Sapphire is a tungsten-rhenium alloy wire metallurgy, processing and electrochemical machining pressure as the main technical expertise to the wire with different characteristics, rods and products for the product, in order to create a single crystal sapphire for the main application areas
It is a system of tungsten industry has a branch high technological content and added value.
1 Sapphire tungsten-rhenium alloy wire Profile
Sapphire tungsten-rhenium alloy wire is an alloy of tungsten and rhenium wire composed in varying proportions.
Common models are:
W-3Re (rhenium containing 3%)
W-5Re (rhenium-containing 5%)
W-20Re (containing 20% ??rhenium)
W-25Re (containing 25% rhenium)
W-26Re (containing 26% rhenium)
Wherein, Model W-25Re (containing 25% rhenium), 0.5mm diameter tungsten-rhenium alloy wire now widely used in the manufacture of a single crystal sapphire.
1.1 powders and doping
Proportional reduction of low temperature pre-preparation phase composition suitable blue tungsten oxide, and blue tungsten oxide is doped tungsten powder pickling, depending on the demand for regulation of tungsten powder and rhenium powder.
The first element of uniformity of doping control, to be able to obtain a stable purity, scale, and the particle size of these three indicators requirements.
The use of advanced hydrogen reduction equipment, as well as doping, pickling, high-capacity V-blender, especially optimized for hydrogen production systems to provide a reliable guarantee for the implementation of powder technology
1.2 billet molding and sintering processing technology
Using isostatic round billet rolling after a sintered billet, which is the cable through the tungsten and molybdenum most advanced processing technology, preparation of billet unit weight 3 kg, the use of power-controlled vertical melting equipment, stable obtain density, purity and crystal
Granularity main indicators in line with the requirements of tungsten-rhenium billet.
Blooming rolling method to adapt a large billet, to achieve high-quality, large-scale production of the best processing methods. Beijing claims through the use of tungsten and molybdenum Technology Co. KDCKS three roll mill and multi-rack system technology to master it. At present, most
Businesses still use swaged hair blooming, but aspects of open technology and equipment, molds, and other ancillary facilities has shrunk, with advanced and rationality.
1.3 swaging and stretching techniques
Multimode string forging more with welding, high frequency continuous annealing, Big Wheel and multimode continuous drawing machine drawing machine application, using a large compression rate processing, oxidation annealing, such as the use of condensate crystal drawing dies, the composition of this section technical features.
Using a large compression ratio stretching, tungsten-rhenium wire protection has good high temperature performance with excellent positive. Pass compression ratio has been adopted specifications, ¢ 3.7-0.7mm range of 30% -40%, ¢ 0.7-0.2mm area
Between 18% -28%. Four to ten mold sliding mode multimode drawing machine has been applied.
1.4 Electrochemical Processing Technology
Because tungsten-rhenium alloy wire sapphire white silk with multi-supplier to state, so it is necessary to wash separately electrolytic corrosion, galvanic corrosion and electrolytic polishing reducing effect.
1.5 Management and Control Technology
Because they have a better grasp of APT from raw materials to the final tungsten and rhenium ammonium rhenium wire entire process measurement and control products and management techniques to develop more scientific focus process measurement and control standards, and has a full range of advanced testing methods,
Beijing claims through tungsten and molybdenum Ltd. is focused on creating ¢ 1.0-0.2mm range of crack detection system.
1.6 Equipment and Technology
Mixer, reduction furnace, vertical melting equipment, rotary forging machine, drawing machine, electrochemical etching equipment, testing equipment and packaging machines
Each volume 400-600g, per kilogram of 250m-260m. Vacuum-packed, jackets cartons, bags
Contact: Alice shen
Add: 7th Floor, Zhishang Hitech Building, No.9 Zhognda Road, Zhuzhou city, Hunan