Rare metal "tungsten" ~ ~ committed to achieving stable supply and resources circular society

There are a large number of mineral resources on the earth, use also is varied, is indispensable to our life.Among them, the "base metal" refers to the reserves, output of metals, including iron, aluminum, copper and so on, and as opposed to a "rare metal".Meti rare metal is defined as "the rarity of the metal on earth, or because of technical and economic aspects and difficult to extract, and the need to ensure the stable supply from policy"."W" (symbol = W) is one of the rare metals."W" in Swedish said "rocks", has unique characteristics.

It is a high melting point metal, melting point is 3380 ℃ (3653), the powder tungsten carbide (WC) and cobalt (Co) binder such as mixing, pressing and sintering, it can be made of hard alloy, high hardness is second only to diamond.In addition, it also has a high density, low thermal expansion rate, radiation shielding characteristics, widely used in cutting tools, machinery parts, electrode materials, heat dissipation material in many industrial fields.The current subject is the tungsten reserves regional difference is larger, the supply is not stable.

Sumitomo electric group manufacturing various cutting tools, need to use hard alloy, without tungsten, cannot be made of hard alloy.To launch a career as a steady, in the process of groping, sumitomo electric group through new technology and system to build, "recycling" tungsten ShiYeHua is implemented.In addition to the stable supply, the ShiYeHua also with one of the goals of SDGs "responsible consumption and production," shown in "to realize the sustainable management of natural resources and efficient use of the target echo.That is, its ShiYeHua circular society as the goal, in order to realize the resources contribute to environmental burden and environmental protection, etc.This special will introduce sumitomo electric group to carry out the "recycling" tungsten related measures.