Tungsten was first used to produce incandescent filament, not pendulous tungsten filament and cathode materials are excellent extensive use. In order to make Tungsten alloy materials is used as high-temperature components used in the aerospace industry. Tungsten smelting and processing forming technology also carried out the research, the use of consumable arc and electron beam melting tungsten ingot obtained and made by extrusion and plastic processing certain products; but the melting of the ingot coarse grains, plastic poor , processing difficulties, finished product rate, thus melting - plastic processing failed to become a major means of production. In addition to chemical vapor deposition (CVD method) and plasma spraying can produce very few products, powder metallurgy is still the primary means of manufacturing tungsten metals products.
没有评论:
发表评论