Tungsten circle
It is better to err in price than in the product. John D. Rockefeller.
Advantages of tungsten circle
Tungsten — the most refractory of the metals, so the tungsten range has exceptional heat resistance and heat resistance. He has excellent mechanical properties: wear resistance, hardness at high temperatures and the lowest coefficient of thermal expansion among metals. From tungsten round good thermal conductivity, very high thermal creep resistance and very high modulus of elasticity. It is resistant to korrozii, the action of alkalis and acids, including concentrated solutions of hydrochloric, sulfuric and nitric acids, Aqua Regia. Tungsten round produced the most responsible and reliable of items.
Disadvantages
The main disadvantage is high cost. Tungsten is a rare metal, it is quite difficult to separate in pure form, it is refractory and cranky in the process. At normal temperatures, tungsten is not sufficiently plastic. Furthermore, it is very heavy, like gold.
Production
First, by powder metallurgy make blanks. Technological plasticity of tungsten is small, but with increasing temperature are improved without loss of strength. Therefore, tungsten circle get hot pressure treatment. It uses a special means of heat treatment and modern technology of chemical protection, as the hot tungsten readily reacts with atmospheric gases. Semi-finished shape by hot rolling, drawing or pressing in accordance with GOST 25 501−82. Tungsten circles of different purposes (VRN) and mark VA, with additives of silicon and aluminium, are produced with diameters 1−10 mm. the production Quality is controlled at all stages.
Use
Thin tungsten rounds Ø 1,6; 2; 3; 4 mm irreplaceable as consumable electrodes in arc welding; electronic and electrotechnical industry — for a special kind of contacts, which are soldered into glass, which current flows into vacuum tubes. Depending on diameter, surface conditions, and brand names of the circles you subsequently directly heated cathode ion sources for ion-implantation of installations and different types of heaters, for example in the glass industry for melting of the electrodes and stirrers of hot glass.
| Electrode type | Color | Current | Applications | Welding properties |
|---|---|---|---|---|
| WL15 — GOLD plus (1,5%La2 O3) | Golden | AC/DC | Stainless steel, alloyed and low-alloy steel. Alloys of aluminum, magnesium, titanium, Nickel, and copper. | Properties very good ignition and re-ignition. Stable arcing. Long service life. suitable as a replacement WT20 |
| WL20 (2% La2 O3) | Blue | AC/DC at a large current | Stainless steel, alloyed and low-alloy steel. Alloys of aluminum, magnesium, titanium, Nickel, and copper. | Properties very good ignition and re-ignition. Stable arcing. Long service life. suitable as a replacement WT20 |
| WC20 (2% cerium oxide) | Grey | AC/DC at low amperage current | Stainless steel, alloyed and low-alloy steel. Alloys of aluminum, magnesium, titanium, Nickel, and copper. | Properties very good ignition and re-ignition. Stable arcing. Long service life. suitable as a replacement WT20 |
| W 100% tungsten | Green | As | Alloys of aluminium, magnesium. | Worse the ignition and re-ignition than that of alloyed electrodes. Stable arcing. |
Buy at best price
In stock, LLC «Electrocentury-steel» always in stock a wide selection of high quality tungsten circle tungsten rod at a price that will satisfy any customer. We offer good conditions for wholesale and retail buyers. If necessary, advise you experienced managers. All products are certified. Quality is guaranteed by strict observance of technological norms of production. Delivery in the shortest possible time. At wholesale orders are provided preferential discount.
