Tungsten Alloy Blanks Preparation Process(b)

Swaged rods final diameter of about 3 mm. Available swaging draw blank drawing production, but also the production of usable rolling method; rolling billet production pass deformation large, relatively homogeneous, in favor of subsequent processing. Drawn tungsten tungsten blanks with "warm brushed" method. First, pull on the chain stretching machine to a diameter of 1.3 mm, respectively, and then pull through coarse, medium and fine pull pull so diameter of less than 0.06 mm 0.2,0.06.

With the reduced diameter, so that the heating temperature should drop, drawing speed. Pass deformation is generally between 10 to 20%. Drawing coal gas - air mixture is heated at a temperature of 900 ~ 400 ℃. Pull thick wire with carbide dies, diamond mold is used to pull the filaments. Mold material, pass, grinding technology has a great influence on the quality of the wire, graphite lubricant quality, particle size, proportion, coating methods also affect the quality of the wire. Inhomogeneity wire diameter is one of the most important reason of broken wires when used, there are 0.2 to 0.4 micron deviation will cause a vacuum in the tungsten filament life is greatly reduced.

Diameter filament material can be used gravimetric method or vacuum measurement standard current law. In the drawing process, as the diameter decreases, the deformation resistance is increased (e.g., fracture strength tungsten wire diameter of 0.1 to 0.3 mm can be up to 350 kgf / mm 2), the plastic is reduced accordingly. In order to further improve the processing performance, generally eliminate the need for intermediate stress annealing. In addition, the electrolytic etching can be processed into a wire filament diameter of less than 0.01 mm.

Plate Rolling

Tungsten can be divided into hot-rolled plate rolling, warm rolling and cold rolling. Due to the large deformation resistance of tungsten, ordinary rolls not fully meet the requirements of the tungsten plate rolling, you should use special materials roll. When rolling, the roll is preheated, depending on rolling conditions, preheating temperature of 100 ~ 350 ℃.




Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

• < Prev
• Next >