex, involving many equipment, long processing cycle, high process requirements, solder extension is easy to form a short circuit of the workpiece, and solder outgassing is easy to affect the vacuum degree of the vacuum chamber

Method used

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  • Welding method for aluminum oxide ceramic and molybdenum

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A welding method for alumina ceramics and metal molybdenum, comprising the steps of:

[0024] S1. Degreasing, pickling, drying and sandblasting the surface to be welded between the alumina ceramic cover and the metal molybdenum column;

[0025] S2. Use powder materials to carry out cold spraying treatment on the welding surface of alumina ceramic cover and metal molybdenum column; the process parameters of cold spraying are: the working gas is compressed air, the carrier gas temperature is 350°C, and the carrier gas pressure is 0.6MPa. The distance is 15mm, and the spraying speed is 0.5m / s; the powder material is obtained by mixing the following raw materials in mass percentage: high aluminum bronze powder 20%, pure copper powder 25%, Al 2 o 3 Powder 15%, Na 2 CO 3 3.1%, SiO 2 36.9%;

[0026] S3. Butt the aluminum oxide ceramic cover with the metal molybdenum column, so that the protrusion provided on the inner wall of the alumina ceramic cover enters the chute pro...

Embodiment 2

[0030] A welding method for alumina ceramics and metal molybdenum, comprising the steps of:

[0031] S1. Degreasing, pickling, drying and sandblasting the surface to be welded between the alumina ceramic cover and the metal molybdenum column;

[0032] S2. Use powder materials to carry out cold spraying treatment on the welding surface of alumina ceramic cover and metal molybdenum column; the process parameters of cold spraying are: the working gas is compressed air, the carrier gas temperature is 350°C, and the carrier gas pressure is 0.6MPa. The distance is 15mm, and the spraying speed is 0.5m / s; the powder material is obtained by mixing the following raw materials in mass percentage: high aluminum bronze powder 30%, pure copper powder 30%, Al 2 o 3 Powder 20%, K 2 CO 3 9.3% SiO 2 10.7%;

[0033] S3. Butt the aluminum oxide ceramic cover with the metal molybdenum column, so that the protrusion provided on the inner wall of the alumina ceramic cover enters the chute prov...

Embodiment 3

[0037] A welding method for alumina ceramics and metal molybdenum, comprising the steps of:

[0038] S1. Degreasing, pickling, drying and sandblasting the surface to be welded between the alumina ceramic cover and the metal molybdenum column;

[0039] S2. Use powder materials to carry out cold spraying treatment on the welding surface of alumina ceramic cover and metal molybdenum column; the process parameters of cold spraying are: the working gas is compressed air, the working gas is compressed air, the carrier gas temperature is 350 ° C, the carrier gas The pressure is 0.6MPa, the spraying distance is 15mm, and the spraying speed is 0.6m / s; the powder material is obtained by mixing the following raw materials in mass percentage: high-alumina bronze powder 25%, pure copper powder 27.5%, Al 2 o 3 Powder 17.5%, Na 2 CO 3 6.2%, SiO 2 23.8%;

[0040] S3. Butt the aluminum oxide ceramic cover with the metal molybdenum column, so that the protrusion provided on the inner wall...

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Abstract

The invention discloses a welding method for aluminum oxide ceramic and molybdenum. The welding method comprises the following steps of: (S1) carrying out oil removal, acid pickling, drying and sand blasting treatment on to-be-welded surfaces of an aluminum oxide ceramic cover and a molybdenum column; (S2) carrying out cold spray treatment on the welded surfaces of the aluminum oxide ceramic coverand the molybdenum column by adopting a powder material; (S3) abutting the aluminum oxide ceramic cover with the molybdenum column so that a lug boss arranged on the inner wall of the aluminum oxideceramic cover enters a sliding chute formed in the molybdenum column and the aluminum oxide ceramic cover is rotated to realize the operation of locking of the aluminum oxide ceramic cover and the molybdenum column; and (S4) putting the abutted aluminum oxide ceramic cover and molybdenum column in a heat treatment furnace, carrying out heat treatment for 1.5 h to 2 h at the temperature of 500 DEGC to 600 DEG C, cooling the product with the furnace and taking out the product to obtain a workpiece. The welding method disclosed by the invention breaks a traditional welding method for metals andceramics, is simple to operate, improves the work efficiency and simultaneously enhances the welding strength of the workpiece, and the shear strength of a joint is not lower than 120 Mpa.

Description

technical field [0001] The invention relates to the field of welding, in particular to a welding method for alumina ceramics and metal molybdenum. Background technique [0002] In the field of industrial production, many structural parts involve the connection of ceramic materials and metals. However, due to the large difference in thermal expansion coefficient between the two, high requirements are placed on welding, so mechanical connection is usually used for connection. The mechanical connection will inevitably bring a certain negative weight to the structural parts. [0003] In the electric vacuum industry, the traditional metal-ceramic welding method is to first metallize 95% of the alumina ceramics, and then braze the metallized ceramic metal part with the metal to achieve metal-ceramic welding. However, the process is complex, involving many equipment, long processing cycle, high process requirements, solder extension is easy to form a short circuit of the workpiec...

Claims

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Application Information

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IPC IPC(8): B23K31/02B23K37/00B23K103/18
CPCB23K31/02B23K37/00B23K2103/18
Inventor 李慧勤闫绍天王艳马蓉
Owner BAOJI UNIV OF ARTS & SCI