Procedure to Make Tungsten Carbide Cutting Tools Ⅱ

In last part we know that only decades before, scientists found and used the new material tungsten carbide, first as carboloy, then later added with titanium compound, to make tungsten carbide cutting tools. Here we explain the procedure to make tungsten carbide from tungsten ore.

Start In The Ground

There are several tungsten ores or minerals that can be mined and refined into tungsten or made into tungsten carbide. Wolframite is the best known. The ore is crushed, heated and treated with chemicals (acids or alkalis). The result is tungsten oxide after sodium tungstate. And tungsten oxide are to be treated with hydrogen to get pure tungsten metal powder.

Then, the fine tungsten oxide particles are carburized, turning them into tungsten carbide. In one method, the tungsten oxide is mixed with graphite (carbon). This mixture is heated to over 1200˚ C (2200˚ F) and a chemical reaction occurs that removes the oxygen from the oxide and combines the carbon with the tungsten to yield tungsten carbide.

(To be continued-This article is divided into several parts and this is part 2, for part 1 please refer to http://news.chinatungsten.com/en/tungsten-information/80244-ti-10321; for part 3 please refer to http://news.chinatungsten.com/en/tungsten-information/80247-ti-10323)

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