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Method for producing molybdenum component for magnetron cathode

A magnetron cathode, manufacturing method technology, applied in cold cathode manufacturing, discharge tube/lamp manufacturing, electrode system manufacturing, etc. Good density consistency, reduced manufacturing man-hours, and excellent flexural strength

Inactive Publication Date: 2008-01-02
顾进跃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this manufacturing process, the molybdenum end cap has been sintered twice at high temperature, which not only has high processing costs, but also causes low tensile and compressive strength of the molybdenum end cap.

Method used

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Experimental program
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Embodiment Construction

[0021] Since the molybdenum end cap and molybdenum rod in the molybdenum component are butt welded, the welding strength is above 1.7kg.cm, and 25kg / mm ​​should be applied during welding. 2 up to 35kg / mm 2 Pressure within the range, if the bending strength of the sintered molybdenum end cap is less than 35kg / mm 2 When it is used, its pressure resistance is low, and cracks or defects are prone to occur. And the bending strength of the molybdenum end cap in the molybdenum assembly made by the present invention needs to be greater than 35kg / mm 2 .

[0022] The conventional method for molybdenum end caps is to press molybdenum powder into shape, and then sinter in a high-temperature sintering furnace (heating the furnace body with resistance wire) at a temperature range of 1650°C to 1780°C. The heating method here is indirect heating, with heat conduction and heat Radiation dominates.

[0023] The molybdenum end cap in the molybdenum component of the present invention is manuf...

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PUM

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Abstract

The invention discloses a method for producing molybdenum element of cathode of magnetron, mainly comprising that first, fills molybdenum powder into a special mould, to be compressed into a molybdenum end cap blank, then sinters the molybdenum end cap blank in inertia gas in a middle-frequency sensitive sinter furnace, while the sinter temperature is between 1650-1800Deg. C, and the sinter time is 2-6h, to obtain an upper molybdenum end cap and a lower molybdenum end cap which bent resistance strength is higher than 35kg / mm2, second, uses laser welding to weld the upper and lower molybdenum end caps respectively with an annular welding sheets together, third, welds the upper molybdenum end cap welded with the annular welding sheet with a central molybdenum lead wire rod together, and welds the lower molybdenum end cap welded with the annular welding sheet with a side molybdenum lead wire rod together. The molybdenum produced by The invention can reduce the fraction defective in welding process, reduce the production time and cost.

Description

technical field [0001] The invention relates to a method for manufacturing a molybdenum assembly for a magnetron cathode, in particular to a method for manufacturing a molybdenum assembly for a magnetron cathode that can reduce the welding defect rate. Background technique [0002] As the cathode part of the magnetron, it is mainly composed of a coiled tungsten filament and a molybdenum component; the molybdenum component includes an upper and a lower molybdenum end cap, an annular solder sheet composed of Mo-Ru or Mo-Ru-Ni, and a molybdenum rod, of which the molybdenum rod Divided into central molybdenum lead rod and side molybdenum lead rod. When manufacturing molybdenum components, the upper molybdenum end cap and the lower molybdenum end cap are respectively welded to the annular solder sheet composed of Mo-Ru or Mo-Ru-Ni; then the central molybdenum lead rod is connected and fixed to the upper molybdenum end cap , The side molybdenum lead bar is connected to fix the lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/02H01J9/00
Inventor 顾进跃袁克艳杨贺良
Owner 顾进跃
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