Explanatory expressions explain the inexplicable truth. Kozma bars.
Tungsten rod is made of the most refractory of known metals, t ° Melting tungsten + 3422 ° C. He does not lose the hardness even at high heat, has good thermal conductivity, minimal thermal expansion coefficient, high temperature creep resistance, high modulus of elasticity, exceptional electrical resistance. When heating to red heat and then cooling, the tungsten rod does not lose strength — this property is called the red hardness. Such rods are resistant to corrosion and corrosive gases and liquids, including at high temperatures. The need for modern industry in this product consistently for many years.
Tungsten — a rare element of the earth’s crust. The complexity of its production and processing due to exceptional properties affect the cost. At ordinary temperatures it is hard enough and ductile metal. In addition, the tungsten electrodes are very heavy. Houde. weight W is the same as that of gold — 19.3 g per 1 cu. cm.
W low technological plasticity at ordinary temperature, tungsten rods so obtained by treatment with hot pressurized. First, the method of powder metallurgy makes the workpiece — the so-called rod-. Then it is heated and rolled on a rotation forging machine up to Ø 2 — 3 mm… Comes a rod is generally straight lines.
Tungsten rod is indispensable for the production of parts working in extreme conditions of high temperatures and high loads during metal processing shock-rotary drilling, metallurgy, mechanical engineering, industrial chemistry MIC. It is used for doping tool steels, manufacturing mandrel piercing mills, matrix pressshtempeley. This rod is used in glass production as a consumable electrode and stirrers for glass melting. Thin tungsten rods used for welding as a heat-resistant and low-alloy steels. Tungsten wire is widely used in electrical engineering.
Table 1. Tungsten electrodes in pencil boxes for argon-arc welding
|WC-20 (gray||1.8−2.2% cerium dioxide||Stainless, acid- and heat-resistant steel and metals (tungsten, niobium, nickel, tantalum, titanium, and their alloys, brass, bronze, silicon bronze.|
|WL-20 (blue)||1.8−2.2% dioxide lanthanum||Connection of thin-sheet, high-alloy steel, surfacing on the forms, valves, cutting aluminum, bronze, copper and high-alloy steels.|
|WT-20 (red)||1.8−2.2% thorium dioxide||Current for welding — permanent. Easy arc ignition form Stability at high currents. Durability.|
|WZ8 (White)||0.8% of zirconium dioxide||AC welding critical joints. Easy ignition and arc stability. An alternative to pure tungsten|
|WP (green)||Net W without alloying additives||AC welding Al, Mg and their alloys. Satisfactory zazhigaemost arc. Sufficient lifetime.|
|WY-20 (dark blue)||1.8−2.2% yttrium oxide||DC welding most critical joints. Easy arc ignition, long service life.|
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In stock company «Electrovek-steel» is always in the presence of a wide range of high-quality tungsten rod and tungsten round at a price that will satisfy any customer. We offer good conditions for wholesale and retail buyers. If necessary, you advise experienced managers. All products are certified. Quality guaranteed by strict observance of technological norms of production. Deliveries — as soon as possible. For wholesale orders granted preferential discounts.