Tungsten — this is a solid refractory metal, element number 74 of the periodic table, is denoted as W, it has a density of 19.25 g / cm³, melting t ° 3422 ° C and a boiling t ° over 5500 ° C. Tungsten powder is a heavy mass of finely divided with high hardness and high melting point. It serves as the basis for a compact metal. Please receive rods which are workpieces of tungsten rods, wire, sheets, as well as the basis for the sintering of solid heat-resistant alloys by powder metallurgy.
|The atomic (molar) mass g / mol||The degree of oxidation||Density [g / cm3]||Melting point t ° C||The boiling point of t ° C||The heat of fusion kJ / kg|
|183.84||0, 2, 3, 4, 5, 6||19.25||3422 ° C||5500 ° C||191|
Stamps tungsten powder
The main brands are: VP, POE (highly active tungsten powder), MPP (low-active tungsten powder), OEM (Technical tungsten powder). They are produced according to TU 48−19−72−92 «Tungsten powder. Those. conditions». The average grain diameter of the powder brands DID and HTP is 3.5 — 6 m (40% grade tungsten powder grains have a size PVN than 4 microns), POE 0.8 — 1.7 microns.
Hard and refractory Tungsten is the basis of tool and high speed steels, wear-resistant and heat-resistant steels, non-consumable electrode and electric appliances. Tungsten powder is used as a main component and a high-speed steel tools and the dopant as well as heat-resistant and wear-resistant alloys (such as stellite). The basis of solid alloy volframokobaltovogo type VC is tungsten carbide. Tungsten powder, tungsten produce non-consumable electrode welding.
Tungsten powder produced three grades, depending on the scope and source of raw materials: tungsten powder TU-48−19−72−79
|mark||powder Name||starting material|
|POE||tungsten powder is a highly||Tungsten anhydride of ammonium paratungstate grade A or ammonium paratungstate high purity.|
|DID||tungsten powder is low-active||Tungsten anhydride of ammonium paratungstate grade A or malomolibdenisty ammonium paratungstate.|
|HTP||Technical tungsten powder||Tungsten trioxide or ammonium paratungstate ammonium paratungstate.|
|(O 2 and moisture)||0.25||0.35||0.2|
Mass fraction of tungsten — a metal framework and undetectable related impurities.
The fineness of the tungsten powder, characterized by an average diameter of particles of Fischer, and must comply with the following standards.
|mark||Fischer average grain diameter, mm|
|POE||0.8 to 1.7|
|DID||3.5 to 6.0|
|HTP||3.5 to 6.0|
— HRP powder grain content of more than 4 microns should be 40%.
— Bulk beats. powder weight and OEM brands DID = 3.0 — 5.5 g / cm³
— Bulk density of the brand PVV is not a rejection criterion and can not be determined.
Buy at a bargain price
In stock company «Electrovek-steel» in the presence of a wide range of high quality metal powders at the best prices. Tungsten powder is available in banks with gross weight up to 70 kg. Guaranteed shelf life of 24 months from the date of production. All products have a quality certificate of compliance with standards and specifications. The certificate is marked manufacturer, powder grade, chemical composition and properties. Implementation of orders — in the shortest possible time. Wholesale customers preferential prices.