Brad Boyle Committted, page-144

Hi ER,

How about this below.


Tungsten carbide, often called simply “carbide,” is a familiar material around the shop. This compound of tungsten and carbon has revolutionized the metal-cutting world over the decades, enabling increased speeds and feeds and providing longer tool life. Tungsten carbide was fi rst investigated as a cutting tool material in 1925, by Dr. Samuel Hoyt, a scientist at General Electric’s Lamp Department. Later GE opened the Carboloy division to produce tungsten carbide cutting tools. In the late 1930s, Philip M. McKenna, founder of Kennametal, discovered that adding a titanium compound to the mix made the tools work better at higher speeds. This began the march toward today’s lightning-fast cutting speeds.

Then, the fine particles of tungsten oxide 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.


Just maybe, they know some think that we don't


To read more click onto he link

http://www.researchgate.net/post/How_do_we_make_Tungsten_carbide_cutting_tool_inserts