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Halogen filament and process for manufacturing the same

A filament and halogen technology, applied in the field of tungsten filament, can solve the problem of increasing the production cost of filament, and achieve the effects of increasing tensile strength, high cold resistance value, and reducing filament breakage rate

Inactive Publication Date: 2007-12-05
XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of a small amount of rhenium will increase the production cost of the filament, but it is more economical in general

Method used

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  • Halogen filament and process for manufacturing the same
  • Halogen filament and process for manufacturing the same

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Embodiment Construction

[0017] The tungsten-rhenium alloy wire in the present invention is doped tungsten wire (containing potassium-aluminum-silicon), the content of potassium is 80-100ppm, and the content of rhenium is 0.4-0.8%. In the matrix. The existence of potassium can ensure the formation of regular potassium bubble strings in the wire drawing process, so that the tungsten wire can form a dovetail-like elongated grain structure in the process of recrystallization, thereby improving the anti-sagging performance of the tungsten wire; the existence of rhenium can Strengthen the grain boundary and increase the recrystallization temperature of the filament. Under the combined effect of potassium bubbles and rhenium, the filament has a high initial recrystallization temperature, the initial recrystallization temperature exceeds 2100 degrees Celsius, and the aspect ratio of the crystal grains is greater than 15.

[0018] Tungsten-rhenium alloy is a solid-solution alloy. Due to the solid-solution st...

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Abstract

The invention provides a halogen filament and the making method thereof, as compared with traditional anti-drooping filament, W-Re alloy wire has high recrystallization temperature and greater crystal grain length-width ratio and contains K, Al and Si doping agents, and the crystal grain length-width ratio is greater than 15; and the content of Re in the alloy is 0.4-0.8mass%. And the concrete making process comprises: preparing alloy powder with Re content of 0.4-0.8mass%, and preparing W-Re alloy sintered bar by isostatic pressing, presintering and vertical sintering; making the sintered bar into W-Re alloy wire by rotary swaging and drawing and coiling the W-Re alloy wire into filament. And the filament has stable crystal grain structure and can better apply to halogen W lamps.

Description

technical field [0001] The invention relates to a tungsten filament working in a high-temperature environment, especially a halogen lamp, and improves the recrystallization temperature and anti-vibration performance of the tungsten filament. Background of the invention [0002] The tungsten-rhenium filament used in halogen incandescent lamps can work at a higher temperature and has a higher recrystallization temperature. It can be widely used in stage lights, photography lights and lights for some special occasions. The typical working temperature of the filament is 2900-3200 degrees Celsius. The filament has a longer life at this working temperature. It can not only effectively solve the short life of the traditional anti-sagging doped tungsten wire, but also has a larger grain length and width. than and lower droop values. [0003] For a given output luminous effect, using a smaller size filament at a higher operating temperature is suitable for market demand. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01K1/10
Inventor 李猛进庄志刚
Owner XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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